CN105069827A - Method for processing video transitions through three-dimensional model - Google Patents
Method for processing video transitions through three-dimensional model Download PDFInfo
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Abstract
The invention relates to a method for processing video transitions through a three-dimensional model, and the method comprises the steps: building a three-dimensional animation switching module and switching three-dimensional animations, wherein the step of building the three-dimensional animation switching module comprises the following steps: marking a replacement plane and carrying out storing, and the step of switching three-dimensional animations comprises the following steps: obtaining image data, selecting a template, carrying out replacement, rendering, and outputting. Through the arrangement of the three-dimensional model template, the method achieves the quick adding of the three-dimensional animations into a video transition, and enables the editing process of three-dimensional animation switching to be very simple. The method employs a mode of automatic detection or interaction arrangement to support a three-dimensional article template, and the identification information of a three-dimensional article is built in advance. When there is a need, the template can be used without any editing and arrangement. Only if an icon of the representative temperate is pulled by a mouse to a joint position of two videos in a story template, can the actual operation process of broadcasting or editing be carried out.
Description
Technical field
The present invention relates to a kind of method adopting the transition of three-dimensional model process video, is a kind of disposal route of computer digit video file, is a kind of method building video file.
Background technology
Video transition is used for the transition between two videos, is a kind of method conventional in television program designing, and its gorgeous effect lifting section object can make quality.The transition of video can be considered a kind of animation, and conventional transition mode is divided into two-dimentional transition and the large class of three-dimensional transition two.Three-dimensional transition, due to dynamic clearly demarcated, the vivid and interesting of its picture, is more applied.The form that three-dimensional transition occurs is when two pictures need to switch, and scrolling, card is drawn the conversion between two faces of picture, three-dimensional geometry object, produces the effect of two pictures switchings.
Existing three-dimensional steering method, due to the complicacy of its picture making, are all the transition editors carrying out image under time more sufficient occasion, and under the occasion that some real-times are stronger, such as: news performs in a radio or TV programme scene, three-dimensional transition often cannot realize.Therefore, the editor how carrying out three-dimensional transition is fast the problem needing to solve.
Summary of the invention
For solving the problem of prior art, the present invention proposes a kind of method adopting the transition of three-dimensional model process video.Described method carries out editor and the making of three-dimensional animation at the scene that news is performed in a radio or TV programme, two sections of videos that can be received at scene fast use the mode of three-dimensional animation to edit fast together, on-the-spot broadcasting.
The object of the present invention is achieved like this: a kind of method adopting the transition of three-dimensional model process video, the system that described method uses comprises: be arranged on the image editor in server or server cluster, non-volume explorer, renderer, be provided with three-dimensional model construction unit in described image editor, this three-dimensional model construction unit is used for building three-dimensional object, virtual video camera, virtual light and making its animation;
It is characterized in that, described method comprises builds the process of three-dimensional animation switching template and the process of three-dimensional animation switching:
The process that described structure three-dimensional animation switches template comprises the steps:
The process that described structure three-dimensional animation switches template comprises the steps:
Obtain the step of three-dimensional model: import in image editor or build one as the three-dimensional model switched by three-dimensional model construction unit, and/or by three-dimensional model construction unit, secondary development being carried out to the three-dimensional model imported, three-dimensional model comprises three-dimensional object, virtual video camera, virtual light and animation thereof;
The step in mark replacement face: the replacement face of transition video is treated in two faces marking three-dimensional object by the mode of " automatically detect " or " arranging alternately " as two sections;
The step of storing template: using the identification information of the three-dimensional object in the replacement face of containing, the animation data of three-dimensional model as template stored in non-volume explorer;
The process that described three-dimensional animation switches comprises the steps:
Obtain the step of view data: obtain the sequence of video images before transition switching and the sequence of video images after switching;
Choose the step of template: the template choosing switching three-dimensional model at non-volume explorer, and obtain the identification information of the animation data of this three-dimensional model and the three-dimensional object as the face of replacement;
The step of replacing: find in handoff procedure the three-dimensional object comprising replacement face according to identification information, replaces with two sequence of video images before and after switching by the replacement face of its correspondence;
Play up and the step exported: each the frame scene image through described replacement step played up in handoff procedure by renderer, and export the scene image after playing up.
