37 lines
931 B
GLSL
Executable file
37 lines
931 B
GLSL
Executable file
// Based on work by David Li(http://david.li/waves)
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#version 450
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#ifdef GL_ES
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precision mediump float;
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#endif
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const float PI = 3.14159265359;
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const float G = 9.81;
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const float KM = 370.0;
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in vec2 texCoord;
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out vec4 fragColor;
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uniform sampler2D u_phases;
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uniform float u_deltaTime;
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const float resolution = 512.0;
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const float size = 250.0;
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float omega(float k) {
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return sqrt(G * k * (1.0 + k * k / KM * KM));
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}
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void main() {
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vec2 coordinates = texCoord * resolution;// gl_FragCoord.xy - 0.5;
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float n = (coordinates.x < resolution * 0.5) ? coordinates.x : coordinates.x - resolution;
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float m = (coordinates.y < resolution * 0.5) ? coordinates.y : coordinates.y - resolution;
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vec2 waveVector = (2.0 * PI * vec2(n, m)) / size;
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float phase = texture(u_phases, texCoord).r;
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float deltaPhase = omega(length(waveVector)) * u_deltaTime;
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phase = mod(phase + deltaPhase, 2.0 * PI);
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fragColor = vec4(phase, 0.0, 0.0, 0.0);
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}
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