CN110491517A - A kind of threedimensional model locally translucent display operation implementation method and device - Google Patents
A kind of threedimensional model locally translucent display operation implementation method and device Download PDFInfo
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Abstract
This application involves technical field of image processing, more particularly to a kind of threedimensional model locally translucent display operation implementation method and device, in response to the behavior operation for the threedimensional model shown on screen, obtain the screen coordinate set that acquisition is successively picked up in the behavior operation, wherein, it include multiple screen coordinates in screen coordinate set, screen coordinate indicates the two-dimensional coordinate under screen two-dimensional coordinate system, local data block lock out operation of the behavior operation characterization to the threedimensional model；According to screen coordinate set, behavior operation corresponding closed curve on the threedimensional model is determined；Mark the tri patch in the closed curve on the corresponding threedimensional model；By the tri patch of label in such a way that preset transparency is shown, the threedimensional model is shown again on the screen, in this way, can the translucent or hiding display with localized region, actual operation operating process is simulated realistically, the effect of simulation virtual operation is improved.
Description
Technical field
This application involves technical field of image processing more particularly to a kind of threedimensional model, locally translucent display operation is realized
Method and device.
Background technique
Medical 3 D (3Dimensions, 3D) model is capable of providing intuitive human dissection and gains knowledge, in anatomy number
Change and all plays a significant role in teaching or surgical operation virtual emulation etc..During virtual operation or anatomic teaching, user
Each layer structure of local organization or the anatomical structure of more deep position are wished to, topography, part can be carried out to 3D model
It performs the operation or the operations such as part is viewed and emulated still in the prior art, is typically only capable to that the whole translucent display of 3D model progress cannot be expired
The demand of the sufficient translucent display of user's localized region tissue, can not the perfect simulation effect that actual operation process is presented.
Summary of the invention
The embodiment of the present application provides a kind of threedimensional model locally translucent display operation implementation method and device, is existed with realizing
The translucent display in part, simulates realistically the purpose of actual operative process on 3D model.
Specific technical solution provided by the embodiments of the present application is as follows:
The application one embodiment provides a kind of image procossing threedimensional model locally translucent display operation implementation method,
Include:
In response to the behavior operation for the threedimensional model shown on screen, obtains the behavior operation and successively pick up acquisition
Screen coordinate set, wherein in the screen coordinate set include multiple screen coordinates, screen coordinate indicate screen two dimension
Two-dimensional coordinate under coordinate system, local data block lock out operation of the behavior operation characterization to the threedimensional model；
According to the screen coordinate set, behavior operation corresponding closed curve on the threedimensional model is determined；
Mark the tri patch in the closed curve on the corresponding threedimensional model；
By the tri patch of label in such a way that preset transparency is shown, on the screen again described in display
Threedimensional model.
In conjunction with the application one embodiment, further comprise:
Obtain two-dimensional sequence binary image data；
Image iso-surface patch is carried out to the two-dimensional sequence binary image data, obtains corresponding threedimensional model, and show
On the screen.
Determine the behavior operation in the three-dimensional according to the screen coordinate set in conjunction with the application one embodiment
Corresponding closed curve on model, specifically includes:
According to the screen coordinate set, judge whether each screen coordinate can correspond in the screen coordinate set respectively
To the threedimensional model, judge to obtain the screen coordinate that can be corresponded on the threedimensional model；
It determines respectively and judges each screen coordinate obtained corresponding tri patch on the threedimensional model；
Shortest path of each two neighboring tri patch on the threedimensional model is determined respectively, wherein each two neighboring
Tri patch is that the screen coordinate sequence successively picked up according to behavior operation determines, is included at least in the shortest path
All tri patch passed through between two neighboring tri patch；
According to all tri patch of the composition shortest path including each two neighboring tri patch, the row is determined
To operate the corresponding closed curve on the threedimensional model.
Judged in the screen coordinate set respectively in conjunction with the application one embodiment according to the screen coordinate set
Whether each screen coordinate can correspond to the threedimensional model, judge that obtaining the screen that can be corresponded on the threedimensional model sits
Mark, specifically includes:
Screen coordinate each in the screen coordinate set is subjected to back project respectively, judges whether to obtain described
Depth information on threedimensional model, however, it is determined that depth information can be obtained, it is determined that screen coordinate can correspond to threedimensional model
On, however, it is determined that depth information cannot be obtained, it is determined that screen coordinate cannot correspond on threedimensional model.
In conjunction with the application one embodiment, determine that each two neighboring tri patch is most short on the threedimensional model respectively
When path, wherein be directed to two tri patch of arbitrary neighborhood, determine two tri patch of the arbitrary neighborhood in the three-dimensional mould
Shortest path in type, specifically includes:
If two tri patch of the arbitrary neighborhood are respectively tri patch A and tri patch B, the following step of execution is recycled
Suddenly, until determining that in the corresponding region of search divided of current new tri patch include the tri patch B being connected:
Multiple is set as radius using Euclidean distance between the mass center of current new tri patch and the tri patch B, with
The tri patch A is the center of circle, divides region of search, wherein current new tri patch is initially the tri patch A；
Determine each tri patch being connected in described search region with the current new tri patch, wherein be connected
Each tri patch connect indicates the vertex of each tri patch and the current new tri patch under threedimensional model coordinate system
Vertex is connected；
Determine the current new tri patch respectively to the shortest distance in the distance for each tri patch being connected
The tri patch A ' that is connected corresponding with the shortest distance, by the tri patch A ' as current new tri patch,
Continue to return that execute with the multiple that sets of Euclidean distance between the mass center of current new tri patch and the tri patch B be partly
Diameter, using current new tri patch as the center of circle, the step of dividing region of search；
It will include tri patch A and tri patch B and the corresponding triangular facet being connected of the shortest distance of all determinations
Piece constitutes the shortest path between the tri patch A to the tri patch B.
