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Ray tracing texture implementation for spheres - Stack …
https://stackoverflow.com/questions/29699342/ray-tracing-texture-implementation-for-spheres
Texture mapping in a ray tracing for sphere in C++ - Stack …
https://stackoverflow.com/questions/22420778/texture-mapping-in-a-ray-tracing-for-sphere-in-c
It basically just map the texture from a PPM file to the sphere. Below are my code for the part. //Call shaderay from trace ray function // index_of_winning_object = index of scene object array // point = intersection point Color shadeRay (int index_of_winning_object, Vect point, Ray ray) { double final_index2; //if no intersection, return the background color (double confirm) …
A Minimal Ray-Tracer: Rendering Simple Shapes (Sphere, …
https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-sphere-intersection
Ray Tracing: Texture Map a Sphere - Graphics and GPU …
https://gamedev.net/forums/topic/632060-ray-tracing-texture-map-a-sphere/4985722/
There is a "perfect" mapping method that involves converting the position on the sphere to spherical coordinates and sampling your texture this way, but it is rather compute-intensive (a couple inverse trigonometric functions, so quite undesirable) and from your description my guess is you are using the tangent/bitangent/normal technique to texture your …
Ray Tracing: Texture Map a Sphere - Graphics and GPU …
https://www.gamedev.net/forums/topic/632060-ray-tracing-texture-map-a-sphere/4996459/
Ray Tracing: Texture Map a Sphere Graphics and GPU Programming Programming. Started by Prozak September 30, 2012 04:52 AM. 8 comments, last by MrOMGWTF 9 years, 4 months ago Advertisement ...
Textures and normals in ray tracing
https://www.cs.cornell.edu/courses/cs4620/2017sp/slides/06rt-textures.pdf
in ray tracing 1 • Objects have properties that vary across the surface ... sphere, cylinder) ... • Texture coordinates become per-vertex data like vertex positions – can think of them as a second position: each vertex has a position in 3D space and in 2D texure space
Texture Mapping - Ray Tracer Challenge
http://raytracerchallenge.com/bonus/texture-mapping.html
The next step is to create a Pattern subclass (like your stripes, rings, or gradient patterns) that uses these functions to texture the surface of a sphere. Write a function texture_map(uv_pattern, uv_map), which returns a new TextureMap pattern instance that encapsulates the given uv_pattern (like uv_checkers()) and uv_map (like spherical_map()). Here's a test, showing how …
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