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Ray-cast image of idealized universal joint with shadow. Ray casting is the methodological basis for 3D CAD/CAM solid modeling and image rendering. It is essentially the same as ray tracing for computer graphics where virtual light rays are "cast" or "traced" on their path from the focal point of a camera through each pixel in the camera sensor to determine what is visible along the ray in the ...
Enclosing groups of objects in sets of bounding volume hierarchies (BVH) decreases the amount of computations required for ray tracing. A cast ray is first tested for an intersection with the bounding volume , and then if there is an intersection, the volume is recursively divided until the ray hits the object.
Bounding volumes such as Oriented Bounding Boxes (OBB), K-DOPs and Convex-hulls offer a tighter approximation of the enclosed shape at the expense of a more elaborate intersection test. Bounding volumes are typically used in the early (pruning) stage of collision detection, so that only objects with overlapping bounding volumes need be compared ...
Autodesk Revit is a building information modeling software for architects, structural engineers, mechanical, electrical, and plumbing (MEP) engineers, and contractors. The original software was developed by Charles River Software, founded in 1997, renamed Revit Technology Corporation in 2000 and acquired by Autodesk in 2002.
Added algorithm constructing OBB (oriented bounding box). Optimized surface intersection, shape offset and Boolean operation algorithms. Added distance and size culling rendering features. Added support of UNICODE filenames with MinGW-w64. Open CASCADE Technology 7.2 2017-08-31 — — Added support of OCAF binary files larger than 2 GiB.
An example of a bounding volume hierarchy using rectangles as bounding volumes. A bounding volume hierarchy (BVH) is a tree structure on a set of geometric objects. All geometric objects, which form the leaf nodes of the tree, are wrapped in bounding volumes. These nodes are then grouped as small sets and enclosed within larger bounding volumes.