|
public SetBinding ( short index, |
||
| index | short | Index at which to bind the buffer. |
| buffer | Vertex buffer to bind. | |
| return | void | |
public Rectangle2D(bool includeTextureCoordinates)
{
vertexData = new VertexData();
vertexData.vertexStart = 0;
vertexData.vertexCount = 4;
VertexDeclaration decl = vertexData.vertexDeclaration;
VertexBufferBinding binding = vertexData.vertexBufferBinding;
decl.AddElement(POSITION, 0, VertexElementType.Float3, VertexElementSemantic.Position);
HardwareVertexBuffer buffer =
HardwareBufferManager.Instance.CreateVertexBuffer(
decl.GetVertexSize(POSITION),
vertexData.vertexCount,
BufferUsage.StaticWriteOnly);
binding.SetBinding(POSITION, buffer);
if (includeTextureCoordinates)
{
decl.AddElement(TEXCOORD, 0, VertexElementType.Float2, VertexElementSemantic.TexCoords);
buffer =
HardwareBufferManager.Instance.CreateVertexBuffer(
decl.GetVertexSize(TEXCOORD),
vertexData.vertexCount,
BufferUsage.StaticWriteOnly);
binding.SetBinding(TEXCOORD, buffer);
buffer.WriteData(0, buffer.Size, texCoords, true);
}
// TODO: Fix
material = MaterialManager.Instance.GetByName("BaseWhite");
material.Lighting = false;
}
protected void CreateCpuVertexData()
{
if ( this.mVertexDataRecord != null )
{
DestroyCpuVertexData();
// create vertex structure, not using GPU for now (these are CPU structures)
var dcl = new VertexDeclaration();
var bufbind = new VertexBufferBinding();
this.mVertexDataRecord.CpuVertexData = new VertexData( dcl, bufbind );
// Vertex declaration
// TODO: consider vertex compression
int offset = 0;
// POSITION
// float3(x, y, z)
offset += dcl.AddElement( POSITION_BUFFER, offset, VertexElementType.Float3, VertexElementSemantic.Position ).Size;
// UV0
// float2(u, v)
// TODO - only include this if needing fixed-function
offset +=
dcl.AddElement( POSITION_BUFFER, offset, VertexElementType.Float2, VertexElementSemantic.TexCoords, 0 ).Size;
// UV1 delta information
// float2(delta, deltaLODthreshold)
offset = 0;
offset += dcl.AddElement( DELTA_BUFFER, offset, VertexElementType.Float2, VertexElementSemantic.TexCoords, 1 ).Size;
// Calculate number of vertices
// Base geometry size * size
var baseNumVerts = (int)Utility.Sqr( this.mVertexDataRecord.Size );
var numVerts = baseNumVerts;
// Now add space for skirts
// Skirts will be rendered as copies of the edge vertices translated downwards
// Some people use one big fan with only 3 vertices at the bottom,
// but this requires creating them much bigger that necessary, meaning
// more unnecessary overdraw, so we'll use more vertices
// You need 2^levels + 1 rows of full resolution (max 129) vertex copies, plus
// the same number of columns. There are common vertices at intersections
var levels = this.mVertexDataRecord.TreeLevels;
this.mVertexDataRecord.NumSkirtRowsCols = (ushort)( System.Math.Pow( 2, levels ) + 1 );
this.mVertexDataRecord.SkirtRowColSkip =
(ushort)( ( this.mVertexDataRecord.Size - 1 )/( this.mVertexDataRecord.NumSkirtRowsCols - 1 ) );
numVerts += this.mVertexDataRecord.Size*this.mVertexDataRecord.NumSkirtRowsCols;
numVerts += this.mVertexDataRecord.Size*this.mVertexDataRecord.NumSkirtRowsCols;
//manually create CPU-side buffer
var posBuf = HardwareBufferManager.Instance.CreateVertexBuffer( dcl.Clone( POSITION_BUFFER ), numVerts,
BufferUsage.StaticWriteOnly, false );
var deltabuf = HardwareBufferManager.Instance.CreateVertexBuffer( dcl.Clone( DELTA_BUFFER ), numVerts,
BufferUsage.StaticWriteOnly, false );
this.mVertexDataRecord.CpuVertexData.vertexStart = 0;
this.mVertexDataRecord.CpuVertexData.vertexCount = numVerts;
var updateRect = new Rectangle( this.mOffsetX, this.mOffsetY, this.mBoundaryX, this.mBoundaryY );
UpdateVertexBuffer( posBuf, deltabuf, updateRect );
this.mVertexDataRecord.IsGpuVertexDataDirty = true;
bufbind.SetBinding( POSITION_BUFFER, posBuf );
bufbind.SetBinding( DELTA_BUFFER, deltabuf );
}
}
/// <summary>
/// Modifies the vertex data to be suitable for use for rendering shadow geometry.
