WO2009145155A1 - 切削加工シミュレーション表示装置、切削加工シミュレーション表示方法、および切削加工シミュレーション表示プログラム - Google Patents
切削加工シミュレーション表示装置、切削加工シミュレーション表示方法、および切削加工シミュレーション表示プログラム Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
- G05B19/4069—Simulating machining process on screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/06—Ray-tracing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/08—Volume rendering
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35145—Voxel map, 3-D grid map
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35318—3-D display of workpiece, workspace, tool track
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35335—Update display image only if tool advanced over a defined distance
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37074—Projection device, monitor, track tool, workpiece form, process on display
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45044—Cutting
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2219/00—Indexing scheme for manipulating 3D models or images for computer graphics
- G06T2219/20—Indexing scheme for editing of 3D models
- G06T2219/2021—Shape modification
Definitions
- a cutting simulation that simulates a change in the shape of a workpiece due to cutting on a computer
- a cutting simulation display device In a cutting simulation that simulates a change in the shape of a workpiece due to cutting on a computer, a cutting simulation display device, a cutting simulation display method, and a cutting process that display the shape of the workpiece every moment along with the tool shape at that time on the screen
- the present invention relates to a simulation display program.
- the cutting simulation that simulates the workpiece shape change on a computer efficiently processes the workpiece shape change, and displays the workpiece shape on the screen every moment at high speed.
- the shape is represented by a set of minute cubes or columns called cells as the workpiece shape expression format. Voxel models and dexel models are often used.
- Patent Document 1 shape data obtained by converting a solid model of a workpiece into a dexel model is used. Under that, the drawing shape when the tool moves along the movement path is calculated, the wedge shape and the cylindrical shape that make up this drawing shape are calculated, and each lower surface is made polygonal and depth buffer processing is possible An intermediate image subjected to hidden surface removal processing is generated using such three-dimensional graphics hardware. At this time, the upper end of the dexel is cut off with the depth value recorded in the depth buffer, the upper end of the dexel is polygonalized, and a final image is generated and displayed on the screen using the 3D graphics hardware.
- Patent Document 1 Japanese Patent No. 3571564
- a method of obtaining a hidden surface-erased image by using a depth buffer process and polygonizing a display object as seen in the prior art is generally called a polygon drawing method. If a voxel model or dexel model is used for the shape representation format, the data structure is simplified and internal shape processing becomes efficient, while polygons equivalent to the number of cells that make up the model are drawn. It takes. For this reason, such polygon drawing methods are often predicated on the use of three-dimensional graphics hardware as in the prior art. However, there are many cases where high-end three-dimensional graphics hardware cannot be used with relatively inexpensive computers that are often found in processing sites.
- the present invention has been made in view of the above, and it is possible to reduce the amount of calculation required for ray tracing, and it is possible to reduce the shape of a workpiece even in an inexpensive computer having no three-dimensional graphics hardware and low calculation capability. It is an object of the present invention to provide a cutting simulation display apparatus, a cutting simulation display method, and a cutting simulation display program that can easily simulate changes.
- the cutting simulation display apparatus of the present invention expresses the shape of a workpiece by a voxel model and simulates the shape change of the workpiece by cutting on a computer.
- the workpiece drawing image buffer and the workpiece drawing depth buffer that hold the projection drawing image data and the depth distance data of the workpiece are managed, and the drawing area corresponding to the shape change portion of the workpiece is used with the ray tracing method.
- the work drawing update unit that updates corresponding parts of the work drawing image buffer and the work drawing depth buffer
- Tool drawing area A tool drawing image generation unit that generates a tool drawing image using the line tracking method, and transfers a partial image from the work drawing image buffer to the display frame buffer for the previous tool drawing area and the current work drawing update area.
- an image transfer unit that transfers the tool drawing image to the display frame buffer.
- the work drawing update unit is characterized in that ray tracing is started from a point determined from the depth distance before update and the ray tracing target pixel coordinates.
- the process of restoring the area where the tool was previously drawn and updating the display of the part where the shape has changed in the work is separated from the process of updating the display of the current tool drawing part.
