360 lines
12 KiB
C++
360 lines
12 KiB
C++
/*
|
|
Bullet Continuous Collision Detection and Physics Library
|
|
Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
|
|
|
|
This software is provided 'as-is', without any express or implied warranty.
|
|
In no event will the authors be held liable for any damages arising from the use of this software.
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it freely,
|
|
subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
#include "btOptimizedBvh.h"
|
|
#include "btStridingMeshInterface.h"
|
|
#include "LinearMath/btAabbUtil2.h"
|
|
#include "LinearMath/btIDebugDraw.h"
|
|
|
|
btOptimizedBvh::btOptimizedBvh()
|
|
{
|
|
}
|
|
|
|
btOptimizedBvh::~btOptimizedBvh()
|
|
{
|
|
}
|
|
|
|
void btOptimizedBvh::build(btStridingMeshInterface* triangles, bool useQuantizedAabbCompression, const btVector3& bvhAabbMin, const btVector3& bvhAabbMax)
|
|
{
|
|
m_useQuantization = useQuantizedAabbCompression;
|
|
|
|
// NodeArray triangleNodes;
|
|
|
|
struct NodeTriangleCallback : public btInternalTriangleIndexCallback
|
|
{
|
|
NodeArray& m_triangleNodes;
|
|
|
|
NodeTriangleCallback& operator=(NodeTriangleCallback& other)
|
|
{
|
|
m_triangleNodes.copyFromArray(other.m_triangleNodes);
|
|
return *this;
|
|
}
|
|
|
|
NodeTriangleCallback(NodeArray& triangleNodes)
|
|
: m_triangleNodes(triangleNodes)
|
|
{
|
|
}
|
|
|
|
virtual void internalProcessTriangleIndex(btVector3* triangle, int partId, int triangleIndex)
|
|
{
|
|
btOptimizedBvhNode node;
|
|
btVector3 aabbMin, aabbMax;
|
|
aabbMin.setValue(btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT));
|
|
aabbMax.setValue(btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT));
|
|
aabbMin.setMin(triangle[0]);
|
|
aabbMax.setMax(triangle[0]);
|
|
aabbMin.setMin(triangle[1]);
|
|
aabbMax.setMax(triangle[1]);
|
|
aabbMin.setMin(triangle[2]);
|
|
aabbMax.setMax(triangle[2]);
|
|
|
|
//with quantization?
|
|
node.m_aabbMinOrg = aabbMin;
|
|
node.m_aabbMaxOrg = aabbMax;
|
|
|
|
node.m_escapeIndex = -1;
|
|
|
|
//for child nodes
|
|
node.m_subPart = partId;
|
|
node.m_triangleIndex = triangleIndex;
|
|
m_triangleNodes.push_back(node);
|
|
}
|
|
};
|
|
struct QuantizedNodeTriangleCallback : public btInternalTriangleIndexCallback
|
|
{
|
|
QuantizedNodeArray& m_triangleNodes;
|
|
const btQuantizedBvh* m_optimizedTree; // for quantization
|
|
|
|
QuantizedNodeTriangleCallback& operator=(QuantizedNodeTriangleCallback& other)
|
|
{
|
|
m_triangleNodes.copyFromArray(other.m_triangleNodes);
|
|
m_optimizedTree = other.m_optimizedTree;
|
|
return *this;
|
|
}
|
|
|
|
QuantizedNodeTriangleCallback(QuantizedNodeArray& triangleNodes, const btQuantizedBvh* tree)
|
|
: m_triangleNodes(triangleNodes), m_optimizedTree(tree)
|
|
{
|
|
}
|
|
|
|
virtual void internalProcessTriangleIndex(btVector3* triangle, int partId, int triangleIndex)
|
|
{
|
|
// The partId and triangle index must fit in the same (positive) integer
|
|
btAssert(partId < (1 << MAX_NUM_PARTS_IN_BITS));
|
|
btAssert(triangleIndex < (1 << (31 - MAX_NUM_PARTS_IN_BITS)));
|
|
//negative indices are reserved for escapeIndex
|
|
btAssert(triangleIndex >= 0);
|
|
|
|