In conjunction with the application one embodiment, according to the institute of the composition shortest path including each two neighboring tri patch
There is tri patch, determine behavior operation corresponding closed curve on the threedimensional model, specifically include:
The mass center of all tri patch of the composition shortest path including each two neighboring tri patch is determined respectively
Coordinate；
Each center-of-mass coordinate is subjected to orthographic projection transformation, obtains the corresponding screen coordinate of each center-of-mass coordinate；
The corresponding screen coordinate of each center-of-mass coordinate is subjected to least square method fitting, obtaining includes that each mass center is sat
The continuous two-dimensional coordinate including corresponding screen coordinate is marked, and is based on the continuous two-dimensional coordinate, determines that the closure is bent
Line.
In conjunction with the application one embodiment, further comprise: the closed curve is shown using setpoint color.
In conjunction with the application one embodiment, the triangular facet in the closed curve on the corresponding threedimensional model is marked
Piece specifically includes:
According to the closed curve, the closed surface in the region constituted in the closed curve is determined；
All screen coordinates in the closed surface are subjected to back project, are obtained all in the closed surface
Screen coordinate corresponding tri patch on the threedimensional model, and be marked.
In conjunction with the application one embodiment, the value of the preset transparency is less than 1.
Another embodiment provides for a kind of local translucent display operation realization devices of threedimensional model by the application, comprising:
Module is obtained, for operating in response to the behavior for the threedimensional model shown on screen, obtains the behavior behaviour
Successively pick up the screen coordinate set of acquisition, wherein include multiple screen coordinates, screen coordinate in the screen coordinate set
Indicate the two-dimensional coordinate under screen two-dimensional coordinate system, local data block point of the behavior operation characterization to the threedimensional model
From operation；
Determining module, for determining that the behavior operation is right on the threedimensional model according to the screen coordinate set
The closed curve answered；
Mark module, for marking the tri patch in the closed curve on the corresponding threedimensional model；
Display module, for by the tri patch of label in such a way that preset transparency is shown, in the screen
On show the threedimensional model again.
In conjunction with another embodiment of the application, further comprise, processing module is used for:
Obtain two-dimensional sequence binary image data；
Image iso-surface patch is carried out to the two-dimensional sequence binary image data, obtains corresponding threedimensional model, and show
On the screen.
Determine the behavior operation described three according to the screen coordinate set in conjunction with another embodiment of the application
On dimension module when corresponding closed curve, determining module is specifically used for:
According to the screen coordinate set, judge whether each screen coordinate can correspond in the screen coordinate set respectively
To the threedimensional model, judge to obtain the screen coordinate that can be corresponded on the threedimensional model；
It determines respectively and judges each screen coordinate obtained corresponding tri patch on the threedimensional model；
Shortest path of each two neighboring tri patch on the threedimensional model is determined respectively, wherein each two neighboring
Tri patch is that the screen coordinate sequence successively picked up according to behavior operation determines, is included at least in the shortest path
All tri patch passed through between two neighboring tri patch；
According to all tri patch of the composition shortest path including each two neighboring tri patch, the row is determined
To operate the corresponding closed curve on the threedimensional model.
The screen coordinate set is judged according to the screen coordinate set respectively in conjunction with another embodiment of the application
In each screen coordinate whether can correspond to the threedimensional model, screen on the threedimensional model can be corresponded to by judging to obtain
When coordinate, determining module is specifically used for:
Screen coordinate each in the screen coordinate set is subjected to back project respectively, judges whether to obtain described
Depth information on threedimensional model, however, it is determined that depth information can be obtained, it is determined that screen coordinate can correspond to threedimensional model
On, however, it is determined that depth information cannot be obtained, it is determined that screen coordinate cannot correspond on threedimensional model.
In conjunction with another embodiment of the application, determine each two neighboring tri patch on the threedimensional model most respectively
When short path, wherein be directed to two tri patch of arbitrary neighborhood, determine two tri patch of the arbitrary neighborhood in the three-dimensional
When shortest path on model, determining module is specifically used for:
If two tri patch of the arbitrary neighborhood are respectively tri patch A and tri patch B, the following step of execution is recycled
Suddenly, until determining that in the corresponding region of search divided of current new tri patch include the tri patch B being connected:
Multiple is set as radius using Euclidean distance between the mass center of current new tri patch and the tri patch B, with
The tri patch A is the center of circle, divides region of search, wherein current new tri patch is initially the tri patch A；
Determine each tri patch being connected in described search region with the current new tri patch, wherein be connected
Each tri patch connect indicates the vertex of each tri patch and the current new tri patch under threedimensional model coordinate system
Vertex is connected；
Determine the current new tri patch respectively to the shortest distance in the distance for each tri patch being connected
The tri patch A ' that is connected corresponding with the shortest distance, by the tri patch A ' as current new tri patch,
Continue to return that execute with the multiple that sets of Euclidean distance between the mass center of current new tri patch and the tri patch B be partly
Diameter, using current new tri patch as the center of circle, the step of dividing region of search；
It will include tri patch A and tri patch B and the corresponding triangular facet being connected of the shortest distance of all determinations
Piece constitutes the shortest path between the tri patch A to the tri patch B.
In conjunction with another embodiment of the application, according to the composition shortest path including each two neighboring tri patch
All tri patch determine the behavior operation in corresponding closed curve on the threedimensional model, and determining module is specifically used
In:
The mass center of all tri patch of the composition shortest path including each two neighboring tri patch is determined respectively
Coordinate；
Each center-of-mass coordinate is subjected to orthographic projection transformation, obtains the corresponding screen coordinate of each center-of-mass coordinate；
The corresponding screen coordinate of each center-of-mass coordinate is subjected to least square method fitting, obtaining includes that each mass center is sat
The continuous two-dimensional coordinate including corresponding screen coordinate is marked, and is based on the continuous two-dimensional coordinate, determines that the closure is bent
Line.
In conjunction with another embodiment of the application, display module is further used for: the closed curve is used setpoint color
Display.
In conjunction with another embodiment of the application, the triangular facet in the closed curve on the corresponding threedimensional model is marked
When piece, mark module is specifically used for:
According to the closed curve, the closed surface in the region constituted in the closed curve is determined；
All screen coordinates in the closed surface are subjected to back project, are obtained all in the closed surface
Screen coordinate corresponding tri patch on the threedimensional model, and be marked.
In conjunction with another embodiment of the application, the value of the preset transparency is less than 1.