- the region portion that needs to generate a drawing image using the ray tracing method is minimized.
- the drawing area corresponding to the shape change part of the work is drawn using the ray tracing method and the drawing image buffer.
- ray tracing is started from a point determined from the depth distance before updating and the ray tracing target pixel coordinates.
- the process of generating an image to be displayed on the screen is divided into two processes, that is, a ray tracing process for a work and a ray tracing process for a tool. Processing can be performed, and the amount of calculation can be reduced. In addition, the number of executions of ray tracing for the pixels that need to be updated from the previous display is reduced, and the total amount of computation is reduced, enabling cutting simulations to be executed even on an inexpensive computer with low calculation capability. Become.
- ray tracing starts from a point determined from the depth distance before update and the ray tracking target pixel coordinates, so unnecessary intersection determination processing between cells and rays is omitted, and the number of cell intersection determinations Is reduced, and the amount of computation per update tracking process is reduced, so that a cutting simulation can be executed even on an inexpensive computer having a low calculation capability.
- FIG. 1 is an overall configuration diagram of an embodiment of a cutting simulation display device according to the present invention.
- FIG. 2A is a diagram for explaining a display method of the voxel model by the ray tracing method. A ray is projected in the line-of-sight direction from each pixel on the projection surface, and color information at the intersection point with the object surface is obtained. It is a figure which shows a mode that a display image is obtained by calculating.
- FIG. 2-2 is a diagram for explaining a display method of the voxel model by the ray tracing method, and is a diagram showing a state in which the intersection determination is performed while sequentially tracing the cells in the way until the ray reaches the object surface. is there.
- FIG. 1 is an overall configuration diagram of an embodiment of a cutting simulation display device according to the present invention.
- FIG. 2A is a diagram for explaining a display method of the voxel model by the ray tracing method. A ray is projected in the
- FIG. 3 is a diagram showing an example of the screen display update in the embodiment of the cutting simulation display device according to the present invention.
- FIG. 4A is a diagram for explaining the basic principle of the ray tracing process in the work drawing update unit, and is a diagram illustrating the processing result of the ray tracing process in the previous screen display update.
- FIG. 4B is a diagram for explaining the basic principle of the ray tracing process in the work drawing update unit, and shows the state of the ray tracing process in the current screen display update.
- FIG. 5 is a flowchart illustrating the flow of ray tracing processing in the work drawing update unit.
- FIG. 6 is a flowchart illustrating the flow of ray tracing processing in the tool drawing image generation unit.
- FIG. 1 is an overall configuration diagram of an embodiment of a cutting simulation display apparatus according to the present invention.
- the cutting simulation display device is large and includes a simulation core unit 10 and a simulation display unit 20.
- the simulation core unit 10 represents a workpiece shape by a voxel model and simulates a workpiece shape change due to cutting.
- the simulation display unit 20 displays a workpiece shape that changes from moment to moment on the screen.
- the simulation core unit 10 includes workpiece shape data 11 expressed by a voxel model stored in the storage unit of the device, and tool path data 12 including information on the tool shape and the tool movement trajectory stored in the storage unit of the device. And a cutting simulation unit 13 that updates the workpiece shape data 11 based on the tool path data 12.
- the simulation display unit 20 includes a projection parameter 21 such as a line-of-sight direction and illumination conditions for drawing a workpiece and a tool, a work drawing image buffer 22 that holds an image obtained by projecting and drawing a single workpiece along the line-of-sight direction, A workpiece drawing depth buffer 23 that holds the depth distance from the projection surface to the workpiece surface for each pixel when a workpiece is projected and drawn along the line-of-sight direction, and a drawing image of the workpiece and tool is held on a screen such as a CRT.
