Added handling of flipSided also to normal map shader.

See #2352

build/three.min.js

@@ -510,7 +510,7 @@ vertexShader:"uniform float mRefractionRatio;\nuniform float mFresnelBias;\nunif
 normal:{uniforms:THREE.UniformsUtils.merge([THREE.UniformsLib.fog,THREE.UniformsLib.lights,THREE.UniformsLib.shadowmap,{enableAO:{type:"i",value:0},enableDiffuse:{type:"i",value:0},enableSpecular:{type:"i",value:0},enableReflection:{type:"i",value:0},enableDisplacement:{type:"i",value:0},tDisplacement:{type:"t",value:null},tDiffuse:{type:"t",value:null},tCube:{type:"t",value:null},tNormal:{type:"t",value:null},tSpecular:{type:"t",value:null},tAO:{type:"t",value:null},uNormalScale:{type:"f",value:1},
 uDisplacementBias:{type:"f",value:0},uDisplacementScale:{type:"f",value:1},uDiffuseColor:{type:"c",value:new THREE.Color(16777215)},uSpecularColor:{type:"c",value:new THREE.Color(1118481)},uAmbientColor:{type:"c",value:new THREE.Color(16777215)},uShininess:{type:"f",value:30},uOpacity:{type:"f",value:1},useRefract:{type:"i",value:0},uRefractionRatio:{type:"f",value:0.98},uReflectivity:{type:"f",value:0.5},uOffset:{type:"v2",value:new THREE.Vector2(0,0)},uRepeat:{type:"v2",value:new THREE.Vector2(1,
 1)},wrapRGB:{type:"v3",value:new THREE.Vector3(1,1,1)}}]),fragmentShader:["uniform vec3 uAmbientColor;\nuniform vec3 uDiffuseColor;\nuniform vec3 uSpecularColor;\nuniform float uShininess;\nuniform float uOpacity;\nuniform bool enableDiffuse;\nuniform bool enableSpecular;\nuniform bool enableAO;\nuniform bool enableReflection;\nuniform sampler2D tDiffuse;\nuniform sampler2D tNormal;\nuniform sampler2D tSpecular;\nuniform sampler2D tAO;\nuniform samplerCube tCube;\nuniform float uNormalScale;\nuniform bool useRefract;\nuniform float uRefractionRatio;\nuniform float uReflectivity;\nvarying vec3 vTangent;\nvarying vec3 vBinormal;\nvarying vec3 vNormal;\nvarying vec2 vUv;\nuniform vec3 ambientLightColor;\n#if MAX_DIR_LIGHTS > 0\nuniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];\nuniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];\n#endif\n#if MAX_HEMI_LIGHTS > 0\nuniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];\nuniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];\nuniform vec3 hemisphereLightPosition[ MAX_HEMI_LIGHTS ];\n#endif\n#if MAX_POINT_LIGHTS > 0\nuniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];\nuniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];\nuniform float pointLightDistance[ MAX_POINT_LIGHTS ];\n#endif\n#if MAX_SPOT_LIGHTS > 0\nuniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];\nuniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];\nuniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];\nuniform float spotLightAngle[ MAX_SPOT_LIGHTS ];\nuniform float spotLightExponent[ MAX_SPOT_LIGHTS ];\nuniform float spotLightDistance[ MAX_SPOT_LIGHTS ];\n#endif\n#ifdef WRAP_AROUND\nuniform vec3 wrapRGB;\n#endif\nvarying vec3 vWorldPosition;",
