molstar
Version:
A comprehensive macromolecular library.
8 lines • 4.12 kB
JavaScript
/**
* Copyright (c) 2019-2021 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
* @author Áron Samuel Kovács <aron.kovacs@mail.muni.cz>
*/
export var postprocessing_frag = "\nprecision highp float;\nprecision highp int;\nprecision highp sampler2D;\n\nuniform sampler2D tSsaoDepth;\nuniform sampler2D tColor;\nuniform sampler2D tDepth;\nuniform sampler2D tOutlines;\nuniform vec2 uTexSize;\n\nuniform float uNear;\nuniform float uFar;\nuniform float uFogNear;\nuniform float uFogFar;\nuniform vec3 uFogColor;\nuniform bool uTransparentBackground;\n\nuniform float uOcclusionBias;\nuniform float uOcclusionRadius;\n\nuniform float uMaxPossibleViewZDiff;\n\nconst vec3 occlusionColor = vec3(0.0);\n\n#include common\n\nfloat getViewZ(const in float depth) {\n #if dOrthographic == 1\n return orthographicDepthToViewZ(depth, uNear, uFar);\n #else\n return perspectiveDepthToViewZ(depth, uNear, uFar);\n #endif\n}\n\nfloat getDepth(const in vec2 coords) {\n return unpackRGBAToDepth(texture2D(tDepth, coords));\n}\n\nbool isBackground(const in float depth) {\n return depth == 1.0;\n}\n\nfloat getOutline(const in vec2 coords, out float closestTexel) {\n float backgroundViewZ = uFar + 3.0 * uMaxPossibleViewZDiff;\n vec2 invTexSize = 1.0 / uTexSize;\n\n float selfDepth = getDepth(coords);\n float selfViewZ = isBackground(selfDepth) ? backgroundViewZ : getViewZ(selfDepth);\n\n float outline = 1.0;\n closestTexel = 1.0;\n for (int y = -dOutlineScale; y <= dOutlineScale; y++) {\n for (int x = -dOutlineScale; x <= dOutlineScale; x++) {\n if (x * x + y * y > dOutlineScale * dOutlineScale) {\n continue;\n }\n\n vec2 sampleCoords = coords + vec2(float(x), float(y)) * invTexSize;\n\n vec4 sampleOutlineCombined = texture2D(tOutlines, sampleCoords);\n float sampleOutline = sampleOutlineCombined.r;\n float sampleOutlineDepth = unpackRGToUnitInterval(sampleOutlineCombined.gb);\n\n if (sampleOutline == 0.0 && sampleOutlineDepth < closestTexel && abs(selfViewZ - sampleOutlineDepth) > uMaxPossibleViewZDiff) {\n outline = 0.0;\n closestTexel = sampleOutlineDepth;\n }\n }\n }\n return outline;\n}\n\nfloat getSsao(vec2 coords) {\n float rawSsao = unpackRGToUnitInterval(texture2D(tSsaoDepth, coords).xy);\n if (rawSsao > 0.999) {\n return 1.0;\n } else if (rawSsao > 0.001) {\n return rawSsao;\n }\n // treat values close to 0.0 as errors and return no occlusion\n return 1.0;\n}\n\nvoid main(void) {\n vec2 coords = gl_FragCoord.xy / uTexSize;\n vec4 color = texture2D(tColor, coords);\n\n float viewDist;\n float fogFactor;\n\n #ifdef dOcclusionEnable\n float depth = getDepth(coords);\n if (!isBackground(depth)) {\n viewDist = abs(getViewZ(depth));\n fogFactor = smoothstep(uFogNear, uFogFar, viewDist);\n float occlusionFactor = getSsao(coords);\n if (!uTransparentBackground) {\n color.rgb = mix(mix(occlusionColor, uFogColor, fogFactor), color.rgb, occlusionFactor);\n } else {\n color.rgb = mix(occlusionColor * (1.0 - fogFactor), color.rgb, occlusionFactor);\n }\n }\n #endif\n\n // outline needs to be handled after occlusion to keep them clean\n #ifdef dOutlineEnable\n float closestTexel;\n float outline = getOutline(coords, closestTexel);\n\n if (outline == 0.0) {\n color.rgb *= outline;\n viewDist = abs(getViewZ(closestTexel));\n fogFactor = smoothstep(uFogNear, uFogFar, viewDist);\n if (!uTransparentBackground) {\n color.rgb = mix(color.rgb, uFogColor, fogFactor);\n } else {\n color.a = 1.0 - fogFactor;\n }\n }\n #endif\n\n gl_FragColor = color;\n}\n";
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