/webgl-in-svg

Render shaders inside SVGs

webgl-in-svg

Render interactive shaders inside SVGs. WebGL is initialized within the raw SVG code.

Use

  1. Edit the uniform, vertex, and fragment tags in the raw SVG.
  2. Open the SVG in a browser.

Uniforms

uResolution and uTime are included by default.

  <uniform name="uMouse" type="VEC_2" x="0.5" y="0.5"/>
  <uniform name="uColor" type="VEC_4" x="0" y="0" z="0" w="0"/>

Shaders

  <vertex>
          precision mediump float;

          attribute vec3 aBaseVertexPosition;
          void main() {
                  gl_Position = vec4(aBaseVertexPosition, 1.0);
          }
  </vertex>
  <fragment>
          #ifdef GL_ES
          precision mediump float;
          #endif

          uniform vec2 uResolution;
          uniform float uTime;

          uniform vec2 uMouse;
          uniform vec4 uColor;

          float circle(vec2 st, vec2 center, float radius) {
                  return step(distance(st, center), radius);
          }

          void main() {
                  vec2 st = gl_FragCoord.xy / uResolution;
                  float circle = circle(st, uMouse, 0.25);
                  vec4 background = vec4(st, 0.5, 1.0);
                  vec4 foreground = uColor;
                  gl_FragColor = mix(background, foreground, circle);
          }
  </fragment>