/// <summary>
/// Recalculate the binormal vectors as the cross product between the tangents and the normals.
/// </summary>
public unsafe void buildBinormalVectors()
{
using (MeshPtr mesh = entity.getMesh())
{
SubMesh subMesh = mesh.Value.getSubMesh(0);
VertexData vertexData = subMesh.vertexData;
VertexDeclaration vertexDeclaration = vertexData.vertexDeclaration;
VertexBufferBinding vertexBinding = vertexData.vertexBufferBinding;
VertexElement normalElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_NORMAL);
VertexElement tangentElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_TANGENT);
VertexElement binormalElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_BINORMAL);
int numVertices = vertexData.vertexCount.ToInt32();
HardwareVertexBufferSharedPtr normalHardwareBuffer = vertexBinding.getBuffer(normalElement.getSource());
int normalVertexSize = normalHardwareBuffer.Value.getVertexSize().ToInt32();
byte *normalBuffer = (byte *)normalHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_READ_ONLY);
HardwareVertexBufferSharedPtr tangentHardwareBuffer = vertexBinding.getBuffer(tangentElement.getSource());
int tangetVertexSize = tangentHardwareBuffer.Value.getVertexSize().ToInt32();
byte *tangentBuffer = (byte *)tangentHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_READ_ONLY);
HardwareVertexBufferSharedPtr binormalHardwareBuffer = vertexBinding.getBuffer(binormalElement.getSource());
int binormalVertexSize = binormalHardwareBuffer.Value.getVertexSize().ToInt32();
byte *binormalBuffer = (byte *)binormalHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_NORMAL);
Vector3 *normal;
Vector3 *tangent;
Vector3 *binormal;
for (int i = 0; i < numVertices; ++i)
{
normalElement.baseVertexPointerToElement(normalBuffer, (float **)&normal);
tangentElement.baseVertexPointerToElement(tangentBuffer, (float **)&tangent);
binormalElement.baseVertexPointerToElement(binormalBuffer, (float **)&binormal);
*binormal = normal->cross(ref *tangent) * -1.0f;
normalBuffer += normalVertexSize;
tangentBuffer += tangetVertexSize;
binormalBuffer += binormalVertexSize;
}
normalHardwareBuffer.Value.unlock();
tangentHardwareBuffer.Value.unlock();
binormalHardwareBuffer.Value.unlock();
normalHardwareBuffer.Dispose();
tangentHardwareBuffer.Dispose();
binormalHardwareBuffer.Dispose();
}
}
public unsafe void inverseTangentW()
{
using (MeshPtr mesh = entity.getMesh())
{
SubMesh subMesh = mesh.Value.getSubMesh(0);
VertexData vertexData = subMesh.vertexData;
VertexDeclaration vertexDeclaration = vertexData.vertexDeclaration;
VertexBufferBinding vertexBinding = vertexData.vertexBufferBinding;
VertexElement tangentElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_TANGENT);
int numVertices = vertexData.vertexCount.ToInt32();
HardwareVertexBufferSharedPtr tangentHardwareBuffer = vertexBinding.getBuffer(tangentElement.getSource());
int tangetVertexSize = tangentHardwareBuffer.Value.getVertexSize().ToInt32();
byte *tangentBuffer = (byte *)tangentHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_NORMAL);
Vector4 *tangent;
for (int i = 0; i < numVertices; ++i)
{
tangentElement.baseVertexPointerToElement(tangentBuffer, (float **)&tangent);
tangent->w = -tangent->w;
tangentBuffer += tangetVertexSize;
}
tangentHardwareBuffer.Value.unlock();
tangentHardwareBuffer.Dispose();
}
}
internal unsafe void saveModelJSON(string filename)
{
StringBuilder sb = new StringBuilder();
using (MeshPtr mesh = entity.getMesh())
{
SubMesh subMesh = mesh.Value.getSubMesh(0);
VertexData vertexData = subMesh.vertexData;
VertexDeclaration vertexDeclaration = vertexData.vertexDeclaration;
VertexBufferBinding vertexBinding = vertexData.vertexBufferBinding;
VertexElement normalElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_NORMAL);
VertexElement tangentElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_TANGENT);
VertexElement binormalElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_BINORMAL);
VertexElement uvElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_TEXTURE_COORDINATES);
VertexElement positionElement = vertexDeclaration.findElementBySemantic(VertexElementSemantic.VES_POSITION);
int numVertices = vertexData.vertexCount.ToInt32();
HardwareVertexBufferSharedPtr normalHardwareBuffer = vertexBinding.getBuffer(normalElement.getSource());
int normalVertexSize = normalHardwareBuffer.Value.getVertexSize().ToInt32();
byte *normalBuffer = (byte *)normalHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_READ_ONLY);
HardwareVertexBufferSharedPtr tangentHardwareBuffer = vertexBinding.getBuffer(tangentElement.getSource());
