public static void CopyBoneAssignments(SubMesh dst, SubMesh src, Dictionary<uint, uint> vertexIdMap)
{
foreach (KeyValuePair<uint, uint> vertexMapping in vertexIdMap) {
if (!src.BoneAssignmentList.ContainsKey((int)vertexMapping.Key))
continue;
List<VertexBoneAssignment> srcVbaList = src.BoneAssignmentList[(int)vertexMapping.Key];
foreach (VertexBoneAssignment srcVba in srcVbaList) {
Debug.Assert(srcVba.vertexIndex == (int)vertexMapping.Key);
VertexBoneAssignment dstVba = new VertexBoneAssignment();
dstVba.boneIndex = srcVba.boneIndex;
dstVba.vertexIndex = (int)vertexMapping.Value;
dstVba.weight = srcVba.weight;
dst.AddBoneAssignment(dstVba);
}
}
}
private void _generateCurvedPlaneVertexData( HardwareVertexBuffer vbuf, int ySegments, int xSegments, float xSpace, float halfWidth, float ySpace, float halfHeight, Matrix4 transform, bool firstTime, bool normals, Matrix4 rotation, float curvature, int numTexCoordSets, float xTexCoord, float yTexCoord, SubMesh subMesh, ref Vector3 min, ref Vector3 max, ref float maxSquaredLength )
{
Vector3 vec;
unsafe
{
// lock the vertex buffer
IntPtr data = vbuf.Lock( BufferLocking.Discard );
float* pData = (float*)data.ToPointer();
for ( int y = 0; y <= ySegments; y++ )
{
for ( int x = 0; x <= xSegments; x++ )
{
// centered on origin
vec.x = ( x * xSpace ) - halfWidth;
vec.y = ( y * ySpace ) - halfHeight;
// Here's where curved plane is different from standard plane. Amazing, I know.
Real diff_x = ( x - ( (Real)xSegments / 2 ) ) / (Real)xSegments;
Real diff_y = ( y - ( (Real)ySegments / 2 ) ) / (Real)ySegments;
Real dist = Utility.Sqrt( diff_x * diff_x + diff_y * diff_y );
vec.z = ( -Utility.Sin( ( 1 - dist ) * ( Utility.PI / 2 ) ) * curvature ) + curvature;
// Transform by orientation and distance
Vector3 pos = transform.TransformAffine( vec );
*pData++ = pos.x;
*pData++ = pos.y;
*pData++ = pos.z;
// Build bounds as we go
if ( firstTime )
{
min = vec;
max = vec;
maxSquaredLength = vec.LengthSquared;
firstTime = false;
}
else
{
min.Floor( vec );
max.Ceil( vec );
maxSquaredLength = Utility.Max( maxSquaredLength, vec.LengthSquared );
}
if ( normals )
{
// This part is kinda 'wrong' for curved planes... but curved planes are
// very valuable outside sky planes, which don't typically need normals
// so I'm not going to mess with it for now.
// Default normal is along unit Z
//vec = Vector3::UNIT_Z;
// Rotate
vec = rotation.TransformAffine( vec );
*pData++ = vec.x;
*pData++ = vec.y;
*pData++ = vec.z;
}
for ( int i = 0; i < numTexCoordSets; i++ )
{
*pData++ = x * xTexCoord;
*pData++ = 1 - ( y * yTexCoord );
} // for texCoords
} // for x
} // for y
// unlock the buffer
vbuf.Unlock();
subMesh.useSharedVertices = true;
} // unsafe
}
/// <summary>
/// Used to generate a face list based on vertices.
/// </summary>
private void _tesselate2DMesh( SubMesh subMesh, int width, int height, bool doubleSided, BufferUsage indexBufferUsage, bool indexShadowBuffer )
{
int vInc, uInc, v, u, iterations;
int vCount, uCount;
vInc = 1;
v = 0;
iterations = doubleSided ? 2 : 1;
// setup index count
subMesh.indexData.indexCount = ( width - 1 ) * ( height - 1 ) * 2 * iterations * 3;
// create the index buffer using the current API
subMesh.indexData.indexBuffer =
HardwareBufferManager.Instance.CreateIndexBuffer( IndexType.Size16, subMesh.indexData.indexCount, indexBufferUsage, indexShadowBuffer );
short v1, v2, v3;
// grab a reference for easy access
HardwareIndexBuffer idxBuffer = subMesh.indexData.indexBuffer;
// lock the whole index buffer
IntPtr data = idxBuffer.Lock( BufferLocking.Discard );
unsafe
{
short* pIndex = (short*)data.ToPointer();
while ( 0 < iterations-- )
{
// make tris in a zigzag pattern (strip compatible)
u = 0;
uInc = 1;
vCount = height - 1;
while ( 0 < vCount-- )
{
uCount = width - 1;
while ( 0 < uCount-- )
{
// First Tri in cell
// -----------------
v1 = (short)( ( ( v + vInc ) * width ) + u );
v2 = (short)( ( v * width ) + u );
v3 = (short)( ( ( v + vInc ) * width ) + ( u + uInc ) );
// Output indexes
*pIndex++ = v1;
*pIndex++ = v2;
*pIndex++ = v3;
// Second Tri in cell
// ------------------
v1 = (short)( ( ( v + vInc ) * width ) + ( u + uInc ) );
v2 = (short)( ( v * width ) + u );
v3 = (short)( ( v * width ) + ( u + uInc ) );
// Output indexes
*pIndex++ = v1;
*pIndex++ = v2;
*pIndex++ = v3;
// Next column
u += uInc;
} // while uCount
v += vInc;
u = 0;
} // while vCount
v = height - 1;
vInc = -vInc;
} // while iterations
}// unsafe
// unlock the buffer
idxBuffer.Unlock();
}
public void AddSubmesh(SubMesh subMesh)
{
subMeshes.Add(subMesh);
AddSubmeshIndexData(subMesh.IndexData);
foreach (IndexData indexData in subMesh.LodFaceList)
AddSubmeshIndexData(indexData);
}
public static void CopySubMesh(SubMesh dstSubMesh, SubMesh srcSubMesh, SubMeshData subMeshData)
{
dstSubMesh.OperationType = srcSubMesh.OperationType;
dstSubMesh.useSharedVertices = srcSubMesh.useSharedVertices;
dstSubMesh.MaterialName = srcSubMesh.MaterialName;
CopyIndexData(dstSubMesh.IndexData, srcSubMesh.IndexData, subMeshData.VertexIdMap);
if (!srcSubMesh.useSharedVertices) {
dstSubMesh.useSharedVertices = false;
dstSubMesh.vertexData = new VertexData();
CopyVertexData(dstSubMesh.VertexData, srcSubMesh.VertexData, subMeshData.VertexIdMap);
CopyBoneAssignments(dstSubMesh, srcSubMesh, subMeshData.VertexIdMap);
}
Debug.Assert(srcSubMesh.VertexAnimationType == VertexAnimationType.None);
}
/// <summary>
/// Look up or calculate the geometry data to use for this SubMesh
/// </summary>
/// <param name="sm"> </param>
/// <returns> </returns>
public List<SubMeshLodGeometryLink> DetermineGeometry( SubMesh sm )
{
// First, determine if we've already seen this submesh before
if ( mSubMeshGeometryLookup.ContainsKey( sm ) )
{
return mSubMeshGeometryLookup[ sm ];
}
// Otherwise, we have to create a new one
var lodList = new List<SubMeshLodGeometryLink>();
mSubMeshGeometryLookup[ sm ] = lodList;
int numLods = sm.Parent.IsLodManual ? 1 : sm.Parent.LodLevelCount;
lodList.Capacity = numLods;
for ( int lod = 0; lod < numLods; ++lod )
{
SubMeshLodGeometryLink geomLink = lodList[ lod ];
IndexData lodIndexData;
if ( lod == 0 )
{
lodIndexData = sm.IndexData;
}
else
{
lodIndexData = sm.LodFaceList[ lod - 1 ];
}
// Can use the original mesh geometry?
