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Adding support for "resurrecting" volumetric code, which is rendered to a separate channel and can be given separate colors.

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Rezmason
2021-09-19 21:48:17 -07:00
parent f17281ab4d
commit 80f5aea2a3
7 changed files with 149 additions and 28 deletions
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22
js/renderer.js
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@@ -65,6 +65,7 @@ export default (regl, config) => {
"rippleScale",
"rippleSpeed",
"rippleThickness",
"resurrectingCodeRatio",
// rain vertex
"forwardSpeed",
// rain render
@@ -293,6 +294,7 @@ export default (regl, config) => {
}
},
vert: `
#define PI 3.14159265359
precision lowp float;
attribute vec2 aPosition, aCorner;
uniform sampler2D lastState;
@@ -304,8 +306,17 @@ export default (regl, config) => {
uniform float time, animationSpeed, forwardSpeed;
uniform bool volumetric;
uniform bool showComputationTexture;
uniform float resurrectingCodeRatio;
varying vec2 vUV;
varying vec3 vChannel;
varying vec4 vGlyph;
highp float rand( const in vec2 uv ) {
const highp float a = 12.9898, b = 78.233, c = 43758.5453;
highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
return fract(sin(sn) * c);
}
void main() {
vUV = (aPosition + aCorner) * quadSize;
@@ -319,8 +330,16 @@ export default (regl, config) => {
vec2 position = (aPosition + aCorner * vec2(density, 1.)) * quadSize;
vec4 pos = vec4((position - 0.5) * 2.0, quadDepth, 1.0);
vChannel = vec3(1.0, 0.0, 0.0);
if (volumetric) {
if (rand(vec2(aPosition.x, 0)) < resurrectingCodeRatio) {
pos.y = -pos.y;
vChannel = vec3(0.0, 1.0, 0.0);
}
pos.x /= glyphHeightToWidth;
pos = camera * transform * pos;
} else {
pos.xy *= screenSize;
@@ -348,6 +367,7 @@ export default (regl, config) => {
uniform bool volumetric;
varying vec2 vUV;
varying vec3 vChannel;
varying vec4 vGlyph;
float median3(vec3 i) {
@@ -416,7 +436,7 @@ export default (regl, config) => {
float sigDist = median3(dist) - 0.5;
float alpha = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
gl_FragColor = vec4(vec3(brightness * alpha), 1.0);
gl_FragColor = vec4(vChannel * brightness * alpha, 1.0);
}
`,