计算机图形学 ch6 visible surface(精品·公开课件).ppt

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计算机图形学 ch6 visible surface(精品·公开课件).ppt

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2012-10-30 北京林业大学 Computer Graphics Why to do it? Why to do it? How to do it? Visible-Surface Detection Methods Classification of Visible-Surface Detection Algorithm Visible-Surface Detection Methods Back-Face Detection Back-Face Detection Back-Face Detection Back-Face Detection Visible-Surface Detection Methods Depth－buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Depth Buffer Method Visible-Surface Detection Methods Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Scan-Line Method Visible-Surface Detection Methods Depth Sorting Method Depth Sorting Method Depth Sorting Method Depth Sorting Method Depth Sorting Depth overlaps checking Depth overlaps checking Depth Sorting Projection overlaps checking Projection overlaps checking Depth Sorting Further Checking for Projection Overlaps Further Checking for Projection Overlaps Depth Sorting Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Polygons Cyclically Overlap Each Other Depth Sorting Method An Example An Example An Example Depth Sorting Method Visible-Surface Detection Methods BSP Tree M