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@@ -23576,6 +23576,14 @@ THREE.ShaderUtils = {
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"#endif",
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+ "#if MAX_HEMI_LIGHTS > 0",
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+
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+ "uniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];",
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+ "uniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];",
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+ "uniform vec3 hemisphereLightPosition[ MAX_HEMI_LIGHTS ];",
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+
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+ "#endif",
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+
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"#if MAX_POINT_LIGHTS > 0",
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"uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];",
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@@ -23843,6 +23851,61 @@ THREE.ShaderUtils = {
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"#endif",
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+ // hemisphere lights
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+
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+ "#if MAX_HEMI_LIGHTS > 0",
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+
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+ "vec3 hemiDiffuse = vec3( 0.0 );",
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+ "vec3 hemiSpecular = vec3( 0.0 );" ,
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+
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+ "for( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {",
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+
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+ "vec4 lPosition = viewMatrix * vec4( hemisphereLightPosition[ i ], 1.0 );",
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+ "vec3 lVector = normalize( lPosition.xyz + vViewPosition.xyz );",
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+
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+ // diffuse
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+
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+ "float dotProduct = dot( normal, lVector );",
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+ "float hemiDiffuseWeight = 0.5 * dotProduct + 0.5;",
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+
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+ "hemiDiffuse += uDiffuseColor * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );",
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+
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+ // specular (sky light)
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+
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+ "float hemiSpecularWeight = 0.0;",
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+
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+ "vec3 hemiHalfVectorSky = normalize( lVector + viewPosition );",
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+ "float hemiDotNormalHalfSky = 0.5 * dot( normal, hemiHalfVectorSky ) + 0.5;",
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+ "hemiSpecularWeight += specularTex.r * max( pow( hemiDotNormalHalfSky, uShininess ), 0.0 );",
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+
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+ // specular (ground light)
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+
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+ "vec3 lVectorGround = normalize( -lPosition.xyz + vViewPosition.xyz );",
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+
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+ "vec3 hemiHalfVectorGround = normalize( lVectorGround + viewPosition );",
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+ "float hemiDotNormalHalfGround = 0.5 * dot( normal, hemiHalfVectorGround ) + 0.5;",
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+ "hemiSpecularWeight += specularTex.r * max( pow( hemiDotNormalHalfGround, uShininess ), 0.0 );",
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+
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+ "#ifdef PHYSICALLY_BASED_SHADING",
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+
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+ // 2.0 => 2.0001 is hack to work around ANGLE bug
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+
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+ "float specularNormalization = ( uShininess + 2.0001 ) / 8.0;",
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+
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+ "vec3 schlickSky = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVector, hemiHalfVectorSky ), 5.0 );",
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+ "vec3 schlickGround = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVectorGround, hemiHalfVectorGround ), 5.0 );",
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+ "hemiSpecular += ( schlickSky + schlickGround ) * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight ) * hemiSpecularWeight * hemiDiffuseWeight * specularNormalization;",
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+
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+ "#else",
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+
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+ "hemiSpecular += uSpecularColor * mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight ) * hemiSpecularWeight * hemiDiffuseWeight;",
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+
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+ "#endif",
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+
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+ "}",
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+
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+ "#endif",
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+
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// all lights contribution summation
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"vec3 totalDiffuse = vec3( 0.0 );",
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@@ -23855,6 +23918,13 @@ THREE.ShaderUtils = {
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"#endif",
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+ "#if MAX_HEMI_LIGHTS > 0",
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+
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+ "totalDiffuse += hemiDiffuse;",
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+ "totalSpecular += hemiSpecular;",
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+
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+ "#endif",
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+
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"#if MAX_POINT_LIGHTS > 0",
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"totalDiffuse += pointDiffuse;",
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alteredq