Device for displaying cutting simulation, method for displaying cutting simulation, and program for displaying cutting simulation

A device for displaying a cutting simulation for representing a shape of a workpiece in a voxel model to simulate a change in the shape of the workpiece by a cutting operation, the device comprising:

• a rendered workpiece image update section for managing a rendered workpiece image buffer and a rendered workpiece depth buffer to hold image data and depth distance data of a projected image of the workpiece and updating by ray tracing a portion in the rendered workpiece image buffer and the rendered workpiece depth buffer, the portion being associated with a rendering region corresponding to a change in the shape of the workpiece;
• a rendered tool image creation section for creating a rendered tool image by ray tracing for a current tool rendering region with reference to the rendered workpiece image buffer and the rendered workpiece depth buffer updated by the rendered workpiece image update section;
• and
• an image transfer section for transferring a partial image of the previous tool rendering region and the current workpiece rendering region to be updated from the rendered workpiece image buffer to a display frame buffer as well as transferring a current rendered tool image to the display frame buffer.

A method for displaying a cutting simulation for representing a shape of a workpiece in a voxel model to simulate a change in the shape of the workpiece by a cutting operation, the method comprising:

• a rendered workpiece image update step of managing a rendered workpiece image buffer and a rendered workpiece depth buffer to hold image data and depth distance data of a projected image of the workpiece and updating by ray tracing a portion in the rendered workpiece image buffer and the rendered workpiece depth buffer, the portion being associated with a rendering region corresponding to a change in the shape of the workpiece;
• a rendered tool image creation step of creating a rendered tool image by ray tracing for a current tool rendering region with reference to the rendered workpiece image buffer and the rendered workpiece depth buffer updated in the rendered workpiece image update step;
• and
• an image transfer step of transferring a partial image of the previous tool rendering region and the current workpiece rendering region to be updated from the rendered workpiece image buffer to a display frame buffer as well as transferring a current rendered tool image to the display frame buffer.