Sha256: 32be34afa0899d39811d034666c7b5145714b777a642f6d7d3c70732987ab569
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Versions: 11
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Stored size: 1.16 KB
Contents
#version 110
// http://empire-defense.crystalin.fr/blog/2d_shock_wave_texture_with_shader
// http://www.geeks3d.com/20091116/shader-library-2d-shockwave-post-processing-filter-glsl/
uniform sampler2D in_Texture; // 0
uniform vec2 in_Center; // Mouse position
uniform float in_Time; // effect elapsed time. Multiply this to affect speed.
// Amplitude?, Refraction?, Width? e.g. 10.0, 0.8, 0.1
uniform vec3 in_ShockParams;
uniform int in_WindowWidth;
uniform int in_WindowHeight;
varying vec2 var_TexCoord;
void main()
{
vec2 uv = var_TexCoord;
vec2 texCoord = uv;
float x = in_Center.x / float(in_WindowWidth);
float y = (float(in_WindowHeight) - in_Center.y) / float(in_WindowHeight);
float distance = distance(uv, vec2(x, y));
if ( (distance <= (in_Time + in_ShockParams.z)) &&
(distance >= (in_Time - in_ShockParams.z)) )
{
float diff = (distance - in_Time);
float powDiff = 1.0 - pow(abs(diff * in_ShockParams.x),
in_ShockParams.y);
float diffTime = diff * powDiff;
vec2 diffUV = normalize(uv - in_Center);
texCoord = uv + (diffUV * diffTime);
}
gl_FragColor = texture2D(in_Texture, texCoord);
}
Version data entries
11 entries across 11 versions & 2 rubygems