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| shader_type canvas_item; | |
| void fragment() { | |
| vec2 iRes = (1.0/ SCREEN_PIXEL_SIZE); | |
| float offset = (TIME- floor(TIME))/TIME; | |
| float CurrentTime = (TIME)*(offset); | |
| vec3 WaveParams = vec3(.5, 0.1, 0.1); | |
| float ratio = iRes.y/iRes.x; | |
| //Use this if you want to place the centre with the mouse instead | |
| //vec2 WaveCentre = vec2( vec2(500.0, 500.0) / iRes ); | |
| vec2 WaveCentre = vec2(0.5, 0.5); | |
| WaveCentre.y *= ratio; | |
| vec4 texCor = FRAGCOORD / vec4(iRes.x,iRes.y,0,0); | |
| vec2 texCoord = vec2(texCor.x,texCor.y); | |
| texCoord.y *= ratio; | |
| float Dist = distance(vec2(texCoord.x,texCoord.y), WaveCentre); | |
| vec4 Color = texture(TEXTURE, vec2(texCoord.x,texCoord.y)); | |
| //Only distort the pixels within the parameter distance from the centre | |
| if ((Dist <= ((CurrentTime) + (WaveParams.z))) && | |
| (Dist >= ((CurrentTime) - (WaveParams.z)))) | |
| { | |
| //The pixel offset distance based on the input parameters | |
| float Diff = (Dist - CurrentTime); | |
| float ScaleDiff = (5.0 - pow(abs(Diff * WaveParams.x), WaveParams.y)); | |
| float DiffTime = (Diff * ScaleDiff); | |
| //The direction of the distortion | |
| vec2 DiffTexCoord = normalize(vec2(texCoord.x,texCoord.y) - WaveCentre); | |
| //Perform the distortion and reduce the effect over time | |
| texCoord += ((DiffTexCoord * DiffTime) / (CurrentTime * Dist * 5.0)); | |
| Color = texture(TEXTURE, texCoord); | |
| //Blow out the color and reduce the effect over time | |
| Color += (Color * ScaleDiff) / (CurrentTime * Dist * 5.0); | |
| } | |
| COLOR = Color; | |
| } | |
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