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":"#extension GL_EXT_shader_explicit_arithmetic_types_int32: require\nprecision highp float;\n#define QUATER_PI         0.78539816340\n#define HALF_PI           1.57079632679\n#define PI                3.14159265359\n#define PI2               6.28318530718\n#define PI4               12.5663706144\n#define INV_QUATER_PI     1.27323954474\n#define INV_HALF_PI       0.63661977237\n#define INV_PI            0.31830988618\n#define INV_PI2           0.15915494309\n#define INV_PI4           0.07957747155\n#define EPSILON           1e-6\n#define EPSILON_LOWP      1e-4\n#define LOG2              1.442695\n#define EXP_VALUE         2.71828183f\n#define FP_MAX            65504.0\n#define FP_SCALE          0.0009765625\n#define FP_SCALE_INV      1024.0\n#define GRAY_VECTOR       vec3(0.299, 0.587, 0.114)\nhighp float decode32 (highp vec4 rgba) {\n  rgba = rgba * 255.0;\n  highp float Sign = 1.0 - (step(128.0, (rgba[3]) + 0.5)) * 2.0;\n  highp float Exponent = 2.0 * (mod(float(int((rgba[3]) + 0.5)), 128.0)) + (step(128.0, (rgba[2]) + 0.5)) - 127.0;\n  highp float Mantissa = (mod(float(int((rgba[2]) + 0.5)), 128.0)) * 65536.0 + rgba[1] * 256.0 + rgba[0] + 8388608.0;\n  return Sign * exp2(Exponent - 23.0) * Mantissa;\n}\nstruct StandardVertInput {\n  highp vec4 position;\n  vec3 normal;\n  vec4 tangent;\n};\nlayout(location = 0) in vec3 a_position;\nlayout(location = 1) in vec3 a_normal;\nlayout(location = 2) in vec2 a_texCoord;\nlayout(location = 3) in vec4 a_tangent;\n#if CC_USE_SKINNING\n    layout(location = 4) in u32vec4 a_joints;\n  layout(location = 5) in vec4 a_weights;\n#endif\n#if USE_INSTANCING\n  #if CC_USE_BAKED_ANIMATION\n    layout(location = 6) in highp vec4 a_jointAnimInfo;\n  #endif\n  layout(location = 7) in vec4 a_matWorld0;\n  layout(location = 8) in vec4 a_matWorld1;\n  layout(location = 9) in vec4 a_matWorld2;\n  #if CC_USE_LIGHTMAP\n    layout(location = 10) in vec4 a_lightingMapUVParam;\n  #endif\n  #if CC_RECEIVE_SHADOW\n    layout(location = 11) in vec2 a_localShadowBias;\n  #endif\n#elif USE_BATCHING\n  layout(location = 12) in float a_dyn_batch_id;\n#endif\n#if CC_USE_MORPH\n    int getVertexId() {\n      return gl_VertexIndex;\n    }\n#endif\n#if CC_USE_MORPH\n  layout(set = 2, binding = 4) uniform CCMorph {\n    vec4 cc_displacementWeights[15];\n    vec4 cc_displacementTextureInfo;\n  };\n  vec2 getPixelLocation(vec2 textureResolution, int pixelIndex) {\n    float pixelIndexF = float(pixelIndex);\n    float x = mod(pixelIndexF, textureResolution.x);\n    float y = floor(pixelIndexF / textureResolution.x);\n    return vec2(x, y);\n  }\n  vec2 getPixelCoordFromLocation(vec2 location, vec2 textureResolution) {\n    return (vec2(location.x, location.y) + .5) / textureResolution;\n  }\n  #if CC_DEVICE_SUPPORT_FLOAT_TEXTURE\n      vec4 fetchVec3ArrayFromTexture(sampler2D tex, int pixelIndex) {\n        ivec2 texSize = textureSize(tex, 0);\n        return texelFetch(tex, ivec2(pixelIndex % texSize.x, pixelIndex / texSize.x), 0);\n      }\n  #else\n    vec4 fetchVec3ArrayFromTexture(sampler2D tex, int elementIndex) {\n      int pixelIndex = elementIndex * 4;\n      vec2 location = getPixelLocation(cc_displacementTextureInfo.xy, pixelIndex);\n      vec2 x = getPixelCoordFromLocation(location + vec2(0.0, 0.0), cc_displacementTextureInfo.xy);\n      vec2 y = getPixelCoordFromLocation(location + vec2(1.0, 0.0), cc_displacementTextureInfo.xy);\n      vec2 z = getPixelCoordFromLocation(location + vec2(2.0, 0.0), cc_displacementTextureInfo.xy);\n      return vec4(\n        decode32(texture(tex, x)),\n        decode32(texture(tex, y)),\n        decode32(texture(tex, z)),\n        1.0\n      );\n    }\n  #endif\n  float getDisplacementWeight(int index) {\n    int quot = index / 4;\n    int remainder = index - quot * 4;\n    if (remainder == 0) {\n      return cc_displacementWeights[quot].x;\n    } else if (remainder == 1) {\n      return cc_displacementWeights[quot].y;\n    } else if (remainder == 2) {\n      return cc_displacementWeights[quot].z;\n    } else {\n      return cc_displacementWeights[quot].w;\n    }\n  }\n  vec3 getVec3DisplacementFromTexture(sampler2D tex, int vertexIndex) {\n  #if CC_MORPH_PRECOMPUTED\n    return fetchVec3ArrayFromTexture(tex, vertexIndex).rgb;\n  #else\n    vec3 result = vec3(0, 0, 0);\n    int nVertices = int(cc_displacementTextureInfo.z);\n    for (int iTarget = 0; iTarget < CC_MORPH_TARGET_COUNT; ++iTarget) {\n      result += (fetchVec3ArrayFromTexture(tex, nVertices * iTarget + vertexIndex).rgb * getDisplacementWeight(iTarget));\n    }\n    return result;\n  #endif\n  }\n  #if CC_MORPH_TARGET_HAS_POSITION\n    layout(set = 2, binding = 7) uniform sampler2D cc_PositionDisplacements;\n    vec3 getPositionDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_PositionDisplacements, vertexId);\n    }\n  #endif\n  #if CC_MORPH_TARGET_HAS_NORMAL\n    layout(set = 2, binding = 8) uniform sampler2D cc_NormalDisplacements;\n    vec3 getNormalDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_NormalDisplacements, vertexId);\n    }\n  #endif\n  #if CC_MORPH_TARGET_HAS_TANGENT\n    layout(set = 2, binding = 9) uniform sampler2D cc_TangentDisplacements;\n    vec3 getTangentDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_TangentDisplacements, vertexId);\n    }\n  #endif\n  void applyMorph (inout vec4 position, inout vec3 normal, inout vec4 tangent) {\n    int vertexId = getVertexId();\n  #if CC_MORPH_TARGET_HAS_POSITION\n    position.xyz = position.xyz + getPositionDisplacement(vertexId);\n  #endif\n  #if CC_MORPH_TARGET_HAS_NORMAL\n    normal.xyz = normal.xyz + getNormalDisplacement(vertexId);\n  #endif\n  #if CC_MORPH_TARGET_HAS_TANGENT\n    tangent.xyz = tangent.xyz + getTangentDisplacement(vertexId);\n  #endif\n  }\n  void applyMorph (inout vec4 position) {\n  #if CC_MORPH_TARGET_HAS_POSITION\n    position.xyz = position.xyz + getPositionDisplacement(getVertexId());\n  #endif\n  }\n#endif\n#if CC_USE_SKINNING\n  #if CC_USE_BAKED_ANIMATION\n    layout(set = 2, binding = 3) uniform CCSkinningTexture {\n      highp vec4 cc_jointTextureInfo;\n    };\n    layout(set = 2, binding = 2) uniform CCSkinningAnimation {\n      highp vec4 cc_jointAnimInfo;\n    };\n    layout(set = 2, binding = 6) uniform highp sampler2D cc_jointTexture;\n    void CCGetJointTextureCoords(float pixelsPerJoint, float jointIdx, out highp float x, out highp float y, out highp float invSize)\n    {\n      #if USE_INSTANCING\n        highp float temp = pixelsPerJoint * (a_jointAnimInfo.x * a_jointAnimInfo.y + jointIdx) + a_jointAnimInfo.z;\n      #else\n        highp float temp = pixelsPerJoint * (cc_jointAnimInfo.x * cc_jointTextureInfo.y + jointIdx) + cc_jointTextureInfo.z;\n      #endif\n      invSize = cc_jointTextureInfo.w;\n      highp float tempY = floor(temp * invSize);\n      x = floor(temp - tempY * cc_jointTextureInfo.x);\n      y = (tempY + 0.5) * invSize;\n    }\n  #else\n    layout(set = 2, binding = 3) uniform CCSkinning {\n      highp vec4 cc_joints[30 * 3];\n    };\n  #endif\n  #if CC_USE_BAKED_ANIMATION\n    #if CC_DEVICE_SUPPORT_FLOAT_TEXTURE\n      mat4 getJointMatrix (float i) {\n        highp float x, y, invSize;\n        CCGetJointTextureCoords(3.0, i, x, y, invSize);\n        vec4 v1 = texture(cc_jointTexture, vec2((x + 0.5) * invSize, y));\n        vec4 v2 = texture(cc_jointTexture, vec2((x + 1.5) * invSize, y));\n        vec4 v3 = texture(cc_jointTexture, vec2((x + 2.5) * invSize, y));\n        return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n      }\n    #else\n      mat4 getJointMatrix (float i) {\n        highp float x, y, invSize;\n        CCGetJointTextureCoords(12.0, i, x, y, invSize);\n        vec4 v1 = vec4(\n          decode32(texture(cc_jointTexture, vec2((x + 0.