Ray casting for modeling solids - ScienceDirect
Feb 1, 1982 · This paper presents ray casting as the methodological basis for a CAD/CAM solid modeling system. Solid objects are modeled by combining primitive solids, such as blocks and cylinders, using the set operators union, intersection, and difference.
Ray casting - Wikipedia
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 3D scene.
Ray casting for modeling solids - Semantic Scholar
Real-time ray tracing provides an alternative to triangle rasterization as it allows for the direct visualization of (higher-order) solid and planar primitives without having to triangulate them, and Boolean compositing operations can be performed implicitly per ray.
Nvidia Announces OptiX, a API for real-time ray tracing on Nvidia GPUs. •Used in AfterEffects, Bunkspeed shot, Autodesk Maya, 3ds max, etc. SIGGRAPH 2019 Nvidia offers hardware-accelerated ray tracing on RTX series Turing architecture GPUs •RT Core (BVH Traversal, BVH Node Decompression, ray-AABB intersection, and ray-triangle intersection)
Ray tracing can be applied to render solids represented by CSG trees. However, unlike ray tracing for surface models where only isolated intersection points are computed, ray tracing for solid models proceeds by finding the parameter intervals for which each line lies inside the solid. We need these parameter intervals for two reasons.
Ray Casting •Simple implementation: Image RayCast(Scene scene, int width, int height) {Image image = new Image(width, height); for (int i = 0; i < width; i++) { for (int j = 0; j < height; j++) { Ray ray = ConstructRayThroughPixel (scene.camera, i, j); Intersection hit = FindIntersection(ray, scene); image[i][j] = GetColor(scene, ray, hit);}}
niques for real-time ray casting of large volumetric data sets, such as those obtained by CT or MRI scans. Ray casting is a well-known method for efficient volume ren-dering, as it produces quality images using simple ge-ometric algorithms. Since a lot of computational time is used for determining surface intersections and data
Ray Casting - an overview | ScienceDirect Topics
Ray-casting is the most commonly used image-order technique. It simulates optical projections of light rays through the dataset, yielding a simple and visually accurate mechanism for volume rendering [58]. Rays are cast from the viewpoint (also called center of projection) through screen pixels into the volume.
Roth, S. (1982) Ray Casting for Modeling Solids. Computer …
To offer the user more control over the model, this work describes a methodology and tool developed for NURBS parameterization that provides mechanisms for adjusting the shape or even selecting a particular region of interest of the surface.
Ray casting for modeling solids - ScienceDirect
Feb 1, 1982 · This paper presents ray casting as the methodological basis for a CAD/CAM solid modeling system. Solid objects are modeled by combining primitive solids, such as blocks and cylinders, using the set operators union, intersection, and difference.
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