The application is another embodiment provides for a kind of electronic equipment, including memory, processor and is stored in memory
Computer program that is upper and can running on a processor, the processor realize any of the above-described kind of three-dimensional mould when executing described program
Type locally translucent display operation implementation method the step of.
The application is stored thereon with computer program another embodiment provides for a kind of computer readable storage medium,
The computer program realizes any of the above-described kind of threedimensional model locally translucent display operation implementation method when being executed by processor
The step of.
It in the embodiment of the present application, is operated in response to the behavior for the threedimensional model shown on screen, obtains behavior operation
The screen coordinate set of acquisition is successively picked up, and then determines behavior operation corresponding closed curve on threedimensional model, mark
Remember the tri patch in closed curve, thus when showing the threedimensional model again, by the tri patch of label with preset transparent
Degree is shown, in this way, operating for behavior, is navigated to threedimensional model itself, is only to three-dimensional mould from the point of view of visualizing angle
Type is operated, more specific true, and the regional area of operation is shown with preset transparency, may be implemented
The translucent or hiding display of regional area, simulates realistically the operating process of actual operation step-by-step.
Detailed description of the invention
Fig. 1 is the local translucent display operation implementation method flow chart of threedimensional model in the embodiment of the present application；
Fig. 2 is the principle framework figure of the local translucent display operation implementation method of threedimensional model in the embodiment of the present application；
Fig. 3 is the local translucent display operation realization device structural schematic diagram of threedimensional model in the embodiment of the present application；
Fig. 4 is electronic devices structure schematic diagram in the embodiment of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, is not whole embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
First simply to be introduced several concepts below convenient for the understanding to the embodiment of the present application:
Screen two-dimensional coordinate system: the upper left corner for defining on-screen display (osd) area is the origin of screen two-dimensional coordinate system, and screen is aobvious
The line direction for showing region is the positive direction of the x-axis of screen two-dimensional coordinate system, and the column direction of on-screen display (osd) area is screen two-dimensional coordinate
The positive direction of the y-axis of system, length unit are 1 pixel.
Threedimensional model coordinate system: the coordinate system of the threedimensional model shown on screen, In are primarily referred to as in the embodiment of the present invention
During display, under initial situation, world coordinate system and threedimensional model coordinate system are overlapped, coordinate and three-dimensional in world coordinate system
Coordinate in model coordinate systems corresponds.
Orthographic projection: refer to the process of and the coordinate of threedimensional model is converted into screen coordinate.
Back projection: being the process that screen coordinate is converted to the coordinate of threedimensional model.
It in the embodiment of the present application, is operated in response to the behavior for the threedimensional model shown on screen, obtains behavior operation
The screen coordinate set of acquisition is successively picked up, and determines closed curve corresponding on threedimensional model, by three in closed curve
Tri patch on dimension module shows the threedimensional model in such a way that preset transparency is shown again on the screen, this
Sample can be realized the function such as part is translucent, part hides mainly for the selected regional area of the behavior operation of threedimensional model
Can, the vivider actual dissection operative process of simulation, such as endoscope-assistant surgery etc. can clearly show that deep needs emphasis prominent
Anatomical structure out, and the anatomical structure of superficial part can be allowed not lose a large amount of anatomic informations, and process object can be positioned as
Threedimensional model itself, the rear projection screen part except threedimensional model is not involved in calculating, more specific true.
It should be noted that it is applied to field of medical technology mainly for three-dimensional medical model in the embodiment of the present application, but
It is to be not limited in medicine service application, is also all applicable for other similar problems and service application.
The image method in the embodiment of the present application is illustrated below, as shown in fig.1, in the embodiment of the present application three
The local translucent display operation implementation method flow chart of dimension module, this method comprises:
Step 100: being operated in response to the behavior for the threedimensional model shown on screen, acquisition behavior operation is successively picked up
The screen coordinate set of acquisition, wherein include multiple screen coordinates in screen coordinate set, screen coordinate is indicated in screen two dimension
Two-dimensional coordinate under coordinate system, local data block lock out operation of the behavior operation characterization to threedimensional model.
In the embodiment of the present application, behavior operation is carried out to threedimensional model, it can be using the interaction such as mouse, touch screen provided
Tool is operated, and is not limited, in this way, can get first when carrying out behavior operation by interactive tools such as mouses
Each screen coordinate successively picked up forms screen coordinate set, wherein behavior operation is grasped for the local detachment to threedimensional model
Make, i.e. realization localized region is individually operated, for example, by mouse, closed curve is delimited on threedimensional model, in closed curve
Region be that user needs individually operated regional area, the translucent of the regional area may be implemented in the embodiment of the present application
Display.
Further, a kind of threedimensional model display side is additionally provided before executing step 100, in the embodiment of the present application
Formula, specifically:
S1, two-dimensional sequence binary image data are obtained.
For example, acquisition medical image, it is assumed that the pixel of every image is i*j, and the number of acquired image is n, thickness
It is expressed as slicethickness, pixel separation is expressed as pixcelspacing, carries out tissue to ROI in Medical Image
Segmentation and Boundary Extraction, available corresponding two-dimensional sequence binary image, i.e. one group of three-dimensional data matrix, size can be with
It indicates are as follows: i*j* [(n*slicethickness)/pixcelspacing] is essentially the three-dimensional initial data of threedimensional model.
S2, image iso-surface patch is carried out to two-dimensional sequence binary image data, obtains corresponding threedimensional model, and be shown in
On screen.
Wherein, carrying out image iso-surface patch can be using the iso-surface patch algorithm of setting, in the embodiment of the present application and without aobvious
Show, carry out image iso-surface patch, obtains the corresponding threedimensional model of two-dimensional sequence binary image data, data format stl, stl
Formatted data can directly display, i.e., can be displayed on the screen object by image iso-surface patch.
In addition, above-mentioned three-dimensional initial data and threedimensional model can be placed in the same coordinate system, the coordinate total energy of threedimensional model
Corresponding position is found in three-dimensional initial data.
Step 110: according to screen coordinate set, determining behavior operation corresponding closed curve on threedimensional model.
Step 120: the tri patch in label closed curve on corresponding threedimensional model.