Further, the mode of " automatically detecting " in above-mentioned " step in mark replacement face " comprises following sub-step:
Identify the sub-step of three-dimensional modeling data: identify the component data as the animation starting point and ending point of the three-dimensional model switched and virtual video camera the points of measurement certificate;
The sub-step of three-dimensional object mark: utilize position relationship relative between virtual video camera with three-dimensional object, determine the replacement face before and after two sections of video transitions;
The sub-step that virtual video camera is corrected: utilize replacement face to correct virtual video camera parameter, to guarantee in animation starting and ending position, makes the full screen display of virtual video camera energy replace face;
The sub-step of record: the identification information recording the three-dimensional object as the face of replacement, and the animation data that virtual video camera parameter is additional three-dimensional model secondary development corrected in record.
Further, the mode of " arranging alternately " in above-mentioned " step in mark replacement face " comprises following sub-step:
Identify the sub-step of three-dimensional object data: identify the component data as the three-dimensional model switched;
The sub-step of interactive selection: choose two faces of replacement items as replacement face in the three-dimensional model identified;
Determine whether the sub-step of correcting camera: determine not correct, then directly enter next step " sub-step of record ";
Determine to correct, then enter next step " sub-step that virtual video camera is corrected ";
The sub-step that virtual video camera is corrected: utilize replacement face to correct virtual video camera parameter, to guarantee in animation starting and ending position, face is replaced in the full screen display of virtual video camera energy; Enter afterwards next step " sub-step of record ",
The sub-step of record: record the identification information as replacement items, the animation data that virtual video camera parameter is additional three-dimensional model secondary development corrected in record.
The beneficial effect that the present invention produces is: the three-dimensional animation in three-dimensional model, by arranging three-dimensional model template, joins in video by the present invention fast, makes to utilize three-dimensional animation to carry out the editing process of video transition switching very simple.Support that three-dimensional model template is the mode by " automatically detecting " or " arranging alternately ", mark three-dimensional object in advance, when deployed without the need to any editor and setting, just can apply these templates.In the operating process that reality is broadcasted or edited, only need one of them of the three-dimensional model template of optional storage in explorer, directly the template chosen is drawn to the position that in the Storyboard in image editor, two sections of videos switch by mouse, the video realizing three-dimensional animation very efficiently switches editor.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the system schematic that described in inventive embodiments one, method uses;
Fig. 2 is the process flow diagram of method described in inventive embodiments one;
Fig. 3 is the mathematical derivation diagram of the three-dimension varying of method described in inventive embodiments two, three;
Fig. 4 be method described in inventive embodiments two, three virtual video camera focusing mathematical derivation diagram, be video camera determine visual angle;
Fig. 5 is the mathematical derivation diagram of the virtual video camera focusing of method described in inventive embodiments two, three, is the LOOK LEFT of video camera.
Embodiment
Embodiment one:
The present embodiment is a kind of method adopting the transition of three-dimensional model process video, the system that described method uses comprises: be arranged on the image editor in server or server cluster, non-volume explorer, renderer, three-dimensional model construction unit is provided with in described image editor, be used for building three-dimensional object, virtual video camera, virtual light and making their animation, as shown in Figure 1.
Described image editor can be various nonlinear editing system, and it can use as the three-dimensional model file of the third party CG Software Creates such as 3DSMAX, MAYA, such as: .fbx .obj .3ds etc.These editing systems itself the are built-in construction unit of three-dimensional model, can create three-dimensional object and virtual video camera and virtual light etc. and making of cartoon, and can carry out secondary development to the three-dimensional model imported.
The resources bank of Storyboard that described non-volume explorer is a kind of various materials for using during keeping editor, template, editor's pilot process generate.Image editor can call the resource in non-volume explorer by interface accessing, and by the resource conservation that generates in editing process in non-volume explorer.
Described renderer is such as, for carrying out the facility played up specially, GPU, and playing up due to animation needs a large amount of hardware resources, and therefore, playing up in the present embodiment needs special renderer to carry out.Described renderer has the ability of multiple threads, can play up complete by the animation process of switching in the shortest time, so that real demand when catching up with live.
The process of " build three-dimensional animation and switch template " that method described in the present embodiment comprises and the process of " three-dimensional animation switching ":
The process of " building three-dimensional animation and switching template " sets up various template in advance, and these templates be alternatively stored in non-volume explorer, applies at any time for during editor.Template can have various ways, as: various regular polygon, ball-type, elliposoidal etc., can also comprise virtual video camera, the change animation of the scenery that shuttles back and forth.