/// </summary>
/// <remarks>
/// <para>
/// Preparing vertex data to generate a shadow volume involves firstly ensuring that the
/// vertex buffer containing the positions is a standalone vertex buffer,
/// with no other components in it. This method will therefore break apart any existing
/// vertex buffers if position is sharing a vertex buffer.
/// Secondly, it will double the size of this vertex buffer so that there are 2 copies of
/// the position data for the mesh. The first half is used for the original, and the second
/// half is used for the 'extruded' version. The vertex count used to render will remain
/// the same though, so as not to add any overhead to regular rendering of the object.
/// Both copies of the position are required in one buffer because shadow volumes stretch
/// from the original mesh to the extruded version.
/// </para>
/// <para>
/// It's important to appreciate that this method can fundamentally change the structure of your
/// vertex buffers, although in reality they will be new buffers. As it happens, if other
/// objects are using the original buffers then they will be unaffected because the reference
/// counting will keep them intact. However, if you have made any assumptions about the
/// structure of the vertex data in the buffers of this object, you may have to rethink them.
/// </para>
/// </remarks>
// TODO: Step through and test
public void PrepareForShadowVolume()
{
/* NOTE
* Sinbad would dearly, dearly love to just use a 4D position buffer in order to
* store the extra 'w' value I need to differentiate between extruded and
* non-extruded sections of the buffer, so that vertex programs could use that.
* Hey, it works fine for GL. However, D3D9 in it's infinite stupidity, does not
* support 4d position vertices in the fixed-function pipeline. If you use them,
* you just see nothing. Since we can't know whether the application is going to use
* fixed function or vertex programs, we have to stick to 3d position vertices and
* store the 'w' in a separate 1D texture coordinate buffer, which is only used
* when rendering the shadow.
*/
// Upfront, lets check whether we have vertex program capability
RenderSystem renderSystem = Root.Instance.RenderSystem;
bool useVertexPrograms = false;
if (renderSystem != null && renderSystem.Caps.CheckCap(Capabilities.VertexPrograms))
{
useVertexPrograms = true;
}
// Look for a position element
VertexElement posElem =
vertexDeclaration.FindElementBySemantic(VertexElementSemantic.Position);
if (posElem != null)
{
ushort posOldSource = posElem.Source;
HardwareVertexBuffer vbuf = vertexBufferBinding.GetBuffer(posOldSource);
bool wasSharedBuffer = false;
// Are there other elements in the buffer except for the position?
if (vbuf.VertexSize > posElem.Size)
{
// We need to create another buffer to contain the remaining elements
// Most drivers don't like gaps in the declaration, and in any case it's waste
wasSharedBuffer = true;
}
HardwareVertexBuffer newPosBuffer = null, newRemainderBuffer = null;
if (wasSharedBuffer)
{
newRemainderBuffer = HardwareBufferManager.Instance.CreateVertexBuffer(
vbuf.VertexSize - posElem.Size, vbuf.VertexCount, vbuf.Usage,
vbuf.HasShadowBuffer);
}
// Allocate new position buffer, will be FLOAT3 and 2x the size
int oldVertexCount = vbuf.VertexCount;
int newVertexCount = oldVertexCount * 2;
newPosBuffer = HardwareBufferManager.Instance.CreateVertexBuffer(
VertexElement.GetTypeSize(VertexElementType.Float3),
newVertexCount, vbuf.Usage, vbuf.HasShadowBuffer);
// Iterate over the old buffer, copying the appropriate elements and initializing the rest
IntPtr baseSrcPtr = vbuf.Lock(BufferLocking.ReadOnly);
// Point first destination pointer at the start of the new position buffer,
// the other one half way along
IntPtr destPtr = newPosBuffer.Lock(BufferLocking.Discard);
// oldVertexCount * 3 * 4, since we are dealing with byte offsets here
