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{
"QEN": {
"description": "This node creates a medium quality but fast blur of the source item. Suitable when speed is more important than output quality. It uses mipmap levels and does not require BlurHelper node.",
"fragmentCode": [
"@requires NoiseHelper",
"@main",
"{",
" const float lod = sqrt(mipmapBlurAmount);",
" const vec3 r = mipmapBlurScatterAmount * lod * (hash23(fragCoord) - vec3(0.5));",
" const vec2 cCoord = texCoord + vec2(r.xy * 0.01);",
" const float m = (1.0 + r.z);",
"#if (MIPMAP_BLUR_QUALITY_LOW == 1)",
" vec4 blurredTex = textureLod(iSource, cCoord + m * 0.01, lod);",
"#else",
" // Take textures from suitable mipmap level, with offsets",
" const float o = m * mipmapBlurAmount / iResolution.x * 0.5;",
" vec2 lo1 = cCoord + vec2(o, o);",
" vec2 lo2 = cCoord + vec2(o, -o);",
" vec2 lo3 = cCoord + vec2(-o, o);",
" vec2 lo4 = cCoord + vec2(-o, -o);",
"",
" vec4 t = textureLod(iSource, texCoord, lod);",
" vec4 t1 = textureLod(iSource, lo1, lod);",
" vec4 t2 = textureLod(iSource, lo2, lod);",
" vec4 t3 = textureLod(iSource, lo3, lod);",
" vec4 t4 = textureLod(iSource, lo4, lod);",
" vec4 blurredTex = (0.28 * t + 0.18 * t1 + 0.18 * t2 + 0.18 * t3 + 0.18 * t4);",
"#endif",
" fragColor = blurredTex;",
"}"
],
"name": "MipmapBlur",
"properties": [
{
"defaultValue": "0",
"description": "This value defines the amount (radius) of the blur.",
"maxValue": "30",
"minValue": "0",
"name": "mipmapBlurAmount",
"type": "float"
},
{
"defaultValue": "0",
"description": "This value defines the amount of scatter (randomness) in the blur. This creates frosty looking blur.",
"maxValue": "1",
"minValue": "0",
"name": "mipmapBlurScatterAmount",
"type": "float"
},
{
"defaultValue": "0",
"description": "When this is set to 1, only a single texture lookup is used for the blur. With this blur is very fast but also quite low quality.",
"name": "MIPMAP_BLUR_QUALITY_LOW",
"type": "define"
}
],
"version": 1
}
}
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