declare const shader = "\n#ifdef SKIN\nattribute vec4 a_bones;\nattribute vec4 a_weights;\n\nvoid transformSkin(inout vec3 position, inout vec3 normal, inout vec3 tangent, inout vec3 binormal) {\n  mat4 bone;\n\n  bone += fetchMatrix(a_bones[0], 0.0) * a_weights[0];\n  bone += fetchMatrix(a_bones[1], 0.0) * a_weights[1];\n  bone += fetchMatrix(a_bones[2], 0.0) * a_weights[2];\n  bone += fetchMatrix(a_bones[3], 0.0) * a_weights[3];\n\n  mat3 rotation = mat3(bone);\n\n  position = vec3(bone * vec4(position, 1.0));\n  normal = rotation * normal;\n  tangent = rotation * tangent;\n  binormal = rotation * binormal;\n}\n#else\nattribute vec4 a_bones;\n#ifdef EXTENDED_BONES\nattribute vec4 a_extendedBones;\n#endif\nattribute float a_boneNumber;\n\nmat4 getVertexGroupMatrix() {\n  mat4 bone;\n\n  // For the broken models out there, since the game supports this.\n  if (a_boneNumber > 0.0) {\n    for (int i = 0; i < 4; i++) {\n      if (a_bones[i] > 0.0) {\n        bone += fetchMatrix(a_bones[i] - 1.0, 0.0);\n      }\n    }\n\n    #ifdef EXTENDED_BONES\n      for (int i = 0; i < 4; i++) {\n        if (a_extendedBones[i] > 0.0) {\n          bone += fetchMatrix(a_extendedBones[i] - 1.0, 0.0);\n        }\n      }\n    #endif\n  }\n\n  return bone / a_boneNumber;\n}\n\nvoid transformVertexGroups(inout vec3 position, inout vec3 normal) {\n  mat4 bone = getVertexGroupMatrix();\n  mat3 rotation = mat3(bone);\n\n  position = vec3(bone * vec4(position, 1.0));\n  normal = normalize(rotation * normal);\n}\n\nvoid transformVertexGroupsHD(inout vec3 position, inout vec3 normal, inout vec3 tangent, inout vec3 binormal) {\n  mat4 bone = getVertexGroupMatrix();\n  mat3 rotation = mat3(bone);\n\n  position = vec3(bone * vec4(position, 1.0));\n  normal = normalize(rotation * normal);\n  tangent = normalize(rotation * tangent);\n  binormal = normalize(rotation * binormal);\n}\n#endif\n";
export default shader;