265 lines
8.4 KiB
GLSL
265 lines
8.4 KiB
GLSL
#include "Uniforms.glsl"
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#include "Samplers.glsl"
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#include "Transform.glsl"
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#include "ScreenPos.glsl"
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#include "Lighting.glsl"
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#include "Constants.glsl"
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#include "Fog.glsl"
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#include "PBR.glsl"
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#include "IBL.glsl"
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#line 30010
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#if defined(NORMALMAP)
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varying vec4 vTexCoord;
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varying vec4 vTangent;
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#else
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varying vec2 vTexCoord;
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#endif
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varying vec3 vNormal;
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varying vec4 vWorldPos;
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#ifdef VERTEXCOLOR
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varying vec4 vColor;
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#endif
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#ifdef PERPIXEL
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#ifdef SHADOW
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#ifndef GL_ES
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varying vec4 vShadowPos[NUMCASCADES];
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#else
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varying highp vec4 vShadowPos[NUMCASCADES];
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#endif
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#endif
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#ifdef SPOTLIGHT
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varying vec4 vSpotPos;
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#endif
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#ifdef POINTLIGHT
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varying vec3 vCubeMaskVec;
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#endif
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#else
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varying vec3 vVertexLight;
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varying vec4 vScreenPos;
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#ifdef ENVCUBEMAP
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varying vec3 vReflectionVec;
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#endif
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#if defined(LIGHTMAP)
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varying vec2 vTexCoord2;
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#endif
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#endif
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void VS()
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{
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mat4 modelMatrix = iModelMatrix;
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vec3 worldPos = GetWorldPos(modelMatrix);
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gl_Position = GetClipPos(worldPos);
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vNormal = GetWorldNormal(modelMatrix);
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vWorldPos = vec4(worldPos, GetDepth(gl_Position));
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#ifdef VERTEXCOLOR
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vColor = iColor;
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#endif
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#if defined(NORMALMAP) || defined(DIRBILLBOARD)
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vec4 tangent = GetWorldTangent(modelMatrix);
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vec3 bitangent = cross(tangent.xyz, vNormal) * tangent.w;
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vTexCoord = vec4(GetTexCoord(iTexCoord), bitangent.xy);
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vTangent = vec4(tangent.xyz, bitangent.z);
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#else
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vTexCoord = GetTexCoord(iTexCoord);
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#endif
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#ifdef PERPIXEL
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// Per-pixel forward lighting
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vec4 projWorldPos = vec4(worldPos, 1.0);
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#ifdef SHADOW
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// Shadow projection: transform from world space to shadow space
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for (int i = 0; i < NUMCASCADES; i++)
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vShadowPos[i] = GetShadowPos(i, vNormal, projWorldPos);
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#endif
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#ifdef SPOTLIGHT
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// Spotlight projection: transform from world space to projector texture coordinates
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vSpotPos = projWorldPos * cLightMatrices[0];
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#endif
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#ifdef POINTLIGHT
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vCubeMaskVec = (worldPos - cLightPos.xyz) * mat3(cLightMatrices[0][0].xyz, cLightMatrices[0][1].xyz, cLightMatrices[0][2].xyz);
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#endif
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#else
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// Ambient & per-vertex lighting
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#if defined(LIGHTMAP)
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// If using lightmap, disregard zone ambient light
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vVertexLight = vec3(0.0, 0.0, 0.0);
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vTexCoord2 = iTexCoord1;
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#elif defined(AO)
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// If using AO, calculate ambient in the PS
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vVertexLight = vec3(0.0, 0.0, 0.0);
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#else
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vVertexLight = GetAmbient(GetZonePos(worldPos));
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#endif
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#ifdef NUMVERTEXLIGHTS
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for (int i = 0; i < NUMVERTEXLIGHTS; ++i)
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vVertexLight += GetVertexLight(i, worldPos, vNormal) * cVertexLights[i * 3].rgb;
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#endif
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vScreenPos = GetScreenPos(gl_Position);
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#ifdef ENVCUBEMAP
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vReflectionVec = worldPos - cCameraPos;
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#endif
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#endif
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}
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void PS()
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{
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// Get material diffuse albedo
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#ifdef DIFFMAP
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vec4 diffInput = texture2D(sDiffMap, vTexCoord.xy);
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#ifdef ALPHAMASK
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if (diffInput.a < 0.5)
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discard;
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#endif
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vec4 diffColor = cMatDiffColor * diffInput;
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#else
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vec4 diffColor = cMatDiffColor;
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#endif
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#ifdef VERTEXCOLOR
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diffColor *= vColor;
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#endif
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#ifdef METALLIC
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vec4 roughMetalSrc = texture2D(sSpecMap, vTexCoord.xy);
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float roughness = roughMetalSrc.r + cRoughness;
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float metalness = roughMetalSrc.g + cMetallic;
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#else
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float roughness = cRoughness;
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float metalness = cMetallic;