if ( sm.useSharedVertices )
{
if ( sm.Parent.SubMeshCount == 1 )
{
// Ok, this is actually our own anyway
geomLink.vertexData = sm.Parent.SharedVertexData;
geomLink.indexData = lodIndexData;
}
else
{
// We have to split it
SplitGeometry( sm.Parent.SharedVertexData,
lodIndexData, ref geomLink );
}
}
else
{
if ( lod == 0 )
{
// Ok, we can use the existing geometry; should be in full
// use by just this SubMesh
geomLink.vertexData = sm.vertexData;
geomLink.indexData = sm.indexData;
}
else
{
// We have to split it
SplitGeometry( sm.vertexData,
lodIndexData, ref geomLink );
}
}
Debug.Assert( geomLink.vertexData.vertexStart == 0,
"Cannot use vertexStart > 0 on indexed geometry due to rendersystem incompatibilities - see the docs!" );
}
return lodList;
}
protected void WriteSubMeshTextureAliases(BinaryWriter writer, SubMesh subMesh)
{
LogManager.Instance.Write("Exporting submesh texture aliases...");
foreach (KeyValuePair<string, string> pair in subMesh.TextureAliases) {
long start_offset = writer.Seek(0, SeekOrigin.Current);
WriteChunk(writer, MeshChunkID.SubMeshTextureAlias, 0);
WriteString(writer, pair.Key);
WriteString(writer, pair.Value);
long end_offset = writer.Seek(0, SeekOrigin.Current);
writer.Seek((int)start_offset, SeekOrigin.Begin);
WriteChunk(writer, MeshChunkID.SubMeshTextureAlias, (int)(end_offset - start_offset));
writer.Seek((int)end_offset, SeekOrigin.Begin);
}
}
/// <summary>
/// This is only used if the SceneManager chooses to render the node. This option can be set
/// for SceneNodes at SceneManager.DisplaySceneNodes, and for entities based on skeletal
/// models using Entity.DisplaySkeleton = true.
/// </summary>
public void GetRenderOperation(RenderOperation op)
{
if(nodeSubMesh == null) {
Mesh nodeMesh = MeshManager.Instance.Load("axes.mesh");
nodeSubMesh = nodeMesh.GetSubMesh(0);
}
// return the render operation of the submesh itself
nodeSubMesh.GetRenderOperation(op);
}
protected void ReadBoneAssignments(XmlNode node, SubMesh subMesh)
{
foreach (XmlNode childNode in node.ChildNodes) {
switch (childNode.Name) {
case "vertexboneassignment":
ReadVertexBoneAssigment(childNode, subMesh);
break;
default:
DebugMessage(childNode);
break;
}
}
}
/// <summary>
/// Look up or calculate the geometry data to use for this SubMesh
/// </summary>
/// <param name="sm"> </param>
/// <returns> </returns>
public List <SubMeshLodGeometryLink> DetermineGeometry(SubMesh sm)
{
// First, determine if we've already seen this submesh before
if (mSubMeshGeometryLookup.ContainsKey(sm))
{
return(mSubMeshGeometryLookup[sm]);
}
// Otherwise, we have to create a new one
var lodList = new List <SubMeshLodGeometryLink>();
mSubMeshGeometryLookup[sm] = lodList;
int numLods = sm.Parent.IsLodManual ? 1 : sm.Parent.LodLevelCount;
lodList.Capacity = numLods;
for (int lod = 0; lod < numLods; ++lod)
{
SubMeshLodGeometryLink geomLink = lodList[lod];
IndexData lodIndexData;
if (lod == 0)
{
lodIndexData = sm.IndexData;
}
else
{
lodIndexData = sm.LodFaceList[lod - 1];
}
// Can use the original mesh geometry?
if (sm.useSharedVertices)
{
if (sm.Parent.SubMeshCount == 1)
{
// Ok, this is actually our own anyway
geomLink.vertexData = sm.Parent.SharedVertexData;
geomLink.indexData = lodIndexData;
}
else
{
// We have to split it
SplitGeometry(sm.Parent.SharedVertexData,
lodIndexData, ref geomLink);
}
}
else
{
if (lod == 0)
{
// Ok, we can use the existing geometry; should be in full
// use by just this SubMesh
geomLink.vertexData = sm.vertexData;
geomLink.indexData = sm.indexData;
}
else
{
// We have to split it
SplitGeometry(sm.vertexData,
lodIndexData, ref geomLink);
}
}
Debug.Assert(geomLink.vertexData.vertexStart == 0,
"Cannot use vertexStart > 0 on indexed geometry due to rendersystem incompatibilities - see the docs!");
}
return(lodList);
}
/// <summary>
/// Used to generate a face list based on vertices.
/// </summary>
/// <param name="subMesh"></param>
/// <param name="xSegments"></param>
/// <param name="ySegments"></param>
/// <param name="doubleSided"></param>
private void Tesselate2DMesh(SubMesh subMesh, int width, int height, bool doubleSided, BufferUsage indexBufferUsage, bool indexShadowBuffer)
{
int vInc, uInc, v, u, iterations;
int vCount, uCount;
vInc = 1;
v = 0;
iterations = doubleSided ? 2 : 1;
// setup index count
subMesh.indexData.indexCount = (width - 1) * (height - 1) * 2 * iterations * 3;
// create the index buffer using the current API
subMesh.indexData.indexBuffer =
HardwareBufferManager.Instance.CreateIndexBuffer(IndexType.Size16, subMesh.indexData.indexCount, indexBufferUsage, indexShadowBuffer);
short v1, v2, v3;
// grab a reference for easy access
HardwareIndexBuffer idxBuffer = subMesh.indexData.indexBuffer;
// lock the whole index buffer
IntPtr data = idxBuffer.Lock(BufferLocking.Discard);
unsafe {
short *pIndex = (short *)data.ToPointer();
while (0 < iterations--)
{
// make tris in a zigzag pattern (strip compatible)
u = 0;
uInc = 1;
vCount = height - 1;
while (0 < vCount--)
{
uCount = width - 1;
while (0 < uCount--)
{
// First Tri in cell
// -----------------
v1 = (short)(((v + vInc) * width) + u);
v2 = (short)((v * width) + u);
v3 = (short)(((v + vInc) * width) + (u + uInc));
// Output indexes
*pIndex++ = v1;
*pIndex++ = v2;
*pIndex++ = v3;
// Second Tri in cell
// ------------------
v1 = (short)(((v + vInc) * width) + (u + uInc));
v2 = (short)((v * width) + u);
v3 = (short)((v * width) + (u + uInc));
// Output indexes
*pIndex++ = v1;
*pIndex++ = v2;
*pIndex++ = v3;
// Next column
u += uInc;
} // while uCount
v += vInc;
u = 0;
} // while vCount
v = height - 1;
vInc = -vInc;
} // while iterations
} // unsafe
// unlock the buffer
idxBuffer.Unlock();
}
/// <summary>
///
/// </summary>
/// <param name="name"></param>
/// <param name="plane"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="curvature"></param>
/// <param name="xSegments"></param>
/// <param name="ySegments"></param>
/// <param name="normals"></param>
/// <param name="numberOfTexCoordSets"></param>
/// <param name="uTiles"></param>
/// <param name="vTiles"></param>
/// <param name="upVector"></param>
/// <param name="orientation"></param>
/// <param name="vertexBufferUsage"></param>
/// <param name="indexBufferUsage"></param>
/// <param name="vertexShadowBuffer"></param>
/// <param name="indexShadowBuffer"></param>
/// <returns></returns>
public Mesh CreateCurvedIllusionPlane(string name, Plane plane, float width, float height, float curvature, int xSegments, int ySegments, bool normals, int numberOfTexCoordSets, float uTiles, float vTiles, Vector3 upVector, Quaternion orientation, BufferUsage vertexBufferUsage, BufferUsage indexBufferUsage, bool vertexShadowBuffer, bool indexShadowBuffer)
{
Mesh mesh = CreateManual(name);
SubMesh subMesh = mesh.CreateSubMesh(name + "SubMesh");
// set up vertex data, use a single shared buffer
mesh.SharedVertexData = new VertexData();
VertexData vertexData = mesh.SharedVertexData;
