export declare const SdefVertex = "\n#ifndef SDEFVERTEX\n#define SDEFVERTEX\n\n#if !defined(BAKED_VERTEX_ANIMATION_TEXTURE) && defined(SDEF)\n\n#if NUM_BONE_INFLUENCERS > 0\n{\n    let weight0: f32 = vertexInputs.matricesWeights[0];\n    let weight1: f32 = vertexInputs.matricesWeights[1];\n\n    #ifdef BONETEXTURE\n        let transformMatrix0: mat4x4f = readMatrixFromRawSampler(boneSampler, vertexInputs.matricesIndices[0]);\n        let transformMatrix1: mat4x4f = readMatrixFromRawSampler(boneSampler, vertexInputs.matricesIndices[1]);\n    #else\n        let transformMatrix0: mat4x4f = uniforms.mBones[int(vertexInputs.matricesIndices[0])];\n        let transformMatrix1: mat4x4f = uniforms.mBones[int(vertexInputs.matricesIndices[1])];\n    #endif\n\n    let slerpedRotationMatrix: mat3x3f = quaternionToRotationMatrix(slerp(\n        rotationMatrixToQuaternion(mat3x3f(transformMatrix0[0].xyz, transformMatrix0[1].xyz, transformMatrix0[2].xyz)),\n        rotationMatrixToQuaternion(mat3x3f(transformMatrix1[0].xyz, transformMatrix1[1].xyz, transformMatrix1[2].xyz)),\n        weight1\n    ));\n\n    // -center transform\n    var sdefInflunce: mat4x4f = mat4x4f(\n        vec4f(1.0, 0.0, 0.0, 0.0),\n        vec4f(0.0, 1.0, 0.0, 0.0),\n        vec4f(0.0, 0.0, 1.0, 0.0),\n        vec4f(-vertexInputs.matricesSdefC, 1.0)\n    );\n\n    // rotation\n    let rotationMatrix: mat4x4f = mat4x4f(\n        vec4f(slerpedRotationMatrix[0], 0.0),\n        vec4f(slerpedRotationMatrix[1], 0.0),\n        vec4f(slerpedRotationMatrix[2], 0.0),\n        vec4f(0.0, 0.0, 0.0, 1.0)\n    );\n    sdefInflunce = rotationMatrix * sdefInflunce;\n\n    // add position offset\n    let positionOffset: vec3f =\n        (transformMatrix0 * vec4f(vertexInputs.matricesSdefRW0, 1)).xyz * weight0 +\n        (transformMatrix1 * vec4f(vertexInputs.matricesSdefRW1, 1)).xyz * weight1;\n\n    sdefInflunce[3] += vec4f(positionOffset, 0.0);\n    \n    let useLinearDeform: f32 = step(0.0, -abs(vertexInputs.matricesSdefRW0.x));\n\n    influence = mat4x4f(\n        mix(sdefInflunce[0], influence[0], useLinearDeform),\n        mix(sdefInflunce[1], influence[1], useLinearDeform),\n        mix(sdefInflunce[2], influence[2], useLinearDeform),\n        mix(sdefInflunce[3], influence[3], useLinearDeform)\n    );\n}\n#endif\n\n#endif\n\n#endif\n";