" switching " described in the present embodiment is a kind of video transition, that is: be transitioned into another section of video pictures from one section of video pictures.
Before described switching, image is respectively the source video before transition and the target video after transition with the rear image of switching.
Described three-dimensional object is: the virtual article utilizing the geological informations such as three-dimensional point, line, surface to represent.
Described replacement face is: two faces of replacing the three-dimensional object of the forward and backward two sections of videos of transition.
Three-dimensional scenic: the virtual scene be made up of virtual video camera, virtual light source, three-dimensional object.
Virtual video camera: the camera function of simulate real world, can observe three-dimensional scenic by virtual video camera.
Three-dimensional scenic is played up: by the visual angle of virtual video camera, adopts render engine that three-dimensional scenic is played up piece image.
Three-dimensional model: a kind of model data (structure is shown in Fig. 1) utilizing 3 d modeling software to make.It comprises the data such as several virtual video cameras, virtual light source, three-dimensional object.Common model has the files such as fbx, obj, 3ds.
The structure of template can be repeated multiple times, so as the template that can build various pattern for.The process that described structure three-dimensional animation switches template comprises the steps, process flow diagram as shown in Figure 1:
Obtain the step of three-dimensional model: in image editor, import or build one obtain and/or make the three-dimensional animation of this three-dimensional model as the three-dimensional model switched, obtain the component data of three-dimensional animation starting point and ending point.This step is the three-dimensional model directly utilizing third party CG software development, or utilizes image editor to build three-dimensional model, as: regular polygon or spheroid etc., and texture mapping is carried out to geometric model, form three-dimensional object.Or the virtual scene that structure video camera passes through, or the three-dimensional model imported is carried out secondary development.
The step in mark replacement face: for choosing two replacement faces on three-dimensional object.Three-dimensional object is chosen two faces as replacement face, such as: using two of square sides as replacement face, or using two of spheroid hemisphere or part ball as replacement face.Or pass through on certain object of scene, and as: door, window etc. are as the face of replacement.
The replacement face of choosing marks three-dimensional object, to produce corresponding identification information by the mode of " automatically detecting " or " arranging alternately ".This step is the final steps of method described in the present embodiment." automatically detect " is adopt automatic mode, relative position between the virtual video camera of the terminal in component data and terminating point and three-dimensional object is detected, detect that the face of the object residing for the face that its middle distance virtual video camera is nearest is as replacement items, and for making replacement items in animation starting and ending position, in virtual video camera, full screen display, corrects virtual video camera.The parameter of the virtual video camera after correction is the data of secondary development.Automatic detection mode adopts three-dimensional object Automatic Logos and virtual video camera automatic straightening, revises three-dimensional model while obtaining identification information.Mutual setting is then manually select replacement face, and determine the rectification whether carrying out virtual video camera, if determine that virtual video camera needs to revise, then system carries out automatic virtual video camera correction, make the replacement face of selection at the initial sum final position of animation, can full screen display in virtual video camera.
It is indicate replacement items by fixing naming rule that traditional three-dimensional switches edit methods.This needs designer to understand Naming conventions, and when third party software designs, and name needing the object replaced in strict accordance with Naming conventions.Such mode is difficult to be used in live scene and carries out switching editor.The present embodiment does not then require name, go to mark replacement items by the mode automatically detected or arrange alternately after obtaining three-dimensional modeling data, make the editing process robotization of mark, for convenient, flexibly make template provide critical support, ensure that the ageing of three-dimensional model process video transition, make to utilize three-dimensional model to carry out video transition and become possibility in the scene of the application in real time such as news studio.
The step of storing template: using as replacing the identification information of object in face, the animation data of three-dimensional model as template stored in non-volume explorer.The animation effect that its corresponding icon is placed on the three-dimensional transition of Storyboard being called this template directly can be pulled after template is formed.
Above-mentioned steps repeatedly, can make multiple template, is stored in non-volume explorer, for editor.
Then can use in editing process after template is formed, the process that its three-dimensional animation switches comprises the steps:
Obtain the step of view data: the view data obtaining image after switching front image and switching.In the process switched, two sections of videos can have overlap in time.
Choose the step of template: for choosing the template of switching three-dimensional model at non-volume explorer, add by the mode directly pulling icon the joining place that two sections are treated the video sequence of transition by it to.Editor can according to the hobby of oneself, or the feature of program chooses template.Such as world news can use the model (ball-type template) of the earth, and the news of meeting, can use the template etc. of passing through gate, meeting-place.