It when executing step 120, specifically includes: according to closed curve, determining that the closure in the region constituted in closed curve is bent
Face；All screen coordinates in closed surface are subjected to back project, obtain all screen coordinates in closed surface three
Corresponding tri patch on dimension module, and be marked.
Wherein, back project here is identical with back project in above-described embodiment, just repeats no more here.
In this way, the interior zone that closed curve surrounds may be constructed a closed surface, it, can be true by back project
The tri patch for determining all screen coordinate back projections in closed surface, is marked these tri patch, it is known that, these marks
The tri patch of note is to constitute the regional area of behavior operation respective operations on threedimensional model.
Step 130: by the tri patch of label in such a way that preset transparency is shown, showing again on the screen
Threedimensional model.
Wherein, less than 1, the value of specific transparency is simultaneously not limited the value of preset transparency, can be according to reality
Border scene and demand are configured, such as transparency is between 0~99%, then can local translucent display, such as can will
Skin transparency is arranged to 30%, so that it may local interior tissue organ is seen through skin, it, can be with when transparency is 0
Part hides display.
Also, when showing the threedimensional model again, the tri patch of the label in closed curve is translucent or hiding aobvious
Show, remaining unlabelled tri patch is normally shown, it is believed that transparency value is 1, so as to realize three-dimensional mould
The translucent or hiding display of regional area, allows a user to the anatomical structure for seeing actual deep part, not by it in type
The vision of its display area is interfered, and the operating process of more true dissection operation step-by-step can be simulated, for example, simulation caesarean birth
The shearing manipulation of the tissues such as skin, muscle is successively opened in operation, such as simulating endoscope-assistant surgery process, translucent can be shown
The part cavity of operative region, rather than whole cavity, in order to avoid cause unnecessary whole translucentizations, convenient for user's study and
Viewing.
Further, the corresponding closed curve on threedimensional model operated for determining behavior, in the embodiment of the present application
A kind of possible embodiment is additionally provided, closed curve is shown using setpoint color, wherein setpoint color is preferably area
The color of other threedimensional model can be formed in this way, can show the closed curve with setpoint color line on threedimensional model surface
Behavior operates the outer boundary of picking region, can be used for carrying out vision differentiation to translucent area and opaque region display, mention
Visual effect is risen, and closed curve is shown on threedimensional model, rather than on screen, simulation virtual hand truer in this way
The process of art, the closed curve may be considered the path of scalpel process.
It closes below to according to screen coordinate set, determining that behavior operation is corresponding on threedimensional model in above-mentioned steps 110
The specific embodiment for closing curve is illustrated, and when executing step 110, is specifically included:
S1, according to screen coordinate set, judge whether each screen coordinate can correspond to three in screen coordinate set respectively
Dimension module judges to obtain the screen coordinate that can be corresponded on threedimensional model.
It specifically includes: screen coordinate each in screen coordinate set being subjected to back project respectively, judges whether to obtain
Obtain the depth information on threedimensional model, however, it is determined that depth information can be obtained, it is determined that screen coordinate can correspond to three-dimensional mould
In type, however, it is determined that depth information cannot be obtained, it is determined that screen coordinate cannot correspond on threedimensional model.
Wherein, it is off screen curtain on threedimensional model that back project, which is mainly by the screen coordinate back projection that behavior operation is picked up,
Nearest threedimensional model coordinate, i.e., be converted to threedimensional model coordinate for screen coordinate, and specifically, screen coordinate is to what comes into a driver's body coordinate
Conversion, for example, obtaining depth information by glreadpixcel according to screen coordinate；Again by what comes into a driver's body coordinate to open graphic library
Threedimensional model coordinate is converted in (Open Graphics Library, OpenGL), such as is obtained currently by gluUnProject
Corresponding threedimensional model coordinate under projection, wherein glreadpixcel and gluUnProject is function in OpenGL.
In this way, if screen coordinate is fallen on threedimensional model, can be obtained by the back project of screen coordinate
To the depth information of corresponding threedimensional model, if screen coordinate is not fallen on threedimensional model, depth information cannot be got,
Therefore, in the embodiment of the present application, depth information can be got by judging whether, the screen coordinate to judge that behavior operates is
It is no to fall on threedimensional model, if screen coordinate can be fallen on, that is, correspond on threedimensional model, then save the screen coordinate, if screen
Curtain coordinate cannot correspond on threedimensional model, and possible operation has arrived other regions on screen in addition to threedimensional model, then abandons
The screen coordinate, so that the sequence of Behavior-based control operation, successively saves the screen coordinate that can be corresponded on threedimensional model.
In such manner, it is possible to which the point for guaranteeing that behavior operation is picked up all is fallen on threedimensional model, process object is navigated into three-dimensional
Model itself, behavior operation are all to carry out on threedimensional model, and the subsequent rear projection screen calculated except threedimensional model is not joined
It with calculating, is calculated only for the point fallen on threedimensional model, reduces computation complexity, seen in visualization angle, only for
Threedimensional model is operated, also more specific true.
For example, the screen coordinate collection that acquisition is successively picked up in behavior operation is combined into U { (sx1,sy1),(sx2,sy2) ... ..., lead to
It crosses judgement and only saves the screen coordinate that can wherein correspond on threedimensional model, remaining screen coordinate abandons, such as judgement obtains
Each screen coordinate obtained is (sx1,sy1),(sx2,sy2),(sx4,sy4),(sx5,sy5) ..., the screen coordinate of preservation is also and goes
It is corresponding for operation order.
S2, each screen coordinate for judging acquisition corresponding tri patch on the threedimensional model is determined respectively.
Specifically, each screen coordinate filtered out is subjected to back project, it is obtained by glreadpixcel function
The corresponding tri patch on threedimensional model, and the sequence of each screen coordinate obtained according to the judgement of preservation, successively save each
Tri patch.
S3, shortest path of each two neighboring tri patch on threedimensional model is determined respectively, wherein each two neighboring three
Edged surface piece is that the screen coordinate sequence successively picked up according to behavior operation determines, two neighboring three are included at least in shortest path
All tri patch passed through between edged surface piece.
