amaranthyan / raymarching

2D light simulation using ray marching

RayMarching 2D Rendering

My personal rendering project inspired by @miloyip's articles on ZhiHu link

Improvements

Instead of using CPU to calculate light and outputing results to a png file as the author did in his articles, this project use GPU to accelerate computation and display results directly on screen.
Light calculations are done by fragment shader in GLSL(OpenGL), however even so the amount of computation power needed for rendering complex 2D SDF scenes (multiple sdf objects with reflection/refraction depth > 3) is beyond the reach of real-time rendering.
Thus the rendering of one result image is seperated into multiple iterations each draws a portion of the frame to the frame buffer object, but we can always trade lower rendering quality for less drawing time.

Techniques

• OpenGL + GLSL
• SDF objects
• Reflection + Refraction + Fresnel-Schlick + Beer-Lambert
• RGB color light support

Result Demo

Scene with one light source and multiple sdf objects