ray casting การใช้

• One important advantage ray casting offered over older cones and spheres.
• This algorithm has since been termed " ray casting ".
• This gallery represents a collection of images rendered using high quality volume ray casting.
• Ray casting is the most basic of many computer graphics texture maps or other methods.
• The first ray casting algorithm used for rendering was presented by Arthur Appel in 1968.
• If a mathematical surface can be intersected by a ray, it can be rendered using ray casting.
• It utilizes both the slice based as well as the GPU ray casting approach to visualize the volume data.
• The high speed of calculation made ray casting a handy rendering method in early real-time 3D video games.
• Most implementations of the ray casting algorithm consecutively check intersections of a ray with all sides of the polygon in turn.
• This technique is relatively fast in software at the cost of less accurate sampling and potentially worse image quality compared to ray casting.
• Examples include screen-to-world ray casting, world-to-subspace-to-world object transformations, and physical simulations.
• It is also possible to approximate the equation using ray casting in a different way than what is traditionally considered to be " ray tracing ".
• An early description of the problem in computer graphics shows two common approaches ( ray casting and angle summation ) in use as early as 1974.
• Commonly the crisp appearance of volume ray casting images distinguishes them from output of texture mapping VR due to higher accuracy of volume ray casting renderings.
• Commonly the crisp appearance of volume ray casting images distinguishes them from output of texture mapping VR due to higher accuracy of volume ray casting renderings.
• The idea behind ray casting is to shoot rays from the eye, one per pixel, and find the closest object blocking the path of that ray.
• An early use of Appel's ray casting rendering algorithm was by Mathematical Applications Group, Inc ., ( MAGI ) of Elmsford, New York.
• It did not apply textures to the floor and ceiling, and the ray casting restricted walls to a fixed height, and levels were all on the same plane.
• With such power, virtually any algorithm with steps that can be performed in parallel, such as volume ray casting or tomographic reconstruction, can be performed with tremendous acceleration.
• They were not capable of full 3D rendering, but used ray casting 2.5D techniques to draw the environment and textures to render the environment instead of simple wire-frame models or solid colors.