precision highp float;

// Attributes
attribute vec3 position;
#ifdef NORMAL
attribute vec3 normal;
#endif
#ifdef UV1
attribute vec2 uv;
#endif
#ifdef UV2
attribute vec2 uv2;
#endif
#ifdef VERTEXCOLOR
attribute vec4 color;
#endif
#if NUM_BONE_INFLUENCERS > 0
uniform mat4 mBones[BonesPerMesh];

attribute vec4 matricesIndices;
attribute vec4 matricesWeights;
#if NUM_BONE_INFLUENCERS > 4
attribute vec4 matricesIndicesExtra;
attribute vec4 matricesWeightsExtra;
#endif
#endif

// Uniforms

#ifdef INSTANCES
attribute vec4 world0;
attribute vec4 world1;
attribute vec4 world2;
attribute vec4 world3;
#else
uniform mat4 world;
#endif

uniform mat4 view;
uniform mat4 viewProjection;

#ifdef ALBEDO
varying vec2 vAlbedoUV;
uniform mat4 albedoMatrix;
uniform vec2 vAlbedoInfos;
#endif

#ifdef AMBIENT
varying vec2 vAmbientUV;
uniform mat4 ambientMatrix;
uniform vec2 vAmbientInfos;
#endif

#ifdef OPACITY
varying vec2 vOpacityUV;
uniform mat4 opacityMatrix;
uniform vec2 vOpacityInfos;
#endif

#ifdef EMISSIVE
varying vec2 vEmissiveUV;
uniform vec2 vEmissiveInfos;
uniform mat4 emissiveMatrix;
#endif

#ifdef LIGHTMAP
varying vec2 vLightmapUV;
uniform vec2 vLightmapInfos;
uniform mat4 lightmapMatrix;
#endif

#if defined(REFLECTIVITY)
varying vec2 vReflectivityUV;
uniform vec2 vReflectivityInfos;
uniform mat4 reflectivityMatrix;
#endif

#ifdef BUMP
varying vec2 vBumpUV;
uniform vec2 vBumpInfos;
uniform mat4 bumpMatrix;
#endif

#ifdef POINTSIZE
uniform float pointSize;
#endif

// Output
varying vec3 vPositionW;
#ifdef NORMAL
varying vec3 vNormalW;
#endif

#ifdef VERTEXCOLOR
varying vec4 vColor;
#endif

#ifdef CLIPPLANE
uniform vec4 vClipPlane;
varying float fClipDistance;
#endif

#ifdef FOG
varying float fFogDistance;
#endif

#ifdef SHADOWS
#if defined(SPOTLIGHT0) || defined(DIRLIGHT0)
uniform mat4 lightMatrix0;
varying vec4 vPositionFromLight0;
#endif
#if defined(SPOTLIGHT1) || defined(DIRLIGHT1)
uniform mat4 lightMatrix1;
varying vec4 vPositionFromLight1;
#endif
#if defined(SPOTLIGHT2) || defined(DIRLIGHT2)
uniform mat4 lightMatrix2;
varying vec4 vPositionFromLight2;
#endif
#if defined(SPOTLIGHT3) || defined(DIRLIGHT3)
uniform mat4 lightMatrix3;
varying vec4 vPositionFromLight3;
#endif
#endif

#ifdef REFLECTIONMAP_SKYBOX
varying vec3 vPositionUVW;
#endif

#ifdef REFLECTIONMAP_EQUIRECTANGULAR
varying vec3 vDirectionW;
#endif

#ifdef LOGARITHMICDEPTH
uniform float logarithmicDepthConstant;
varying float vFragmentDepth;
#endif

void main(void) {

#ifdef REFLECTIONMAP_SKYBOX
    vPositionUVW = position;
#endif 

#ifdef INSTANCES
    mat4 finalWorld = mat4(world0, world1, world2, world3);
#else
    mat4 finalWorld = world;
#endif

#if NUM_BONE_INFLUENCERS > 0
    mat4 influence;
    influence = mBones[int(matricesIndices[0])] * matricesWeights[0];

#if NUM_BONE_INFLUENCERS > 1
    influence += mBones[int(matricesIndices[1])] * matricesWeights[1];
#endif 
#if NUM_BONE_INFLUENCERS > 2
    influence += mBones[int(matricesIndices[2])] * matricesWeights[2];
#endif	
#if NUM_BONE_INFLUENCERS > 3
    influence += mBones[int(matricesIndices[3])] * matricesWeights[3];
#endif	

