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## Software Engineering.

1. Object-Space Algorithms: algorithms that deal with the object definition directly visibility is decided by Line of surface by line or surface Back-Face Removal Depth Sorting (Painter Algorithm) Area Subdivision (Quadtrees and Octrees) Binary Space Partition Trees 2. Image-Space Methods algorithms that deal with the projected image.

Geometric Algorithms range search quad and kd trees intersection search VLSI rules check References: Algorithms in C (2nd edition), Chapters Hidden surface removal and shadow casting. Grid Quadtree kD tree BSP tree. 12 Sweep-line algorithm: Simulate the sweep line. Overview Hidden Surface removal Painter’s algorithm Z-buﬀer BSP tree Portal culling Back face culling Transparency Alpha blending Screen door transparencyMissing: hidden line. Feb 01, Edge Intersection To determine the visibility of partially invisible edges.

Calculate line intersections to determine edge visibility. y = y1 + m (xboundary - x1) x = x1 + (yboundary - y1) / m m = (y2 - y1) / (x2 - x1) Segment Comparison (Scan Line) Utilizes the image’s raster shrubremoval.barg: quad tree.

Hidden surface removal (HSR) and its algorithms. In 3D computer graphics, hidden surface determination (also known as hidden surface removal (HSR), occlusion culling (OC) or visible surface determination (VSD)) is the process used to determine which surfaces and parts of surfaces are not visible from a certain shrubremoval.barg: quad tree.

Check Line P1P2: (1) If P 1 P 2 is completely inside, accept it; if P 1 P 2 is completely outside, reject it; otherwise go to step 2; (2) Find an end point P 1 (or P 2) of lineP 1 P 2 outside of region; (3) Find the intersection point P’ 1 to replace P 1 (or P 2) (4) If P 1 P 2 is completely inside, then accept this line, else go to step 2.

AlgorithmMissing: quad tree. Dimensional Graphics and Realism - Hidden line/surface removal; I [Computer Graphics]: Picture/Image Gener-ation.

### Easy to implement.

tiling, coverage mask, antialiasing, visibility, BSP tree, octree, recursive subdivision. Polygon tiling algorithms have been an important topic in computer image synthesis since the advent of raster graph-ics some two decades ago. The types of hidden surface removal algorithm are: a. Depth comparison, Z-buffer, back-face removal: b. Scan line algorithm, priority algorithm: c.

BSP method, area subdivision method: d. All of these.