kopia lustrzana https://github.com/jameshball/osci-render
70 wiersze
2.4 KiB
GLSL
70 wiersze
2.4 KiB
GLSL
std::string outputFragmentShader = R"(
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uniform sampler2D uTexture0; //line
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uniform sampler2D uTexture1; //tight glow
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uniform sampler2D uTexture2; //big glow
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uniform sampler2D uTexture3; //screen
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uniform sampler2D uTexture4; //reflection
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uniform sampler2D uTexture5; //screen glow
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uniform float uExposure;
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uniform float uSaturation;
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uniform float uNoise;
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uniform float uTime;
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uniform float uGlow;
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uniform float uAmbient;
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uniform float uFishEye;
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uniform float uRealScreen;
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uniform vec2 uOffset;
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uniform vec2 uScale;
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uniform vec3 uColour;
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varying vec2 vTexCoord;
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varying vec2 vTexCoordCanvas;
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vec3 desaturate(vec3 color, float factor) {
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vec3 lum = vec3(0.299, 0.587, 0.114);
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vec3 gray = vec3(dot(lum, color));
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return vec3(mix(color, gray, factor));
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}
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float noise(in vec2 uv, in float time) {
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return (fract(sin(dot(uv, vec2(12.9898,78.233)*2.0 + time)) * 43758.5453)) - 0.5;
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}
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void main() {
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vec2 linePos = (vTexCoordCanvas - 0.5) / uScale + 0.5 + uOffset;
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// fish eye distortion
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vec2 uv = linePos - vec2(0.5);
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float uva = atan(uv.x, uv.y);
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float uvd = sqrt(dot(uv, uv));
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uvd = uvd * (1.0 + uFishEye * uvd * uvd);
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linePos = vec2(0.5) + vec2(sin(uva), cos(uva)) * uvd;
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vec4 line = texture2D(uTexture0, linePos);
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// r components have grid; g components do not.
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vec4 screen = texture2D(uTexture3, vTexCoord);
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vec4 tightGlow = texture2D(uTexture1, linePos);
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vec4 scatter = texture2D(uTexture2, linePos) + (1.0 - uRealScreen) * max(uAmbient - 0.35, 0.0);
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if (uRealScreen > 0.5) {
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vec4 reflection = texture2D(uTexture4, vTexCoord);
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vec4 screenGlow = texture2D(uTexture5, vTexCoord);
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scatter += screenGlow * reflection * max(1.0 - uAmbient, 0.0);
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}
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float light = line.r + uGlow * 1.5 * screen.g * screen.g * tightGlow.r;
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light += uGlow * 0.3 * scatter.g * (2.0 + 1.0 * screen.g + 0.5 * screen.r);
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float tlight = 1.0-pow(2.0, -uExposure*light);
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float tlight2 = tlight * tlight * tlight;
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gl_FragColor.rgb = mix(uColour, vec3(1.0), 0.3+tlight2*tlight2*0.5) * tlight;
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if (uRealScreen > 0.5) {
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float ambient = pow(2.0, uExposure) * uAmbient;
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gl_FragColor.rgb += ambient * screen.rgb;
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}
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gl_FragColor.rgb = desaturate(gl_FragColor.rgb, 1.0 - uSaturation);
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gl_FragColor.rgb += uNoise * noise(gl_FragCoord.xy, uTime);
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gl_FragColor.a = 1.0;
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}
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)";
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