- a projection parameter 21 such as a line-of-sight direction and illumination conditions for drawing a workpiece and a tool
- a work drawing image buffer 22 that holds an image obtained by projecting and drawing a single workpiece along the line-of-sight direction
- a workpiece drawing depth buffer 23 that holds the depth distance from the projection surface to the workpiece surface for each pixel when a workpiece is projected and drawn along the line-of-sight direction
- Screen display frame buffer 24 for displaying, drawing update area management data 25 for managing area information that needs to be updated for work drawing image buffer 22 and work drawing depth buffer 23, and work shape data using ray tracing method (Voxel) 11 to work drawing image buffer 22
- a workpiece drawing update unit 26 for recalculating data in the workpiece drawing depth buffer 23
- tool drawing region management data 27 for managing a region in which a tool is drawn at the time of the previous display update
- Tool drawing image generation unit 28 that generates a projected drawing image near the tool using the ray tracing method based on the end point of the tool, that is, the current tool position, and image data and tool drawing image generation unit of the update target area of the work drawing image buffer 22
- the image transfer unit 29 is configured to transfer the tool drawing image generated by the image display frame buffer 24 to the screen display frame buffer 24.
- the drawing update area management data 25 is represented by the coordinates of the two diagonal vertices of the update target area, and is initialized to be the entire display screen at the start of the simulation.
- the workpiece shape data 11 is the material shape of the workpiece before machining.
- the work drawing update unit 26 calculates and initializes both data of the work drawing image buffer 22 and the work drawing depth buffer 23 using the ray tracing method for the entire display area. Further, the image transfer unit 29 transfers all area data of the work drawing image buffer 22 to the screen display frame buffer 24. When the initial display is thus completed, the drawing update area management data 25 is cleared to an empty state.
- FIG. 3 shows a typical example in which the screen display is updated during the execution of the simulation.
- 301 indicates the display content before display update, that is, the previous display content
- 304 indicates the display content of the current display update result.
- 306 indicated by a broken line in the drawing is a drawing area corresponding to a part where the shape of the workpiece 302 has changed
- 307 is an area where the tool 303 before the movement was drawn last time
- 308 is a drawing of the tool 305 after the movement this time. It is an area to do.
- it is necessary to update related data so that at least the areas 306 to 307 have the latest display contents.
- the cutting simulation unit 13 reads the tool shape information and the movement trajectory information for one step from the tool path data 12, simulates the cutting processing corresponding to the tool movement, and updates the workpiece shape data 11 based on the result.
- the simulation of the cutting process is realized, for example, by performing a Boolean difference calculation on the workpiece shape data 11 by subtracting the tool sweep shape obtained by sweeping the tool shape along the movement locus from the workpiece shape.
- the cutting simulation unit 13 sends the three-dimensional region data changed by the cutting process to the workpiece drawing update unit 26.
- the three-dimensional area data is a three-dimensional inclusion box surrounding the changed part of the workpiece shape.
- the workpiece drawing update unit 26 calculates a two-dimensional update region obtained by projecting the received three-dimensional region data with the projection parameter 21, and updates the drawing update region management data 25.
- the work drawing update unit 26 calculates the pixel data (RBG value) and the depth distance using the ray tracing method for the pixels included in the update target area in the drawing update area management data 25, and the work drawing image buffer 22. Then, the work drawing depth buffer 23 is updated.
- FIGS. 4A and 4B are cross-sectional views for explaining the basic principle of the ray tracing process in the work drawing update unit 26, as viewed from the side.
- FIG. 4A is a processing result of the ray tracing process in the previous screen display update.
- the distance w) 403 is calculated, and this depth distance 403 is recorded in the work drawing depth buffer 23.
- FIG. 4-2 shows the state of the ray tracing process in the current screen display update.
- a point (ray tracing start point P) 406 that is a depth distance 403 from the target pixel 402 is the starting point of this ray tracing.
- Ray tracing start point 406 is the surface of the workpiece shape at the time of the previous screen display update, but has changed from workpiece shape 404 in FIG. 4-1 to workpiece shape 405 in FIG. 4-2 by cutting. In this case, the newly appearing shape surface is always located on the far side in the line-of-sight direction (see the light ray (light ray L) 407 in FIG. 4-2). Therefore, a correct drawing result can be obtained even if ray tracing is started from the point 406.