btQuantizedBvhNode node;
|
|
btVector3 aabbMin, aabbMax;
|
|
aabbMin.setValue(btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT));
|
|
aabbMax.setValue(btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT));
|
|
aabbMin.setMin(triangle[0]);
|
|
aabbMax.setMax(triangle[0]);
|
|
aabbMin.setMin(triangle[1]);
|
|
aabbMax.setMax(triangle[1]);
|
|
aabbMin.setMin(triangle[2]);
|
|
aabbMax.setMax(triangle[2]);
|
|
|
|
//PCK: add these checks for zero dimensions of aabb
|
|
const btScalar MIN_AABB_DIMENSION = btScalar(0.002);
|
|
const btScalar MIN_AABB_HALF_DIMENSION = btScalar(0.001);
|
|
if (aabbMax.x() - aabbMin.x() < MIN_AABB_DIMENSION)
|
|
{
|
|
aabbMax.setX(aabbMax.x() + MIN_AABB_HALF_DIMENSION);
|
|
aabbMin.setX(aabbMin.x() - MIN_AABB_HALF_DIMENSION);
|
|
}
|
|
if (aabbMax.y() - aabbMin.y() < MIN_AABB_DIMENSION)
|
|
{
|
|
aabbMax.setY(aabbMax.y() + MIN_AABB_HALF_DIMENSION);
|
|
aabbMin.setY(aabbMin.y() - MIN_AABB_HALF_DIMENSION);
|
|
}
|
|
if (aabbMax.z() - aabbMin.z() < MIN_AABB_DIMENSION)
|
|
{
|
|
aabbMax.setZ(aabbMax.z() + MIN_AABB_HALF_DIMENSION);
|
|
aabbMin.setZ(aabbMin.z() - MIN_AABB_HALF_DIMENSION);
|
|
}
|
|
|
|
m_optimizedTree->quantize(&node.m_quantizedAabbMin[0], aabbMin, 0);
|
|
m_optimizedTree->quantize(&node.m_quantizedAabbMax[0], aabbMax, 1);
|
|
|
|
node.m_escapeIndexOrTriangleIndex = (partId << (31 - MAX_NUM_PARTS_IN_BITS)) | triangleIndex;
|
|
|
|
m_triangleNodes.push_back(node);
|
|
}
|
|
};
|
|
|
|
int numLeafNodes = 0;
|
|
|
|
if (m_useQuantization)
|
|
{
|
|
//initialize quantization values
|
|
setQuantizationValues(bvhAabbMin, bvhAabbMax);
|
|
|
|
QuantizedNodeTriangleCallback callback(m_quantizedLeafNodes, this);
|
|
|
|
triangles->InternalProcessAllTriangles(&callback, m_bvhAabbMin, m_bvhAabbMax);
|
|
|
|
//now we have an array of leafnodes in m_leafNodes
|
|
numLeafNodes = m_quantizedLeafNodes.size();
|
|
|
|
m_quantizedContiguousNodes.resize(2 * numLeafNodes);
|
|
}
|
|
else
|
|
{
|
|
NodeTriangleCallback callback(m_leafNodes);
|
|
|
|
btVector3 aabbMin(btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT));
|
|
btVector3 aabbMax(btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT));
|
|
|
|
triangles->InternalProcessAllTriangles(&callback, aabbMin, aabbMax);
|
|
|
|
//now we have an array of leafnodes in m_leafNodes
|
|
numLeafNodes = m_leafNodes.size();
|
|
|
|
m_contiguousNodes.resize(2 * numLeafNodes);
|
|
}
|
|
|
|
m_curNodeIndex = 0;
|
|
|
|
buildTree(0, numLeafNodes);
|
|
|
|
///if the entire tree is small then subtree size, we need to create a header info for the tree
|
|
if (m_useQuantization && !m_SubtreeHeaders.size())
|
|
{
|
|
btBvhSubtreeInfo& subtree = m_SubtreeHeaders.expand();
|
|
subtree.setAabbFromQuantizeNode(m_quantizedContiguousNodes[0]);
|
|
subtree.m_rootNodeIndex = 0;
|
|
subtree.m_subtreeSize = m_quantizedContiguousNodes[0].isLeafNode() ? 1 : m_quantizedContiguousNodes[0].getEscapeIndex();
|
|
}
|
|
|
|
//PCK: update the copy of the size
|
|
m_subtreeHeaderCount = m_SubtreeHeaders.size();
|
|
|
|
//PCK: clear m_quantizedLeafNodes and m_leafNodes, they are temporary
|
|
m_quantizedLeafNodes.clear();
|
|
m_leafNodes.clear();
|
|