IntPtr dest2Ptr = new IntPtr(destPtr.ToInt32() + (oldVertexCount * 12));
int prePosVertexSize = 0;
int postPosVertexSize = 0;
int postPosVertexOffset = 0;
if (wasSharedBuffer)
{
// Precalculate any dimensions of vertex areas outside the position
prePosVertexSize = posElem.Offset;
postPosVertexOffset = prePosVertexSize + posElem.Size;
postPosVertexSize = vbuf.VertexSize - postPosVertexOffset;
// the 2 separate bits together should be the same size as the remainder buffer vertex
Debug.Assert(newRemainderBuffer.VertexSize == (prePosVertexSize + postPosVertexSize));
IntPtr baseDestRemPtr = newRemainderBuffer.Lock(BufferLocking.Discard);
int baseSrcOffset = 0;
int baseDestRemOffset = 0;
unsafe {
float *pDest = (float *)destPtr.ToPointer();
float *pDest2 = (float *)dest2Ptr.ToPointer();
int destCount = 0, dest2Count = 0;
// Iterate over the vertices
for (int v = 0; v < oldVertexCount; v++)
{
float *pSrc = (float *)((byte *)baseSrcPtr.ToPointer() + posElem.Offset + baseSrcOffset);
// Copy position, into both buffers
pDest[destCount++] = pDest2[dest2Count++] = pSrc[0];
pDest[destCount++] = pDest2[dest2Count++] = pSrc[1];
pDest[destCount++] = pDest2[dest2Count++] = pSrc[2];
// now deal with any other elements
// Basically we just memcpy the vertex excluding the position
if (prePosVertexSize > 0)
{
Memory.Copy(
baseSrcPtr, baseDestRemPtr,
baseSrcOffset, baseDestRemOffset,
prePosVertexSize);
}
if (postPosVertexSize > 0)
{
Memory.Copy(
baseSrcPtr, baseDestRemPtr,
baseSrcOffset + postPosVertexOffset,
baseDestRemOffset + prePosVertexSize,
postPosVertexSize);
}
// increment the pointer offsets
baseDestRemOffset += newRemainderBuffer.VertexSize;
baseSrcOffset += vbuf.VertexSize;
} // next vertex
} // unsafe
}
else
{
// copy the data directly
Memory.Copy(baseSrcPtr, destPtr, vbuf.Size);
Memory.Copy(baseSrcPtr, dest2Ptr, vbuf.Size);
}
vbuf.Unlock();
newPosBuffer.Unlock();
if (wasSharedBuffer)
{
newRemainderBuffer.Unlock();
}
// At this stage, he original vertex buffer is going to be destroyed
// So we should force the deallocation of any temporary copies
HardwareBufferManager.Instance.ForceReleaseBufferCopies(vbuf);
if (useVertexPrograms)
{
unsafe {
// Now it's time to set up the w buffer
hardwareShadowVolWBuffer =
HardwareBufferManager.Instance.CreateVertexBuffer(
sizeof(float),
newVertexCount,
BufferUsage.StaticWriteOnly,
false);
// Fill the first half with 1.0, second half with 0.0
IntPtr wPtr = hardwareShadowVolWBuffer.Lock(BufferLocking.Discard);
float *pDest = (float *)wPtr.ToPointer();
int destCount = 0;
for (int v = 0; v < oldVertexCount; v++)
{
pDest[destCount++] = 1.0f;
}
for (int v = 0; v < oldVertexCount; v++)
{
pDest[destCount++] = 0.0f;
}
} // unsafe
hardwareShadowVolWBuffer.Unlock();
} // if vertexPrograms
ushort newPosBufferSource = 0;
if (wasSharedBuffer)
{
// Get the a new buffer binding index
newPosBufferSource = vertexBufferBinding.NextIndex;
// Re-bind the old index to the remainder buffer
vertexBufferBinding.SetBinding(posOldSource, newRemainderBuffer);
}
else
{
// We can just re-use the same source idex for the new position buffer
newPosBufferSource = posOldSource;
}
// Bind the new position buffer
vertexBufferBinding.SetBinding(newPosBufferSource, newPosBuffer);
// Now, alter the vertex declaration to change the position source
// and the offsets of elements using the same buffer
for (int i = 0; i < vertexDeclaration.ElementCount; i++)
{
VertexElement element = vertexDeclaration.GetElement(i);
if (element.Semantic == VertexElementSemantic.Position)
{
// Modify position to point at new position buffer
vertexDeclaration.ModifyElement(
i,
newPosBufferSource, // new source buffer
0, // no offset now
VertexElementType.Float3,
VertexElementSemantic.Position);
}
else if (wasSharedBuffer &&
element.Source == posOldSource &&
element.Offset > prePosVertexSize)
{
// This element came after position, remove the position's
// size
vertexDeclaration.ModifyElement(