- FIG. 5 is a flowchart showing the operation of the ray tracing process in the work drawing update unit 26.
- the reference numerals in the flowchart are used in the basic model in the ray tracing process (see FIGS. 4-1 and 4-2).
- the work drawing update unit 26 first reads the depth distance w at the target pixel position from the work drawing depth buffer 23 in step S101.
- step S102 the three-dimensional coordinate point P :() obtained by converting the three-dimensional coordinate point q: (u, v, w) obtained by combining the pixel coordinate (u, v) and the depth distance w into the coordinate system of the workpiece shape data.
- step S103 a half line L in the depth direction perpendicular to the projection plane with the point P as the starting point is calculated as ray data.
- step S104 the cell C including the point P is searched for in the voxel model that is the work shape data.
- Step S105 it is determined whether or not the light beam L intersects the surface of the workpiece shape inside the cell of interest C. When intersecting, the process goes through the loop and proceeds to step S108. If not intersecting, it is determined in step S106 whether or not there is an adjacent cell through the boundary surface intersecting with the light ray L among the six boundary surfaces of the target cell C. If there is an adjacent cell, in step S107, the adjacent cell is set as a new target cell C, and the process returns to step S105. If there is no adjacent cell, the process proceeds to step S111.
- Steps S108 to S110 are processes when the light ray L intersects the surface of the work shape inside the cell of interest C, and the intersection point X is calculated in step S108.
- step S109 pixel data (RGB luminances) is calculated based on the normal vector of the workpiece shape at the intersection X and the illumination condition of the projection parameter 21, and stored in the corresponding position of the workpiece drawing image buffer 22.
- step S110 the distance (depth distance) from the projection plane to the intersection point X is calculated and stored in the corresponding position of the work drawing depth buffer 23, and the ray tracing process is completed.
- Step S111 is processing when the light ray L and the work shape do not cross each other and pass through the entire voxel model.
- a predetermined background color is stored at a corresponding position in the work drawing image buffer 22, and a sufficiently large value is stored. Is stored in the corresponding position of the work drawing depth buffer 23.
- the workpiece drawing image buffer 22 and the workpiece drawing depth buffer 23 are configured to store drawing image data and depth distance data in the workpiece shape to be cut. Data obtained by synthesizing the projected drawing image and depth distance data calculated for another object whose relative position with the workpiece does not change during the simulation may be stored.
- the tool drawing image generation unit 28 when the update of the corresponding data in the work drawing image buffer 22 and the work drawing depth buffer 23 is completed for all the pixels to be updated by the ray tracing process described above, the projected drawing image near the tool. Is generated. Even in this processing, image generation is performed using the ray tracing method.
- the tool drawing image generation target area is a projection parameter 21 that represents a three-dimensional comprehensive box surrounding the tool shape at the current position from the tool shape information held in the tool path data 12 and the current tool position (end point of the movement trajectory). It becomes a projected two-dimensional area.
- An image is generated using a ray tracing method for the pixels included in the two-dimensional region.
- FIG. 6 is a flowchart showing the operation of the ray tracing process in the tool drawing image generation unit 28.
- the reference numerals in the flowchart are used in the basic model in the ray tracing process (see FIGS. 4-1 and 4-2).
- the tool drawing image generation unit 28 first calculates, in step S ⁇ b> 201, a half line L in the depth direction perpendicular to the projection plane from the processing target pixel as ray data.
- step S202 it is determined whether or not the light beam L intersects the tool-shaped surface. If it intersects, the process proceeds to step S203.
- step S203 an intersection point X between the light beam L and the tool-shaped surface is calculated.
- step S204 the depth distance d from the projection plane to the intersection X is calculated.
- step S205 the depth distance w corresponding to the target pixel is read from the work drawing depth buffer 23.
- step S206 the depth distances d and w are compared.
- Step S207 is processing when d ⁇ w in Step S206, that is, the tool shape is in front of the workpiece shape, and the pixel data based on the normal vector of the tool shape at the intersection X and the illumination condition of the projection parameter 21 (Each RGB brightness) is calculated and used as pixel data of the tool drawing image.
