Lecture_Chapter6_b

Scene graphs house room 1 bed room 2 chair 1 table

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Unformatted text preview: raction 31 Spatial Hierarchies and Scene Graphs •  Scene graphs can correspond to spatial hierarchies in the scene House Room 1 Bed ECS 175 Room 2 Chair 1 Table Chapter 6: Scene Representation and Interaction Char 2 32 Spatial Hierarchies and Scene Graphs House Room 1 Bed Room 2 Chair 1 Table Char 2 •  Combining this hierarchy with spatial subdivision or spatial partitioning can greatly improve rendering performance •  This is because our camera can be located inside the scene. ECS 175 Chapter 6: Scene Representation and Interaction 33 Spatial Hierarchies •  Spatial Partitioning techniques can be combined with scene graphs to perform efficient visibility testing passing the complete scene to the graphics card is inefficient ECS 175 make use of spatial relationships and perform pre-selection/rejection Chapter 6: Scene Representation and Interaction 34 Spatial Hierarchies •  Spatial Partitioning techniques can •  Be combined with general scene graphs •  Perform early rejection of objects •  Reduce workload for graphics pipeline (transformation, clipping,…) •  Reduce memory requirements (do not load invisible parts) •  Adapt to scene properties/requirements •  Be...
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This document was uploaded on 03/12/2014 for the course ECS 175 at UC Davis.

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