69 lines
2.0 KiB
GLSL
69 lines
2.0 KiB
GLSL
#version 330 core
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in vec2 TexCoord;
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flat in int TexIndex;
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out vec4 FragColor;
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uniform sampler2D Texture0;
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uniform sampler2D Texture1;
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uniform sampler2D Texture2;
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uniform sampler2D Texture3;
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uniform float u_time;
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uniform float u_battery;
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uniform vec2 u_resolution;
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float rand(vec2 co) {
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return fract(sin(dot(co.xy, vec2(12.9898,78.233))) * 43758.5453);
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}
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float hash(vec2 p) {
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p = fract(p * vec2(123.34, 456.21));
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p += dot(p, p + 45.32);
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return fract(p.x * p.y);
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}
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void main()
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{
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vec4 texColor;
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switch (TexIndex) {
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case 0: texColor = texture(Texture0, TexCoord); break;
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case 1: texColor = texture(Texture1, TexCoord); break;
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case 2: texColor = texture(Texture2, TexCoord); break;
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case 3: texColor = texture(Texture3, TexCoord); break;
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default: texColor = vec4(1.0, 0.0, 0.0, 1.0); break;
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}
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if (TexIndex == 1) {
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vec2 uv = gl_FragCoord.xy / u_resolution.xy;
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uv.x *= u_resolution.x / u_resolution.y;
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float blockSize = 6.0;
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float strength = 1.0 - u_battery;
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vec2 blockUV = floor(gl_FragCoord.xy / blockSize);
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float noise = hash(blockUV + vec2(u_time * 3.0, u_time * 7.0));
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float noise2 = hash(blockUV + vec2(u_time * 13.0, u_time * 3.0));
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float noise3 = hash(blockUV + vec2(u_time * 17.0, u_time * 13.0));
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// Horizontal bands
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noise *= 0.9 + 0.1 * sin(uv.y * 400.0);
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noise2 *= 0.9 + 0.1 * sin(uv.y * 400.0);
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noise3 *= 0.9 + 0.1 * sin(uv.y * 400.0);
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float offset = 0.001 / (u_battery * u_battery + 0.001 );
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float r = texture(Texture1, TexCoord + vec2(offset * 5, 0.0)).r;
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float g = texture(Texture1, TexCoord + vec2(0.0, offset * 2.0)).g;
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float b = texture(Texture1, TexCoord - vec2(offset, 0.0)).b;
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vec3 color = vec3(r, g, b);
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vec3 noisyColor = mix(color.rgb, vec3(noise, noise2, noise3), strength / 2);
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// float flicker = 0.75 + sin(u_time * 6.0 + sin(u_time * 3)) * 0.25;
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float flicker = 0.75 + 0.25 * sin(u_time + sin(u_time * 7.0));
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FragColor = vec4(noisyColor, texColor.a * flicker);
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} else {
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FragColor = texColor;
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}
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}
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