- Step S208 is a process when the light beam L does not intersect with the surface of the tool shape in Step S202, or when d ⁇ w, that is, the tool shape is behind the work shape in Step S206.
- the pixel data corresponding to the target pixel is read out from the pixel 22 and used as the pixel data of the tool drawing image.
- the image transfer unit 29 transfers the partial image data in the work drawing image buffer 22 and the tool drawing image data generated by the tool drawing image generation unit 28 to the screen display frame buffer 24.
- the partial image data of the corresponding areas is first read from the work drawing image buffer 22. Read and transfer to the screen display frame buffer 24. Subsequently, the tool drawing image data generated by the tool drawing image generation unit 28 is transferred to the screen display frame buffer 24. When the image transfer to the screen display frame buffer 24 is completed, the image transfer unit 29 clears the drawing update area management data 25 and sets the area of the current tool drawing image in the tool drawing area management data 27. .
- the generation process of the image to be displayed on the screen is divided into the two processes of the ray tracing process for the work and the ray tracing process for the tool, so that the update is truly performed.
- Ray tracing processing can be performed only for necessary areas, and the amount of calculation can be reduced.
- by dividing the ray tracing process for the work and the tool as described above it is possible to perform an appropriate ray tracing process suitable for each.
- an unnecessary intersection determination process between the cell and the ray is omitted by using the previously obtained distance depth, so that the calculation amount can be suppressed.
- the cutting simulation display device is configured to include a workpiece drawing update unit 26 that performs a ray tracing process on a workpiece and a tool drawing image generation unit 28 that performs a ray tracing process on a tool. Further, it is possible to adopt a form in which drawing update is performed only for a change in the shape of the workpiece without having the tool drawing image generation unit 28. In this case, there is no need for a tool drawing image generation process and an image transfer process for the tool drawing area, and the amount of calculation can be further suppressed.
- the cutting simulation system in the cutting simulation in which the shape of the workpiece is expressed by the voxel model and the change in the shape of the workpiece due to the cutting is simulated on the computer, the calculation amount is small. Since the simulation can be performed, the cutting simulation can be realized even on an inexpensive computer with low calculation capability.