The step of replacing: respectively the replacement face of frame out (face 1 as in just Fig. 1) replaced with image before switching, enter the replacement face of picture (face 2 as in just Fig. 1) replace with switch after image.Owing to establishing template, the process of replacement is very simple, and all parameters are all determined, without the need to any manual intervention, system completes automatically.The replacement face of described frame out refers to the face will left along with three-dimensional animation on the three-dimensional object in the virtual video camera observation visual field, and this face is sticked image before switching, and before switching, image is then switching forward sight each two field picture frequency domain in handoff procedure.Corresponding, the replacement face entering picture is then a face that will enter along with three-dimensional animation on the three-dimensional object in the virtual video camera visual field, and this face is sticked image after switching, and after switching, image switches backsight each two field picture frequency domain in handoff procedure.
Play up and the step exported: play up the three-dimensional animation scene in handoff procedure after replacing by renderer, and export the scene image after playing up.The three-dimensional animation effect of template can add the lap that two sections are treated transition video to, during the video effect of on-the-spot broadcast transition when having pulled rear needs will carry out real-time rendering by with two sections of video three-dimensional animations and export.The process played up can pass through on-the-spot server multiple threads, to catch up with the quick program flow process of live news.
Embodiment two:
The present embodiment is the improvement of embodiment one, is that embodiment one is about " the automatically detecting " refinement in " step in mark replacement face ".The mode of " automatically detecting " described in the present embodiment comprises following sub-step:
Identify the sub-step of three-dimensional modeling data: identify the component data as the animation starting point and ending point of the three-dimensional model switched and virtual video camera the points of measurement certificate.
The sub-step of three-dimensional object mark: utilize position relationship relative between virtual video camera with three-dimensional object, determine the replacement face before and after two sections of video transitions.The method of three-dimensional object automatic mark refers to: in virtual video camera animation starting and ending position, by the spatial relation that video camera is relative with three-dimensional object, finds out two nearest target piece of distance video camera as replacement items.The mathematical derivation of mark sees below.
The sub-step that virtual video camera is corrected: utilize replacement face to correct virtual video camera parameter, to guarantee in animation starting and ending position, makes the full screen display of virtual video camera energy replace face.Virtual video camera automatic correction method refers to: in virtual video camera animation starting and ending position, and video camera in order to can the accurately face 1 of full screen display three-dimensional object, face 2, to rotate original animation and the parameter such as translation is corrected.This rectification is actually a kind of three-dimension varying: carry out three dimensional change by the geometry quantity of state that video camera is original and correct and obtain a new geometry quantity of state, to meet under new state, video camera can the accurately full screen display certain surface of three-dimensional object of specifying.The mathematical derivation that virtual video camera is corrected sees below.
The sub-step of record: the identification information in record replacement face, and the animation data that virtual video camera parameter is additional three-dimensional model secondary development corrected in record.
Embodiment three:
The present embodiment is the improvement of embodiment one, is the refinement of embodiment one about the mode of " the arranging alternately " in " step in mark replacement face ".The mode of " arranging alternately " described in the present embodiment comprises following sub-step:
Identify the sub-step of three-dimensional object data: for identifying the component data as the three-dimensional model switched.
The sub-step of interactive selection: choose replacement items arbitrarily in the three-dimensional model identified;
Optionally whether can correct virtual video camera afterwards, if select not correct, then directly carry out the step recorded, record the identification information of the three-dimensional object as the face of replacement.If select to correct, then carry out the step of virtual video camera correction: the three-dimension varying carried out in order to three-dimensional object that full screen display is specified for virtual video camera, makes virtual video camera energy full screen display replacement items; Carry out the step recorded afterwards, record the identification information of the three-dimensional object as the face of replacement, and the animation data that virtual video camera parameter is additional three-dimensional model secondary development corrected in record.
Because the present invention uses the transition of three-dimensional model process video, it had both comprised some concepts and the technological means of three-dimensional animation production, comprised again some concepts and the technological means of television video editing.Because television video editing and three-dimensional animation are that two technical systems are each other not too consistent under normal circumstances, are implemented for ease of this invention, make following explanation especially.