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 1.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 2.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 3.5) * invSize, y)))\n        );\n        vec4 v2 = vec4(\n          decode32(texture(cc_jointTexture, vec2((x + 4.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 5.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 6.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 7.5) * invSize, y)))\n        );\n        vec4 v3 = vec4(\n          decode32(texture(cc_jointTexture, vec2((x + 8.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 9.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 10.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 11.5) * invSize, y)))\n        );\n        return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n      }\n    #endif\n  #else\n    mat4 getJointMatrix (float i) {\n      int idx = int(i);\n      vec4 v1 = cc_joints[idx * 3];\n      vec4 v2 = cc_joints[idx * 3 + 1];\n      vec4 v3 = cc_joints[idx * 3 + 2];\n      return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n    }\n  #endif\n  mat4 skinMatrix () {\n    vec4 joints = vec4(a_joints);\n    return getJointMatrix(joints.x) * a_weights.x\n         + getJointMatrix(joints.y) * a_weights.y\n         + getJointMatrix(joints.z) * a_weights.z\n         + getJointMatrix(joints.w) * a_weights.w;\n  }\n  void CCSkin (inout vec4 position) {\n    mat4 m = skinMatrix();\n    position = m * position;\n  }\n  void CCSkin (inout vec4 position, inout vec3 normal, inout vec4 tangent) {\n    mat4 m = skinMatrix();\n    position = m * position;\n    normal = (m * vec4(normal, 0.0)).xyz;\n    tangent.xyz = (m * vec4(tangent.xyz, 0.0)).xyz;\n  }\n#endif\nvoid CCVertInput(inout vec4 In)\n{\n    In = vec4(a_position, 1.0);\n  #if CC_USE_MORPH\n    applyMorph(In);\n  #endif\n  #if CC_USE_SKINNING\n    CCSkin(In);\n  #endif\n}\nlayout(set = 0, binding = 0) uniform CCGlobal {\n  highp   vec4 cc_time;\n  mediump vec4 cc_screenSize;\n  mediump vec4 cc_nativeSize;\n};\nlayout(set = 0, binding = 1) uniform CCCamera {\n  highp   mat4 cc_matView;\n  highp   mat4 cc_matViewInv;\n  highp   mat4 cc_matProj;\n  highp   mat4 cc_matProjInv;\n  highp   mat4 cc_matViewProj;\n  highp   mat4 cc_matViewProjInv;\n  highp   vec4 cc_cameraPos;\n  mediump vec4 cc_screenScale;\n  mediump vec4 cc_exposure;\n  mediump vec4 cc_mainLitDir;\n  mediump vec4 cc_mainLitColor;\n  mediump vec4 cc_ambientSky;\n  mediump vec4 cc_ambientGround;\n  mediump vec4 cc_fogColor;\n  mediump vec4 cc_fogBase;\n  mediump vec4 cc_fogAdd;\n  mediump vec4 cc_nearFar;\n  mediump vec4 cc_viewPort;\n};\n#if !USE_INSTANCING\n  #if USE_BATCHING\n    layout(set = 2, binding = 0) uniform CCLocalBatched {\n      highp mat4 cc_matWorlds[10];\n    };\n  #else\n    layout(set = 2, binding = 0) uniform CCLocal {\n      highp mat4 cc_matWorld;\n      highp mat4 cc_matWorldIT;\n      highp vec4 cc_lightingMapUVParam;\n      highp vec4 cc_localShadowBias;\n    };\n  #endif\n#endif\nvoid CCGetWorldMatrix(out mat4 matWorld)\n{\n  #if USE_INSTANCING\n    matWorld = mat4(\n      vec4(a_matWorld0.xyz, 0.0),\n      vec4(a_matWorld1.xyz, 0.0),\n      vec4(a_matWorld2.xyz, 0.0),\n      vec4(a_matWorld0.w, a_matWorld1.w, a_matWorld2.w, 1.0)\n    );\n  #elif USE_BATCHING\n    matWorld = cc_matWorlds[int(a_dyn_batch_id)];\n  #else\n    matWorld = cc_matWorld;\n  #endif\n}\nfloat LinearFog(vec4 pos) {\n  vec4 wPos = pos;\n  float cam_dis = distance(cc_cameraPos, wPos);\n  float fogStart = cc_fogBase.x;\n  float fogEnd = cc_fogBase.y;\n  return clamp((fogEnd - cam_dis) / (fogEnd - fogStart), 0., 1.);\n}\nfloat ExpFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * fogDensity);\n  return f;\n}\nfloat ExpSquaredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * cam_dis * fogDensity * fogDensity);\n  return f;\n}\nfloat LayeredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float _FogTop = cc_fogAdd.x;\n  float _FogRange = cc_fogAdd.y;\n  vec3 camWorldProj = cc_cameraPos.xyz;\n  camWorldProj.y = 0.;\n  vec3 worldPosProj = wPos.xyz;\n  worldPosProj.y = 0.;\n  float fDeltaD = distance(worldPosProj, camWorldProj) / fogAtten * 2.0;\n  float fDeltaY, fDensityIntegral;\n  if (cc_cameraPos.y > _FogTop) {\n    if (wPos.y < _FogTop) {\n      fDeltaY = (_FogTop - wPos.y) / _FogRange * 2.0;\n      fDensityIntegral = fDeltaY * fDeltaY * 0.5;\n    } else {\n      fDeltaY = 0.;\n      fDensityIntegral = 0.;\n    }\n  } else {\n    if (wPos.y < _FogTop) {\n      float fDeltaA = (_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      float fDeltaB = (_FogTop - wPos.y) / _FogRange * 2.;\n      fDeltaY = abs(fDeltaA - fDeltaB);\n      fDensityIntegral = abs((fDeltaA * fDeltaA * 0.5) - (fDeltaB * fDeltaB * 0.5));\n    } else {\n      fDeltaY = abs(_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      fDensityIntegral = abs(fDeltaY * fDeltaY * 0.5);\n    }\n  }\n  float fDensity;\n  if (fDeltaY != 0.) {\n    fDensity = (sqrt(1.0 + ((fDeltaD / fDeltaY) * (fDeltaD / fDeltaY)))) * fDensityIntegral;\n  } else {\n    fDensity = 0.;\n  }\n  float f = exp(-fDensity);\n  return f;\n}\nvoid CC_TRANSFER_FOG_BASE(vec4 pos, out float factor)\n{\n  #if CC_USE_FOG == 0\n\tfactor = LinearFog(pos);\n  #elif CC_USE_FOG == 1\n    factor = ExpFog(pos);\n  #elif CC_USE_FOG == 2\n    factor = ExpSquaredFog(pos);\n  #elif CC_USE_FOG == 3\n    factor = LayeredFog(pos);\n  #else\n    factor = 1.0;\n  #endif\n}\n#if !CC_USE_ACCURATE_FOG\nlayout(location = 0) out float v_fog_factor;\n#endif\nvoid CC_TRANSFER_FOG(vec4 pos) {\n#if !CC_USE_ACCURATE_FOG\n    CC_TRANSFER_FOG_BASE(pos, v_fog_factor);\n#endif\n}\n#if USE_VERTEX_COLOR\n  layout(location = 14) in lowp vec4 a_color;\n  layout(location = 1) out lowp vec4 v_color;\n#endif\n#if