-THREE.ShaderChunk.shadowmap_pars_fragment,THREE.ShaderChunk.fog_pars_fragment,"void main() {\nvec3 vViewPosition = cameraPosition - vWorldPosition;\ngl_FragColor = vec4( vec3( 1.0 ), uOpacity );\nvec3 specularTex = vec3( 1.0 );\nvec3 normalTex = texture2D( tNormal, vUv ).xyz * 2.0 - 1.0;\nnormalTex.xy *= uNormalScale;\nnormalTex = normalize( normalTex );\nif( enableDiffuse ) {\n#ifdef GAMMA_INPUT\nvec4 texelColor = texture2D( tDiffuse, vUv );\ntexelColor.xyz *= texelColor.xyz;\ngl_FragColor = gl_FragColor * texelColor;\n#else\ngl_FragColor = gl_FragColor * texture2D( tDiffuse, vUv );\n#endif\n}\nif( enableAO ) {\n#ifdef GAMMA_INPUT\nvec4 aoColor = texture2D( tAO, vUv );\naoColor.xyz *= aoColor.xyz;\ngl_FragColor.xyz = gl_FragColor.xyz * aoColor.xyz;\n#else\ngl_FragColor.xyz = gl_FragColor.xyz * texture2D( tAO, vUv ).xyz;\n#endif\n}\nif( enableSpecular )\nspecularTex = texture2D( tSpecular, vUv ).xyz;\nmat3 tsb = mat3( normalize( vTangent ), normalize( vBinormal ), normalize( vNormal ) );\nvec3 finalNormal = tsb * normalTex;\nvec3 normal = normalize( finalNormal );\nvec3 viewPosition = normalize( vViewPosition );\n#if MAX_POINT_LIGHTS > 0\nvec3 pointDiffuse = vec3( 0.0 );\nvec3 pointSpecular = vec3( 0.0 );\nfor ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {\nvec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );\nvec3 pointVector = lPosition.xyz + vViewPosition.xyz;\nfloat pointDistance = 1.0;\nif ( pointLightDistance[ i ] > 0.0 )\npointDistance = 1.0 - min( ( length( pointVector ) / pointLightDistance[ i ] ), 1.0 );\npointVector = normalize( pointVector );\n#ifdef WRAP_AROUND\nfloat pointDiffuseWeightFull = max( dot( normal, pointVector ), 0.0 );\nfloat pointDiffuseWeightHalf = max( 0.5 * dot( normal, pointVector ) + 0.5, 0.0 );\nvec3 pointDiffuseWeight = mix( vec3 ( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), wrapRGB );\n#else\nfloat pointDiffuseWeight = max( dot( normal, pointVector ), 0.0 );\n#endif\npointDiffuse += pointDistance * pointLightColor[ i ] * uDiffuseColor * pointDiffuseWeight;\nvec3 pointHalfVector = normalize( pointVector + viewPosition );\nfloat pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );\nfloat pointSpecularWeight = specularTex.r * max( pow( pointDotNormalHalf, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( pointVector, pointHalfVector ), 5.0 );\npointSpecular += schlick * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * pointDistance * specularNormalization;\n#else\npointSpecular += pointDistance * pointLightColor[ i ] * uSpecularColor * pointSpecularWeight * pointDiffuseWeight;\n#endif\n}\n#endif\n#if MAX_SPOT_LIGHTS > 0\nvec3 spotDiffuse = vec3( 0.0 );\nvec3 spotSpecular = vec3( 0.0 );\nfor ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {\nvec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );\nvec3 spotVector = lPosition.xyz + vViewPosition.xyz;\nfloat spotDistance = 1.0;\nif ( spotLightDistance[ i ] > 0.0 )\nspotDistance = 1.0 - min( ( length( spotVector ) / spotLightDistance[ i ] ), 1.0 );\nspotVector = normalize( spotVector );\nfloat spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );\nif ( spotEffect > spotLightAngle[ i ] ) {\nspotEffect = pow( spotEffect, spotLightExponent[ i ] );\n#ifdef WRAP_AROUND\nfloat spotDiffuseWeightFull = max( dot( normal, spotVector ), 0.0 );\nfloat spotDiffuseWeightHalf = max( 0.5 * dot( normal, spotVector ) + 0.5, 0.0 );\nvec3 spotDiffuseWeight = mix( vec3 ( spotDiffuseWeightFull ), vec3( spotDiffuseWeightHalf ), wrapRGB );\n#else\nfloat