}
|
|
|
|
void btOptimizedBvh::refit(btStridingMeshInterface* meshInterface, const btVector3& aabbMin, const btVector3& aabbMax)
|
|
{
|
|
if (m_useQuantization)
|
|
{
|
|
setQuantizationValues(aabbMin, aabbMax);
|
|
|
|
updateBvhNodes(meshInterface, 0, m_curNodeIndex, 0);
|
|
|
|
///now update all subtree headers
|
|
|
|
int i;
|
|
for (i = 0; i < m_SubtreeHeaders.size(); i++)
|
|
{
|
|
btBvhSubtreeInfo& subtree = m_SubtreeHeaders[i];
|
|
subtree.setAabbFromQuantizeNode(m_quantizedContiguousNodes[subtree.m_rootNodeIndex]);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
}
|
|
}
|
|
|
|
void btOptimizedBvh::refitPartial(btStridingMeshInterface* meshInterface, const btVector3& aabbMin, const btVector3& aabbMax)
|
|
{
|
|
//incrementally initialize quantization values
|
|
btAssert(m_useQuantization);
|
|
|
|
btAssert(aabbMin.getX() > m_bvhAabbMin.getX());
|
|
btAssert(aabbMin.getY() > m_bvhAabbMin.getY());
|
|
btAssert(aabbMin.getZ() > m_bvhAabbMin.getZ());
|
|
|
|
btAssert(aabbMax.getX() < m_bvhAabbMax.getX());
|
|
btAssert(aabbMax.getY() < m_bvhAabbMax.getY());
|
|
btAssert(aabbMax.getZ() < m_bvhAabbMax.getZ());
|
|
|
|
///we should update all quantization values, using updateBvhNodes(meshInterface);
|
|
///but we only update chunks that overlap the given aabb
|
|
|
|
unsigned short quantizedQueryAabbMin[3];
|
|
unsigned short quantizedQueryAabbMax[3];
|
|
|
|
quantize(&quantizedQueryAabbMin[0], aabbMin, 0);
|
|
quantize(&quantizedQueryAabbMax[0], aabbMax, 1);
|
|
|
|
int i;
|
|
for (i = 0; i < this->m_SubtreeHeaders.size(); i++)
|
|
{
|
|
btBvhSubtreeInfo& subtree = m_SubtreeHeaders[i];
|
|
|
|
//PCK: unsigned instead of bool
|
|
unsigned overlap = testQuantizedAabbAgainstQuantizedAabb(quantizedQueryAabbMin, quantizedQueryAabbMax, subtree.m_quantizedAabbMin, subtree.m_quantizedAabbMax);
|
|
if (overlap != 0)
|
|
{
|
|
updateBvhNodes(meshInterface, subtree.m_rootNodeIndex, subtree.m_rootNodeIndex + subtree.m_subtreeSize, i);
|
|
|
|
subtree.setAabbFromQuantizeNode(m_quantizedContiguousNodes[subtree.m_rootNodeIndex]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void btOptimizedBvh::updateBvhNodes(btStridingMeshInterface* meshInterface, int firstNode, int endNode, int index)
|
|
{
|
|
(void)index;
|
|
|
|
btAssert(m_useQuantization);
|
|
|
|
int curNodeSubPart = -1;
|
|
|
|
//get access info to trianglemesh data
|
|
const unsigned char* vertexbase = 0;
|
|
int numverts = 0;
|
|
PHY_ScalarType type = PHY_INTEGER;
|
|
int stride = 0;
|
|
const unsigned char* indexbase = 0;
|
|
int indexstride = 0;
|
|
int numfaces = 0;
|
|
PHY_ScalarType indicestype = PHY_INTEGER;
|
|
|
|
btVector3 triangleVerts[3];
|
|
btVector3 aabbMin, aabbMax;
|
|
const btVector3& meshScaling = meshInterface->getScaling();
|
|
|
|
int i;
|
|
for (i = endNode - 1; i >= firstNode; i--)
|
|
{
|
|
btQuantizedBvhNode& curNode = m_quantizedContiguousNodes[i];
|
|
if (curNode.isLeafNode())
|
|
{
|
|
//recalc aabb from triangle data
|
|
int nodeSubPart = curNode.getPartId();
|
|
int nodeTriangleIndex = curNode.getTriangleIndex();
|
|
if (nodeSubPart != curNodeSubPart)
|
|
{
|
|
if (curNodeSubPart >= 0)
|
|