For example, each screen coordinate that judgement obtains is followed successively by (sx1,sy1),(sx2,sy2),(sx4,sy4),(sx5,sy5) ...,
And (sx1,sy1),(sx2,sy2),(sx4,sy4),(sx5,sy5) ... corresponding tri patch is respectively A, B, C, D ..., then knows
Each two neighboring tri patch is respectively A and B, B and C, C and D, and so on.
In the embodiment of the present application, the screen successively picked up is operated since two neighboring tri patch here corresponds to behavior
Curtain coordinate sequence, and judged the screen coordinate that can be corresponded on threedimensional model, the screen coordinate judged may
Be it is discontinuous, therefore, obtained two neighboring tri patch is not necessarily on threedimensional model to be tightly connected, for determination
The closed curve being continuously shown on threedimensional model, therefore each two neighboring tri patch is determined in the embodiment of the present application respectively
Shortest path on threedimensional model determines all tri patch that passed through shortest path includes.
Specifically, execute determine respectively each two neighboring tri patch in the step of the shortest path on threedimensional model,
For ease of description, being illustrated for for any pair of two neighboring tri patch in the embodiment of the present application, it is determined that should
Two tri patch of arbitrary neighborhood are specifically included in the shortest path on the threedimensional model:
If two S3.1, arbitrary neighborhood tri patch are respectively tri patch A and tri patch B, it is following to recycle execution
Step, until determining that in the corresponding region of search divided of current new tri patch include the tri patch B being connected:
1) multiple is set as radius, with three using Euclidean distance between the mass center of current new tri patch and tri patch B
Edged surface piece A is the center of circle, divides region of search, wherein current new tri patch is initially tri patch A.
Wherein, set multiple, preferably 2 times, in this way, can both guarantee to determine two neighboring tri patch it
Between shortest path, and the time can be reduced, reduce computation complexity.
Wherein, it for the calculation of Euclidean distance between the mass center of two neighboring tri patch, is mentioned in the embodiment of the present application
Supply a kind of possible embodiment:
For example, three vertex P of a tri patch1、P2、P3Coordinate be respectively P1(x1,y1,z1)、P2(x2,y2,z2)、
P3(x3,y3,z3), then the center-of-mass coordinate O of the tri patch is O (xc,yc,zc), wherein
Then the center-of-mass coordinate of for example two neighboring tri patch is respectively O1(xc1,yc1,zc1)、O2(xc2,yc2,zc2), the phase
Euclidean distance can indicate between the mass center of adjacent two tri patch are as follows:
2) each tri patch being connected in region of search with current new tri patch is determined, wherein what is be connected is each
Tri patch indicates that the vertex of each tri patch is connected with the vertex of current new tri patch under threedimensional model coordinate system.
Wherein, the tri patch being connected here indicates that actual coordinate is connected on threedimensional model, for example, each triangle
Dough sheet all includes three vertex, the coordinate on three of them available vertex, and then can be according to three vertex of tri patch
Coordinate, judges whether tri patch is connected, and can be a common vertex, or is also possible to there are two common top
Point may thereby determine that each tri patch being connected in region of search with current new tri patch.
3) determine current new tri patch respectively in the distance for each tri patch being connected the shortest distance and
The corresponding tri patch A ' being connected of the shortest distance continues to return and hold by tri patch A ' as current new tri patch
Row sets multiple as radius using Euclidean distance between the mass center of current new tri patch and tri patch B, with current new three
The step of edged surface piece is the center of circle, divides region of search.
After determining tri patch A ', by tri patch A ' as current new tri patch, and returns and continue to execute
Above-mentioned steps 1), circulation executes above-mentioned steps 1), 2) and 3), until determining the corresponding field of search divided of current new tri patch
It include the tri patch B being connected in domain, i.e. tri patch B is connected with current new tri patch.
It S3.2, will include tri patch A and tri patch B and the shortest distance of all determinations is corresponding is connected
Tri patch constitutes the shortest path between tri patch A to tri patch B.
All current new tri patch i.e. including tri patch A, and include composition three including tri patch B
Shortest path between edged surface piece A and tri patch B.
For example, shortest path between tri patch A and tri patch B can be with are as follows: tri patch A, tri patch A ', three
Edged surface piece A ", tri patch B, the length of shortest path are tri patch A to tri patch A ', and tri patch A ' arrives triangular facet
Piece A ", tri patch A " between the mass center of tri patch B Euclidean distance the sum of.
In this way, shortest path of each two neighboring tri patch on threedimensional model can successively be calculated, due to being point
It is not calculated based on two neighboring tri patch, therefore, what each obtained shortest path was connected to connect, each shortest path can
To merge, a complete path may finally be obtained, the path is saved, that is, saves all tri patch for constituting the path.
Certainly, for the determination of the shortest path of two neighboring tri patch, it is not limited in aforesaid way, there are also use
Other way in the embodiment of the present application and is not limited, it is therefore an objective to can be bonded by the calculating of shortest path, building
The closed curve on threedimensional model surface.
All tri patch of the composition shortest path of S4, basis including each two neighboring tri patch, determine row
To operate the corresponding closed curve on threedimensional model.
Specifically, a kind of possible embodiment is provided in the embodiment of the present application:
S4.1, respectively all tri patch of the determining composition shortest path including each two neighboring tri patch
Center-of-mass coordinate.
Since tri patch includes three vertex, for that the mass center of tri patch can be sat convenient for calculating orthographic projection transformation
It is denoted as the coordinate in threedimensional model coordinate system for the tri patch.
S4.2, each center-of-mass coordinate is subjected to orthographic projection transformation, obtains the corresponding screen coordinate of each center-of-mass coordinate.
It is converted by orthographic projection, the corresponding all tri patch of the shortest path determined projects on screen
One screen coordinate point.