USE_TEXTURE\n  layout(location = 2) out vec2 v_uv;\n  layout(set = 1, binding = 0) uniform TexCoords {\n    vec4 tilingOffset;\n  };\n#endif\nvec4 vert () {\n  vec4 position;\n  CCVertInput(position);\n  mat4 matWorld;\n  CCGetWorldMatrix(matWorld);\n  #if USE_TEXTURE\n    v_uv = a_texCoord * tilingOffset.xy + tilingOffset.zw;\n    #if SAMPLE_FROM_RT\n      v_uv = cc_cameraPos.w > 1.0 ? vec2(v_uv.x, 1.0 - v_uv.y) : v_uv;\n    #endif\n  #endif\n  #if USE_VERTEX_COLOR\n    v_color = a_color;\n  #endif\n  CC_TRANSFER_FOG(matWorld * position);\n  return cc_matProj * (cc_matView * matWorld) * position;\n}\nvoid main() { gl_Position = vert(); }","frag":"\nprecision highp float;\nvec3 ACESToneMap (vec3 color) {\n  color = min(color, vec3(8.0));\n  const float A = 2.51;\n  const float B = 0.03;\n  const float C = 2.43;\n  const float D = 0.59;\n  const float E = 0.14;\n  return (color * (A * color + B)) / (color * (C * color + D) + E);\n}\nvec3 SRGBToLinear (vec3 gamma) {\n  return gamma * gamma;\n}\nvec4 CCFragOutput (vec4 color) {\n  #if CC_USE_HDR\n    color.rgb = ACESToneMap(color.rgb);\n  #endif\n  color.rgb = sqrt(color.rgb);\n  return color;\n}\nlayout(set = 0, binding = 0) uniform CCGlobal {\n  highp   vec4 cc_time;\n  mediump vec4 cc_screenSize;\n  mediump vec4 cc_nativeSize;\n};\nlayout(set = 0, binding = 1) uniform CCCamera {\n  highp   mat4 cc_matView;\n  highp   mat4 cc_matViewInv;\n  highp   mat4 cc_matProj;\n  highp   mat4 cc_matProjInv;\n  highp   mat4 cc_matViewProj;\n  highp   mat4 cc_matViewProjInv;\n  highp   vec4 cc_cameraPos;\n  mediump vec4 cc_screenScale;\n  mediump vec4 cc_exposure;\n  mediump vec4 cc_mainLitDir;\n  mediump vec4 cc_mainLitColor;\n  mediump vec4 cc_ambientSky;\n  mediump vec4 cc_ambientGround;\n  mediump vec4 cc_fogColor;\n  mediump vec4 cc_fogBase;\n  mediump vec4 cc_fogAdd;\n  mediump vec4 cc_nearFar;\n  mediump vec4 cc_viewPort;\n};\nfloat LinearFog(vec4 pos) {\n  vec4 wPos = pos;\n  float cam_dis = distance(cc_cameraPos, wPos);\n  float fogStart = cc_fogBase.x;\n  float fogEnd = cc_fogBase.y;\n  return clamp((fogEnd - cam_dis) / (fogEnd - fogStart), 0., 1.);\n}\nfloat ExpFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * fogDensity);\n  return f;\n}\nfloat ExpSquaredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * cam_dis * fogDensity * fogDensity);\n  return f;\n}\nfloat LayeredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float _FogTop = cc_fogAdd.x;\n  float _FogRange = cc_fogAdd.y;\n  vec3 camWorldProj = cc_cameraPos.xyz;\n  camWorldProj.y = 0.;\n  vec3 worldPosProj = wPos.xyz;\n  worldPosProj.y = 0.;\n  float fDeltaD = distance(worldPosProj, camWorldProj) / fogAtten * 2.0;\n  float fDeltaY, fDensityIntegral;\n  if (cc_cameraPos.y > _FogTop) {\n    if (wPos.y < _FogTop) {\n      fDeltaY = (_FogTop - wPos.y) / _FogRange * 2.0;\n      fDensityIntegral = fDeltaY * fDeltaY * 0.5;\n    } else {\n      fDeltaY = 0.;\n      fDensityIntegral = 0.;\n    }\n  } else {\n    if (wPos.y < _FogTop) {\n      float fDeltaA = (_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      float fDeltaB = (_FogTop - wPos.y) / _FogRange * 2.;\n      fDeltaY = abs(fDeltaA - fDeltaB);\n      fDensityIntegral = abs((fDeltaA * fDeltaA * 0.5) - (fDeltaB * fDeltaB * 0.5));\n    } else {\n      fDeltaY = abs(_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      fDensityIntegral = abs(fDeltaY * fDeltaY * 0.5);\n    }\n  }\n  float fDensity;\n  if (fDeltaY != 0.) {\n    fDensity = (sqrt(1.0 + ((fDeltaD / fDeltaY) * (fDeltaD / fDeltaY)))) * fDensityIntegral;\n  } else {\n    fDensity = 0.;\n  }\n  float f = exp(-fDensity);\n  return f;\n}\nvoid CC_TRANSFER_FOG_BASE(vec4 pos, out float factor)\n{\n  #if CC_USE_FOG == 0\n\tfactor = LinearFog(pos);\n  #elif CC_USE_FOG == 1\n    factor = ExpFog(pos);\n  #elif CC_USE_FOG == 2\n    factor = ExpSquaredFog(pos);\n  #elif CC_USE_FOG == 3\n    factor = LayeredFog(pos);\n  #else\n    factor = 1.0;\n  #endif\n}\nvoid CC_APPLY_FOG_BASE(inout vec4 color, float factor) {\n  color = vec4(mix(cc_fogColor.rgb, color.rgb, factor), color.a);\n}\n#if !CC_USE_ACCURATE_FOG\nlayout(location = 0) in float v_fog_factor;\n#endif\nvoid CC_APPLY_FOG(inout vec4 color) {\n#if !CC_USE_ACCURATE_FOG\n    CC_APPLY_FOG_BASE(color, v_fog_factor);\n#endif\n}\nvoid CC_APPLY_FOG(inout vec4 color, vec3 worldPos) {\n#if CC_USE_ACCURATE_FOG\n    float factor;\n    CC_TRANSFER_FOG_BASE(vec4(worldPos, 1.0), factor);\n#else\n    float factor = v_fog_factor;\n#endif\n    CC_APPLY_FOG_BASE(color, factor);\n}\n#if USE_ALPHA_TEST\n#endif\n#if USE_TEXTURE\n  layout(location = 2) in vec2 v_uv;\n  layout(set = 1, binding = 2) uniform sampler2D mainTexture;\n#endif\nlayout(set = 1, binding = 1) uniform Constant {\n  vec4 mainColor;\n  vec4 colorScaleAndCutoff;\n};\n#if USE_VERTEX_COLOR\n  layout(location = 1) in lowp vec4 v_color;\n#endif\nvec4 frag () {\n  vec4 o = mainColor;\n  o.rgb *= colorScaleAndCutoff.xyz;\n  #if USE_VERTEX_COLOR\n    o.rgb *= SRGBToLinear(v_color.rgb);\n    o.a *= v_color.a;\n  #endif\n  #if USE_TEXTURE\n    vec4 texColor = texture(mainTexture, v_uv);\n    texColor.rgb = SRGBToLinear(texColor.rgb);\n    o *= texColor;\n  #endif\n  #if USE_ALPHA_TEST\n    if (o.ALPHA_TEST_CHANNEL < colorScaleAndCutoff.w) discard;\n  #endif\n  CC_APPLY_FOG(o);\n  return CCFragOutput(o);\n}\nlayout(location = 0) out vec4 cc_FragColor;\nvoid main() { cc_FragColor = frag(); }"},"glsl3":{"vert":"\nprecision highp float;\n#define QUATER_PI         0.78539816340\n#define HALF_PI           1.57079632679\n#define PI                3.14159265359\n#define PI2               6.28318530718\n#define PI4               12.5663706144\n#define INV_QUATER_PI     1.27323954474\n#define INV_HALF_PI       0.63661977237\n#define INV_PI            0.31830988618\n#define INV_PI2           0.15915494309\n#define INV_PI4           0.07957747155\n#define EPSILON           1e-6\n#define EPSILON_LOWP      1e-4\n#define LOG2              1.442695\n#define EXP_VALUE         2.71828183f\n#define FP_MAX            65504.0\n#define FP_SCALE          0.0009765625\n#define FP_SCALE_INV      1024.0\n#define GRAY_VECTOR       vec3(0.299, 0.587, 0.114)\nhighp float decode32 (highp vec4 rgba) {\n  rgba = rgba * 255.0;\n  highp float Sign = 1.0 - (step(128.0, (rgba[3]) + 0.5)) * 2.0;\n  highp float Exponent = 2.0 * (mod(float(int((rgba[3]) + 0.5)), 128.0)) + (step(128.0, (rgba[2]) + 0.5)) - 127.0;\n  highp float Mantissa = (mod(float(int((rgba[2]) + 0.5)), 128.0)) * 65536.0 + rgba[1] * 256.0 + rgba[0] + 8388608.0;\n  return Sign * exp2(Exponent - 23.0) * Mantissa;\n}\nstruct StandardVertInput {\n  highp vec4 position;\n  vec3 normal;\n  vec4 tangent;\n};\nin vec3 a_position;\nin vec3 a_normal;\nin vec2 a_texCoord;\nin vec4 a_tangent;\n#if CC_USE_SKINNING\n    in vec4 a_joints;\n  in vec4 