spotDiffuseWeight = max( dot( normal, spotVector ), 0.0 );\n#endif\nspotDiffuse += spotDistance * spotLightColor[ i ] * uDiffuseColor * spotDiffuseWeight * spotEffect;\nvec3 spotHalfVector = normalize( spotVector + viewPosition );\nfloat spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );\nfloat spotSpecularWeight = specularTex.r * max( pow( spotDotNormalHalf, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( spotVector, spotHalfVector ), 5.0 );\nspotSpecular += schlick * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * spotDistance * specularNormalization * spotEffect;\n#else\nspotSpecular += spotDistance * spotLightColor[ i ] * uSpecularColor * spotSpecularWeight * spotDiffuseWeight * spotEffect;\n#endif\n}\n}\n#endif\n#if MAX_DIR_LIGHTS > 0\nvec3 dirDiffuse = vec3( 0.0 );\nvec3 dirSpecular = vec3( 0.0 );\nfor( int i = 0; i < MAX_DIR_LIGHTS; i++ ) {\nvec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );\nvec3 dirVector = normalize( lDirection.xyz );\n#ifdef WRAP_AROUND\nfloat directionalLightWeightingFull = max( dot( normal, dirVector ), 0.0 );\nfloat directionalLightWeightingHalf = max( 0.5 * dot( normal, dirVector ) + 0.5, 0.0 );\nvec3 dirDiffuseWeight = mix( vec3( directionalLightWeightingFull ), vec3( directionalLightWeightingHalf ), wrapRGB );\n#else\nfloat dirDiffuseWeight = max( dot( normal, dirVector ), 0.0 );\n#endif\ndirDiffuse += directionalLightColor[ i ] * uDiffuseColor * dirDiffuseWeight;\nvec3 dirHalfVector = normalize( dirVector + viewPosition );\nfloat dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );\nfloat dirSpecularWeight = specularTex.r * max( pow( dirDotNormalHalf, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( dirVector, dirHalfVector ), 5.0 );\ndirSpecular += schlick * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization;\n#else\ndirSpecular += directionalLightColor[ i ] * uSpecularColor * dirSpecularWeight * dirDiffuseWeight;\n#endif\n}\n#endif\n#if MAX_HEMI_LIGHTS > 0\nvec3 hemiDiffuse  = vec3( 0.0 );\nvec3 hemiSpecular = vec3( 0.0 );\nfor( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {\nvec4 lPosition = viewMatrix * vec4( hemisphereLightPosition[ i ], 1.0 );\nvec3 lVector = normalize( lPosition.xyz + vViewPosition.xyz );\nfloat dotProduct = dot( normal, lVector );\nfloat hemiDiffuseWeight = 0.5 * dotProduct + 0.5;\nhemiDiffuse += uDiffuseColor * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );\nfloat hemiSpecularWeight = 0.0;\nvec3 hemiHalfVectorSky = normalize( lVector + viewPosition );\nfloat hemiDotNormalHalfSky = 0.5 * dot( normal, hemiHalfVectorSky ) + 0.5;\nhemiSpecularWeight += specularTex.r * max( pow( hemiDotNormalHalfSky, uShininess ), 0.0 );\nvec3 lVectorGround = normalize( -lPosition.xyz + vViewPosition.xyz );\nvec3 hemiHalfVectorGround = normalize( lVectorGround + viewPosition );\nfloat hemiDotNormalHalfGround = 0.5 * dot( normal, hemiHalfVectorGround ) + 0.5;\nhemiSpecularWeight += specularTex.r * max( pow( hemiDotNormalHalfGround, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlickSky = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVector, hemiHalfVectorSky ), 5.0 );\nvec3 schlickGround = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVectorGround, hemiHalfVectorGround ), 5.0 );\nhemiSpecular += ( schlickSky + schlickGround ) * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight ) * hemiSpecularWeight * hemiDiffuseWeight * specularNormalization;\n#else\nhemiSpecular += uSpecularColor * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight ) * hemiSpecularWeight * hemiDiffuseWeight;\n#endif\n}\n#endif\nvec3 totalDiffuse = vec3( 0.0 );\nvec3 totalSpecular = vec3( 0.0 );\n#if MAX_DIR_LIGHTS > 0\ntotalDiffuse += dirDiffuse;\ntotalSpecular += dirSpecular;\n#endif\n#if MAX_HEMI_LIGHTS > 0\ntotalDiffuse += hemiDiffuse;\ntotalSpecular += hemiSpecular;\n#endif\n#if MAX_POINT_LIGHTS > 0\ntotalDiffuse += pointDiffuse;\ntotalSpecular += pointSpecular;\n#endif\n#if MAX_SPOT_LIGHTS > 0\ntotalDiffuse += spotDiffuse;\ntotalSpecular += spotSpecular;\n#endif\n#ifdef METAL\ngl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor + totalSpecular );\n#else\ngl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor ) + totalSpecular;\n#endif\nif ( enableReflection ) {\nvec3 vReflect;\nvec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );\nif ( useRefract ) {\nvReflect = refract( cameraToVertex, normal, uRefractionRatio );\n} else {\nvReflect = reflect( cameraToVertex, normal );\n}\nvec4 cubeColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );\n#ifdef GAMMA_INPUT\ncubeColor.xyz *= cubeColor.xyz;\n#endif\ngl_FragColor.xyz = mix( gl_FragColor.xyz, cubeColor.xyz, specularTex.r * uReflectivity );\n}",
+THREE.ShaderChunk.shadowmap_pars_fragment,THREE.ShaderChunk.fog_pars_fragment,"void main() {\nvec3 vViewPosition = cameraPosition - vWorldPosition;\ngl_FragColor = vec4( vec3( 1.0 ), uOpacity );\nvec3 specularTex = vec3( 1.0 );\nvec3 normalTex = texture2D( tNormal, vUv ).xyz * 2.0 - 1.0;\nnormalTex.xy *= uNormalScale;\nnormalTex = normalize( normalTex );\nif( enableDiffuse ) {\n#ifdef GAMMA_INPUT\nvec4 texelColor = texture2D( tDiffuse, vUv );\ntexelColor.xyz *= texelColor.xyz;\ngl_FragColor = gl_FragColor * texelColor;\n#else\ngl_FragColor = gl_FragColor * texture2D( tDiffuse, vUv );\n#endif\n}\nif( enableAO ) {\n#ifdef GAMMA_INPUT\nvec4 aoColor = texture2D( tAO, vUv );\naoColor.xyz *= aoColor.xyz;\ngl_FragColor.xyz = gl_FragColor.xyz * aoColor.xyz;\n#else\ngl_FragColor.xyz = gl_FragColor.xyz * texture2D( tAO, vUv ).xyz;\n#endif\n}\nif( enableSpecular )\nspecularTex = texture2D( tSpecular, vUv ).xyz;\nmat3 tsb = mat3( normalize( vTangent ), normalize( vBinormal ), normalize( vNormal ) );\nvec3 finalNormal = tsb * normalTex;\n#ifdef FLIP_SIDED\nfinalNormal = -finalNormal;\n#endif\nvec3 normal = normalize( finalNormal );\nvec3 viewPosition = normalize( vViewPosition );\n#if MAX_POINT_LIGHTS > 0\nvec3 pointDiffuse = vec3( 0.0 );\nvec3 pointSpecular = vec3( 0.0 );\nfor ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {\nvec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );\nvec3 pointVector = lPosition.xyz + vViewPosition.xyz;\nfloat pointDistance = 1.0;\nif ( pointLightDistance[ i ] > 0.0 )\npointDistance = 1.0 - min( ( length( pointVector ) / pointLightDistance[ i ] ), 1.0 );\npointVector = normalize( pointVector );\n#ifdef WRAP_AROUND\nfloat pointDiffuseWeightFull = max( dot( normal, pointVector ), 0.0 );\nfloat