Wherein, it is screen coordinate that orthographic projection transformation, which is by threedimensional model coordinate transformation, is displayed on the screen threedimensional model,
Three-dimensional coordinate of the center-of-mass coordinate of each tri patch in threedimensional model coordinate system is obtained respectively, and each three-dimensional coordinate is successively multiplied
With model transformation matrix, projective transformation matrix and viewport transform matrix, it is right under screen two-dimensional coordinate system to obtain each tri patch
The two-dimensional coordinate answered, specifically: viewpoint change: the first step determines the state of camera by gluLookAt function.Second step, mould
Type transformation: the position of threedimensional model, including model translation glTranslate, model rotation glRotate and scaling of model are adjusted
glScale.Third step, projective transformation: projecting to threedimensional model on two-dimensional screen, including perspective projection
GluPerspective and orthogonal projection glOrtho.4th step, the viewport transform: by glViewport by geometric transformation, throwing
Shadow converts and cuts transformed object and is shown in the region specified in screen window.
More specifically, providing a kind of possible mode in the embodiment of the present application:
1) during OpenGL is shown, under initial situation, world coordinate system and threedimensional model coordinate system are overlapped, for example,
(x, y, z, w) threedimensional model coordinate can use homogeneous coordinates, i.e., threedimensional model coordinate can be converted to the world by conversion
Three-dimensional coordinate under coordinate system, all transition matrixes also all use 4*4 matrix, and a conversion command is a corresponding 4*4 rank
Transition matrix, including viewpoint change matrix, model transformation matrix, for example, current matrix is C, transition matrix M, threedimensional model
Coordinate is v, then after conversion, coordinate system becomes CMv at this time.
2) coordinate dimensionality reduction being carried out using projective transformation, the above-mentioned three-dimensional coordinate finally obtained is reduced to two-dimensional screen coordinate,
Projective transformation matrix is created, by projective transformation matrix multiplied by current matrix, and viewport transform matrix is created, will be projected in what comes into a driver's body
Object be shown in two-dimensional viewport plane, i.e., current three-dimensional coordinate is converted to screen coordinate.
S4.3, the corresponding screen coordinate of each center-of-mass coordinate is subjected to least square method fitting, obtaining includes each mass center
Continuous two-dimensional coordinate including the corresponding screen coordinate of coordinate, and it is based on continuous two-dimensional coordinate, determine closed curve.
In this way, converting by orthographic projection, tri patch on threedimensional model is converted into screen coordinate, in order to guarantee to be connected
Continuous closed curve carries out least square to two neighboring screen coordinate respectively for the screen coordinate after center-of-mass coordinate conversion
Method fitting obtains continuous two-dimensional coordinate, i.e., continuous point, so that it is bent to obtain the closure that continuous two-dimensional coordinate is constituted
Line.
Further, judge that closed curve is inside and outside, obtain the screen coordinate of all the points inside closed curve, obtain
Closed surface.
It in the embodiment of the present application, is operated in response to the behavior for the threedimensional model shown on screen, obtains behavior operation
The screen coordinate set of acquisition is successively picked up, and is calculated by shortest path, determines that behavior operation is corresponding on threedimensional model
Closed curve marks the tri patch in closed curve on corresponding threedimensional model, thus by the tri patch of label with default
The mode that is shown of transparency, the threedimensional model is shown again on the screen, in this way, grasping for behavior on the screen
Make, determines closed curve corresponding on threedimensional model, and mark the tri patch on threedimensional model, process object can determine
Position is threedimensional model itself, and rear projection screen part is not involved in calculating, reduces computation complexity, and can guarantee behavior operation
Effect is carried out on threedimensional model, and dissection surgical procedure can be simulated, and is only to threedimensional model from the point of view of visualizing angle
It is operated, it is more specific true, also, translucent for the tri patch inside closed curve or hiding display, Ke Yishi
Translucent to the regional area of operation or hiding display in surgical procedure is now simulated, the process of virtual operation can be really simulated,
For example, the surgical procedure in thoracic cavity is opened in simulation, first remove skin, then cut muscle parts, then wipe out part lung tissue etc., it can
With translucent display from level to level, and the tissue of shearing can be retained and individually be operated, to promote simulation virtual hand
The effect of art promotes user's learning experience.
Using concrete application scene, to threedimensional model, locally translucent display operation implementation method is illustrated below, with three
It is threedimensional model locally translucent display in the embodiment of the present application referring particularly to shown in Fig. 2 for dimension module is medicine 3D model
The principle framework figure of operation realizing method.
As shown in Fig. 2, 1) medicine 3D model is shown, is converted by the building and orthographic projection of medicine 3D model, be shown in screen
On curtain.
2) visual display in path is picked up in behavior operation.
Specifically: acquisition behavior operates the screen coordinate set for successively picking up acquisition, carries out back project, and determination is being cured
Corresponding tri patch on 3D model is learned, and then by determining each two neighboring tri patch on medicine 3D model most respectively
Short path determines behavior operation corresponding closed curve on medicine 3D model, the i.e. path of behavior operation pickup, can make
It is distinctly displayed with setpoint color.
3) by all tri patch of the composition shortest path including each two neighboring tri patch, orthographic projection is carried out
Transformation, obtains corresponding screen coordinate, determines closed curve, and determine all screen coordinates inside closed curve, will close
All screen coordinates closed in curve carry out back project, obtain corresponding tri patch, and be marked.
4) based on label as a result, by the tri patch of label in such a way that preset transparency is shown, on the screen
Again it shows medicine 3D model, realizes the translucent visualization in part of medicine 3D model.
In this way, the regional area transparence display that behavior can be operated, can simulate realistically actual operation step-by-step
Operating process, user not only can see regional area each layer structure or more deep position structure, but also can not lose dissection letter
Breath.
Based on the same inventive concept, a kind of threedimensional model locally translucent display operation is additionally provided in the embodiment of the present application
Realization device, locally translucent display operation realization device can be hardware configuration, software module or hardware knot to the threedimensional model
Structure adds software module.Based on the above embodiment, as shown in fig.3, threedimensional model locally translucent display in the embodiment of the present application
Realization device is operated, is specifically included:
Module 30 is obtained, for operating in response to the behavior for the threedimensional model shown on screen, obtains the behavior
The screen coordinate set of acquisition is successively picked up in operation, wherein includes multiple screen coordinates in the screen coordinate set, screen is sat
Mark indicates the two-dimensional coordinate under screen two-dimensional coordinate system, local data block of the behavior operation characterization to the threedimensional model
Lock out operation；
Determining module 31, for determining the behavior operation on the threedimensional model according to the screen coordinate set
Corresponding closed curve；
Mark module 32, for marking the tri patch in the closed curve on the corresponding threedimensional model；
Display module 33, for by the tri patch of label in such a way that preset transparency is shown, in the screen
Again the threedimensional model is shown on curtain.