// set up vertex declaration
VertexDeclaration vertexDeclaration = vertexData.vertexDeclaration;
int currentOffset = 0;
// always need positions
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Float3, VertexElementSemantic.Position);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Float3);
// optional normals
if (normals)
{
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Float3, VertexElementSemantic.Normal);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Float3);
}
for (ushort i = 0; i < numberOfTexCoordSets; i++)
{
// assumes 2d texture coordinates
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Float2, VertexElementSemantic.TexCoords, i);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Float2);
}
vertexData.vertexCount = (xSegments + 1) * (ySegments + 1);
// allocate vertex buffer
HardwareVertexBuffer vertexBuffer = HardwareBufferManager.Instance.CreateVertexBuffer(vertexDeclaration.GetVertexSize(0), vertexData.vertexCount, vertexBufferUsage, vertexShadowBuffer);
// set up the binding, one source only
VertexBufferBinding binding = vertexData.vertexBufferBinding;
binding.SetBinding(0, vertexBuffer);
// work out the transform required, default orientation of plane is normal along +z, distance 0
Matrix4 xlate, xform, rot;
Matrix3 rot3 = Matrix3.Identity;
xlate = rot = Matrix4.Identity;
// determine axes
Vector3 zAxis, yAxis, xAxis;
zAxis = plane.Normal;
zAxis.Normalize();
yAxis = upVector;
yAxis.Normalize();
xAxis = yAxis.Cross(zAxis);
if (xAxis.Length == 0)
{
throw new AxiomException("The up vector for a plane cannot be parallel to the planes normal.");
}
rot3.FromAxes(xAxis, yAxis, zAxis);
rot = rot3;
// set up standard xform from origin
xlate.Translation = plane.Normal * -plane.D;
// concatenate
xform = xlate * rot;
// generate vertex data, imagine a large sphere with the camera located near the top,
// the lower the curvature, the larger the sphere. use the angle from the viewer to the
// points on the plane
float cameraPosition; // camera position relative to the sphere center
// derive sphere radius (unused)
//float sphereDistance; // distance from the camera to the sphere along box vertex vector
float sphereRadius;
// actual values irrelevant, it's the relation between the sphere's radius and the camera's position which is important
float SPHERE_RADIUS = 100;
float CAMERA_DISTANCE = 5;
sphereRadius = SPHERE_RADIUS - curvature;
cameraPosition = sphereRadius - CAMERA_DISTANCE;
// lock the whole buffer
float xSpace = width / xSegments;
float ySpace = height / ySegments;
float halfWidth = width / 2;
float halfHeight = height / 2;
Vector3 vec = Vector3.Zero;
Vector3 norm = Vector3.Zero;
Vector3 min = Vector3.Zero;
Vector3 max = Vector3.Zero;
float maxSquaredLength = 0;
bool firstTime = true;
// generate vertex data
GenerateCurvedIllusionPlaneVertexData(vertexBuffer, ySegments, xSegments, xSpace, halfWidth, ySpace, halfHeight, xform, firstTime, normals, orientation, cameraPosition, sphereRadius, uTiles, vTiles, numberOfTexCoordSets, ref min, ref max, ref maxSquaredLength);
// generate face list
subMesh.useSharedVertices = true;
Tesselate2DMesh(subMesh, xSegments + 1, ySegments + 1, false, indexBufferUsage, indexShadowBuffer);
// generate bounds for the mesh
mesh.BoundingBox = new AxisAlignedBox(min, max);
mesh.BoundingSphereRadius = MathUtil.Sqrt(maxSquaredLength);
mesh.Load();
mesh.Touch();
return(mesh);
}
public Mesh CreateBoneMesh(string name)
{
Mesh mesh = CreateManual(name);
mesh.SkeletonName = name + ".skeleton";
SubMesh subMesh = mesh.CreateSubMesh("BoneSubMesh");
subMesh.useSharedVertices = true;
subMesh.MaterialName = "BaseWhite";
// short[] faces = { 0, 2, 3, 0, 3, 4, 0, 4, 5, 0, 5, 2, 1, 2, 5, 1, 5, 4, 1, 4, 3, 1, 3, 2 };
// short[] faces = { 0, 3, 2, 0, 4, 3, 0, 5, 4, 0, 2, 5, 1, 5, 2, 1, 4, 5, 1, 3, 4, 1, 2, 3 };
short[] faces = { 0, 2, 3, 0, 3, 4, 0, 4, 5, 0, 5, 2, 1, 2, 5, 1, 5, 4, 1, 4, 3, 1, 3, 2,
0, 3, 2, 0, 4, 3, 0, 5, 4, 0, 2, 5, 1, 5, 2, 1, 4, 5, 1, 3, 4, 1, 2, 3 };
int faceCount = faces.Length / 3; // faces per bone
int vertexCount = 6; // vertices per bone
// set up vertex data, use a single shared buffer
mesh.SharedVertexData = new VertexData();
VertexData vertexData = mesh.SharedVertexData;
// set up vertex declaration
VertexDeclaration vertexDeclaration = vertexData.vertexDeclaration;
int currentOffset = 0;
// always need positions
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Float3, VertexElementSemantic.Position);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Float3);
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Float3, VertexElementSemantic.Normal);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Float3);
int boneCount = mesh.Skeleton.BoneCount;
// I want 6 vertices per bone - exclude the root bone
vertexData.vertexCount = boneCount * vertexCount;
// allocate vertex buffer
HardwareVertexBuffer vertexBuffer = HardwareBufferManager.Instance.CreateVertexBuffer(vertexDeclaration.GetVertexSize(0), vertexData.vertexCount, BufferUsage.StaticWriteOnly);
// set up the binding, one source only
VertexBufferBinding binding = vertexData.vertexBufferBinding;
binding.SetBinding(0, vertexBuffer);
Vector3[] vertices = new Vector3[vertexData.vertexCount];
GetVertices(ref vertices, mesh.Skeleton.RootBone);
// Generate vertex data
unsafe {
// lock the vertex buffer
IntPtr data = vertexBuffer.Lock(BufferLocking.Discard);
float *pData = (float *)data.ToPointer();
foreach (Vector3 vec in vertices)
{
// assign to geometry
*pData++ = vec.x;
*pData++ = vec.y;
*pData++ = vec.z;
// fake normals
*pData++ = 0;
*pData++ = 1;
*pData++ = 0;
}
// unlock the buffer
vertexBuffer.Unlock();
} // unsafe
// Generate index data
HardwareIndexBuffer indexBuffer = HardwareBufferManager.Instance.CreateIndexBuffer(IndexType.Size16, faces.Length * boneCount, BufferUsage.StaticWriteOnly);
subMesh.indexData.indexBuffer = indexBuffer;
subMesh.indexData.indexCount = faces.Length * boneCount;
subMesh.indexData.indexStart = 0;
for (ushort boneIndex = 0; boneIndex < mesh.Skeleton.BoneCount; ++boneIndex)
{
Axiom.Animating.Bone bone = mesh.Skeleton.GetBone(boneIndex);
short[] tmpFaces = new short[faces.Length];
for (int tmp = 0; tmp < faces.Length; ++tmp)
{
tmpFaces[tmp] = (short)(faces[tmp] + vertexCount * bone.Handle);
}
indexBuffer.WriteData(faces.Length * bone.Handle * sizeof(short), tmpFaces.Length * sizeof(short), tmpFaces, true);
}
for (ushort boneIndex = 0; boneIndex < mesh.Skeleton.BoneCount; ++boneIndex)
{
Axiom.Animating.Bone bone = mesh.Skeleton.GetBone(boneIndex);
Axiom.Animating.Bone parentBone = bone;
if (bone.Parent != null)
{
parentBone = (Axiom.Animating.Bone)bone.Parent;
}
for (int vertexIndex = 0; vertexIndex < vertexCount; ++vertexIndex)
{
Axiom.Animating.VertexBoneAssignment vba = new Axiom.Animating.VertexBoneAssignment();
// associate the base of the joint display with the bone's parent,
// and the rest of the points with the bone.
