SangeFault/assets/minecraft/shaders/program/wobble.fsh

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#version 150
uniform sampler2D DiffuseSampler;
in vec2 texCoord;
in vec2 oneTexel;
uniform vec2 InSize;
uniform float Time;
uniform vec2 Frequency;
uniform vec2 WobbleAmount;
out vec4 fragColor;
vec3 hue(float h)
{
float r = abs(h * 6.0 - 3.0) - 1.0;
float g = 2.0 - abs(h * 6.0 - 2.0);
float b = 2.0 - abs(h * 6.0 - 4.0);
return clamp(vec3(r,g,b), 0.0, 1.0);
}
vec3 HSVtoRGB(vec3 hsv) {
return ((hue(hsv.x) - 1.0) * hsv.y + 1.0) * hsv.z;
}
vec3 RGBtoHSV(vec3 rgb) {
vec3 hsv = vec3(0.0);
hsv.z = max(rgb.r, max(rgb.g, rgb.b));
float min = min(rgb.r, min(rgb.g, rgb.b));
float c = hsv.z - min;
if (c != 0.0)
{
hsv.y = c / hsv.z;
vec3 delta = (hsv.z - rgb) / c;
delta.rgb -= delta.brg;
delta.rg += vec2(2.0, 4.0);
if (rgb.r >= hsv.z) {
hsv.x = delta.b;
} else if (rgb.g >= hsv.z) {
hsv.x = delta.r;
} else {
hsv.x = delta.g;
}
hsv.x = fract(hsv.x / 6.0);
}
return hsv;
}
void main() {
float xOffset = sin(texCoord.y * Frequency.x + Time * 3.1415926535 * 2.0) * WobbleAmount.x;
float yOffset = cos(texCoord.x * Frequency.y + Time * 3.1415926535 * 2.0) * WobbleAmount.y;
vec2 offset = vec2(xOffset, yOffset);
vec4 rgb = texture(DiffuseSampler, texCoord + offset);
vec3 hsv = RGBtoHSV(rgb.rgb);
hsv.x = fract(hsv.x + Time);
fragColor = vec4(HSVtoRGB(hsv), 1.0);
}