- the present invention is useful when applied to a simulation in which the shape of an object is expressed by a voxel model and simulated on a computer.
- the present invention is based on the relative motion between a tool and a workpiece created by cutting. It is suitable for cutting simulation that simulates the shape change of the workpiece on the computer with the complicated machining surface determined.
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Abstract
Description
図1は、本発明にかかる切削加工シミュレーション表示装置の実施の形態の全体構成図である。図1において、切削加工シミュレーション表示装置は、大きく、シミュレーションコア部10とシミュレーション表示部20とを有している。シミュレーションコア部10は、ワーク形状をボクセルモデルで表現し切削加工によるワークの形状変化を模擬する。シミュレーション表示部20は時々刻々変化するワーク形状を画面に表示する。
また、描画更新領域管理データ25は、更新対象領域の対角2頂点の座標で表し、シミュレーション開始時点では表示画面全体となるように初期化されている。
図5は、ワーク描画更新部26での光線追跡処理の動作を示したフローチャートである。なお、フローチャート中の符号は光線追跡処理における基本的モデルで使用するものである(図4-1及び図4-2参照)。図5において、ワーク描画更新部26は、まず、ステップS101で、着目画素位置でのデプス距離wをワーク描画デプスバッファ23から読み出す。次に、ステップS102で、画素座標(u、v)とデプス距離wを合成した3次元座標点q:(u、v、w)をワーク形状データの座標系に変換した3次元座標P:(x、y、z)を求める。続くステップS103で、点Pを始点とし投影面に垂直奥行き方向の半直線Lを光線データとして算出する。ステップS104では、ワーク形状データであるボクセルモデルにおいて点Pを含むセルCを探索する。
図6は、工具描画イメージ生成部28での光線追跡処理の動作を示したフローチャートである。なお、フローチャート中の符号は光線追跡処理における基本的モデルで使用するものである(図4-1及び図4-2参照)。図6において、工具描画イメージ生成部28は、まず、ステップS201で、処理対象画素を始点とし投影面に垂直奥行き方向の半直線Lを光線データとして算出する。次に、ステップS202で、光線Lが工具形状の表面と交差するか否かを判定する。交差する場合はステップS203に進む。ステップS203では、光線Lと工具形状の表面との交点Xを算出する。続くステップS204で、投影面から交点Xまでのデプス距離dを算出する。次に、ステップS205で、ワーク描画デプスバッファ23から着目画素に対応するデプス距離wを読み出す。ステップS206にて、デプス距離dとwとを比較する。
11 ボクセルモデルで表現されたワーク形状データ
12 工具形状情報と工具経路情報からなる工具パスデータ
13 切削模擬部
20 シミュレーション表示部
21 投影パラメータ
22 ワーク描画イメージバッファ
23 ワーク描画デプスバッファ
24 画面表示フレームバッファ
25 描画更新領域管理データ
26 ワーク描画更新部
27 工具描画領域管理データ
28 工具描画イメージ生成部
29 イメージ転送部
201 投影面
202 鉱泉追跡の対象画素
203 光線
204 ボクセルモデル
205 光線と物体の交点
206 光線途上にあるセル
301 前回の描画
302 ワーク
303 移動前の工具
304 今回の描画
305 移動後の工具
306 ワーク形状が変化した領域
307 前回の工具が描画されていた領域
308 今回の工具を描画する領域
401 投影面
402 画素
403 デプス距離
404,405 ワーク形状
406 光線追跡の開始点
407 光線
Claims (12)
- ワークの形状をボクセルモデルで表現し、切削加工によるワークの形状変化を模擬する切削加工シミュレーション表示装置において、
ワークの投影描画のイメージデータおよびデプス距離データを保持するワーク描画イメージバッファおよびワーク描画デプスバッファを管理し、ワークの形状変化部分に対応する描画領域について、光線追跡法を用いて、前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファの対応部分を更新するワーク描画更新部を備え、
前記ワーク描画更新部は、更新前のデプス距離と光線追跡対象ピクセル座標から決まる地点から光線追跡を開始する
ことを特徴とする切削加工シミュレーション表示装置。 - ワークの形状をボクセルモデルで表現し、切削加工によるワークの形状変化を模擬する切削加工シミュレーション表示装置において、
ワークの投影描画のイメージデータおよびデプス距離データを保持するワーク描画イメージバッファおよびワーク描画デプスバッファを管理し、ワークの形状変化部分に対応する描画領域について、光線追跡法を用いて、前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファの対応部分を更新するワーク描画更新部と、