vba.boneIndex = parentBone.Handle;
vba.weight = 1.0f;
vba.vertexIndex = vertexCount * bone.Handle + vertexIndex;
mesh.AddBoneAssignment(vba);
}
}
mesh.Load();
mesh.Touch();
return(mesh);
}
private static void GeneratePlaneVertexData(HardwareVertexBuffer vbuf, int ySegments, int xSegments, float xSpace, float halfWidth, float ySpace, float halfHeight, Matrix4 transform, bool firstTime, bool normals, Matrix4 rotation, int numTexCoordSets, float xTexCoord, float yTexCoord, SubMesh subMesh, ref Vector3 min, ref Vector3 max, ref float maxSquaredLength)
{
Vector3 vec;
unsafe {
// lock the vertex buffer
IntPtr data = vbuf.Lock(BufferLocking.Discard);
float *pData = (float *)data.ToPointer();
for (int y = 0; y <= ySegments; y++)
{
for (int x = 0; x <= xSegments; x++)
{
// centered on origin
vec.x = (x * xSpace) - halfWidth;
vec.y = (y * ySpace) - halfHeight;
vec.z = 0.0f;
vec = transform * vec;
*pData++ = vec.x;
*pData++ = vec.y;
*pData++ = vec.z;
// Build bounds as we go
if (firstTime)
{
min = vec;
max = vec;
maxSquaredLength = vec.LengthSquared;
firstTime = false;
}
else
{
min.Floor(vec);
max.Ceil(vec);
maxSquaredLength = MathUtil.Max(maxSquaredLength, vec.LengthSquared);
}
if (normals)
{
vec = Vector3.UnitZ;
vec = rotation * vec;
*pData++ = vec.x;
*pData++ = vec.y;
*pData++ = vec.z;
}
for (int i = 0; i < numTexCoordSets; i++)
{
*pData++ = x * xTexCoord;
*pData++ = 1 - (y * yTexCoord);
} // for texCoords
} // for x
} // for y
// unlock the buffer
vbuf.Unlock();
subMesh.useSharedVertices = true;
} // unsafe
}
/// <summary>
///
/// </summary>
/// <param name="name">Name of the plane mesh.</param>
/// <param name="plane">Plane to use for distance and orientation of the mesh.</param>
/// <param name="width">Width in world coordinates.</param>
/// <param name="height">Height in world coordinates.</param>
/// <param name="xSegments">Number of x segments for tesselation.</param>
/// <param name="ySegments">Number of y segments for tesselation.</param>
/// <param name="normals">If true, plane normals are created.</param>
/// <param name="numTexCoordSets">Number of 2d texture coord sets to use.</param>
/// <param name="uTile">Number of times the texture should be repeated in the u direction.</param>
/// <param name="vTile">Number of times the texture should be repeated in the v direction.</param>
/// <param name="upVec">The up direction of the plane.</param>
/// <returns></returns>
public Mesh CreatePlane(string name, Plane plane, float width, float height, int xSegments, int ySegments, bool normals, int numTexCoordSets, float uTile, float vTile, Vector3 upVec,
BufferUsage vertexBufferUsage, BufferUsage indexBufferUsage, bool vertexShadowBuffer, bool indexShadowBuffer)
{
Mesh mesh = CreateManual(name);
SubMesh subMesh = mesh.CreateSubMesh(name + "SubMesh");
mesh.SharedVertexData = new VertexData();
VertexData vertexData = mesh.SharedVertexData;
VertexDeclaration decl = vertexData.vertexDeclaration;
int currOffset = 0;
// add position data
decl.AddElement(0, currOffset, VertexElementType.Float3, VertexElementSemantic.Position);
currOffset += VertexElement.GetTypeSize(VertexElementType.Float3);
// normals are optional
if (normals)
{
decl.AddElement(0, currOffset, VertexElementType.Float3, VertexElementSemantic.Normal);
currOffset += VertexElement.GetTypeSize(VertexElementType.Float3);
}
// add texture coords
for (ushort i = 0; i < numTexCoordSets; i++)
{
decl.AddElement(0, currOffset, VertexElementType.Float2, VertexElementSemantic.TexCoords, i);
currOffset += VertexElement.GetTypeSize(VertexElementType.Float2);
}
vertexData.vertexCount = (xSegments + 1) * (ySegments + 1);
// create a new vertex buffer (based on current API)
HardwareVertexBuffer vbuf =
HardwareBufferManager.Instance.CreateVertexBuffer(decl.GetVertexSize(0), vertexData.vertexCount, vertexBufferUsage, vertexShadowBuffer);
// get a reference to the vertex buffer binding
VertexBufferBinding binding = vertexData.vertexBufferBinding;
// bind the first vertex buffer
binding.SetBinding(0, vbuf);
// transform the plane based on its plane def
Matrix4 translate = Matrix4.Identity;
Matrix4 transform = Matrix4.Zero;
Matrix4 rotation = Matrix4.Identity;
Matrix3 rot3x3 = Matrix3.Zero;
Vector3 xAxis, yAxis, zAxis;
zAxis = plane.Normal;
zAxis.Normalize();
yAxis = upVec;
yAxis.Normalize();
xAxis = yAxis.Cross(zAxis);
if (xAxis.Length == 0)
{
throw new AxiomException("The up vector for a plane cannot be parallel to the planes normal.");
}
rot3x3.FromAxes(xAxis, yAxis, zAxis);
rotation = rot3x3;
// set up transform from origin
translate.Translation = plane.Normal * -plane.D;
transform = translate * rotation;
float xSpace = width / xSegments;
float ySpace = height / ySegments;
float halfWidth = width / 2;
float halfHeight = height / 2;
float xTexCoord = (1.0f * uTile) / xSegments;
float yTexCoord = (1.0f * vTile) / ySegments;
Vector3 vec = Vector3.Zero;
Vector3 min = Vector3.Zero;
Vector3 max = Vector3.Zero;
float maxSquaredLength = 0;
bool firstTime = true;
// generate vertex data
GeneratePlaneVertexData(vbuf, ySegments, xSegments, xSpace, halfWidth, ySpace, halfHeight, transform, firstTime, normals, rotation, numTexCoordSets, xTexCoord, yTexCoord, subMesh, ref min, ref max, ref maxSquaredLength);
// generate face list
Tesselate2DMesh(subMesh, xSegments + 1, ySegments + 1, false, indexBufferUsage, indexShadowBuffer);
// generate bounds for the mesh
mesh.BoundingBox = new AxisAlignedBox(min, max);
mesh.BoundingSphereRadius = MathUtil.Sqrt(maxSquaredLength);
mesh.Load();
mesh.Touch();
return(mesh);
}
protected virtual void ReadSubMeshBoneAssignment( BinaryReader reader, SubMesh sub )
{
var assignment = new VertexBoneAssignment();
// read the data from the file
assignment.vertexIndex = ReadInt( reader );
assignment.boneIndex = ReadUShort( reader );
assignment.weight = ReadFloat( reader );
// add the assignment to the mesh
sub.AddBoneAssignment( assignment );
}
protected void WriteSubMeshOperation( BinaryWriter writer, SubMesh subMesh )
{
var start_offset = writer.Seek( 0, SeekOrigin.Current );
WriteChunk( writer, MeshChunkID.SubMeshOperation, 0 );
WriteUShort( writer, (ushort)subMesh.operationType );
var end_offset = writer.Seek( 0, SeekOrigin.Current );
writer.Seek( (int)start_offset, SeekOrigin.Begin );
WriteChunk( writer, MeshChunkID.SubMeshOperation, (int)( end_offset - start_offset ) );
writer.Seek( (int)end_offset, SeekOrigin.Begin );
}
protected void ReadFaces(XmlNode node, SubMesh subMesh, IndexType indexType)
{
uint faceCount = uint.Parse(node.Attributes["count"].Value);
int faceIndex = 0;
int[,] data = new int[faceCount, 3];
foreach (XmlNode childNode in node.ChildNodes) {
switch (childNode.Name) {
case "face":
ReadFace(childNode, data, faceIndex++);
break;
default:
DebugMessage(childNode);
break;
}
}
int count = data.GetLength(1);
subMesh.indexData.indexStart = 0;
subMesh.indexData.indexCount = data.GetLength(0) * data.GetLength(1);
HardwareIndexBuffer idxBuffer = null;
// create the index buffer
idxBuffer =
HardwareBufferManager.Instance.