int tangetVertexSize = tangentHardwareBuffer.Value.getVertexSize().ToInt32();
byte *tangentBuffer = (byte *)tangentHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_READ_ONLY);
HardwareVertexBufferSharedPtr binormalHardwareBuffer = vertexBinding.getBuffer(binormalElement.getSource());
int binormalVertexSize = binormalHardwareBuffer.Value.getVertexSize().ToInt32();
byte *binormalBuffer = (byte *)binormalHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_NORMAL);
HardwareVertexBufferSharedPtr uvHardwareBuffer = vertexBinding.getBuffer(uvElement.getSource());
int uvVertexSize = uvHardwareBuffer.Value.getVertexSize().ToInt32();
byte *uvBuffer = (byte *)uvHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_NORMAL);
HardwareVertexBufferSharedPtr positionHardwareBuffer = vertexBinding.getBuffer(positionElement.getSource());
int positionVertexSize = positionHardwareBuffer.Value.getVertexSize().ToInt32();
byte *positionBuffer = (byte *)positionHardwareBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_NORMAL);
Vector3 *normal;
Vector3 *tangent;
Vector3 *binormal;
Vector3 *uv;
Vector3 *position;
IndexData indexData = subMesh.indexData;
sb.AppendFormat(@"{{
""metadata"":
{{
""sourceFile"": ""Skull.max"",
""generatedBy"": ""3ds max ThreeJSExporter"",
""formatVersion"": 3,
""vertices"": {0},
""normals"": {1},
""colors"": 0,
""uvs"": {2},
""triangles"": {3},
""materials"": 1
}},
""materials"": [
{{
""DbgIndex"" : 0,
""DbgName"" : ""Material #327"",
""colorDiffuse"" : [0.5880, 0.5880, 0.5880],
""colorAmbient"" : [0.5880, 0.5880, 0.5880],
""colorSpecular"" : [0.9000, 0.9000, 0.9000],
""transparency"" : 1.0,
""specularCoef"" : 10.0,
""vertexColors"" : false
}}
],
", numVertices, numVertices, numVertices, indexData.IndexBuffer.Value.getNumIndexes().ToInt32() / 3);
StringBuilder vertexStringBuilder = new StringBuilder("\n\n\"vertices\": [");
StringBuilder normalStringBuilder = new StringBuilder("\n\n\"normals\": [");
StringBuilder uvStringBuilder = new StringBuilder("\n\n\"uvs\": [[");
String appendString = "{0},{1},{2}";
for (int i = 0; i < numVertices; ++i)
{
normalElement.baseVertexPointerToElement(normalBuffer, (float **)&normal);
tangentElement.baseVertexPointerToElement(tangentBuffer, (float **)&tangent);
binormalElement.baseVertexPointerToElement(binormalBuffer, (float **)&binormal);
uvElement.baseVertexPointerToElement(uvBuffer, (float **)&uv);
positionElement.baseVertexPointerToElement(positionBuffer, (float **)&position);
//*binormal = normal->cross(ref *tangent) * -1.0f;
vertexStringBuilder.AppendFormat(appendString, position->x, position->y, position->z);
normalStringBuilder.AppendFormat(appendString, normal->x, normal->y, normal->z);
uvStringBuilder.AppendFormat(appendString, uv->x, uv->y, uv->z);
normalBuffer += normalVertexSize;
tangentBuffer += tangetVertexSize;
binormalBuffer += binormalVertexSize;
uvBuffer += uvVertexSize;
positionBuffer += positionVertexSize;
appendString = ",{0},{1},{2}";
}
vertexStringBuilder.Append("],");
normalStringBuilder.Append("],");
uvStringBuilder.Append("]],");
normalHardwareBuffer.Value.unlock();
tangentHardwareBuffer.Value.unlock();
binormalHardwareBuffer.Value.unlock();
uvHardwareBuffer.Value.unlock();
positionHardwareBuffer.Value.unlock();
normalHardwareBuffer.Dispose();
tangentHardwareBuffer.Dispose();
binormalHardwareBuffer.Dispose();
uvHardwareBuffer.Dispose();
positionHardwareBuffer.Dispose();
sb.Append(vertexStringBuilder.ToString());
sb.Append(normalStringBuilder.ToString());
sb.Append(uvStringBuilder.ToString());
sb.Append("\n\n\"colors\": [],");
StringBuilder triangleStringBuilder = new StringBuilder("\n\n\"faces\": [");
int numFaces = indexData.IndexBuffer.Value.getNumIndexes().ToInt32();
int indexSize = indexData.IndexBuffer.Value.getIndexSize().ToInt32();
byte *indexBuffer = (byte *)indexData.IndexBuffer.Value.lockBuf(HardwareBuffer.LockOptions.HBL_READ_ONLY);
appendString = "{0}";
switch (indexData.IndexBuffer.Value.getType())
{
case HardwareIndexBuffer.IndexType.IT_16BIT:
for (int i = 0; i < numFaces; ++i)
{
triangleStringBuilder.AppendFormat(appendString, *(short *)indexBuffer);
indexBuffer += indexSize;
appendString = ",{0}";
}
break;
case HardwareIndexBuffer.IndexType.IT_32BIT:
for (int i = 0; i < numFaces; ++i)
{
triangleStringBuilder.AppendFormat(appendString, *(int *)indexBuffer);
indexBuffer += indexSize;
appendString = ",{0}";
}
break;
}
triangleStringBuilder.Append("]");
sb.Append(triangleStringBuilder.ToString());
sb.Append("\n\n}");
}
using (StreamWriter fileStream = new StreamWriter(File.Open(filename, FileMode.Create, FileAccess.Write)))
{
fileStream.Write(sb.ToString());
}
}