#if NUM_BONE_INFLUENCERS > 4
    influence += mBones[int(matricesIndicesExtra[0])] * matricesWeightsExtra[0];
#endif
#if NUM_BONE_INFLUENCERS > 5
    influence += mBones[int(matricesIndicesExtra[1])] * matricesWeightsExtra[1];
#endif	
#if NUM_BONE_INFLUENCERS > 6
    influence += mBones[int(matricesIndicesExtra[2])] * matricesWeightsExtra[2];
#endif	
#if NUM_BONE_INFLUENCERS > 7
    influence += mBones[int(matricesIndicesExtra[3])] * matricesWeightsExtra[3];
#endif	

    finalWorld = finalWorld * influence;
#endif

    gl_Position = viewProjection * finalWorld * vec4(position, 1.0);

    vec4 worldPos = finalWorld * vec4(position, 1.0);
    vPositionW = vec3(worldPos);

#ifdef NORMAL
    vNormalW = normalize(vec3(finalWorld * vec4(normal, 0.0)));
#endif

#ifdef REFLECTIONMAP_EQUIRECTANGULAR
    vDirectionW = normalize(vec3(finalWorld * vec4(position, 0.0)));
#endif

    // Texture coordinates
#ifndef UV1
    vec2 uv = vec2(0., 0.);
#endif
#ifndef UV2
    vec2 uv2 = vec2(0., 0.);
#endif

#ifdef ALBEDO
    if (vAlbedoInfos.x == 0.)
    {
        vAlbedoUV = vec2(albedoMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vAlbedoUV = vec2(albedoMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

#ifdef AMBIENT
    if (vAmbientInfos.x == 0.)
    {
        vAmbientUV = vec2(ambientMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vAmbientUV = vec2(ambientMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

#ifdef OPACITY
    if (vOpacityInfos.x == 0.)
    {
        vOpacityUV = vec2(opacityMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vOpacityUV = vec2(opacityMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

#ifdef EMISSIVE
    if (vEmissiveInfos.x == 0.)
    {
        vEmissiveUV = vec2(emissiveMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vEmissiveUV = vec2(emissiveMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

#ifdef LIGHTMAP
    if (vLightmapInfos.x == 0.)
    {
        vLightmapUV = vec2(lightmapMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vLightmapUV = vec2(lightmapMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

#if defined(REFLECTIVITY)
    if (vReflectivityInfos.x == 0.)
    {
        vReflectivityUV = vec2(reflectivityMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vReflectivityUV = vec2(reflectivityMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

#ifdef BUMP
    if (vBumpInfos.x == 0.)
    {
        vBumpUV = vec2(bumpMatrix * vec4(uv, 1.0, 0.0));
    }
    else
    {
        vBumpUV = vec2(bumpMatrix * vec4(uv2, 1.0, 0.0));
    }
#endif

    // Clip plane
#ifdef CLIPPLANE
    fClipDistance = dot(worldPos, vClipPlane);
#endif

    // Fog
#ifdef FOG
    fFogDistance = (view * worldPos).z;
#endif

    // Shadows
#ifdef SHADOWS
#if defined(SPOTLIGHT0) || defined(DIRLIGHT0)
    vPositionFromLight0 = lightMatrix0 * worldPos;
#endif
#if defined(SPOTLIGHT1) || defined(DIRLIGHT1)
    vPositionFromLight1 = lightMatrix1 * worldPos;
#endif
#if defined(SPOTLIGHT2) || defined(DIRLIGHT2)
    vPositionFromLight2 = lightMatrix2 * worldPos;
#endif
#if defined(SPOTLIGHT3) || defined(DIRLIGHT3)
    vPositionFromLight3 = lightMatrix3 * worldPos;
#endif
#endif

    // Vertex color
#ifdef VERTEXCOLOR
    vColor = color;
#endif

    // Point size
#ifdef POINTSIZE
    gl_PointSize = pointSize;
#endif

    // Log. depth
#ifdef LOGARITHMICDEPTH
    vFragmentDepth = 1.0 + gl_Position.w;
    gl_Position.z = log2(max(0.000001, vFragmentDepth)) * logarithmicDepthConstant;
#endif
}