CreateIndexBuffer(
indexType,
subMesh.indexData.indexCount,
mesh.IndexBufferUsage,
mesh.UseIndexShadowBuffer);
IntPtr indices = idxBuffer.Lock(BufferLocking.Discard);
if (indexType == IndexType.Size32) {
// read the ints into the buffer data
unsafe {
int* pInts = (int*)indices.ToPointer();
for (int i = 0; i < faceCount; ++i)
for (int j = 0; j < count; ++j) {
Debug.Assert(i * count + j < subMesh.indexData.indexCount, "Wrote off end of index buffer");
pInts[i * count + j] = data[i, j];
}
}
} else {
// read the shorts into the buffer data
unsafe {
short* pShorts = (short*)indices.ToPointer();
for (int i = 0; i < faceCount; ++i)
for (int j = 0; j < count; ++j) {
Debug.Assert(i * count + j < subMesh.indexData.indexCount, "Wrote off end of index buffer");
pShorts[i * count + j] = (short)data[i, j];
}
}
}
// unlock the buffer to commit
idxBuffer.Unlock();
// save the index buffer
subMesh.indexData.indexBuffer = idxBuffer;
}
protected void WriteSubMesh(BinaryWriter writer, SubMesh subMesh)
{
long start_offset = writer.Seek(0, SeekOrigin.Current);
WriteChunk(writer, MeshChunkID.SubMesh, 0);
WriteString(writer, subMesh.MaterialName);
WriteBool(writer, subMesh.useSharedVertices);
WriteUInt(writer, (uint)subMesh.indexData.indexCount);
bool indexes32bit = (subMesh.indexData.indexBuffer.Type == IndexType.Size32);
WriteBool(writer, indexes32bit);
IntPtr buf = subMesh.indexData.indexBuffer.Lock(BufferLocking.Discard);
try {
if (indexes32bit)
WriteInts(writer, subMesh.indexData.indexCount, buf);
else
WriteShorts(writer, subMesh.indexData.indexCount, buf);
} finally {
subMesh.indexData.indexBuffer.Unlock();
}
if (!subMesh.useSharedVertices)
WriteGeometry(writer, subMesh.vertexData);
WriteSubMeshTextureAliases(writer, subMesh);
WriteSubMeshOperation(writer, subMesh);
Dictionary<int, List<VertexBoneAssignment>> weights = subMesh.BoneAssignmentList;
foreach (int v in weights.Keys) {
List<VertexBoneAssignment> vbaList = weights[v];
foreach (VertexBoneAssignment vba in vbaList)
WriteSubMeshBoneAssignment(writer, vba);
}
// Write the texture alias (not currently supported)
long end_offset = writer.Seek(0, SeekOrigin.Current);
writer.Seek((int)start_offset, SeekOrigin.Begin);
WriteChunk(writer, MeshChunkID.SubMesh, (int)(end_offset - start_offset));
writer.Seek((int)end_offset, SeekOrigin.Begin);
}
protected void ReadGeometry(XmlNode node, SubMesh subMesh)
{
if (subMesh.useSharedVertices)
throw new Exception("I don't support shared vertices");
VertexData vertexData = new VertexData();
subMesh.vertexData = vertexData;
vertexData.vertexStart = 0;
vertexData.vertexCount = int.Parse(node.Attributes["vertexcount"].Value);
XmlVertexData xmlVertexData = new XmlVertexData(vertexData.vertexCount);
// Read in the various vertex buffers for this geometry, and
// consolidate them into one vertex buffer.
foreach (XmlNode childNode in node.ChildNodes) {
switch (childNode.Name) {
case "vertexbuffer":
ReadVertexBuffer(childNode, subMesh.vertexData, xmlVertexData);
break;
default:
DebugMessage(childNode);
break;
}
}
xmlVertexDataDict[subMesh] = xmlVertexData;
}
public WaterMesh( String meshName, float planeSize, int cmplx )
{ // najak R-F
// Assign Fields to the Initializer values
this.meshName = meshName;
this.size = planeSize;
this.cmplx = cmplx; // Number of Rows/Columns in the Water Grid representation
cmplxAdj = (float)System.Math.Pow( ( cmplx / 64f ), 1.4f ) * 2;
numFaces = 2 * (int)System.Math.Pow( cmplx, 2 ); // Each square is split into 2 triangles.
numVertices = (int)System.Math.Pow( ( cmplx + 1 ), 2 ); // Vertex grid is (Complexity+1) squared
// Allocate and initialize space for calculated Normals
vNorms = new Vector3[ cmplx + 1, cmplx + 1 ]; // vertex Normals for each grid point
fNorms = new Vector3[ cmplx, cmplx, 2 ]; // face Normals for each triangle
// Create mesh and submesh to represent the Water
mesh = (Mesh)MeshManager.Instance.CreateManual( meshName, ResourceGroupManager.DefaultResourceGroupName, null );
subMesh = mesh.CreateSubMesh();
subMesh.useSharedVertices = false;
// Construct metadata to describe the buffers associated with the water submesh
subMesh.vertexData = new VertexData();
subMesh.vertexData.vertexStart = 0;
subMesh.vertexData.vertexCount = numVertices;
// Define local variables to point to the VertexData Properties
VertexDeclaration vdecl = subMesh.vertexData.vertexDeclaration; // najak: seems like metadata
VertexBufferBinding vbind = subMesh.vertexData.vertexBufferBinding; // najak: pointer to actual buffer
//najak: Set metadata to describe the three vertex buffers that will be accessed.