a_weights;\n#endif\n#if USE_INSTANCING\n  #if CC_USE_BAKED_ANIMATION\n    in highp vec4 a_jointAnimInfo;\n  #endif\n  in vec4 a_matWorld0;\n  in vec4 a_matWorld1;\n  in vec4 a_matWorld2;\n  #if CC_USE_LIGHTMAP\n    in vec4 a_lightingMapUVParam;\n  #endif\n  #if CC_RECEIVE_SHADOW\n    in vec2 a_localShadowBias;\n  #endif\n#elif USE_BATCHING\n  in float a_dyn_batch_id;\n#endif\n#if CC_USE_MORPH\n    in float a_vertexId;\n    int getVertexId() {\n      return int(a_vertexId);\n    }\n#endif\n#if CC_USE_MORPH\n  layout(std140) uniform CCMorph {\n    vec4 cc_displacementWeights[15];\n    vec4 cc_displacementTextureInfo;\n  };\n  vec2 getPixelLocation(vec2 textureResolution, int pixelIndex) {\n    float pixelIndexF = float(pixelIndex);\n    float x = mod(pixelIndexF, textureResolution.x);\n    float y = floor(pixelIndexF / textureResolution.x);\n    return vec2(x, y);\n  }\n  vec2 getPixelCoordFromLocation(vec2 location, vec2 textureResolution) {\n    return (vec2(location.x, location.y) + .5) / textureResolution;\n  }\n  #if CC_DEVICE_SUPPORT_FLOAT_TEXTURE\n      vec4 fetchVec3ArrayFromTexture(sampler2D tex, int pixelIndex) {\n        ivec2 texSize = textureSize(tex, 0);\n        return texelFetch(tex, ivec2(pixelIndex % texSize.x, pixelIndex / texSize.x), 0);\n      }\n  #else\n    vec4 fetchVec3ArrayFromTexture(sampler2D tex, int elementIndex) {\n      int pixelIndex = elementIndex * 4;\n      vec2 location = getPixelLocation(cc_displacementTextureInfo.xy, pixelIndex);\n      vec2 x = getPixelCoordFromLocation(location + vec2(0.0, 0.0), cc_displacementTextureInfo.xy);\n      vec2 y = getPixelCoordFromLocation(location + vec2(1.0, 0.0), cc_displacementTextureInfo.xy);\n      vec2 z = getPixelCoordFromLocation(location + vec2(2.0, 0.0), cc_displacementTextureInfo.xy);\n      return vec4(\n        decode32(texture(tex, x)),\n        decode32(texture(tex, y)),\n        decode32(texture(tex, z)),\n        1.0\n      );\n    }\n  #endif\n  float getDisplacementWeight(int index) {\n    int quot = index / 4;\n    int remainder = index - quot * 4;\n    if (remainder == 0) {\n      return cc_displacementWeights[quot].x;\n    } else if (remainder == 1) {\n      return cc_displacementWeights[quot].y;\n    } else if (remainder == 2) {\n      return cc_displacementWeights[quot].z;\n    } else {\n      return cc_displacementWeights[quot].w;\n    }\n  }\n  vec3 getVec3DisplacementFromTexture(sampler2D tex, int vertexIndex) {\n  #if CC_MORPH_PRECOMPUTED\n    return fetchVec3ArrayFromTexture(tex, vertexIndex).rgb;\n  #else\n    vec3 result = vec3(0, 0, 0);\n    int nVertices = int(cc_displacementTextureInfo.z);\n    for (int iTarget = 0; iTarget < CC_MORPH_TARGET_COUNT; ++iTarget) {\n      result += (fetchVec3ArrayFromTexture(tex, nVertices * iTarget + vertexIndex).rgb * getDisplacementWeight(iTarget));\n    }\n    return result;\n  #endif\n  }\n  #if CC_MORPH_TARGET_HAS_POSITION\n    uniform sampler2D cc_PositionDisplacements;\n    vec3 getPositionDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_PositionDisplacements, vertexId);\n    }\n  #endif\n  #if CC_MORPH_TARGET_HAS_NORMAL\n    uniform sampler2D cc_NormalDisplacements;\n    vec3 getNormalDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_NormalDisplacements, vertexId);\n    }\n  #endif\n  #if CC_MORPH_TARGET_HAS_TANGENT\n    uniform sampler2D cc_TangentDisplacements;\n    vec3 getTangentDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_TangentDisplacements, vertexId);\n    }\n  #endif\n  void applyMorph (inout vec4 position, inout vec3 normal, inout vec4 tangent) {\n    int vertexId = getVertexId();\n  #if CC_MORPH_TARGET_HAS_POSITION\n    position.xyz = position.xyz + getPositionDisplacement(vertexId);\n  #endif\n  #if CC_MORPH_TARGET_HAS_NORMAL\n    normal.xyz = normal.xyz + getNormalDisplacement(vertexId);\n  #endif\n  #if CC_MORPH_TARGET_HAS_TANGENT\n    tangent.xyz = tangent.xyz + getTangentDisplacement(vertexId);\n  #endif\n  }\n  void applyMorph (inout vec4 position) {\n  #if CC_MORPH_TARGET_HAS_POSITION\n    position.xyz = position.xyz + getPositionDisplacement(getVertexId());\n  #endif\n  }\n#endif\n#if CC_USE_SKINNING\n  #if CC_USE_BAKED_ANIMATION\n    layout(std140) uniform CCSkinningTexture {\n      highp vec4 cc_jointTextureInfo;\n    };\n    layout(std140) uniform CCSkinningAnimation {\n      highp vec4 cc_jointAnimInfo;\n    };\n    uniform highp sampler2D cc_jointTexture;\n    void CCGetJointTextureCoords(float pixelsPerJoint, float jointIdx, out highp float x, out highp float y, out highp float invSize)\n    {\n      #if USE_INSTANCING\n        highp float temp = pixelsPerJoint * (a_jointAnimInfo.x * a_jointAnimInfo.y + jointIdx) + a_jointAnimInfo.z;\n      #else\n        highp float temp = pixelsPerJoint * (cc_jointAnimInfo.x * cc_jointTextureInfo.y + jointIdx) + cc_jointTextureInfo.z;\n      #endif\n      invSize = cc_jointTextureInfo.w;\n      highp float tempY = floor(temp * invSize);\n      x = floor(temp - tempY * cc_jointTextureInfo.x);\n      y = (tempY + 0.5) * invSize;\n    }\n  #else\n    layout(std140) uniform CCSkinning {\n      highp vec4 cc_joints[30 * 3];\n    };\n  #endif\n  #if CC_USE_BAKED_ANIMATION\n    #if CC_DEVICE_SUPPORT_FLOAT_TEXTURE\n      mat4 getJointMatrix (float i) {\n        highp float x, y, invSize;\n        CCGetJointTextureCoords(3.0, i, x, y, invSize);\n        vec4 v1 = texture(cc_jointTexture, vec2((x + 0.5) * invSize, y));\n        vec4 v2 = texture(cc_jointTexture, vec2((x + 1.5) * invSize, y));\n        vec4 v3 = texture(cc_jointTexture, vec2((x + 2.5) * invSize, y));\n        return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n      }\n    #else\n      mat4 getJointMatrix (float i) {\n        highp float x, y, invSize;\n        CCGetJointTextureCoords(12.0, i, x, y, invSize);\n        vec4 v1 = vec4(\n          decode32(texture(cc_jointTexture, vec2((x + 0.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 1.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 2.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 3.5) * invSize, y)))\n        );\n        vec4 v2 = vec4(\n          decode32(texture(cc_jointTexture, vec2((x + 4.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 5.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 6.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 7.5) * invSize, y)))\n        );\n        vec4 v3 = vec4(\n          decode32(texture(cc_jointTexture, vec2((x + 8.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 9.