132 lines
3.3 KiB
GLSL
Executable file
132 lines
3.3 KiB
GLSL
Executable file
uniform sampler2DRect particles0;
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uniform sampler2DRect particles1;
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uniform sampler2DRect particles2;
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uniform sampler2DRect u_depth;
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uniform sampler2DRect u_world;
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uniform sampler2DRect u_v4l2cam;
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uniform sampler2DRect warm1;
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uniform sampler2DRect warm2;
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uniform sampler2DRect cold1;
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uniform sampler2DRect cold2;
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uniform float uAreThereTwoPeopleTween;
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uniform float u_time;
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uniform vec3 uHottest0;
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uniform vec3 uHottest1;
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uniform vec3 uHottest3d0;
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uniform vec3 uHottest3d1;
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uniform vec3 uBetween;
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uniform int uEnergy;
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in vec2 texCoordVarying;
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in vec3 gPos;
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in vec4 gTarget;
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in float gTemperature;
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in float gAge;
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vec3 random3(vec3 c) {
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float j = 4096.0*sin(dot(c,vec3(17.0, 59.4, 15.0)));
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vec3 r;
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r.z = fract(512.0*j);
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j *= .125;
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r.x = fract(512.0*j);
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j *= .125;
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r.y = fract(512.0*j);
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return r-0.5;
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}
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/* skew constants for 3d simplex functions */
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const float F3 = 0.3333333;
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const float G3 = 0.1666667;
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/* 3d simplex noise */
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float simplex3d(vec3 p) {
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/* 1. find current tetrahedron T and it's four vertices */
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/* s, s+i1, s+i2, s+1.0 - absolute skewed (integer) coordinates of T vertices */
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/* x, x1, x2, x3 - unskewed coordinates of p relative to each of T vertices*/
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/* calculate s and x */
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vec3 s = floor(p + dot(p, vec3(F3)));
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vec3 x = p - s + dot(s, vec3(G3));
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/* calculate i1 and i2 */
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vec3 e = step(vec3(0.0), x - x.yzx);
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vec3 i1 = e*(1.0 - e.zxy);
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vec3 i2 = 1.0 - e.zxy*(1.0 - e);
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/* x1, x2, x3 */
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vec3 x1 = x - i1 + G3;
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vec3 x2 = x - i2 + 2.0*G3;
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vec3 x3 = x - 1.0 + 3.0*G3;
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/* 2. find four surflets and store them in d */
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vec4 w, d;
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/* calculate surflet weights */
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w.x = dot(x, x);
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w.y = dot(x1, x1);
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w.z = dot(x2, x2);
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w.w = dot(x3, x3);
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/* w fades from 0.6 at the center of the surflet to 0.0 at the margin */
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w = max(0.6 - w, 0.0);
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/* calculate surflet components */
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d.x = dot(random3(s), x);
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d.y = dot(random3(s + i1), x1);
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d.z = dot(random3(s + i2), x2);
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d.w = dot(random3(s + 1.0), x3);
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/* multiply d by w^4 */
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w *= w;
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w *= w;
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d *= w;
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/* 3. return the sum of the four surflets */
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return dot(d, vec4(52.0));
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}
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/* const matrices for 3d rotation */
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const mat3 rot1 = mat3(-0.37, 0.36, 0.85,-0.14,-0.93, 0.34,0.92, 0.01,0.4);
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const mat3 rot2 = mat3(-0.55,-0.39, 0.74, 0.33,-0.91,-0.24,0.77, 0.12,0.63);
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const mat3 rot3 = mat3(-0.71, 0.52,-0.47,-0.08,-0.72,-0.68,-0.7,-0.45,0.56);
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/* directional artifacts can be reduced by rotating each octave */
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float simplex3d_fractal(vec3 m) {
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return 0.5333333*simplex3d(m*rot1)
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+0.2666667*simplex3d(2.0*m*rot2)
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+0.1333333*simplex3d(4.0*m*rot3)
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+0.0666667*simplex3d(8.0*m);
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}
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void main()
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{
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if(gAge >= 1) discard;
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vec2 palette = vec2(gTemperature*3425, 0.5);
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vec3 remapedColorW = texture(warm1, palette).xyz;
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vec3 remapedColorC = texture(cold2, palette).xyz;
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float d = 80;
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float D = 600;
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float n = (simplex3d(gPos * vec3(0.01, 0.01, 0.1 * sin(u_time * 0.01)))) * 100;
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float rate = 1-smoothstep(D - d, D + d, length(gPos.x + uBetween.x) + n);
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rate *= uAreThereTwoPeopleTween;
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vec3 remapedColor = mix(remapedColorC, remapedColorW, rate);
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float alpha = min(1, max(0, 1 - pow(gAge,4)));
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if(uEnergy > 0) {
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alpha *= 0.05;
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}
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else {
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alpha *= 0.1;
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}
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if(gPos.z > -200) {
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discard;
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}
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vec4 color = vec4(remapedColor, alpha);
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fragColor = color;
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}
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