vdecl.AddElement( 0, 0, VertexElementType.Float3, VertexElementSemantic.Position );
vdecl.AddElement( 1, 0, VertexElementType.Float3, VertexElementSemantic.Normal );
vdecl.AddElement( 2, 0, VertexElementType.Float2, VertexElementSemantic.TexCoords );
// Prepare buffer for positions - todo: first attempt, slow
// Create the Position Vertex Buffer and Bind it index 0 - Write Only
posVBuf = HwBufMgr.CreateVertexBuffer( vdecl.Clone(0), numVertices, BufferUsage.DynamicWriteOnly );
vbind.SetBinding( 0, posVBuf );
// Prepare buffer for normals - write only
// Create the Normals Buffer and Bind it to index 1 - Write only
normVBuf = HwBufMgr.CreateVertexBuffer( vdecl.Clone(1), numVertices, BufferUsage.DynamicWriteOnly );
vbind.SetBinding( 1, normVBuf );
// Prepare Texture Coordinates buffer (static, written only once)
// Creates a 2D buffer of 2D coordinates: (Complexity X Complexity), pairs.
// Each pair indicates the normalized coordinates of the texture to map to.
// (0,1.00), (0.02, 1.00), (0.04, 1.00), ... (1.00,1.00)
// (0,0.98), (0.02, 0.98), (0.04, 1.00), ... (1.00,0.98)
// ...
// (0,0.00), (0.02, 0.00), (0.04, 0.00), ... (1.00,0.00)
// This construct is simple and is used to calculate the Texture map.
// Todo: Write directly to the buffer, when Axiom supports this in safe manner
float[ , , ] tcBufDat = new float[ cmplx + 1, cmplx + 1, 2 ];
for ( int i = 0; i <= cmplx; i++ )
{
// 2D column iterator for texture map
for ( int j = 0; j <= cmplx; j++ )
{
// 2D row iterator for texture map
// Define the normalized(0..1) X/Y-coordinates for this element of the 2D grid
tcBufDat[ i, j, 0 ] = (float)i / cmplx;
tcBufDat[ i, j, 1 ] = 1.0f - ( (float)j / ( cmplx ) );
}
}
// Now Create the actual hardware buffer to contain the Texture Coordinate 2d map.
// and Bind it to buffer index 2
tcVBuf = HwBufMgr.CreateVertexBuffer( vdecl.Clone(2), numVertices, BufferUsage.StaticWriteOnly );
tcVBuf.WriteData( 0, tcVBuf.Size, tcBufDat, true );
vbind.SetBinding( 2, tcVBuf );
// Create a Graphics Buffer on non-shared vertex indices (3 points for each triangle).
// Since the water grid consist of [Complexity x Complexity] squares, each square is
// split into 2 right triangles 45-90-45. That is how the water mesh is constructed.
// Therefore the number of faces = 2 * Complexity * Complexity
ushort[ , , ] idxBuf = new ushort[ cmplx, cmplx, 6 ];
for ( int i = 0; i < cmplx; i++ )
{ // iterate the rows
for ( int j = 0; j < cmplx; j++ )
{ // iterate the columns
// Define 4 corners of each grid
ushort p0 = (ushort)( i * ( cmplx + 1 ) + j ); // top left point on square
ushort p1 = (ushort)( i * ( cmplx + 1 ) + j + 1 ); // top right
ushort p2 = (ushort)( ( i + 1 ) * ( cmplx + 1 ) + j ); // bottom left
ushort p3 = (ushort)( ( i + 1 ) * ( cmplx + 1 ) + j + 1 ); // bottom right
// Split Square Grid element into 2 adjacent triangles.
idxBuf[ i, j, 0 ] = p2;
idxBuf[ i, j, 1 ] = p1;
idxBuf[ i, j, 2 ] = p0; // top-left triangle
idxBuf[ i, j, 3 ] = p2;
idxBuf[ i, j, 4 ] = p3;
idxBuf[ i, j, 5 ] = p1; // bottom-right triangle
}
}
// Copy Index Buffer to the Hardware Index Buffer
HardwareIndexBuffer hdwrIdxBuf = HwBufMgr.CreateIndexBuffer( IndexType.Size16, 3 * numFaces, BufferUsage.StaticWriteOnly, true );
hdwrIdxBuf.WriteData( 0, numFaces * 3 * 2, idxBuf, true );
// Set index buffer for this submesh
subMesh.indexData.indexBuffer = hdwrIdxBuf;
subMesh.indexData.indexStart = 0;
subMesh.indexData.indexCount = 3 * numFaces;
//Prepare Vertex Position Buffers (Note: make 3, since each frame is function of previous two)
vBufs = new Vector3[ 3 ][ , ];
for ( int b = 0; b < 3; b++ )
{
vBufs[ b ] = new Vector3[ cmplx + 1, cmplx + 1 ];
for ( int y = 0; y <= cmplx; y++ )
{
for ( int x = 0; x <= cmplx; x++ )
{
vBufs[ b ][ y, x ].x = (float)( x ) / (float)( cmplx ) * (float)size;
vBufs[ b ][ y, x ].y = 0;
vBufs[ b ][ y, x ].z = (float)( y ) / (float)( cmplx ) * (float)size;
}
}
}
curBufNum = 0;
vBuf = vBufs[ curBufNum ];
posVBuf.WriteData( 0, posVBuf.Size, vBufs[ 0 ], true );
AxisAlignedBox meshBounds = new AxisAlignedBox( new Vector3( 0, 0, 0 ), new Vector3( size, 0, size ) );
mesh.BoundingBox = meshBounds; // mesh->_setBounds(meshBounds); // najak: can't find _setBounds()
mesh.Load();
mesh.Touch();
} // end WaterMesh Constructor
protected void ReadVertexBoneAssigment(XmlNode node, SubMesh subMesh)
{
VertexBoneAssignment assignment = new VertexBoneAssignment();
// read the data from the file
assignment.vertexIndex = int.Parse(node.Attributes["vertexindex"].Value);
assignment.boneIndex = ushort.Parse(node.Attributes["boneindex"].Value); ;
assignment.weight = float.Parse(node.Attributes["weight"].Value); ;
// add the assignment to the mesh
subMesh.AddBoneAssignment(assignment);
}
/// <summary>
/// Creates a new <see cref="SubMesh"/> and gives it a name.
