ray-intersection
时间: 2023-10-09 10:15:45 浏览: 50
Ray intersection refers to the process of determining whether a given ray intersects with a particular object or surface in a 3D scene. This is an important task in computer graphics, as it is used to determine which objects are visible to the camera and how they appear on the screen.
In ray tracing, a technique used for rendering realistic images, rays are cast from the camera through each pixel on the screen and into the 3D scene. The ray intersection algorithm is then used to determine which objects, if any, the ray intersects with, and where the intersection point is located.
The algorithm typically involves calculating the intersection point of the ray with the surface of the object, and then checking whether that point lies within the bounds of the object. This can be done using mathematical formulas or geometric algorithms, depending on the complexity of the object and the accuracy required.
Once the intersection point has been found, various calculations can be performed to determine how the object should appear on the screen, including shading, lighting, and reflection.