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39 lines
1.1 KiB
39 lines
1.1 KiB
#ifdef GL_ES
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precision highp float;
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#endif
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uniform sampler2D sceneTex; // 0
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uniform vec2 center; // Mouse position
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uniform float time; // effect elapsed time
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//uniform vec3 shockParams; // 10.0, 0.8, 0.1
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varying vec2 v_texCoords;
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void main()
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{
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// get pixel coordinates
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vec2 l_texCoords = v_texCoords;
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//vec2 center = vec2(0.5, 0.5);
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vec3 shockParams = vec3(10.0, 0.8, 0.1);
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float offset = (time- floor(time))/time;
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float CurrentTime = (time)*(offset);
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//get distance from center
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float distance = distance(v_texCoords, center);
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if ( (distance <= (CurrentTime + shockParams.z)) && (distance >= (CurrentTime - shockParams.z)) ) {
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float diff = (distance - CurrentTime);
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float powDiff = 0.0;
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if(distance>0.05){
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powDiff = 1.0 - pow(abs(diff*shockParams.x), shockParams.y);
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}
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float diffTime = diff * powDiff;
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vec2 diffUV = normalize(v_texCoords-center);
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//Perform the distortion and reduce the effect over time
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l_texCoords = v_texCoords + ((diffUV * diffTime)/(CurrentTime * distance * 40.0));
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}
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gl_FragColor = texture2D(sceneTex, l_texCoords);
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} |