i,
posOldSource, // same old source
element.Offset - posElem.Size, // less offset now
element.Type,
element.Semantic,
element.Index);
}
}
} // if posElem != null
}
private void CreateBuffers(ushort[] indices, short[] vertices)
{
var numIndices = indices.Length;
var numVertices = vertices.Length;
_vertexDeclaration = HardwareBufferManager.Instance.CreateVertexDeclaration();
_vertexDeclaration.AddElement(0, 0, VertexElementType.Short2, VertexElementSemantic.Position);
_ib = HardwareBufferManager.Instance.CreateIndexBuffer(IndexType.Size16, numIndices, BufferUsage.WriteOnly);
_vb = HardwareBufferManager.Instance.CreateVertexBuffer(_vertexDeclaration, numVertices, BufferUsage.WriteOnly, false);
_ib.WriteData(0, numIndices * sizeof(ushort), indices, true);
_vb.WriteData(0, numVertices * sizeof(ushort), vertices, true);
var binding = new VertexBufferBinding();
binding.SetBinding(0, _vb);
VertexData = new VertexData();
VertexData.vertexDeclaration = _vertexDeclaration;
VertexData.vertexBufferBinding = binding;
VertexData.vertexCount = numVertices;
VertexData.vertexStart = 0;
IndexData = new IndexData();
IndexData.indexBuffer = _ib;
IndexData.indexCount = numIndices;
IndexData.indexStart = 0;
}
protected void SetPointsImpl(List <Vector3> points, List <ColorEx> colors, List <List <VertexBoneAssignment> > boneAssignments)
{
if (colors != null && points.Count != colors.Count)
{
throw new Exception("Invalid parameters to SetPoints. Point list length does not match colors list length");
}
Vector3 min = Vector3.Zero;
Vector3 max = Vector3.Zero;
// set up vertex data
vertexData = new VertexData();
// 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);
int colorOffset = currentOffset / sizeof(float);
if (colors != null)
{
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Color, VertexElementSemantic.Diffuse);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Color);
}
int boneIndexOffset = currentOffset / sizeof(float);
if (boneAssignments != null)
{
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.UByte4, VertexElementSemantic.BlendIndices);
currentOffset += VertexElement.GetTypeSize(VertexElementType.UByte4);
}
int boneWeightOffset = currentOffset / sizeof(float);
if (boneAssignments != null)
{
vertexDeclaration.AddElement(0, currentOffset, VertexElementType.Float4, VertexElementSemantic.BlendWeights);
currentOffset += VertexElement.GetTypeSize(VertexElementType.Float4);
}
int stride = currentOffset / sizeof(float);
vertexData.vertexCount = points.Count;
// 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);
// Generate vertex data
unsafe {
// lock the vertex buffer
IntPtr data = vertexBuffer.Lock(BufferLocking.Discard);
byte * pData = (byte *)data.ToPointer();
float *pFloat = (float *)pData;
uint * pInt = (uint *)pData;
for (int i = 0; i < points.Count; ++i)
{
Vector3 vec = points[i];
// assign to geometry
pFloat[stride * i] = vec.x;
pFloat[stride * i + 1] = vec.y;
pFloat[stride * i + 2] = vec.z;
if (colors != null)
{
// assign to diffuse
pInt[stride * i + colorOffset] = Root.Instance.RenderSystem.ConvertColor(colors[i]);
}
if (boneAssignments != null)
{
for (int j = 0; j < 4; ++j)
{
pData[4 * (stride * i + boneIndexOffset) + j] = (byte)(boneAssignments[i][j].boneIndex);
pFloat[stride * i + boneWeightOffset + j] = boneAssignments[i][j].weight;
}
}
}
// unlock the buffer
vertexBuffer.Unlock();
} // unsafe
for (int i = 0; i < points.Count; ++i)
{
Vector3 vec = points[i];
// Also update the bounding sphere radius
float len = vec.Length;
if (len > boundingSphereRadius)
{
boundingSphereRadius = len;
}
// Also update the bounding box
if (vec.x < min.x)
{
min.x = vec.x;
}
if (vec.y < min.y)
{
min.y = vec.y;
}
if (vec.z < min.z)
{
min.z = vec.z;
}
if (vec.x > max.x)
{
max.x = vec.x;
}
if (vec.y > max.y)
{
max.y = vec.y;
}
if (vec.z > max.z)
{
max.z = vec.z;
}
}
// Set the SimpleRenderable bounding box
box = new AxisAlignedBox(min, max);
}