pointDiffuseWeightHalf = max( 0.5 * dot( normal, pointVector ) + 0.5, 0.0 );\nvec3 pointDiffuseWeight = mix( vec3 ( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), wrapRGB );\n#else\nfloat pointDiffuseWeight = max( dot( normal, pointVector ), 0.0 );\n#endif\npointDiffuse += pointDistance * pointLightColor[ i ] * uDiffuseColor * pointDiffuseWeight;\nvec3 pointHalfVector = normalize( pointVector + viewPosition );\nfloat pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );\nfloat pointSpecularWeight = specularTex.r * max( pow( pointDotNormalHalf, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( pointVector, pointHalfVector ), 5.0 );\npointSpecular += schlick * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * pointDistance * specularNormalization;\n#else\npointSpecular += pointDistance * pointLightColor[ i ] * uSpecularColor * pointSpecularWeight * pointDiffuseWeight;\n#endif\n}\n#endif\n#if MAX_SPOT_LIGHTS > 0\nvec3 spotDiffuse = vec3( 0.0 );\nvec3 spotSpecular = vec3( 0.0 );\nfor ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {\nvec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );\nvec3 spotVector = lPosition.xyz + vViewPosition.xyz;\nfloat spotDistance = 1.0;\nif ( spotLightDistance[ i ] > 0.0 )\nspotDistance = 1.0 - min( ( length( spotVector ) / spotLightDistance[ i ] ), 1.0 );\nspotVector = normalize( spotVector );\nfloat spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );\nif ( spotEffect > spotLightAngle[ i ] ) {\nspotEffect = pow( spotEffect, spotLightExponent[ i ] );\n#ifdef WRAP_AROUND\nfloat spotDiffuseWeightFull = max( dot( normal, spotVector ), 0.0 );\nfloat spotDiffuseWeightHalf = max( 0.5 * dot( normal, spotVector ) + 0.5, 0.0 );\nvec3 spotDiffuseWeight = mix( vec3 ( spotDiffuseWeightFull ), vec3( spotDiffuseWeightHalf ), wrapRGB );\n#else\nfloat spotDiffuseWeight = max( dot( normal, spotVector ), 0.0 );\n#endif\nspotDiffuse += spotDistance * spotLightColor[ i ] * uDiffuseColor * spotDiffuseWeight * spotEffect;\nvec3 spotHalfVector = normalize( spotVector + viewPosition );\nfloat spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );\nfloat spotSpecularWeight = specularTex.r * max( pow( spotDotNormalHalf, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( spotVector, spotHalfVector ), 5.0 );\nspotSpecular += schlick * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * spotDistance * specularNormalization * spotEffect;\n#else\nspotSpecular += spotDistance * spotLightColor[ i ] * uSpecularColor * spotSpecularWeight * spotDiffuseWeight * spotEffect;\n#endif\n}\n}\n#endif\n#if MAX_DIR_LIGHTS > 0\nvec3 dirDiffuse = vec3( 0.0 );\nvec3 dirSpecular = vec3( 0.0 );\nfor( int i = 0; i < MAX_DIR_LIGHTS; i++ ) {\nvec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );\nvec3 dirVector = normalize( lDirection.xyz );\n#ifdef WRAP_AROUND\nfloat directionalLightWeightingFull = max( dot( normal, dirVector ), 0.0 );\nfloat directionalLightWeightingHalf = max( 0.5 * dot( normal, dirVector ) + 0.5, 0.0 );\nvec3 dirDiffuseWeight = mix( vec3( directionalLightWeightingFull ), vec3( directionalLightWeightingHalf ), wrapRGB );\n#else\nfloat dirDiffuseWeight = max( dot( normal, dirVector ), 0.0 );\n#endif\ndirDiffuse += directionalLightColor[ i ] * uDiffuseColor * dirDiffuseWeight;\nvec3 dirHalfVector = normalize( dirVector + viewPosition );\nfloat dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );\nfloat dirSpecularWeight = specularTex.r * max( pow( dirDotNormalHalf, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( dirVector, dirHalfVector ), 5.0 );\ndirSpecular += schlick * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization;\n#else\ndirSpecular += directionalLightColor[ i ] * uSpecularColor * dirSpecularWeight * dirDiffuseWeight;\n#endif\n}\n#endif\n#if MAX_HEMI_LIGHTS > 0\nvec3 hemiDiffuse  = vec3( 0.0 );\nvec3 hemiSpecular = vec3( 0.0 );\nfor( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {\nvec4 lPosition = viewMatrix * vec4( hemisphereLightPosition[ i ], 1.0 );\nvec3 lVector = normalize( lPosition.xyz + vViewPosition.xyz );\nfloat dotProduct = dot( normal, lVector );\nfloat hemiDiffuseWeight = 0.5 * dotProduct + 0.5;\nhemiDiffuse += uDiffuseColor * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );\nfloat hemiSpecularWeight = 0.0;\nvec3 hemiHalfVectorSky = normalize( lVector + viewPosition );\nfloat hemiDotNormalHalfSky = 0.5 * dot( normal, hemiHalfVectorSky ) + 0.5;\nhemiSpecularWeight += specularTex.r * max( pow( hemiDotNormalHalfSky, uShininess ), 0.0 );\nvec3 lVectorGround = normalize( -lPosition.xyz + vViewPosition.xyz );\nvec3 hemiHalfVectorGround = normalize( lVectorGround + viewPosition );\nfloat hemiDotNormalHalfGround = 0.5 * dot( normal, hemiHalfVectorGround ) + 0.5;\nhemiSpecularWeight += specularTex.r * max( pow( hemiDotNormalHalfGround, uShininess ), 0.0 );\n#ifdef PHYSICALLY_BASED_SHADING\nfloat specularNormalization = ( uShininess + 2.0001 ) / 8.0;\nvec3 schlickSky = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVector, hemiHalfVectorSky ), 5.0 );\nvec3 schlickGround = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVectorGround, hemiHalfVectorGround ), 5.0 );\nhemiSpecular += ( schlickSky + schlickGround ) * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight ) * hemiSpecularWeight * hemiDiffuseWeight * specularNormalization;\n#else\nhemiSpecular += uSpecularColor * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight ) * hemiSpecularWeight * hemiDiffuseWeight;\n#endif\n}\n#endif\nvec3 totalDiffuse = vec3( 0.0 );\nvec3 totalSpecular = vec3( 0.0 );\n#if MAX_DIR_LIGHTS > 0\ntotalDiffuse += dirDiffuse;\ntotalSpecular += dirSpecular;\n#endif\n#if MAX_HEMI_LIGHTS > 0\ntotalDiffuse += hemiDiffuse;\ntotalSpecular += hemiSpecular;\n#endif\n#if MAX_POINT_LIGHTS > 0\ntotalDiffuse += pointDiffuse;\ntotalSpecular += pointSpecular;\n#endif\n#if MAX_SPOT_LIGHTS > 0\ntotalDiffuse += spotDiffuse;\ntotalSpecular += spotSpecular;\n#endif\n#ifdef METAL\ngl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor + totalSpecular );\n#else\ngl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor ) + totalSpecular;\n#endif\nif ( enableReflection ) {\nvec3 vReflect;\nvec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );\nif ( useRefract ) {\nvReflect = refract( cameraToVertex, normal, uRefractionRatio );\n} else {\nvReflect = reflect( cameraToVertex, normal );\n}\nvec4 cubeColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );\n#ifdef GAMMA_INPUT\ncubeColor.xyz *= cubeColor.xyz;\n#endif\ngl_FragColor.xyz = mix( gl_FragColor.xyz, cubeColor.xyz, specularTex.r * uReflectivity );\n}",