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 10.5) * invSize, y))),\n          decode32(texture(cc_jointTexture, vec2((x + 11.5) * invSize, y)))\n        );\n        return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n      }\n    #endif\n  #else\n    mat4 getJointMatrix (float i) {\n      int idx = int(i);\n      vec4 v1 = cc_joints[idx * 3];\n      vec4 v2 = cc_joints[idx * 3 + 1];\n      vec4 v3 = cc_joints[idx * 3 + 2];\n      return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n    }\n  #endif\n  mat4 skinMatrix () {\n    vec4 joints = vec4(a_joints);\n    return getJointMatrix(joints.x) * a_weights.x\n         + getJointMatrix(joints.y) * a_weights.y\n         + getJointMatrix(joints.z) * a_weights.z\n         + getJointMatrix(joints.w) * a_weights.w;\n  }\n  void CCSkin (inout vec4 position) {\n    mat4 m = skinMatrix();\n    position = m * position;\n  }\n  void CCSkin (inout vec4 position, inout vec3 normal, inout vec4 tangent) {\n    mat4 m = skinMatrix();\n    position = m * position;\n    normal = (m * vec4(normal, 0.0)).xyz;\n    tangent.xyz = (m * vec4(tangent.xyz, 0.0)).xyz;\n  }\n#endif\nvoid CCVertInput(inout vec4 In)\n{\n    In = vec4(a_position, 1.0);\n  #if CC_USE_MORPH\n    applyMorph(In);\n  #endif\n  #if CC_USE_SKINNING\n    CCSkin(In);\n  #endif\n}\nlayout(std140) uniform CCGlobal {\n  highp   vec4 cc_time;\n  mediump vec4 cc_screenSize;\n  mediump vec4 cc_nativeSize;\n};\nlayout(std140) uniform CCCamera {\n  highp   mat4 cc_matView;\n  highp   mat4 cc_matViewInv;\n  highp   mat4 cc_matProj;\n  highp   mat4 cc_matProjInv;\n  highp   mat4 cc_matViewProj;\n  highp   mat4 cc_matViewProjInv;\n  highp   vec4 cc_cameraPos;\n  mediump vec4 cc_screenScale;\n  mediump vec4 cc_exposure;\n  mediump vec4 cc_mainLitDir;\n  mediump vec4 cc_mainLitColor;\n  mediump vec4 cc_ambientSky;\n  mediump vec4 cc_ambientGround;\n  mediump vec4 cc_fogColor;\n  mediump vec4 cc_fogBase;\n  mediump vec4 cc_fogAdd;\n  mediump vec4 cc_nearFar;\n  mediump vec4 cc_viewPort;\n};\n#if !USE_INSTANCING\n  #if USE_BATCHING\n    layout(std140) uniform CCLocalBatched {\n      highp mat4 cc_matWorlds[10];\n    };\n  #else\n    layout(std140) uniform CCLocal {\n      highp mat4 cc_matWorld;\n      highp mat4 cc_matWorldIT;\n      highp vec4 cc_lightingMapUVParam;\n      highp vec4 cc_localShadowBias;\n    };\n  #endif\n#endif\nvoid CCGetWorldMatrix(out mat4 matWorld)\n{\n  #if USE_INSTANCING\n    matWorld = mat4(\n      vec4(a_matWorld0.xyz, 0.0),\n      vec4(a_matWorld1.xyz, 0.0),\n      vec4(a_matWorld2.xyz, 0.0),\n      vec4(a_matWorld0.w, a_matWorld1.w, a_matWorld2.w, 1.0)\n    );\n  #elif USE_BATCHING\n    matWorld = cc_matWorlds[int(a_dyn_batch_id)];\n  #else\n    matWorld = cc_matWorld;\n  #endif\n}\nfloat LinearFog(vec4 pos) {\n  vec4 wPos = pos;\n  float cam_dis = distance(cc_cameraPos, wPos);\n  float fogStart = cc_fogBase.x;\n  float fogEnd = cc_fogBase.y;\n  return clamp((fogEnd - cam_dis) / (fogEnd - fogStart), 0., 1.);\n}\nfloat ExpFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * fogDensity);\n  return f;\n}\nfloat ExpSquaredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * cam_dis * fogDensity * fogDensity);\n  return f;\n}\nfloat LayeredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float _FogTop = cc_fogAdd.x;\n  float _FogRange = cc_fogAdd.y;\n  vec3 camWorldProj = cc_cameraPos.xyz;\n  camWorldProj.y = 0.;\n  vec3 worldPosProj = wPos.xyz;\n  worldPosProj.y = 0.;\n  float fDeltaD = distance(worldPosProj, camWorldProj) / fogAtten * 2.0;\n  float fDeltaY, fDensityIntegral;\n  if (cc_cameraPos.y > _FogTop) {\n    if (wPos.y < _FogTop) {\n      fDeltaY = (_FogTop - wPos.y) / _FogRange * 2.0;\n      fDensityIntegral = fDeltaY * fDeltaY * 0.5;\n    } else {\n      fDeltaY = 0.;\n      fDensityIntegral = 0.;\n    }\n  } else {\n    if (wPos.y < _FogTop) {\n      float fDeltaA = (_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      float fDeltaB = (_FogTop - wPos.y) / _FogRange * 2.;\n      fDeltaY = abs(fDeltaA - fDeltaB);\n      fDensityIntegral = abs((fDeltaA * fDeltaA * 0.5) - (fDeltaB * fDeltaB * 0.5));\n    } else {\n      fDeltaY = abs(_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      fDensityIntegral = abs(fDeltaY * fDeltaY * 0.5);\n    }\n  }\n  float fDensity;\n  if (fDeltaY != 0.) {\n    fDensity = (sqrt(1.0 + ((fDeltaD / fDeltaY) * (fDeltaD / fDeltaY)))) * fDensityIntegral;\n  } else {\n    fDensity = 0.;\n  }\n  float f = exp(-fDensity);\n  return f;\n}\nvoid CC_TRANSFER_FOG_BASE(vec4 pos, out float factor)\n{\n  #if CC_USE_FOG == 0\n\tfactor = LinearFog(pos);\n  #elif CC_USE_FOG == 1\n    factor = ExpFog(pos);\n  #elif CC_USE_FOG == 2\n    factor = ExpSquaredFog(pos);\n  #elif CC_USE_FOG == 3\n    factor = LayeredFog(pos);\n  #else\n    factor = 1.0;\n  #endif\n}\n#if !CC_USE_ACCURATE_FOG\nout float v_fog_factor;\n#endif\nvoid CC_TRANSFER_FOG(vec4 pos) {\n#if !CC_USE_ACCURATE_FOG\n    CC_TRANSFER_FOG_BASE(pos, v_fog_factor);\n#endif\n}\n#if USE_VERTEX_COLOR\n  in lowp vec4 a_color;\n  out lowp vec4 v_color;\n#endif\n#if USE_TEXTURE\n  out vec2 v_uv;\n  layout(std140) uniform TexCoords {\n    vec4 tilingOffset;\n  };\n#endif\nvec4 vert () {\n  vec4 position;\n  CCVertInput(position);\n  mat4 matWorld;\n  CCGetWorldMatrix(matWorld);\n  #if USE_TEXTURE\n    v_uv = a_texCoord * tilingOffset.xy + tilingOffset.zw;\n    #if SAMPLE_FROM_RT\n      v_uv = cc_cameraPos.w > 1.0 ? vec2(v_uv.x, 1.0 - v_uv.y) : v_uv;\n    #endif\n  #endif\n  #if USE_VERTEX_COLOR\n    v_color = a_color;\n  #endif\n  CC_TRANSFER_FOG(matWorld * position);\n  return cc_matProj * (cc_matView * matWorld) * position;\n}\nvoid main() { gl_Position = vert(); }","frag":"\nprecision highp float;\nvec3 ACESToneMap (vec3 color) {\n  color = min(color, vec3(8.0));\n  const float A = 2.51;\n  const float B = 0.03;\n  const float C = 2.43;\n  const float D = 0.59;\n  const float E = 0.14;\n  return (color * (A * color + B)) / (color * (C * color + D) + E);\n}\nvec3 SRGBToLinear (vec3 gamma) {\n  return gamma * gamma;\n}\nvec4 CCFragOutput (vec4 color) {\n  #if CC_USE_HDR\n    color.rgb = ACESToneMap(color.rgb);\n  #endif\n  color.rgb = sqrt(color.rgb);\n  return color;\n}\nlayout(std140) uniform CCGlobal {\n  highp   vec4 cc_time;\n  mediump vec4 cc_screenSize;\n  mediump vec4 cc_nativeSize;\n};\nlayout(std140) uniform CCCamera {\n  highp   mat4 cc_matView;\n  highp   mat4 cc_matViewInv;\n  highp   mat4 cc_matProj;\n  highp   mat4 cc_matProjInv;\n  highp   mat4 cc_matViewProj;\n  highp   mat4 cc_matViewProjInv;\n  highp   vec4 cc_cameraPos;\n  mediump vec4 cc_screenScale;\n  mediump vec4 cc_exposure;\n  mediump vec4 cc_mainLitDir;\n  mediump vec4 cc_mainLitColor;\n  mediump vec4 cc_ambientSky;\n  mediump vec4 cc_ambientGround;\n  mediump vec4 cc_fogColor;\n  mediump vec4 cc_fogBase;\n  mediump vec4 cc_fogAdd;\n  mediump vec4 cc_nearFar;\n  mediump vec4 cc_viewPort;\n};\nfloat LinearFog(vec4 pos) {\n  vec4 wPos = pos;\n  float cam_dis = distance(cc_cameraPos, wPos);\n  float fogStart = cc_fogBase.x;\n  float fogEnd = cc_fogBase.y;\n  return clamp((fogEnd - cam_dis) / (fogEnd - fogStart), 0., 1.);\n}\nfloat ExpFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * fogDensity);\n  return f;\n}\nfloat ExpSquaredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * cam_dis * fogDensity * fogDensity);\n  return f;\n}\nfloat LayeredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float _FogTop = cc_fogAdd.x;\n  float _FogRange = cc_fogAdd.y;\n  vec3 camWorldProj = cc_cameraPos.xyz;\n  camWorldProj.y = 0.;\n  vec3 worldPosProj = wPos.xyz;\n  worldPosProj.y = 0.;\n  float fDeltaD = distance(worldPosProj, camWorldProj) / fogAtten * 2.0;\n  float fDeltaY, fDensityIntegral;\n  if (cc_cameraPos.y > _FogTop) {\n    if (wPos.y < _FogTop) {\n      fDeltaY = (_FogTop - wPos.y) / _FogRange * 2.0;\n      fDensityIntegral = fDeltaY * fDeltaY * 0.5;\n    } else {\n      fDeltaY = 0.;\n      fDensityIntegral = 0.;\n    }\n  } else {\n    if (wPos.y < _FogTop) {\n      float fDeltaA = (_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      float fDeltaB = (_FogTop - wPos.y) / _FogRange * 2.;\n      fDeltaY = abs(fDeltaA - fDeltaB);\n      fDensityIntegral = abs((fDeltaA * fDeltaA * 0.5) - (fDeltaB * fDeltaB * 0.5));\n    } else {\n      fDeltaY = abs(_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      fDensityIntegral = abs(fDeltaY * fDeltaY * 0.5);\n    }\n  }\n  float fDensity;\n  if (fDeltaY != 0.) {\n    fDensity = (sqrt(1.0 + ((fDeltaD / fDeltaY) * (fDeltaD / fDeltaY)))) * fDensityIntegral;\n  } else {\n    fDensity = 0.;\n  }\n  float f = exp(-fDensity);\n  return f;\n}\nvoid CC_TRANSFER_FOG_BASE(vec4 pos, out float factor)\n{\n  #if CC_USE_FOG == 0\n\tfactor = LinearFog(pos);\n  #elif CC_USE_FOG == 1\n    factor = ExpFog(pos);\n  #elif CC_USE_FOG == 2\n    factor = ExpSquaredFog(pos);\n  #elif CC_USE_FOG == 3\n    factor = LayeredFog(pos);\n  #else\n    factor = 1.0;\n  #endif\n}\nvoid CC_APPLY_FOG_BASE(inout vec4 color, float factor) {\n  color = vec4(mix(cc_fogColor.rgb, color.rgb, factor), color.a);\n}\n#if !CC_USE_ACCURATE_FOG\nin float v_fog_factor;\n#endif\nvoid CC_APPLY_FOG(inout vec4 color) {\n#if !CC_USE_ACCURATE_FOG\n    CC_APPLY_FOG_BASE(color, v_fog_factor);\n#endif\n}\nvoid CC_APPLY_FOG(inout vec4 color, vec3 worldPos) {\n#if CC_USE_ACCURATE_FOG\n    float factor;\n    CC_TRANSFER_FOG_BASE(vec4(worldPos, 1.0), factor);\n#else\n    float factor = v_fog_factor;\n#endif\n    CC_APPLY_FOG_BASE(color, factor);\n}\n#if USE_ALPHA_TEST\n#endif\n#if USE_TEXTURE\n  in vec2 v_uv;\n  uniform sampler2D mainTexture;\n#endif\nlayout(std140) uniform Constant {\n  vec4 mainColor;\n  vec4 colorScaleAndCutoff;\n};\n#if USE_VERTEX_COLOR\n  in lowp vec4 v_color;\n#endif\nvec4 frag () {\n  vec4 o = mainColor;\n  o.rgb *= colorScaleAndCutoff.xyz;\n  #if USE_VERTEX_COLOR\n    o.rgb *= SRGBToLinear(v_color.rgb);\n    o.a *= v_color.a;\n  #endif\n  #if USE_TEXTURE\n    vec4 texColor = texture(mainTexture, v_uv);\n    texColor.rgb = SRGBToLinear(texColor.rgb);\n    o *= texColor;\n  #endif\n  #if USE_ALPHA_TEST\n    if (o.ALPHA_TEST_CHANNEL < colorScaleAndCutoff.w) discard;\n  #endif\n  CC_APPLY_FOG(o);\n  return CCFragOutput(o);\n}\nlayout(location = 0) out vec4 cc_FragColor;\nvoid main() { cc_FragColor = frag(); }"},"glsl1":{"vert":"\nprecision highp float;\n#define QUATER_PI         0.78539816340\n#define HALF_PI           1.57079632679\n#define PI                3.14159265359\n#define PI2               6.28318530718\n#define PI4               12.5663706144\n#define INV_QUATER_PI     1.27323954474\n#define INV_HALF_PI       0.63661977237\n#define INV_PI            0.31830988618\n#define INV_PI2           0.15915494309\n#define INV_PI4           0.07957747155\n#define EPSILON           1e-6\n#define EPSILON_LOWP      1e-4\n#define LOG2              1.442695\n#define EXP_VALUE         2.71828183f\n#define FP_MAX            65504.0\n#define FP_SCALE          0.0009765625\n#define FP_SCALE_INV      1024.0\n#define GRAY_VECTOR       vec3(0.299, 0.587, 0.114)\nhighp float decode32 (highp vec4 rgba) {\n  rgba = rgba * 255.0;\n  highp float Sign = 1.0 - (step(128.0, (rgba[3]) + 0.5)) * 2.0;\n  highp float Exponent = 2.0 * (mod(float(int((rgba[3]) + 0.5)), 128.0)) + (step(128.0, (rgba[2]) + 0.5)) - 127.0;\n  highp float Mantissa = (mod(float(int((rgba[2]) + 0.5)), 128.0)) * 65536.0 + rgba[1] * 256.0 + rgba[0] + 8388608.0;\n  return Sign * exp2(Exponent - 23.0) * Mantissa;\n}\nstruct StandardVertInput {\n  highp vec4 position;\n  vec3 normal;\n  vec4 tangent;\n};\nattribute vec3 a_position;\nattribute vec3 a_normal;\nattribute vec2 a_texCoord;\nattribute vec4 a_tangent;\n#if CC_USE_SKINNING\n    attribute vec4 a_joints;\n  attribute vec4 a_weights;\n#endif\n#if USE_INSTANCING\n  #if CC_USE_BAKED_ANIMATION\n    attribute highp vec4 a_jointAnimInfo;\n  #endif\n  attribute vec4 a_matWorld0;\n  attribute vec4 a_matWorld1;\n  attribute vec4 a_matWorld2;\n  #if CC_USE_LIGHTMAP\n    attribute vec4 a_lightingMapUVParam;\n  #endif\n  #if CC_RECEIVE_SHADOW\n    attribute vec2 a_localShadowBias;\n  #endif\n#elif USE_BATCHING\n  attribute float a_dyn_batch_id;\n#endif\n#if CC_USE_MORPH\n    attribute float a_vertexId;\n    int getVertexId() {\n      return int(a_vertexId);\n    }\n#endif\n#if CC_USE_MORPH\n  uniform vec4 cc_displacementWeights[15];\n  uniform vec4 cc_displacementTextureInfo;\n  vec2 getPixelLocation(vec2 textureResolution, int pixelIndex) {\n    float pixelIndexF = float(pixelIndex);\n    float x = mod(pixelIndexF, textureResolution.x);\n    float y = floor(pixelIndexF / textureResolution.x);\n    return vec2(x, y);\n  }\n  vec2 getPixelCoordFromLocation(vec2 location, vec2 textureResolution) {\n    return (vec2(location.x, location.y) + .5) / textureResolution;\n  }\n  #if CC_DEVICE_SUPPORT_FLOAT_TEXTURE\n      vec4 fetchVec3ArrayFromTexture(sampler2D tex, int elementIndex) {\n        int pixelIndex = elementIndex;\n        vec2 location = getPixelLocation(cc_displacementTextureInfo.xy, pixelIndex);\n        vec2 uv = getPixelCoordFromLocation(location, cc_displacementTextureInfo.xy);\n        return texture2D(tex, uv);\n      }\n  #else\n    vec4 fetchVec3ArrayFromTexture(sampler2D tex, int elementIndex) {\n      int pixelIndex = elementIndex * 4;\n      vec2 location = getPixelLocation(cc_displacementTextureInfo.xy, pixelIndex);\n      vec2 x = getPixelCoordFromLocation(location + vec2(0.0, 0.0), cc_displacementTextureInfo.xy);\n      vec2 y = getPixelCoordFromLocation(location + vec2(1.0, 0.0), cc_displacementTextureInfo.xy);\n      vec2 z = getPixelCoordFromLocation(location + vec2(2.0, 0.0), cc_displacementTextureInfo.xy);\n      return vec4(\n        decode32(texture2D(tex, x)),\n        decode32(texture2D(tex, y)),\n        decode32(texture2D(tex, z)),\n        1.0\n      );\n    }\n  #endif\n  float getDisplacementWeight(int index) {\n    