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Commit 0ecf468

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gleblebedevgleblebedev
committed
Chromatic Aberration and Vignette
1 parent dae126e commit 0ecf468
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‎bin/CoreData/RenderPaths/Default.renderpath‎

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}
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]
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}
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},
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{
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"type": "FullScreenShaderPass",
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"value": {
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"attributes": [
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{
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"name": "Pass Name",
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"type": "String",
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"value": "Postprocess: Chromatic Aberration"
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},
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{
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"name": "Is Enabled By Default",
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"type": "Bool",
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"value": false
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},
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{
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"name": "Comment",
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"type": "String",
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"value": "Simulates the optical effect known as chromatic aberration, which occurs when a lens fails to focus all colors to the same point."
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},
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{
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"name": "Shader Name",
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"type": "String",
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"value": "v2/P_ChromaticAberration"
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},
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{
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"name": "Read+Write Color Output",
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"type": "Bool",
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"value": true
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},
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{
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"name": "Parameters Prefix",
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"type": "String",
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"value": "Chromatic Aberration: "
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},
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{
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"name": "Parameters",
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"type": "StringVariantMap",
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"value": [
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{
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"key": "Amount",
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"type": "Float",
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"value": 0.4
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}
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]
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}
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]
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}
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},
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{
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"type": "FullScreenShaderPass",
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"value": {
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"attributes": [
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{
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"name": "Pass Name",
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"type": "String",
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"value": "Postprocess: Vignette"
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},
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{
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"name": "Is Enabled By Default",
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"type": "Bool",
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"value": false
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},
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{
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"name": "Comment",
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"type": "String",
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"value": "Creates a darkening effect around the edges of the screen."
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},
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{
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"name": "Shader Name",
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"type": "String",
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"value": "v2/P_Vignette"
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},
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{
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"name": "Read+Write Color Output",
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"type": "Bool",
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"value": true
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},
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{
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"name": "Parameters Prefix",
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"type": "String",
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"value": "Vignette: "
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},
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{
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"name": "Parameters",
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"type": "StringVariantMap",
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"value": [
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{
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"key": "Intensity",
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"type": "Float",
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"value": 0.4
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},
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{
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"key": "Radius",
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"type": "Float",
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"value": 0.5
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},
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{
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"key": "Color",
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"type": "Color",
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"value": "0 0 0 0.4"
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}
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]
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}
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]
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}
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}
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]
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}
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‎bin/CoreData/Shaders/GLSL/v2/P_ChromaticAberration.glsl‎

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#include "_Config.glsl"
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#include "_Uniforms.glsl"
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#include "_VertexLayout.glsl"
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#include "_VertexTransform.glsl"
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#include "_VertexScreenPos.glsl"
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#include "_DefaultSamplers.glsl"
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#include "_SamplerUtils.glsl"
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VERTEX_OUTPUT_HIGHP(vec2 vScreenPos)
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#ifdef URHO3D_PIXEL_SHADER
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UNIFORM_BUFFER_BEGIN(6, Custom)
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UNIFORM(mediump float cAmount)
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UNIFORM_BUFFER_END(6, Custom)
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#endif
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#ifdef URHO3D_VERTEX_SHADER
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void main()
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{
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VertexTransform vertexTransform = GetVertexTransform();
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gl_Position = WorldToClipSpace(vertexTransform.position.xyz);
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vScreenPos = GetScreenPosPreDiv(gl_Position);
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}
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#endif
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#ifdef URHO3D_PIXEL_SHADER
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void main()
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{
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// Calculate scale for screen UV coordinates to preserve shape of the circle
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vec2 aspectRatioCorrection = min(vec2(1.0, 1.0), vec2(cGBufferInvSize.y/cGBufferInvSize.x, cGBufferInvSize.x/cGBufferInvSize.y));
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// Calculate screen coordinates in range -1 .. +1
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vec2 screenPos = (vScreenPos.xy * 2.0 - 1.0) * aspectRatioCorrection;
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float distanceToCenter = dot(screenPos, screenPos);
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// Calculate the offset for each color channel
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vec2 offset = cGBufferInvSize.xy * cAmount * screenPos * distanceToCenter;
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// Sample the texture at the offset positions
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float red = texture(sAlbedo, vScreenPos - offset).r;
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vec2 greenAlpha = texture(sAlbedo, vScreenPos).ga;
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float blue = texture(sAlbedo, vScreenPos + offset).b;
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gl_FragColor = vec4(red, greenAlpha.x, blue, greenAlpha.y);
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}
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#endif
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‎bin/CoreData/Shaders/GLSL/v2/P_Vignette.glsl‎

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#include "_Config.glsl"
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#include "_Uniforms.glsl"
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#include "_VertexLayout.glsl"
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#include "_VertexTransform.glsl"
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#include "_VertexScreenPos.glsl"
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#include "_DefaultSamplers.glsl"
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#include "_SamplerUtils.glsl"
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VERTEX_OUTPUT_HIGHP(vec2 vScreenPos)
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#ifdef URHO3D_PIXEL_SHADER
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UNIFORM_BUFFER_BEGIN(6, Custom)
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UNIFORM(mediump float cIntensity)
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UNIFORM(mediump float cRadius)
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UNIFORM(mediump vec4 cColor)
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UNIFORM_BUFFER_END(6, Custom)
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#endif
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#ifdef URHO3D_VERTEX_SHADER
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void main()
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{
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VertexTransform vertexTransform = GetVertexTransform();
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gl_Position = WorldToClipSpace(vertexTransform.position.xyz);
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vScreenPos = GetScreenPosPreDiv(gl_Position);
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}
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#endif
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#ifdef URHO3D_PIXEL_SHADER
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void main()
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{
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// Sample screen buffer
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half4 rgb = texture(sAlbedo, vScreenPos);
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// Calculate scale for screen UV coordinates to preserve shape of the circle
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vec2 aspectRatioCorrection = min(vec2(1.0, 1.0), vec2(cGBufferInvSize.y/cGBufferInvSize.x, cGBufferInvSize.x/cGBufferInvSize.y));
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// Calculate screen coordinates in range -1 .. +1
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vec2 screenPos = (vScreenPos.xy * 2.0 - 1.0) * aspectRatioCorrection;
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// Calculate distance from screen center to the current pixel in range 0 .. +1
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float len = length(screenPos);
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float vignette = mix(1.0-cColor.a, 1.0, smoothstep(cRadius, cRadius - max(0.0, cIntensity), len));
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gl_FragColor = vec4(mix(rgb.rgb * cColor.rgb, rgb.rgb, vignette), rgb.a);
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}
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#endif

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