Optionally, further comprise that processing module 34 is used for:
Obtain two-dimensional sequence binary image data；Image surface is carried out to the two-dimensional sequence binary image data to draw
System obtains corresponding threedimensional model, and shows on the screen.
Optionally, it according to the screen coordinate set, determines that the behavior operation is corresponding on the threedimensional model and closes
When closing curve, determining module 31 is specifically used for:
According to the screen coordinate set, judge whether each screen coordinate can correspond in the screen coordinate set respectively
To the threedimensional model, judge to obtain the screen coordinate that can be corresponded on the threedimensional model；
It determines respectively and judges each screen coordinate obtained corresponding tri patch on the threedimensional model；
Shortest path of each two neighboring tri patch on the threedimensional model is determined respectively, wherein each two neighboring
Tri patch is that the screen coordinate sequence successively picked up according to behavior operation determines, is included at least in the shortest path
All tri patch passed through between two neighboring tri patch；
According to all tri patch of the composition shortest path including each two neighboring tri patch, the row is determined
To operate the corresponding closed curve on the threedimensional model.
Optionally, according to the screen coordinate set, judge in the screen coordinate set whether is each screen coordinate respectively
The threedimensional model can be corresponded to, when judging that acquisition can correspond to the screen coordinate on the threedimensional model, determining module
31 are specifically used for:
Screen coordinate each in the screen coordinate set is subjected to back project respectively, judges whether to obtain described
Depth information on threedimensional model, however, it is determined that depth information can be obtained, it is determined that screen coordinate can correspond to threedimensional model
On, however, it is determined that depth information cannot be obtained, it is determined that screen coordinate cannot correspond on threedimensional model.
Optionally, determine each two neighboring tri patch in the shortest path on the threedimensional model respectively, wherein needle
To two tri patch of arbitrary neighborhood, shortest path of two tri patch of the arbitrary neighborhood on the threedimensional model is determined
When, determining module 31 is specifically used for:
If two tri patch of the arbitrary neighborhood are respectively tri patch A and tri patch B, the following step of execution is recycled
Suddenly, until determining that in the corresponding region of search divided of current new tri patch include the tri patch B being connected:
Multiple is set as radius using Euclidean distance between the mass center of current new tri patch and the tri patch B, with
The tri patch A is the center of circle, divides region of search, wherein current new tri patch is initially the tri patch A；
Determine each tri patch being connected in described search region with the current new tri patch, wherein be connected
Each tri patch connect indicates the vertex of each tri patch and the current new tri patch under threedimensional model coordinate system
Vertex is connected；
Determine the current new tri patch respectively to the shortest distance in the distance for each tri patch being connected
The tri patch A ' that is connected corresponding with the shortest distance, by the tri patch A ' as current new tri patch,
Continue to return that execute with the multiple that sets of Euclidean distance between the mass center of current new tri patch and the tri patch B be partly
Diameter, using current new tri patch as the center of circle, the step of dividing region of search；
It will include tri patch A and tri patch B and the corresponding triangular facet being connected of the shortest distance of all determinations
Piece constitutes the shortest path between the tri patch A to the tri patch B.
Optionally, according to all tri patch of the composition shortest path including each two neighboring tri patch, really
In corresponding closed curve on the threedimensional model, determining module 31 is specifically used for for the fixed behavior operation:
The mass center of all tri patch of the composition shortest path including each two neighboring tri patch is determined respectively
Coordinate；
Each center-of-mass coordinate is subjected to orthographic projection transformation, obtains the corresponding screen coordinate of each center-of-mass coordinate；
The corresponding screen coordinate of each center-of-mass coordinate is subjected to least square method fitting, obtaining includes that each mass center is sat
The continuous two-dimensional coordinate including corresponding screen coordinate is marked, and is based on the continuous two-dimensional coordinate, determines that the closure is bent
Line.
Optionally, display module 33 is further used for: the closed curve is shown using setpoint color.
Optionally, when marking the tri patch in the closed curve on the corresponding threedimensional model, mark module 32
It is specifically used for:
According to the closed curve, the closed surface in the region constituted in the closed curve is determined；
All screen coordinates in the closed surface are subjected to back project, are obtained all in the closed surface
Screen coordinate corresponding tri patch on the threedimensional model, and be marked.
Optionally, the value of the preset transparency is less than 1.
It is schematical, only a kind of logical function partition to the division of module in the embodiment of the present application, it is practical to realize
When there may be another division manner, in addition, each functional module in the embodiment of the present application can integrate in a processor
In, it is also possible to physically exist alone, can also be integrated in two or more modules in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.
Based on the above embodiment, the structural schematic diagram of electronic equipment in the embodiment of the present application is shown refering to Fig. 4.
The embodiment of the present application provides a kind of electronic equipment, which may include 410 (Center of processor
Processing Unit, CPU), memory 420, input equipment 430 and output equipment 440 etc., input equipment 430 may include
Keyboard, mouse, touch screen etc., output equipment 440 may include display equipment, such as liquid crystal display (Liquid Crystal
Display, LCD), cathode-ray tube (Cathode Ray Tube, CRT) etc..
Memory 420 may include read-only memory (ROM) and random access memory (RAM), and mention to processor 410
For the program instruction and data stored in memory 420.In the embodiment of the present application, memory 420 can be used for storing this Shen
Please in embodiment the local translucent display operation implementation method of any threedimensional model program.
Processor 410 is by the program instruction for calling memory 420 to store, and processor 410 is for the program according to acquisition
The local translucent display operation implementation method of any threedimensional model in instruction execution the embodiment of the present application.
Based on the above embodiment, in the embodiment of the present application, a kind of computer readable storage medium is provided, is stored thereon with
Computer program, the computer program realize the part of the threedimensional model in above-mentioned any means embodiment when being executed by processor
Translucent display operation implementation method method.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from this Shen to the embodiment of the present application
Please embodiment spirit and scope.In this way, if these modifications and variations of the embodiment of the present application belong to the claim of this application
And its within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.