/// </summary>
/// <param name="name">Name of the new <see cref="SubMesh"/>.</param>
/// <returns>A new <see cref="SubMesh"/> with this Mesh as its parent.</returns>
public SubMesh CreateSubMesh( string name )
{
var subMesh = new SubMesh();
subMesh.Name = name;
// set the parent of the subMesh to us
subMesh.Parent = this;
// add to the list of child meshes
this._subMeshList.Add( subMesh );
return subMesh;
}
protected XmlElement WriteBoneAssignments(SubMesh subMesh)
{
return WriteBoneAssignments(subMesh.BoneAssignmentList);
}
public void AddSubmeshData(SubMesh subMesh)
{
SubMeshData smd = null;
if (!subMesh.useSharedVertices)
smd = new SubMeshData(subMesh.VertexData);
else {
if (sharedSubMeshData == null)
sharedSubMeshData = new SubMeshData(subMesh.VertexData);
smd = sharedSubMeshData;
}
smd.AddSubmesh(subMesh);
subMeshDataMap[subMesh.Name] = smd;
}
protected XmlElement WriteFaces(SubMesh subMesh, IndexType indexType, bool isTriList)
{
XmlElement node = document.CreateElement("faces");
// Extract the hardware vertex buffer data into this array
int[,] data = new int[subMesh.NumFaces, 3];
HardwareIndexBuffer idxBuffer = subMesh.indexData.indexBuffer;
IntPtr indices = idxBuffer.Lock(BufferLocking.ReadOnly);
if (isTriList)
GetTriangleListIndices(ref data, indices, indexType, subMesh.indexData.indexCount);
else
GetTriangleStripOrFanIndices(ref data, indices, indexType, subMesh.indexData.indexCount);
// unlock the buffer
idxBuffer.Unlock();
int faceCount = data.GetLength(0);
XmlAttribute attr;
attr = document.CreateAttribute("count");
attr.Value = faceCount.ToString();
node.Attributes.Append(attr);
if (isTriList) {
for (int i = 0; i < faceCount; ++i) {
XmlElement childNode = WriteFace(ref data, i);
node.AppendChild(childNode);
}
} else {
// triangle strip or fan
if (faceCount != 0) {
XmlElement childNode = WriteFace(ref data, 0);
node.AppendChild(childNode);
}
for (int i = 1; i < faceCount; ++i) {
XmlElement childNode = WriteNextFace(ref data, i);
node.AppendChild(childNode);
}
}
return node;
}
protected XmlElement WriteGeometry(SubMesh subMesh)
{
XmlElement node = document.CreateElement("geometry");
XmlAttribute attr;
attr = document.CreateAttribute("vertexcount");
attr.Value = subMesh.vertexData.vertexCount.ToString();
node.Attributes.Append(attr);
return WriteGeometry(xmlVertexDataDict[subMesh], node);
}
protected XmlElement WriteSubmesh(SubMesh subMesh)
{
XmlElement node = document.CreateElement("submesh");
XmlAttribute attr;
attr = document.CreateAttribute("material");
attr.Value = subMesh.MaterialName;
node.Attributes.Append(attr);
attr = document.CreateAttribute("usesharedvertices");
attr.Value = (subMesh.useSharedVertices) ? "true" : "false";
node.Attributes.Append(attr);
VertexData vertexData =
(subMesh.useSharedVertices) ? mesh.SharedVertexData : subMesh.vertexData;
IndexType indexType = IndexType.Size16;
if (vertexData.vertexCount > short.MaxValue)
indexType = IndexType.Size32;
attr = document.CreateAttribute("use32bitindexes");
attr.Value = (indexType == IndexType.Size32) ? "true" : "false";
node.Attributes.Append(attr);
bool isTriList = true;
// TODO: Support things other than triangle lists
attr = document.CreateAttribute("operationtype");
RenderOperation op = new RenderOperation();
subMesh.GetRenderOperation(op);
switch (op.operationType) {
case OperationType.TriangleList:
attr.Value = "triangle_list";
break;
case OperationType.TriangleStrip:
attr.Value = "triangle_strip";
isTriList = false;
break;
case OperationType.TriangleFan:
attr.Value = "triangle_fan";
isTriList = false;
break;
default:
throw new AxiomException("Export of non triangle lists is not supported");
}
node.Attributes.Append(attr);
XmlElement childNode;
childNode = WriteFaces(subMesh, indexType, isTriList);
node.AppendChild(childNode);
if (!subMesh.useSharedVertices) {
childNode = WriteGeometry(subMesh);
node.AppendChild(childNode);
}
if (subMesh.BoneAssignmentList.Count > 0) {
childNode = WriteBoneAssignments(subMesh);
node.AppendChild(childNode);
}
return node;
}
private void _generatePlaneVertexData( HardwareVertexBuffer vbuf, int ySegments, int xSegments, float xSpace, float halfWidth, float ySpace, float halfHeight, Matrix4 transform, bool firstTime, bool normals, Matrix4 rotation, int numTexCoordSets, float xTexCoord, float yTexCoord, SubMesh subMesh, ref Vector3 min, ref Vector3 max, ref float maxSquaredLength )
{
Vector3 vec;
unsafe
{
// lock the vertex buffer
IntPtr data = vbuf.Lock( BufferLocking.Discard );
float* pData = (float*)data.ToPointer();
for ( int y = 0; y <= ySegments; y++ )
{
for ( int x = 0; x <= xSegments; x++ )
{
// centered on origin
vec.x = ( x * xSpace ) - halfWidth;
vec.y = ( y * ySpace ) - halfHeight;
vec.z = 0.0f;
vec = transform.TransformAffine( vec );
*pData++ = vec.x;
*pData++ = vec.y;
*pData++ = vec.z;
// Build bounds as we go
if ( firstTime )
{
min = vec;
max = vec;
maxSquaredLength = vec.LengthSquared;
firstTime = false;
}
else
{
min.Floor( vec );
max.Ceil( vec );
maxSquaredLength = Utility.Max( maxSquaredLength, vec.LengthSquared );
}
if ( normals )
{
vec = Vector3.UnitZ;
vec = rotation.TransformAffine( vec );
*pData++ = vec.x;
*pData++ = vec.y;
*pData++ = vec.z;
}
for ( int i = 0; i < numTexCoordSets; i++ )
{
*pData++ = x * xTexCoord;
*pData++ = 1 - ( y * yTexCoord );
} // for texCoords
} // for x
} // for y
// unlock the buffer
vbuf.Unlock();
subMesh.useSharedVertices = true;
} // unsafe
}
protected XmlElement WriteSubmeshName(SubMesh subMesh, int index)
{
XmlElement node = document.CreateElement("submeshname");
XmlAttribute attr;
attr = document.CreateAttribute("index");
attr.Value = index.ToString();
node.Attributes.Append(attr);
attr = document.CreateAttribute("name");
attr.Value = subMesh.Name;
node.Attributes.Append(attr);
return node;
}
protected virtual void ReadSubMeshOperation( BinaryReader reader, SubMesh sub )
{
sub.operationType = (OperationType)ReadShort( reader );
}
protected List<SubMeshLodGeometryLink> DetermineGeometry( SubMesh sm )
{
// First, determine if we've already seen this submesh before
List<SubMeshLodGeometryLink> lodList;
if ( this.subMeshGeometryLookup.TryGetValue( sm, out lodList ) )
{
return lodList;
}
// Otherwise, we have to create a new one
lodList = new List<SubMeshLodGeometryLink>();
this.subMeshGeometryLookup[ sm ] = lodList;
var numLods = sm.Parent.IsLodManual ? 1 : sm.Parent.LodLevelCount;
for ( var lod = 0; lod < numLods; ++lod )
{
var geomLink = new SubMeshLodGeometryLink();
lodList.Add( geomLink );
var lodIndexData = lod == 0 ? sm.indexData : sm.LodFaceList[ lod - 1 ];
// Can use the original mesh geometry?
