32 lines
1.3 KiB
Plaintext
32 lines
1.3 KiB
Plaintext
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//Gravitational lensing effect. Edited from https://unionassets.com/blog/the-effect-of-the-gravitational-lens-195 to be Clyde based (based on what)
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uniform sampler2D SCREEN_TEXTURE;
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uniform highp vec2 positionInput = vec2(0,0);
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uniform highp float falloff = 5.0;
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uniform highp float intensity = 5.0;
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void fragment() {
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float distanceToCenter = length(FRAGCOORD.xy-positionInput);
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vec2 finalCoords = FRAGCOORD.xy - positionInput;
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highp float deformation = (pow(intensity, 2)*500) / pow(distanceToCenter, pow(falloff, 0.5));
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if(deformation > 0.8) //Edit this for inward effect
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deformation = pow(deformation, 0.3);
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if(deformation > 0.001){
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finalCoords *= 1-deformation; //Change this to 1+deformation for inward effect
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finalCoords += positionInput;
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//float darkenCircleSize = 600; //Calculate optional darkening effect (darker the closer we are to the center of the singularity)
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//float alph = (distanceToCenter-30)/(darkenCircleSize-30);
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//float darkening = 0.9-(alph*0.9);
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//Darkening effect optional (Darker the closer you are to the center)
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//COLOR = mix(texture(SCREEN_TEXTURE, finalCoords*SCREEN_PIXEL_SIZE), vec4(0.0, 0.0, 0.0, 1.0), darkening);
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COLOR = texture(SCREEN_TEXTURE, finalCoords*SCREEN_PIXEL_SIZE);
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}
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else{
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COLOR = texture(SCREEN_TEXTURE, FRAGCOORD.xy*SCREEN_PIXEL_SIZE);
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}
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}
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