int quot = index / 4;\n    int remainder = index - quot * 4;\n    if (remainder == 0) {\n      return cc_displacementWeights[quot].x;\n    } else if (remainder == 1) {\n      return cc_displacementWeights[quot].y;\n    } else if (remainder == 2) {\n      return cc_displacementWeights[quot].z;\n    } else {\n      return cc_displacementWeights[quot].w;\n    }\n  }\n  vec3 getVec3DisplacementFromTexture(sampler2D tex, int vertexIndex) {\n  #if CC_MORPH_PRECOMPUTED\n    return fetchVec3ArrayFromTexture(tex, vertexIndex).rgb;\n  #else\n    vec3 result = vec3(0, 0, 0);\n    int nVertices = int(cc_displacementTextureInfo.z);\n    for (int iTarget = 0; iTarget < CC_MORPH_TARGET_COUNT; ++iTarget) {\n      result += (fetchVec3ArrayFromTexture(tex, nVertices * iTarget + vertexIndex).rgb * getDisplacementWeight(iTarget));\n    }\n    return result;\n  #endif\n  }\n  #if CC_MORPH_TARGET_HAS_POSITION\n    uniform sampler2D cc_PositionDisplacements;\n    vec3 getPositionDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_PositionDisplacements, vertexId);\n    }\n  #endif\n  #if CC_MORPH_TARGET_HAS_NORMAL\n    uniform sampler2D cc_NormalDisplacements;\n    vec3 getNormalDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_NormalDisplacements, vertexId);\n    }\n  #endif\n  #if CC_MORPH_TARGET_HAS_TANGENT\n    uniform sampler2D cc_TangentDisplacements;\n    vec3 getTangentDisplacement(int vertexId) {\n      return getVec3DisplacementFromTexture(cc_TangentDisplacements, vertexId);\n    }\n  #endif\n  void applyMorph (inout vec4 position, inout vec3 normal, inout vec4 tangent) {\n    int vertexId = getVertexId();\n  #if CC_MORPH_TARGET_HAS_POSITION\n    position.xyz = position.xyz + getPositionDisplacement(vertexId);\n  #endif\n  #if CC_MORPH_TARGET_HAS_NORMAL\n    normal.xyz = normal.xyz + getNormalDisplacement(vertexId);\n  #endif\n  #if CC_MORPH_TARGET_HAS_TANGENT\n    tangent.xyz = tangent.xyz + getTangentDisplacement(vertexId);\n  #endif\n  }\n  void applyMorph (inout vec4 position) {\n  #if CC_MORPH_TARGET_HAS_POSITION\n    position.xyz = position.xyz + getPositionDisplacement(getVertexId());\n  #endif\n  }\n#endif\n#if CC_USE_SKINNING\n  #if CC_USE_BAKED_ANIMATION\n    uniform highp vec4 cc_jointTextureInfo;\n    uniform highp vec4 cc_jointAnimInfo;\n    uniform highp sampler2D cc_jointTexture;\n    void CCGetJointTextureCoords(float pixelsPerJoint, float jointIdx, out highp float x, out highp float y, out highp float invSize)\n    {\n      #if USE_INSTANCING\n        highp float temp = pixelsPerJoint * (a_jointAnimInfo.x * a_jointAnimInfo.y + jointIdx) + a_jointAnimInfo.z;\n      #else\n        highp float temp = pixelsPerJoint * (cc_jointAnimInfo.x * cc_jointTextureInfo.y + jointIdx) + cc_jointTextureInfo.z;\n      #endif\n      invSize = cc_jointTextureInfo.w;\n      highp float tempY = floor(temp * invSize);\n      x = floor(temp - tempY * cc_jointTextureInfo.x);\n      y = (tempY + 0.5) * invSize;\n    }\n  #else\n    uniform highp vec4 cc_joints[90];\n  #endif\n  #if CC_USE_BAKED_ANIMATION\n    #if CC_DEVICE_SUPPORT_FLOAT_TEXTURE\n      mat4 getJointMatrix (float i) {\n        highp float x, y, invSize;\n        CCGetJointTextureCoords(3.0, i, x, y, invSize);\n        vec4 v1 = texture2D(cc_jointTexture, vec2((x + 0.5) * invSize, y));\n        vec4 v2 = texture2D(cc_jointTexture, vec2((x + 1.5) * invSize, y));\n        vec4 v3 = texture2D(cc_jointTexture, vec2((x + 2.5) * invSize, y));\n        return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n      }\n    #else\n      mat4 getJointMatrix (float i) {\n        highp float x, y, invSize;\n        CCGetJointTextureCoords(12.0, i, x, y, invSize);\n        vec4 v1 = vec4(\n          decode32(texture2D(cc_jointTexture, vec2((x + 0.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 1.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 2.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 3.5) * invSize, y)))\n        );\n        vec4 v2 = vec4(\n          decode32(texture2D(cc_jointTexture, vec2((x + 4.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 5.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 6.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 7.5) * invSize, y)))\n        );\n        vec4 v3 = vec4(\n          decode32(texture2D(cc_jointTexture, vec2((x + 8.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 9.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 10.5) * invSize, y))),\n          decode32(texture2D(cc_jointTexture, vec2((x + 11.5) * invSize, y)))\n        );\n        return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n      }\n    #endif\n  #else\n    mat4 getJointMatrix (float i) {\n      int idx = int(i);\n      vec4 v1 = cc_joints[idx * 3];\n      vec4 v2 = cc_joints[idx * 3 + 1];\n      vec4 v3 = cc_joints[idx * 3 + 2];\n      return mat4(vec4(v1.xyz, 0.0), vec4(v2.xyz, 0.0), vec4(v3.xyz, 0.0), vec4(v1.w, v2.w, v3.w, 1.0));\n    }\n  #endif\n  mat4 skinMatrix () {\n    vec4 joints = vec4(a_joints);\n    return getJointMatrix(joints.x) * a_weights.x\n         + getJointMatrix(joints.y) * a_weights.y\n         + getJointMatrix(joints.z) * a_weights.z\n         + getJointMatrix(joints.w) * a_weights.w;\n  }\n  void CCSkin (inout vec4 position) {\n    mat4 m = skinMatrix();\n    position = m * position;\n  }\n  void CCSkin (inout vec4 position, inout vec3 normal, inout vec4 tangent) {\n    mat4 m = skinMatrix();\n    position = m * position;\n    normal = (m * vec4(normal, 0.0)).xyz;\n    tangent.xyz = (m * vec4(tangent.xyz, 0.0)).xyz;\n  }\n#endif\nvoid CCVertInput(inout vec4 In)\n{\n    In = vec4(a_position, 1.0);\n  #if CC_USE_MORPH\n    applyMorph(In);\n  #endif\n  #if CC_USE_SKINNING\n    CCSkin(In);\n  #endif\n}\nuniform highp mat4 cc_matView;\n  uniform highp mat4 cc_matProj;\n  uniform highp vec4 cc_cameraPos;\n  uniform mediump vec4 cc_fogBase;\n  uniform mediump vec4 cc_fogAdd;\n#if !USE_INSTANCING\n  #if USE_BATCHING\n    uniform highp mat4 cc_matWorlds[10];\n  #else\n    uniform highp mat4 cc_matWorld;\n  #endif\n#endif\nvoid CCGetWorldMatrix(out mat4 matWorld)\n{\n  #if USE_INSTANCING\n    matWorld = mat4(\n      vec4(a_matWorld0.xyz, 0.0),\n      vec4(a_matWorld1.xyz, 0.0),\n      vec4(a_matWorld2.xyz, 0.0),\n      vec4(a_matWorld0.w, a_matWorld1.w, a_matWorld2.w, 1.0)\n    );\n  #elif USE_BATCHING\n    matWorld = cc_matWorlds[int(a_dyn_batch_id)];\n  #else\n    matWorld = cc_matWorld;\n  #endif\n}\nfloat LinearFog(vec4 pos) {\n  vec4 wPos = pos;\n  float cam_dis = distance(cc_cameraPos, wPos);\n  float fogStart = cc_fogBase.x;\n  float fogEnd = cc_fogBase.y;\n  return clamp((fogEnd - cam_dis) / (fogEnd - fogStart), 0., 1.);\n}\nfloat ExpFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * fogDensity);\n  return f;\n}\nfloat ExpSquaredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * cam_dis * fogDensity * fogDensity);\n  return f;\n}\nfloat LayeredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float _FogTop = cc_fogAdd.x;\n  float _FogRange = cc_fogAdd.y;\n  vec3 camWorldProj = cc_cameraPos.xyz;\n  camWorldProj.y = 0.;\n  vec3 worldPosProj = wPos.xyz;\n  worldPosProj.y = 0.;\n  float fDeltaD = distance(worldPosProj, camWorldProj) / fogAtten * 2.0;\n  float fDeltaY, fDensityIntegral;\n  if (cc_cameraPos.y > _FogTop) {\n    if (wPos.y < _FogTop) {\n      fDeltaY = (_FogTop - wPos.y) / _FogRange * 2.0;\n      fDensityIntegral = fDeltaY * fDeltaY * 0.5;\n    } else {\n      fDeltaY = 0.;\n      fDensityIntegral = 0.;\n    }\n  } else {\n    if (wPos.y < _FogTop) {\n      float fDeltaA = (_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      float fDeltaB = (_FogTop - wPos.y) / _FogRange * 2.;\n      fDeltaY = abs(fDeltaA - fDeltaB);\n      fDensityIntegral = abs((fDeltaA * fDeltaA * 0.5) - (fDeltaB * fDeltaB * 0.5));\n    } else {\n      fDeltaY = abs(_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      fDensityIntegral = abs(fDeltaY * fDeltaY * 0.5);\n    }\n  }\n  float fDensity;\n  if (fDeltaY != 0.) {\n    fDensity = (sqrt(1.0 + ((fDeltaD / fDeltaY) * (fDeltaD / fDeltaY)))) * fDensityIntegral;\n  } else {\n    fDensity = 0.;\n  }\n  float f = exp(-fDensity);\n  return f;\n}\nvoid CC_TRANSFER_FOG_BASE(vec4 pos, out float factor)\n{\n  #if CC_USE_FOG == 0\n\tfactor = LinearFog(pos);\n  #elif CC_USE_FOG == 1\n    factor = ExpFog(pos);\n  #elif CC_USE_FOG == 2\n    factor = ExpSquaredFog(pos);\n  #elif CC_USE_FOG == 3\n    factor = LayeredFog(pos);\n  #else\n    factor = 1.0;\n  #endif\n}\n#if !CC_USE_ACCURATE_FOG\nvarying float v_fog_factor;\n#endif\nvoid CC_TRANSFER_FOG(vec4 pos) {\n#if !CC_USE_ACCURATE_FOG\n    CC_TRANSFER_FOG_BASE(pos, v_fog_factor);\n#endif\n}\n#if USE_VERTEX_COLOR\n  attribute lowp vec4 a_color;\n  varying lowp vec4 v_color;\n#endif\n#if USE_TEXTURE\n  varying vec2 v_uv;\n      uniform vec4 tilingOffset;\n#endif\nvec4 vert () {\n  vec4 position;\n  CCVertInput(position);\n  mat4 matWorld;\n  CCGetWorldMatrix(matWorld);\n  #if USE_TEXTURE\n    v_uv = a_texCoord * tilingOffset.xy + tilingOffset.zw;\n    #if SAMPLE_FROM_RT\n      v_uv = cc_cameraPos.w > 1.0 ? vec2(v_uv.x, 1.0 - v_uv.y) : v_uv;\n    #endif\n  #endif\n  #if USE_VERTEX_COLOR\n    v_color = a_color;\n  #endif\n  CC_TRANSFER_FOG(matWorld * position);\n  return cc_matProj * (cc_matView * matWorld) * position;\n}\nvoid main() { gl_Position = vert(); }","frag":"\nprecision highp float;\nvec3 ACESToneMap (vec3 color) {\n  color = min(color, vec3(8.0));\n  const float A = 2.51;\n  const float B = 0.03;\n  const float C = 2.43;\n  const float D = 0.59;\n  const float E = 0.14;\n  return (color * (A * color + B)) / (color * (C * color + D) + E);\n}\nvec3 SRGBToLinear (vec3 gamma) {\n  return gamma * gamma;\n}\nvec4 CCFragOutput (vec4 color) {\n  #if CC_USE_HDR\n    color.rgb = ACESToneMap(color.rgb);\n  #endif\n  color.rgb = sqrt(color.rgb);\n  return color;\n}\nuniform highp vec4 cc_cameraPos;\n  uniform mediump vec4 cc_fogColor;\n  uniform mediump vec4 cc_fogBase;\n  uniform mediump vec4 cc_fogAdd;\nfloat LinearFog(vec4 pos) {\n  vec4 wPos = pos;\n  float cam_dis = distance(cc_cameraPos, wPos);\n  float fogStart = cc_fogBase.x;\n  float fogEnd = cc_fogBase.y;\n  return clamp((fogEnd - cam_dis) / (fogEnd - fogStart), 0., 1.);\n}\nfloat ExpFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * fogDensity);\n  return f;\n}\nfloat ExpSquaredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float fogStart = cc_fogBase.x;\n  float fogDensity = cc_fogBase.z;\n  float cam_dis = max(distance(cc_cameraPos, wPos) - fogStart, 0.0) / fogAtten * 4.;\n  float f = exp(-cam_dis * cam_dis * fogDensity * fogDensity);\n  return f;\n}\nfloat LayeredFog(vec4 pos) {\n  vec4 wPos = pos;\n  float fogAtten = cc_fogAdd.z;\n  float _FogTop = cc_fogAdd.x;\n  float _FogRange = cc_fogAdd.y;\n  vec3 camWorldProj = cc_cameraPos.xyz;\n  camWorldProj.y = 0.;\n  vec3 worldPosProj = wPos.xyz;\n  worldPosProj.y = 0.;\n  float fDeltaD = distance(worldPosProj, camWorldProj) / fogAtten * 2.0;\n  float fDeltaY, fDensityIntegral;\n  if (cc_cameraPos.y > _FogTop) {\n    if (wPos.y < _FogTop) {\n      fDeltaY = (_FogTop - wPos.y) / _FogRange * 2.0;\n      fDensityIntegral = fDeltaY * fDeltaY * 0.5;\n    } else {\n      fDeltaY = 0.;\n      fDensityIntegral = 0.;\n    }\n  } else {\n    if (wPos.y < _FogTop) {\n      float fDeltaA = (_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      float fDeltaB = (_FogTop - wPos.y) / _FogRange * 2.;\n      fDeltaY = abs(fDeltaA - fDeltaB);\n      fDensityIntegral = abs((fDeltaA * fDeltaA * 0.5) - (fDeltaB * fDeltaB * 0.5));\n    } else {\n      fDeltaY = abs(_FogTop - cc_cameraPos.y) / _FogRange * 2.;\n      fDensityIntegral = abs(fDeltaY * fDeltaY * 0.5);\n    }\n  }\n  float fDensity;\n  if (fDeltaY != 0.) {\n    fDensity = (sqrt(1.0 + ((fDeltaD / fDeltaY) * (fDeltaD / fDeltaY)))) * fDensityIntegral;\n  } else {\n    fDensity = 0.;\n  }\n  float f = exp(-fDensity);\n  return f;\n}\nvoid CC_TRANSFER_FOG_BASE(vec4 pos, out float factor)\n{\n  #if CC_USE_FOG == 0\n\tfactor = LinearFog(pos);\n  #elif CC_USE_FOG == 1\n    factor = ExpFog(pos);\n  #elif CC_USE_FOG == 2\n    factor = ExpSquaredFog(pos);\n  #elif CC_USE_FOG == 3\n    factor = LayeredFog(pos);\n  #else\n    factor = 1.0;\n  #endif\n}\nvoid CC_APPLY_FOG_BASE(inout vec4 color, float factor) {\n  color = vec4(mix(cc_fogColor.rgb, color.rgb, factor), color.a);\n}\n#if !CC_USE_ACCURATE_FOG\nvarying float v_fog_factor;\n#endif\nvoid CC_APPLY_FOG(inout vec4 color) {\n#if !CC_USE_ACCURATE_FOG\n    CC_APPLY_FOG_BASE(color, v_fog_factor);\n#endif\n}\nvoid CC_APPLY_FOG(inout vec4 color, vec3 worldPos) {\n#if CC_USE_ACCURATE_FOG\n    float factor;\n    CC_TRANSFER_FOG_BASE(vec4(worldPos, 1.0), factor);\n#else\n    float factor = v_fog_factor;\n#endif\n    CC_APPLY_FOG_BASE(color, factor);\n}\n#if USE_ALPHA_TEST\n#endif\n#if USE_TEXTURE\n  varying vec2 v_uv;\n  uniform sampler2D mainTexture;\n#endif\n   uniform vec4 mainColor;\n   uniform vec4 colorScaleAndCutoff;\n#if USE_VERTEX_COLOR\n  varying lowp vec4 v_color;\n#endif\nvec4 frag () {\n  vec4 o = mainColor;\n  o.rgb *= colorScaleAndCutoff.xyz;\n  #if USE_VERTEX_COLOR\n    o.rgb *= SRGBToLinear(v_color.rgb);\n    o.a *= v_color.a;\n  #endif\n  #if USE_TEXTURE\n    vec4 texColor = texture2D(mainTexture, v_uv);\n    texColor.rgb = SRGBToLinear(texColor.rgb);\n    o *= texColor;\n  #endif\n  #if USE_ALPHA_TEST\n    if (o.ALPHA_TEST_CHANNEL < colorScaleAndCutoff.w) discard;\n  #endif\n  CC_APPLY_FOG(o);\n  return CCFragOutput(o);\n}\nvoid main() { gl_FragColor = frag(); 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