ray-tracing_visualize

Visualize ray-tracing by representing sampling ray with line.

• Trace light ray (shadow ray) to check whether this fragment can reach the light source.

• Set object's material :

  • Phong's color : compute local color (+light source color)

  • Flectiont&fraction coeffiecent : determines the weight of color from reflect&refract ray

  • Index : Snell's law

• Continuously draw ray.

Further Improvement

• Performance : should not be memoryless (trace ray every frame).
• Realtime user interaction : ray origin, object material&position.
• Text label : display each ray properties.
• Problem with no-thickness surface

Scene 1 :

• Point light + shadow map + cube with reflect&refract property, max ray depth = 2.
• Black light ray means can not reach the light source.
• White sampling ray mens intersect with on one.

Scene 2 :

• Point light + 3 mirrors + opaque object (the yellow one), max ray depth = 6.
• Draw object in wireframe mode for displaying purpose.
• All refract rays are white.

ray_scene1.mp4

Scene 3 :

• Point light + sphere with reflect&refract property, max ray depth = 2.
• Color of light ray represents the color from Phong's model from that light source.
• Also, color of sampling ray represents color from it's children.

ray_scene2.mp4