| 摘要 |
PROBLEM TO BE SOLVED: To draw CAD data at a high speed. SOLUTION: The processing time necessary for developing the CAD data to images is stored as an image complexity degree by each of the partial regions of the CAD data in an image complexity degree memory section 31 and the images formed by reducing the CAD data at a suitable magnification after developing the CAD data are stored into a reduced image memory section 33. An image drawing means 22 compares the stored image complexity degree and the threshold and executes drawing processing by selecting whether the image is developed from the CAD data stored in the CAD data memory section 32 and is drawn or the necessary image is extracted from the stored reduced images and is drawn. |