In television video editing field, namely the transition of two sections of videos is switched to video segment B by video segment A is a kind of very conventional stunt, and these two sections of videos are about to leave the spectators visual field due to A, are usually called " frame out ", B is about to enter the spectators visual field, is usually called " entering picture ".From the angle of video editing, three-dimensional transition, based on video segment, is that frame out A is substituted by three-dimensional transition model, after one section comprises or do not comprise the animation of video segment A, progressively transforms to the process of the video segment into picture B.From this angle, we can be described as video segment A and are substituted by certain face of the three-dimensional object in three-dimensional animation scene or three-dimensional object, progressively be transformed to another one face even certain face of another one three-dimensional body of this three-dimensional body, and this face is progressively transformed to video segment B.Here it is, and video editing process inediting personnel see finally realizes effect.
Simultaneously, in three-dimensional animation production field, can describe from another one angle completely from the eye of three-dimensional animation technician: made a three-dimensional scenic in advance, this three-dimensional scenic comprises at least one three-dimensional object, at least one light source, at least one virtual video camera.Three-dimensional object can be endowed texture mapping, and this texture mapping can be static images, also can be video segment.The basis of this three-dimensional scenic can be produced one section of three-dimensional animation, owing to being 3 D video transition needs, so the picture requiring animation to start, need certain face of certain three-dimensional body, specifically namely be endowed " frame out " video segment A that face as texture mapping, by virtual video camera full screen display; The picture simultaneously finally terminated at animation, needs will be endowed " entering picture " video segment B that face as texture mapping, by virtual video camera full screen display.
The animation that such final rendering goes out just can coupling together video segment A and video segment B smoothness, becomes to possess the video enriching artistic effect and switch stunt.
Here be above-mentioned virtual video camera correct relate to three-dimension varying, virtual video camera focusing, and the mathematical derivation of three-dimensional object automatic mark:
The mathematical derivation of three-dimension varying, meets meaning as shown in Figure 3:
Three-dimension varying: refer to the affined transformation under the three dimensions such as translation, rotation, convergent-divergent.This conversion is 4 × 4 matrixes, is designated as
.
To a three-dimensional point
p src carry out
mconversion can obtain a new three-dimensional point
p new , namely (
p src , 1) ×
m=(
p new , 1); To a three-dimensional vector
carry out
mconversion can obtain a new three-dimensional vector
, namely
.
The present embodiment adopts geometry quantity of state to describe three-dimensional element in three-dimensional position and orientation.
Be designated as
:
.
Wherein
posfor three-dimensional element position in space.
represent three-dimensional element direction, upwards, forward left respectively.
Three-dimension varying can be carried out between two geometry quantity of states
m, see Fig. 3.
If the initial geometry quantity of state of three-dimensional element is:
.Right
carry out three-dimension varying
manother geometry quantity of state Ω can be obtained.
If known
m, then each component of Ω meets:
1) evolution:
（0,0,0,1）×
M=（
Pos，1），
2) direction transformation:
If vectorial
.
（1）
normalizerefer to unitization to tri-vector.If
mdo not comprise scale transformation then to have:
Note: all scale transformation is not contained to the three-dimension varying of virtual video camera and virtual light source.
If known Ω, then
meach component meet:
（2）
The mathematical derivation of virtual video camera focusing, meets as shown in Figure 4:
Definition three-dimensional object
objectgeometry quantity of state
, the width of bounding box (three-dimensional object bounding box refers to the minimum rectangular parallelepiped comprising all summits of three-dimensional object)
widthand height
height.
Defining virtual video camera
camerageometry quantity of state
, horizontal subtended angle
m θ.
Work as virtual video camera
camerafocusing object
objecttime (see figure 4), spatially there is following relational expression:
Then have:
，
Formula (2) is utilized to calculate
camerafocusing conversion
m cameraFocus .
The mathematical derivation of mark is:
Given three-dimensional object
and virtual video camera
camera.
Object
object i geometry quantity of state be
.
Video camera
camerageometry quantity of state be
.
1) object is marked
object f .Searching drops on
camerain the cone, and nearest object:
A) from
in determine
location components
?
camerathe object sequence of view frustums inside
;
B) from
middle selection
?
the object that upper projected length is minimum
object i ;
B) determine in
object i be mark object
object f .
The mathematical derivation that virtual video camera is corrected is:
When
camerafocusing
object f , the mathematical derivation utilizing above-mentioned video camera to focus can calculate
camerafocusing transformation matrix
m cameraFocus .