 THREE.ShaderChunk.shadowmap_fragment,THREE.ShaderChunk.linear_to_gamma_fragment,THREE.ShaderChunk.fog_fragment,"}"].join("\n"),vertexShader:["attribute vec4 tangent;\nuniform vec2 uOffset;\nuniform vec2 uRepeat;\nuniform bool enableDisplacement;\n#ifdef VERTEX_TEXTURES\nuniform sampler2D tDisplacement;\nuniform float uDisplacementScale;\nuniform float uDisplacementBias;\n#endif\nvarying vec3 vTangent;\nvarying vec3 vBinormal;\nvarying vec3 vNormal;\nvarying vec2 vUv;\nvarying vec3 vWorldPosition;",
 THREE.ShaderChunk.skinning_pars_vertex,THREE.ShaderChunk.shadowmap_pars_vertex,"void main() {",THREE.ShaderChunk.skinbase_vertex,THREE.ShaderChunk.skinnormal_vertex,"#ifdef USE_SKINNING\nvNormal = normalMatrix * skinnedNormal.xyz;\nvec4 skinnedTangent = skinMatrix * vec4( tangent.xyz, 0.0 );\nvTangent = normalMatrix * skinnedTangent.xyz;\n#else\nvNormal = normalMatrix * normal;\nvTangent = normalMatrix * tangent.xyz;\n#endif\nvBinormal = cross( vNormal, vTangent ) * tangent.w;\nvUv = uv * uRepeat + uOffset;\nvec3 displacedPosition;\n#ifdef VERTEX_TEXTURES\nif ( enableDisplacement ) {\nvec3 dv = texture2D( tDisplacement, uv ).xyz;\nfloat df = uDisplacementScale * dv.x + uDisplacementBias;\ndisplacedPosition = position + normalize( normal ) * df;\n} else {\n#ifdef USE_SKINNING\nvec4 skinVertex = vec4( position, 1.0 );\nvec4 skinned  = boneMatX * skinVertex * skinWeight.x;\nskinned \t  += boneMatY * skinVertex * skinWeight.y;\ndisplacedPosition  = skinned.xyz;\n#else\ndisplacedPosition = position;\n#endif\n}\n#else\n#ifdef USE_SKINNING\nvec4 skinVertex = vec4( position, 1.0 );\nvec4 skinned  = boneMatX * skinVertex * skinWeight.x;\nskinned \t  += boneMatY * skinVertex * skinWeight.y;\ndisplacedPosition  = skinned.xyz;\n#else\ndisplacedPosition = position;\n#endif\n#endif\nvec4 mvPosition = modelViewMatrix * vec4( displacedPosition, 1.0 );\nvec4 mPosition = modelMatrix * vec4( displacedPosition, 1.0 );\ngl_Position = projectionMatrix * mvPosition;\nvWorldPosition = mPosition.xyz;\n#ifdef USE_SHADOWMAP\nfor( int i = 0; i < MAX_SHADOWS; i ++ ) {\nvShadowCoord[ i ] = shadowMatrix[ i ] * mPosition;\n}\n#endif\n}"].join("\n")},
 cube:{uniforms:{tCube:{type:"t",value:null},tFlip:{type:"f",value:-1}},vertexShader:"varying vec3 vViewPosition;\nvoid main() {\nvec4 mPosition = modelMatrix * vec4( position, 1.0 );\nvViewPosition = cameraPosition - mPosition.xyz;\ngl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}",fragmentShader:"uniform samplerCube tCube;\nuniform float tFlip;\nvarying vec3 vViewPosition;\nvoid main() {\nvec3 wPos = cameraPosition - vViewPosition;\ngl_FragColor = textureCube( tCube, vec3( tFlip * wPos.x, wPos.yz ) );\n}"}}});

src/extras/ShaderUtils.js

@@ -275,6 +275,12 @@ THREE.ShaderUtils = {
 					"mat3 tsb = mat3( normalize( vTangent ), normalize( vBinormal ), normalize( vNormal ) );",
 					"vec3 finalNormal = tsb * normalTex;",
 
+					"#ifdef FLIP_SIDED",
+
+						"finalNormal = -finalNormal;",
+
+					"#endif",
+
 					"vec3 normal = normalize( finalNormal );",
 					"vec3 viewPosition = normalize( vViewPosition );",