if ( sm.useSharedVertices )
{
if ( sm.Parent.SubMeshCount == 1 )
{
// Ok, this is actually our own anyway
geomLink.vertexData = sm.Parent.SharedVertexData;
geomLink.indexData = lodIndexData;
}
else
{
// We have to split it
SplitGeometry( sm.Parent.SharedVertexData, lodIndexData, geomLink );
}
}
else
{
if ( lod == 0 )
{
// Ok, we can use the existing geometry; should be in full
// use by just this SubMesh
geomLink.vertexData = sm.VertexData;
geomLink.indexData = sm.IndexData;
}
else
{
// We have to split it
SplitGeometry( sm.VertexData, lodIndexData, geomLink );
}
}
Debug.Assert( geomLink.vertexData.vertexStart == 0,
"Cannot use vertexStart > 0 on indexed geometry due to " +
"rendersystem incompatibilities - see the docs!" );
}
return lodList;
}
protected void WriteSubMesh( BinaryWriter writer, SubMesh subMesh )
{
// cache header location
var start_offset = writer.Seek( 0, SeekOrigin.Current );
// Header
WriteChunk( writer, MeshChunkID.SubMesh, 0 );
// Name
WriteString( writer, subMesh.MaterialName );
// useSharedVertices
WriteBool( writer, subMesh.useSharedVertices );
// indexCount
WriteUInt( writer, (uint)subMesh.indexData.indexCount );
// indexes32bit
var indexes32bit = ( subMesh.indexData.indexBuffer.Type == IndexType.Size32 );
WriteBool( writer, indexes32bit );
var buf = subMesh.indexData.indexBuffer.Lock( BufferLocking.Discard );
try
{
if ( indexes32bit )
{
WriteInts( writer, subMesh.indexData.indexCount, buf );
}
else
{
WriteShorts( writer, subMesh.indexData.indexCount, buf );
}
}
finally
{
subMesh.indexData.indexBuffer.Unlock();
}
if ( !subMesh.useSharedVertices )
{
WriteGeometry( writer, subMesh.vertexData );
}
WriteSubMeshOperation( writer, subMesh );
var weights = subMesh.BoneAssignmentList;
foreach ( var v in weights.Keys )
{
var vbaList = weights[ v ];
foreach ( var vba in vbaList )
{
WriteSubMeshBoneAssignment( writer, vba );
}
}
// Write the texture alias (not currently supported)
var end_offset = writer.Seek( 0, SeekOrigin.Current );
writer.Seek( (int)start_offset, SeekOrigin.Begin );
WriteChunk( writer, MeshChunkID.SubMesh, (int)( end_offset - start_offset ) );
writer.Seek( (int)end_offset, SeekOrigin.Begin );
}
/// <summary>
/// Iterate over the the vertices, building up a bounding
/// box for the submesh.
/// </summary>
protected void CreateSubMeshBoundingBox(SubMesh subMesh)
{
AxisAlignedBox box = new AxisAlignedBox();
IndexData indexData = subMesh.indexData;
int count = indexData.indexCount;
IndexType type = indexData.indexBuffer.Type;
VertexData vertexData = null;
if (mesh.SharedVertexData != null)
vertexData = mesh.SharedVertexData;
else
vertexData = subMesh.vertexData;
VertexElement posElem = vertexData.vertexDeclaration.FindElementBySemantic(VertexElementSemantic.Position);
int offset = posElem.Offset;
Vector3 min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
Vector3 max = new Vector3(float.MinValue, float.MinValue, float.MinValue);
HardwareVertexBuffer posBuffer = vertexData.vertexBufferBinding.GetBuffer(posElem.Source);
int vertexSize = posBuffer.VertexSize;
try {
IntPtr indexPtr = indexData.indexBuffer.Lock(BufferLocking.ReadOnly);
try {
IntPtr posPtr = posBuffer.Lock(BufferLocking.ReadOnly);
unsafe {
byte* pBaseVertex = (byte*)posPtr.ToPointer();
short* p16Idx = null;
int* p32Idx = null;
if (type == IndexType.Size16)
p16Idx = (short*)indexPtr.ToPointer();
else
p32Idx = (int*)indexPtr.ToPointer();
for (int i=0; i<count; i++) {
int index = (type == IndexType.Size16 ? p16Idx[i] : p32Idx[i]);
byte* pVertex = pBaseVertex + (index * vertexSize);
float* pReal = (float*)(pVertex + offset);
float x = *pReal++;
if (x < min.x)
min.x = x;
if (x > max.x)
max.x = x;
float y = *pReal++;
if (y < min.y)
min.y = y;
if (y > max.y)
max.y = y;
float z = *pReal++;
if (z < min.z)
min.z = z;
if (z > max.z)
max.z = z;
}
}
} finally {
posBuffer.Unlock();
}
} finally {
indexData.indexBuffer.Unlock();
}
subMesh.BoundingBox = new AxisAlignedBox(min, max);
}
protected void WriteMeshLodGenerated( BinaryWriter writer, SubMesh subMesh, int usageIndex )
{
var start_offset = writer.Seek( 0, SeekOrigin.Current );
WriteChunk( writer, MeshChunkID.MeshLODGenerated, 0 );
var indexData = subMesh.lodFaceList[ usageIndex - 1 ];
var indexes32bit = ( indexData.indexBuffer.Type == IndexType.Size32 );
WriteInt( writer, indexData.indexCount );
WriteBool( writer, indexes32bit );
// lock the buffer
var data = indexData.indexBuffer.Lock( BufferLocking.ReadOnly );
if ( indexes32bit )
{
WriteInts( writer, indexData.indexCount, data );
}
else
{
WriteShorts( writer, indexData.indexCount, data );
}
indexData.indexBuffer.Unlock();
var end_offset = writer.Seek( 0, SeekOrigin.Current );
writer.Seek( (int)start_offset, SeekOrigin.Begin );
WriteChunk( writer, MeshChunkID.MeshLODGenerated, (int)( end_offset - start_offset ) );
writer.Seek( (int)end_offset, SeekOrigin.Begin );
}
private static MeshTriangle[] ExtractSubmeshTriangles( SubMesh subMesh )
{
int[] vertIdx = new int[ 3 ];
Vector3[] vertPos = new Vector3[ 3 ];
VertexElement posElem = subMesh.vertexData.vertexDeclaration.FindElementBySemantic( VertexElementSemantic.Position );
HardwareVertexBuffer posBuffer = posBuffer = subMesh.vertexData.vertexBufferBinding.GetBuffer( posElem.Source );
IntPtr indexPtr = subMesh.indexData.indexBuffer.Lock( BufferLocking.ReadOnly );
IntPtr posPtr = posBuffer.Lock( BufferLocking.ReadOnly );
int posOffset = posElem.Offset / sizeof( float );
int posStride = posBuffer.VertexSize / sizeof( float );
int numFaces = subMesh.indexData.indexCount / 3;
MeshTriangle[] triangles = new MeshTriangle[ numFaces ];
unsafe
{
int* pIdxInt32 = null;
short* pIdxShort = null;
float* pVPos = (float*) posPtr.ToPointer();
if( subMesh.indexData.indexBuffer.Type == IndexType.Size32 )
pIdxInt32 = (int*) indexPtr.ToPointer();
else
pIdxShort = (short*) indexPtr.ToPointer();
// loop through all faces to calculate the tangents
for( int n = 0; n < numFaces; n++ )
{
for( int i = 0; i < 3; i++ )
{
// get indices of vertices that form a polygon in the position buffer
if( subMesh.indexData.indexBuffer.Type == IndexType.Size32 )
vertIdx[ i ] = pIdxInt32[ 3 * n + i ];
else
vertIdx[ i ] = pIdxShort[ 3 * n + i ];
vertPos[ i ].x = pVPos[ vertIdx[ i ] * posStride + posOffset ];
vertPos[ i ].y = pVPos[ vertIdx[ i ] * posStride + posOffset + 1 ];
vertPos[ i ].z = pVPos[ vertIdx[ i ] * posStride + posOffset + 2 ];
}
triangles[ n ] = new MeshTriangle( vertPos[ 0 ], vertPos[ 1 ], vertPos[ 2 ] );
}
}
posBuffer.Unlock();
subMesh.indexData.indexBuffer.Unlock();
if( DoLog )
{
int count = triangles.Length;
Log( string.Format( " extracted {0} triangles", count ) );
for( int i = 0; i < count; i++ )
Log( string.Format( " {0}", triangles[ i ].ToString() ) );
}
return triangles;
}
