private void _exportMorphTargets(BabylonMesh babylonMesh, BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFBuffer buffer, GLTFMeshPrimitive meshPrimitive, List <float> weights) { var gltfMorphTargets = new List <GLTFMorphTarget>(); foreach (var babylonMorphTarget in babylonMorphTargetManager.targets) { var gltfMorphTarget = new GLTFMorphTarget(); // Positions if (babylonMorphTarget.positions != null) { var accessorTargetPositions = GLTFBufferService.Instance.CreateAccessor( gltf, GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer), "accessorTargetPositions", GLTFAccessor.ComponentType.FLOAT, GLTFAccessor.TypeEnum.VEC3 ); gltfMorphTarget.Add(GLTFMorphTarget.Attribute.POSITION.ToString(), accessorTargetPositions.index); // Populate accessor accessorTargetPositions.min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue }; accessorTargetPositions.max = new float[] { float.MinValue, float.MinValue, float.MinValue }; for (int indexPosition = 0; indexPosition < babylonMorphTarget.positions.Length; indexPosition += 3) { var positionTarget = Tools.SubArray(babylonMorphTarget.positions, indexPosition, 3); // Babylon stores morph target information as final data while glTF expects deltas from mesh primitive var positionMesh = Tools.SubArray(babylonMesh.positions, indexPosition, 3); for (int indexCoordinate = 0; indexCoordinate < positionTarget.Length; indexCoordinate++) { positionTarget[indexCoordinate] = positionTarget[indexCoordinate] - positionMesh[indexCoordinate]; } // Store values as bytes foreach (var coordinate in positionTarget) { accessorTargetPositions.bytesList.AddRange(BitConverter.GetBytes(coordinate)); } // Update min and max values GLTFBufferService.UpdateMinMaxAccessor(accessorTargetPositions, positionTarget); } accessorTargetPositions.count = babylonMorphTarget.positions.Length / 3; } // Normals if (babylonMorphTarget.normals != null) { var accessorTargetNormals = GLTFBufferService.Instance.CreateAccessor( gltf, GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer), "accessorTargetNormals", GLTFAccessor.ComponentType.FLOAT, GLTFAccessor.TypeEnum.VEC3 ); gltfMorphTarget.Add(GLTFMorphTarget.Attribute.NORMAL.ToString(), accessorTargetNormals.index); // Populate accessor for (int indexNormal = 0; indexNormal < babylonMorphTarget.positions.Length; indexNormal += 3) { var normalTarget = Tools.SubArray(babylonMorphTarget.normals, indexNormal, 3); // Babylon stores morph target information as final data while glTF expects deltas from mesh primitive var normalMesh = Tools.SubArray(babylonMesh.normals, indexNormal, 3); for (int indexCoordinate = 0; indexCoordinate < normalTarget.Length; indexCoordinate++) { normalTarget[indexCoordinate] = normalTarget[indexCoordinate] - normalMesh[indexCoordinate]; } // Store values as bytes foreach (var coordinate in normalTarget) { accessorTargetNormals.bytesList.AddRange(BitConverter.GetBytes(coordinate)); } } accessorTargetNormals.count = babylonMorphTarget.normals.Length / 3; } if (gltfMorphTarget.Count > 0) { gltfMorphTargets.Add(gltfMorphTarget); weights.Add(babylonMorphTarget.influence); } } if (gltfMorphTargets.Count > 0) { meshPrimitive.targets = gltfMorphTargets.ToArray(); } }
private void _exportMorphTargets(BabylonMesh babylonMesh, BabylonSubMesh babylonSubMesh, BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFBuffer buffer, GLTFMeshPrimitive meshPrimitive) { var gltfMorphTargets = new List <GLTFMorphTarget>(); foreach (var babylonMorphTarget in babylonMorphTargetManager.targets) { var gltfMorphTarget = new GLTFMorphTarget(); // Positions if (babylonMorphTarget.positions != null) { var accessorTargetPositions = GLTFBufferService.Instance.CreateAccessor( gltf, GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer), "accessorTargetPositions", GLTFAccessor.ComponentType.FLOAT, GLTFAccessor.TypeEnum.VEC3 ); gltfMorphTarget.Add(GLTFMorphTarget.Attribute.POSITION.ToString(), accessorTargetPositions.index); // Populate accessor int nbComponents = 3; // Vector3 int startIndex = babylonSubMesh.verticesStart * nbComponents; int endIndex = startIndex + babylonSubMesh.verticesCount * nbComponents; accessorTargetPositions.min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue }; accessorTargetPositions.max = new float[] { float.MinValue, float.MinValue, float.MinValue }; for (int indexPosition = startIndex; indexPosition < endIndex; indexPosition += 3) { var positionTarget = ArrayExtension.SubArray(babylonMorphTarget.positions, indexPosition, 3); // Babylon stores morph target information as final data while glTF expects deltas from mesh primitive var positionMesh = ArrayExtension.SubArray(babylonMesh.positions, indexPosition, 3); for (int indexCoordinate = 0; indexCoordinate < positionTarget.Length; indexCoordinate++) { positionTarget[indexCoordinate] = positionTarget[indexCoordinate] - positionMesh[indexCoordinate]; } positionTarget[2] *= -1; // Store values as bytes foreach (var coordinate in positionTarget) { accessorTargetPositions.bytesList.AddRange(BitConverter.GetBytes(coordinate)); } // Update min and max values GLTFBufferService.UpdateMinMaxAccessor(accessorTargetPositions, positionTarget); } accessorTargetPositions.count = babylonSubMesh.verticesCount; } // Normals if (babylonMorphTarget.normals != null && exportParameters.exportMorphNormals) { var accessorTargetNormals = GLTFBufferService.Instance.CreateAccessor( gltf, GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer), "accessorTargetNormals", GLTFAccessor.ComponentType.FLOAT, GLTFAccessor.TypeEnum.VEC3 ); gltfMorphTarget.Add(GLTFMorphTarget.Attribute.NORMAL.ToString(), accessorTargetNormals.index); // Populate accessor int nbComponents = 3; // Vector3 int startIndex = babylonSubMesh.verticesStart * nbComponents; int endIndex = startIndex + babylonSubMesh.verticesCount * nbComponents; for (int indexNormal = startIndex; indexNormal < endIndex; indexNormal += 3) { var normalTarget = ArrayExtension.SubArray(babylonMorphTarget.normals, indexNormal, 3); // Babylon stores morph target information as final data while glTF expects deltas from mesh primitive var normalMesh = ArrayExtension.SubArray(babylonMesh.normals, indexNormal, 3); for (int indexCoordinate = 0; indexCoordinate < normalTarget.Length; indexCoordinate++) { normalTarget[indexCoordinate] = normalTarget[indexCoordinate] - normalMesh[indexCoordinate]; } normalTarget[2] *= -1; // Store values as bytes foreach (var coordinate in normalTarget) { accessorTargetNormals.bytesList.AddRange(BitConverter.GetBytes(coordinate)); } } accessorTargetNormals.count = babylonSubMesh.verticesCount; } // Tangents if (babylonMorphTarget.tangents != null && exportParameters.exportTangents) { var accessorTargetTangents = GLTFBufferService.Instance.CreateAccessor( gltf, GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer), "accessorTargetTangents", GLTFAccessor.ComponentType.FLOAT, GLTFAccessor.TypeEnum.VEC3 ); gltfMorphTarget.Add(GLTFMeshPrimitive.Attribute.TANGENT.ToString(), accessorTargetTangents.index); // Populate accessor // Note that the w component for handedness is omitted when targeting TANGENT data since handedness cannot be displaced. int nbComponents = 4; // Vector4 int startIndex = babylonSubMesh.verticesStart * nbComponents; int endIndex = startIndex + babylonSubMesh.verticesCount * nbComponents; for (int indexTangent = startIndex; indexTangent < endIndex; indexTangent += 4) { var tangentTarget = ArrayExtension.SubArray(babylonMorphTarget.tangents, indexTangent, 3); // Babylon stores morph target information as final data while glTF expects deltas from mesh primitive var tangentMesh = ArrayExtension.SubArray(babylonMesh.tangents, indexTangent, 3); for (int indexCoordinate = 0; indexCoordinate < tangentTarget.Length; indexCoordinate++) { tangentTarget[indexCoordinate] = tangentTarget[indexCoordinate] - tangentMesh[indexCoordinate]; } tangentTarget[2] *= -1; // Store values as bytes foreach (var coordinate in tangentTarget) { accessorTargetTangents.bytesList.AddRange(BitConverter.GetBytes(coordinate)); } } accessorTargetTangents.count = babylonSubMesh.verticesCount; } gltfMorphTargets.Add(gltfMorphTarget); } if (gltfMorphTargets.Count > 0) { meshPrimitive.targets = gltfMorphTargets.ToArray(); } }