Claims (10)
1. a kind of local translucent display operation implementation method of threedimensional model characterized by comprising
In response to the behavior operation for the threedimensional model shown on screen, the screen that acquisition is successively picked up in the behavior operation is obtained
Curtain coordinate set, wherein include multiple screen coordinates in the screen coordinate set, screen coordinate is indicated in screen two-dimensional coordinate
Two-dimensional coordinate under system, local data block lock out operation of the behavior operation characterization to the threedimensional model；
According to the screen coordinate set, behavior operation corresponding closed curve on the threedimensional model is determined；
Mark the tri patch in the closed curve on the corresponding threedimensional model；
By the tri patch of label in such a way that preset transparency is shown, the three-dimensional is shown again on the screen
Model.
2. the method as described in claim 1, which is characterized in that further comprise:
Obtain two-dimensional sequence binary image data；
Image iso-surface patch is carried out to the two-dimensional sequence binary image data, obtains corresponding threedimensional model, and be shown in institute
It states on screen.
3. the method as described in claim 1, which is characterized in that according to the screen coordinate set, determine the behavior operation
The corresponding closed curve on the threedimensional model, specifically includes:
According to the screen coordinate set, judge whether each screen coordinate can correspond to institute in the screen coordinate set respectively
Threedimensional model is stated, judges to obtain the screen coordinate that can be corresponded on the threedimensional model；
It determines respectively and judges each screen coordinate obtained corresponding tri patch on the threedimensional model；
Shortest path of each two neighboring tri patch on the threedimensional model is determined respectively, wherein each two neighboring triangle
Dough sheet is that the screen coordinate sequence successively picked up according to behavior operation determines, is included at least in the shortest path adjacent
All tri patch passed through between two tri patch；
According to all tri patch of the composition shortest path including each two neighboring tri patch, the behavior behaviour is determined
Make the corresponding closed curve on the threedimensional model.
4. method as claimed in claim 3, which is characterized in that according to the screen coordinate set, judge the screen respectively
Whether each screen coordinate can correspond to the threedimensional model in coordinate set, and the threedimensional model can be corresponded to by judging to obtain
On screen coordinate, specifically include:
Screen coordinate each in the screen coordinate set is subjected to back project respectively, judges whether that the three-dimensional can be obtained
Depth information on model, however, it is determined that depth information can be obtained, it is determined that screen coordinate can correspond on threedimensional model, if
Determination cannot obtain depth information, it is determined that screen coordinate cannot correspond on threedimensional model.
5. method as claimed in claim 3, which is characterized in that determine each two neighboring tri patch in the three-dimensional mould respectively
When shortest path in type, wherein be directed to two tri patch of arbitrary neighborhood, determine that two tri patch of the arbitrary neighborhood exist
Shortest path on the threedimensional model, specifically includes:
If two tri patch of the arbitrary neighborhood are respectively tri patch A and tri patch B, execution following steps are recycled,
Until determining that in the corresponding region of search divided of current new tri patch include the tri patch B being connected:
Multiple is set as radius, with described using Euclidean distance between the mass center of current new tri patch and the tri patch B
Tri patch A is the center of circle, divides region of search, wherein current new tri patch is initially the tri patch A；
Determine each tri patch being connected in described search region with the current new tri patch, wherein be connected
Each tri patch indicates the vertex on the vertex of each tri patch and the current new tri patch under threedimensional model coordinate system
It is connected；
Determine the current new tri patch respectively in the distance for each tri patch being connected the shortest distance and institute
The corresponding tri patch A ' being connected of the shortest distance is stated, by the tri patch A ' as current new tri patch, is continued
It returns to execute and multiple is set as radius using Euclidean distance between the mass center of current new tri patch and the tri patch B, with
The step of current new tri patch is the center of circle, divides region of search；
Will include tri patch A and tri patch B and the corresponding tri patch being connected of the shortest distance of all determinations,
Constitute the shortest path between the tri patch A to the tri patch B.
6. method as claimed in claim 3, which is characterized in that most according to the composition including each two neighboring tri patch
All tri patch of short path determine behavior operation corresponding closed curve on the threedimensional model, specifically include:
The center-of-mass coordinate of all tri patch of the composition shortest path including each two neighboring tri patch is determined respectively；
Each center-of-mass coordinate is subjected to orthographic projection transformation, obtains the corresponding screen coordinate of each center-of-mass coordinate；
The corresponding screen coordinate of each center-of-mass coordinate is subjected to least square method fitting, obtaining includes each center-of-mass coordinate pair
Continuous two-dimensional coordinate including the screen coordinate answered, and it is based on the continuous two-dimensional coordinate, determine the closed curve.
7. as the method according to claim 1 to 6, which is characterized in that further comprise:
The closed curve is shown using setpoint color.
8. method as claimed in claim 6, which is characterized in that mark in the closed curve on the corresponding threedimensional model
Tri patch, specifically include:
According to the closed curve, the closed surface in the region constituted in the closed curve is determined；
All screen coordinates in the closed surface are subjected to back project, obtain all screens in the closed surface
Coordinate corresponding tri patch on the threedimensional model, and be marked.
9. the method as described in claim 1, which is characterized in that the value of the preset transparency is less than 1.
10. a kind of local translucent display operation realization device of threedimensional model characterized by comprising
Obtain module, for being operated in response to the behavior for the threedimensional model shown on screen, obtain the behavior operation according to
It is secondary to pick up the screen coordinate set obtained, wherein to include multiple screen coordinates in the screen coordinate set, screen coordinate indicates
Two-dimensional coordinate under screen two-dimensional coordinate system, the behavior operation characterization separate behaviour to local data's block of the threedimensional model
Make；
Determining module, for determining that the behavior operation is corresponding on the threedimensional model according to the screen coordinate set
Closed curve；
Mark module, for marking the tri patch in the closed curve on the corresponding threedimensional model；
Display module, in such a way that preset transparency is shown, weighing the tri patch of label on the screen
Newly show the threedimensional model.
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