If
cameraoriginal three-dimension varying matrix is
m camera , correct transformation matrix be
m cameraAdjust .These three transformation matrixs meet:
M CameraFocus =
M Camera ×
M CameraAdjust ；
Then:
。
Adopt said method to carry out marking and correcting in virtual video camera animation starting and ending position respectively, two rectification matrixes of object A, B and video camera can be obtained.Correct matrix to these two and carry out the video camera rectification matrix that interpolation can calculate transition frames, the transformation matrix that former to itself and video camera animation calculates is multiplied and just obtains final transformation matrix.The rectification to the whole animation process of virtual video camera can be realized in this way.
Finally it should be noted that, below only in order to technical scheme of the present invention to be described and unrestricted, although with reference to preferred arrangement scheme to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention (such as: the edit mode etc. of the selecting of the option of parameters, the sequencing of step, Storyboard, template) or equivalently to replace, and not departing from the spirit and scope of technical solution of the present invention.Method of the present invention can work out the program for being applied to computer system, and runs in computer network system of the present invention.
Claims (3)
1. one kind adopts the method for three-dimensional model process video transition, the system that described method uses comprises: be arranged on the image editor in server or server cluster, non-volume explorer, renderer, be provided with three-dimensional model construction unit in described image editor, this three-dimensional model construction unit is used for building three-dimensional object, virtual video camera, virtual light and making animation;
It is characterized in that, described method comprises builds the process of three-dimensional animation switching template and the process of three-dimensional animation switching:
The process that described structure three-dimensional animation switches template comprises the steps:
Obtain the step of three-dimensional model: import in image editor or build one as the three-dimensional model switched by three-dimensional model construction unit, and/or by three-dimensional model construction unit, secondary development being carried out to the three-dimensional model imported, three-dimensional model comprises three-dimensional object, virtual video camera, virtual light and animation thereof;
The step in mark replacement face: the replacement face of transition video is treated in two faces marking three-dimensional object by the mode of " automatically detect " or " arranging alternately " as two sections;
The step of storing template: using the identification information of the three-dimensional object in the replacement face of containing, the animation data of three-dimensional model as template stored in non-volume explorer;
The process that described three-dimensional animation switches comprises the steps:
Obtain the step of view data: obtain the sequence of video images before transition switching and the sequence of video images after switching;
Choose the step of template: the template choosing switching three-dimensional model at non-volume explorer, and obtain the identification information of the animation data of this three-dimensional model and the three-dimensional object as the face of replacement;
The step of replacing: find in handoff procedure the three-dimensional object comprising replacement face according to identification information, replaces with two sequence of video images before and after switching by the replacement face of its correspondence;
Play up and the step exported: each the frame scene image through described replacement step played up in handoff procedure by renderer, and export the scene image after playing up.
2. method according to claim 1, is characterized in that: the mode of " automatically detecting " in described " step in mark replacement face " comprises following sub-step:
Identify the sub-step of three-dimensional modeling data: identify the component data as the animation starting point and ending point of the three-dimensional model switched and virtual video camera the points of measurement certificate;
The sub-step of three-dimensional object mark: utilize position relationship relative between virtual video camera with three-dimensional object, determine the replacement face before and after two sections of video transitions;
The sub-step that virtual video camera is corrected: utilize replacement face to correct virtual video camera parameter, to guarantee in animation starting and ending position, makes the full screen display of virtual video camera energy replace face;
The sub-step of record: the identification information recording the three-dimensional object as the face of replacement, and the animation data that virtual video camera parameter is additional three-dimensional model secondary development corrected in record.
3. method according to claim 1, is characterized in that: the mode of " arranging alternately " in described " step in mark replacement face " comprises following sub-step:
Identify the sub-step of three-dimensional object data: identify the component data as the three-dimensional model switched;
The sub-step of interactive selection: choose two faces of replacement items as replacement face in the three-dimensional model identified;
Determine whether the sub-step of correcting camera: determine not correct, then directly enter next step " sub-step of record ";
Determine to correct, then enter next step " sub-step that virtual video camera is corrected ";
The sub-step that virtual video camera is corrected: utilize replacement face to correct virtual video camera parameter, to guarantee in animation starting and ending position, face is replaced in the full screen display of virtual video camera energy; Enter afterwards next step " sub-step of record ",
The sub-step of record: record the identification information as replacement items, the animation data that virtual video camera parameter is additional three-dimensional model secondary development corrected in record.
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