meshInterface->unLockReadOnlyVertexBase(curNodeSubPart);
|
|
meshInterface->getLockedReadOnlyVertexIndexBase(&vertexbase, numverts, type, stride, &indexbase, indexstride, numfaces, indicestype, nodeSubPart);
|
|
|
|
curNodeSubPart = nodeSubPart;
|
|
btAssert(indicestype == PHY_INTEGER || indicestype == PHY_SHORT);
|
|
}
|
|
//triangles->getLockedReadOnlyVertexIndexBase(vertexBase,numVerts,
|
|
|
|
unsigned int* gfxbase = (unsigned int*)(indexbase + nodeTriangleIndex * indexstride);
|
|
|
|
for (int j = 2; j >= 0; j--)
|
|
{
|
|
int graphicsindex = indicestype == PHY_SHORT ? ((unsigned short*)gfxbase)[j] : gfxbase[j];
|
|
if (type == PHY_FLOAT)
|
|
{
|
|
float* graphicsbase = (float*)(vertexbase + graphicsindex * stride);
|
|
triangleVerts[j] = btVector3(
|
|
graphicsbase[0] * meshScaling.getX(),
|
|
graphicsbase[1] * meshScaling.getY(),
|
|
graphicsbase[2] * meshScaling.getZ());
|
|
}
|
|
else
|
|
{
|
|
double* graphicsbase = (double*)(vertexbase + graphicsindex * stride);
|
|
triangleVerts[j] = btVector3(btScalar(graphicsbase[0] * meshScaling.getX()), btScalar(graphicsbase[1] * meshScaling.getY()), btScalar(graphicsbase[2] * meshScaling.getZ()));
|
|
}
|
|
}
|
|
|
|
aabbMin.setValue(btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT), btScalar(BT_LARGE_FLOAT));
|
|
aabbMax.setValue(btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT), btScalar(-BT_LARGE_FLOAT));
|
|
aabbMin.setMin(triangleVerts[0]);
|
|
aabbMax.setMax(triangleVerts[0]);
|
|
aabbMin.setMin(triangleVerts[1]);
|
|
aabbMax.setMax(triangleVerts[1]);
|
|
aabbMin.setMin(triangleVerts[2]);
|
|
aabbMax.setMax(triangleVerts[2]);
|
|
|
|
quantize(&curNode.m_quantizedAabbMin[0], aabbMin, 0);
|
|
quantize(&curNode.m_quantizedAabbMax[0], aabbMax, 1);
|
|
}
|
|
else
|
|
{
|
|
//combine aabb from both children
|
|
|
|
btQuantizedBvhNode* leftChildNode = &m_quantizedContiguousNodes[i + 1];
|
|
|
|
btQuantizedBvhNode* rightChildNode = leftChildNode->isLeafNode() ? &m_quantizedContiguousNodes[i + 2] : &m_quantizedContiguousNodes[i + 1 + leftChildNode->getEscapeIndex()];
|
|
|
|
{
|
|
for (int i = 0; i < 3; i++)
|
|
{
|
|
curNode.m_quantizedAabbMin[i] = leftChildNode->m_quantizedAabbMin[i];
|
|
if (curNode.m_quantizedAabbMin[i] > rightChildNode->m_quantizedAabbMin[i])
|
|
curNode.m_quantizedAabbMin[i] = rightChildNode->m_quantizedAabbMin[i];
|
|
|
|
curNode.m_quantizedAabbMax[i] = leftChildNode->m_quantizedAabbMax[i];
|
|
if (curNode.m_quantizedAabbMax[i] < rightChildNode->m_quantizedAabbMax[i])
|
|
curNode.m_quantizedAabbMax[i] = rightChildNode->m_quantizedAabbMax[i];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (curNodeSubPart >= 0)
|
|
meshInterface->unLockReadOnlyVertexBase(curNodeSubPart);
|
|
}
|
|
|
|
///deSerializeInPlace loads and initializes a BVH from a buffer in memory 'in place'
|
|
btOptimizedBvh* btOptimizedBvh::deSerializeInPlace(void* i_alignedDataBuffer, unsigned int i_dataBufferSize, bool i_swapEndian)
|
|
{
|
|
btQuantizedBvh* bvh = btQuantizedBvh::deSerializeInPlace(i_alignedDataBuffer, i_dataBufferSize, i_swapEndian);
|
|
|
|
//we don't add additional data so just do a static upcast
|
|
return static_cast<btOptimizedBvh*>(bvh);
|
|
}
|