Hidden Surface Removal

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Presentation transcript:

Hidden Surface Removal In the projection process we project all the faces into the view plane Some of the faces should not appear in the final images It is mandatory to remove these invisible surfaces.

View Frustum Culling

Back and Front Facing

Front-to-Back Traversal Order the object in scene from near to far Traverse the objects starting from the objects close to the viewer Maintain a map of the visible/hidden regions Avoid traversing hidden regions

Back-to-Front Traversal Order the object in scene from far to near Traverse the objects starting from the objects far from the viewer Project the object in the order of the traversal.

Z-Buffer A hardware supported Hidden Surface removal approach

Z-Buffer

Depth Buffer