前記ワーク描画更新部により更新された前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファを参照して、今回の工具描画領域について光線追跡法を用いて工具描画イメージを生成する工具描画イメージ生成部と、
前回の工具描画領域と今回のワーク描画更新領域についてワーク描画イメージバッファから部分イメージを表示フレームバッファに転送するとともに、今回の工具描画イメージを表示フレームバッファに転送するイメージ転送部と
を備えたことを特徴とする切削加工シミュレーション表示装置。 - 前記ワーク描画更新部は、更新前のデプス距離と光線追跡対象ピクセル座標から決まる地点から光線追跡を開始する
ことを特徴とする請求項2に記載の切削加工シミュレーション表示装置。 - 前記ワーク描画更新部は、前回に工具が描画されていた領域の復旧及びワークの形状変化部分に対応する領域の更新を行い、
前記工具描画イメージ生成部は、今回の工具描画領域の更新を行う
ことを特徴とする請求項2または3に記載の切削加工シミュレーション表示装置。 - ワークの形状をボクセルモデルで表現し、切削加工によるワークの形状変化をコンピュータ上で模擬する切削加工シミュレーション表示方法において、
ワークの投影描画のイメージデータおよびデプス距離データを保持するワーク描画イメージバッファおよびワーク描画デプスバッファを管理し、ワークの形状変化部分に対応する描画領域について、光線追跡法を用いて、前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファの対応部分を更新するワーク描画更新工程を含み、
前記ワーク描画更新工程は、更新前のデプス距離と光線追跡対象ピクセル座標から決まる地点から光線追跡を開始する
ことを特徴とする切削加工シミュレーション表示方法。 - ワークの形状をボクセルモデルで表現し、切削加工によるワークの形状変化をコンピュータ上で模擬する切削加工シミュレーション表示方法において、
ワークの投影描画のイメージデータおよびデプス距離データを保持するワーク描画イメージバッファおよびワーク描画デプスバッファを管理し、ワークの形状変化部分に対応する描画領域について、光線追跡法を用いて、前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファの対応部分を更新するワーク描画更新工程と、
前記ワーク描画更新工程により更新された前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファを参照して、今回の工具描画領域について光線追跡法を用いて工具描画イメージを生成する工具描画イメージ生成工程と、
前回の工具描画領域と今回のワーク描画更新領域についてワーク描画イメージバッファから部分イメージを表示フレームバッファに転送するとともに、今回の工具描画イメージを表示フレームバッファに転送するイメージ転送工程と
を含むことを特徴とする切削加工シミュレーション表示方法。 - 前記ワーク描画更新工程は、更新前のデプス距離と光線追跡対象ピクセル座標から決まる地点から光線追跡を開始する
ことを特徴とする請求項6に記載の切削加工シミュレーション表示方法。 - 前記ワーク描画更新工程は、前回に工具が描画されていた領域の復旧及びワークの形状変化部分に対応する領域の更新を行い、
前記工具描画イメージ生成工程は、今回の工具描画領域の更新を行う
ことを特徴とする請求項6または7に記載の切削加工シミュレーション表示方法。 - コンピュータ上で実行することにより、切削加工によるワークの形状変化をワークの形状をボクセルモデルで表現して模擬する切削加工シミュレーション表示プログラムにおいて、
ワークの投影描画のイメージデータおよびデプス距離データを保持するワーク描画イメージバッファおよびワーク描画デプスバッファを管理し、ワークの形状変化部分に対応する描画領域について、光線追跡法を用いて、前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファの対応部分を更新するワーク描画更新手順を含み、
前記ワーク描画更新手順は、更新前のデプス距離と光線追跡対象ピクセル座標から決まる地点から光線追跡を開始する
ことを特徴とする切削加工シミュレーション表示プログラム。 - コンピュータ上で実行することにより、切削加工によるワークの形状変化をワークの形状をボクセルモデルで表現して模擬する切削加工シミュレーション表示プログラムにおいて、
ワークの投影描画のイメージデータおよびデプス距離データを保持するワーク描画イメージバッファおよびワーク描画デプスバッファを管理し、ワークの形状変化部分に対応する描画領域について、光線追跡法を用いて、前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファの対応部分を更新するワーク描画更新手順と、
前記ワーク描画更新手順により更新された前記ワーク描画イメージバッファおよび前記ワーク描画デプスバッファを参照して、今回の工具描画領域について光線追跡法を用いて工具描画イメージを生成する工具描画イメージ生成手順と、
前回の工具描画領域と今回のワーク描画更新領域についてワーク描画イメージバッファから部分イメージを表示フレームバッファに転送するとともに、今回の工具描画イメージを表示フレームバッファに転送するイメージ転送手順と
を含むことを特徴とする切削加工シミュレーション表示プログラム。 - 前記ワーク描画更新手順は、更新前のデプス距離と光線追跡対象ピクセル座標から決まる地点から光線追跡を開始する
ことを特徴とする請求項10に記載の切削加工シミュレーション表示プログラム。 - 前記ワーク描画更新手順は、前回に工具が描画されていた領域の復旧及びワークの形状変化部分に対応する領域の更新を行い、
前記工具描画イメージ生成手順は、今回の工具描画領域の更新を行う
ことを特徴とする請求項10または11に記載の切削加工シミュレーション表示プログラム。
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