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#endif
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roughness *= roughness;
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roughness = clamp(roughness, ROUGHNESS_FLOOR, 1.0);
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metalness = clamp(metalness, METALNESS_FLOOR, 1.0);
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vec3 specColor = mix(0.08 * cMatSpecColor.rgb, diffColor.rgb, metalness);
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diffColor.rgb = diffColor.rgb - diffColor.rgb * metalness;
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// Get normal
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#if defined(NORMALMAP) || defined(DIRBILLBOARD)
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vec3 tangent = vTangent.xyz;
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vec3 bitangent = vec3(vTexCoord.zw, vTangent.w);
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mat3 tbn = mat3(tangent, bitangent, vNormal);
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#endif
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#ifdef NORMALMAP
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vec3 nn = DecodeNormal(texture2D(sNormalMap, vTexCoord.xy));
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//nn.rg *= 2.0;
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vec3 normal = normalize(tbn * nn);
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#else
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vec3 normal = normalize(vNormal);
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#endif
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// Get fog factor
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#ifdef HEIGHTFOG
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float fogFactor = GetHeightFogFactor(vWorldPos.w, vWorldPos.y);
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#else
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float fogFactor = GetFogFactor(vWorldPos.w);
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#endif
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#if defined(PERPIXEL)
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// Per-pixel forward lighting
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vec3 lightColor;
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vec3 lightDir;
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vec3 finalColor;
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float atten = 1;
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#if defined(DIRLIGHT)
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atten = GetAtten(normal, vWorldPos.xyz, lightDir);
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#elif defined(SPOTLIGHT)
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atten = GetAttenSpot(normal, vWorldPos.xyz, lightDir);
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#else
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atten = GetAttenPoint(normal, vWorldPos.xyz, lightDir);
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#endif
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float shadow = 1.0;
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#ifdef SHADOW
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shadow = GetShadow(vShadowPos, vWorldPos.w);
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#endif
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#if defined(SPOTLIGHT)
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lightColor = vSpotPos.w > 0.0 ? texture2DProj(sLightSpotMap, vSpotPos).rgb * cLightColor.rgb : vec3(0.0, 0.0, 0.0);
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#elif defined(CUBEMASK)
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lightColor = textureCube(sLightCubeMap, vCubeMaskVec).rgb * cLightColor.rgb;
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#else
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lightColor = cLightColor.rgb;
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#endif
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vec3 toCamera = normalize(cCameraPosPS - vWorldPos.xyz);
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vec3 lightVec = normalize(lightDir);
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float ndl = clamp((dot(normal, lightVec)), M_EPSILON, 1.0);
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vec3 BRDF = GetBRDF(vWorldPos.xyz, lightDir, lightVec, toCamera, normal, roughness, diffColor.rgb, specColor);
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finalColor.rgb = BRDF * lightColor * (atten * shadow) / M_PI;
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#ifdef AMBIENT
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finalColor += cAmbientColor.rgb * diffColor.rgb;
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finalColor += cMatEmissiveColor;
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gl_FragColor = vec4(GetFog(finalColor, fogFactor), diffColor.a);
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#else
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gl_FragColor = vec4(GetLitFog(finalColor, fogFactor), diffColor.a);
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#endif
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#elif defined(DEFERRED)
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// Fill deferred G-buffer
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const vec3 spareData = vec3(0,0,0); // Can be used to pass more data to deferred renderer
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gl_FragData[0] = vec4(specColor, spareData.r);
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gl_FragData[1] = vec4(diffColor.rgb, spareData.g);
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gl_FragData[2] = vec4(normal * roughness, spareData.b);
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gl_FragData[3] = vec4(EncodeDepth(vWorldPos.w), 0.0);
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#else
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// Ambient & per-vertex lighting
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vec3 finalColor = vVertexLight * diffColor.rgb;
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vec3 ambientOcclusion = vec3(1.0, 1.0, 1.0);
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#ifdef AO
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// If using AO, the vertex light ambient is black, calculate occluded ambient here
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ambientOcclusion = texture2D(sEmissiveMap, vTexCoord.xy).rgb;
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finalColor += ambientOcclusion * cAmbientColor.rgb * diffColor.rgb;
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#endif
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#ifdef MATERIAL
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// Add light pre-pass accumulation result
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// Lights are accumulated at half intensity. Bring back to full intensity now
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vec4 lightInput = 2.0 * texture2DProj(sLightBuffer, vScreenPos);
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vec3 lightSpecColor = lightInput.a * lightInput.rgb / max(GetIntensity(lightInput.rgb), 0.001);
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finalColor += lightInput.rgb * diffColor.rgb + lightSpecColor * specColor;
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#endif
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vec3 toCamera = normalize(vWorldPos.xyz - cCameraPosPS);
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vec3 reflection = normalize(reflect(toCamera, normal));
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vec3 cubeColor = vVertexLight.rgb;
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#ifdef IBL
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vec3 iblColor = ImageBasedLighting(reflection, normal, toCamera, diffColor.rgb, specColor.rgb, roughness, cubeColor);
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finalColor.rgb += iblColor * ambientOcclusion;
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#endif
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#ifdef ENVCUBEMAP
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finalColor += cMatEnvMapColor * textureCube(sEnvCubeMap, reflect(vReflectionVec, normal)).rgb;
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#endif
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#ifdef LIGHTMAP
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finalColor += texture2D(sEmissiveMap, vTexCoord2).rgb * diffColor.rgb;
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#endif
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#ifdef EMISSIVEMAP
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finalColor += cMatEmissiveColor * texture2D(sEmissiveMap, vTexCoord.xy).rgb;
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#else
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finalColor += cMatEmissiveColor;
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#endif
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gl_FragColor = vec4(GetFog(finalColor, fogFactor), diffColor.a);
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#endif
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}
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