mirror of
https://github.com/godotengine/godot.git
synced 2024-12-21 10:25:24 +08:00
e12c89e8c9
Document version and how to extract sources in thirdparty/README.md. Drop unnecessary CMake and Premake files. Simplify SCsub, drop unused one.
839 lines
25 KiB
C++
839 lines
25 KiB
C++
#include "btInternalEdgeUtility.h"
|
|
|
|
#include "BulletCollision/CollisionShapes/btBvhTriangleMeshShape.h"
|
|
#include "BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.h"
|
|
#include "BulletCollision/CollisionShapes/btTriangleShape.h"
|
|
#include "BulletCollision/CollisionDispatch/btCollisionObject.h"
|
|
#include "BulletCollision/NarrowPhaseCollision/btManifoldPoint.h"
|
|
#include "LinearMath/btIDebugDraw.h"
|
|
#include "BulletCollision/CollisionDispatch/btCollisionObjectWrapper.h"
|
|
|
|
//#define DEBUG_INTERNAL_EDGE
|
|
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
#include <stdio.h>
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
|
|
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
static btIDebugDraw* gDebugDrawer = 0;
|
|
|
|
void btSetDebugDrawer(btIDebugDraw* debugDrawer)
|
|
{
|
|
gDebugDrawer = debugDrawer;
|
|
}
|
|
|
|
static void btDebugDrawLine(const btVector3& from,const btVector3& to, const btVector3& color)
|
|
{
|
|
if (gDebugDrawer)
|
|
gDebugDrawer->drawLine(from,to,color);
|
|
}
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
|
|
static int btGetHash(int partId, int triangleIndex)
|
|
{
|
|
int hash = (partId<<(31-MAX_NUM_PARTS_IN_BITS)) | triangleIndex;
|
|
return hash;
|
|
}
|
|
|
|
|
|
|
|
static btScalar btGetAngle(const btVector3& edgeA, const btVector3& normalA,const btVector3& normalB)
|
|
{
|
|
const btVector3 refAxis0 = edgeA;
|
|
const btVector3 refAxis1 = normalA;
|
|
const btVector3 swingAxis = normalB;
|
|
btScalar angle = btAtan2(swingAxis.dot(refAxis0), swingAxis.dot(refAxis1));
|
|
return angle;
|
|
}
|
|
|
|
|
|
struct btConnectivityProcessor : public btTriangleCallback
|
|
{
|
|
int m_partIdA;
|
|
int m_triangleIndexA;
|
|
btVector3* m_triangleVerticesA;
|
|
btTriangleInfoMap* m_triangleInfoMap;
|
|
|
|
|
|
virtual void processTriangle(btVector3* triangle, int partId, int triangleIndex)
|
|
{
|
|
//skip self-collisions
|
|
if ((m_partIdA == partId) && (m_triangleIndexA == triangleIndex))
|
|
return;
|
|
|
|
//skip duplicates (disabled for now)
|
|
//if ((m_partIdA <= partId) && (m_triangleIndexA <= triangleIndex))
|
|
// return;
|
|
|
|
//search for shared vertices and edges
|
|
int numshared = 0;
|
|
int sharedVertsA[3]={-1,-1,-1};
|
|
int sharedVertsB[3]={-1,-1,-1};
|
|
|
|
///skip degenerate triangles
|
|
btScalar crossBSqr = ((triangle[1]-triangle[0]).cross(triangle[2]-triangle[0])).length2();
|
|
if (crossBSqr < m_triangleInfoMap->m_equalVertexThreshold)
|
|
return;
|
|
|
|
|
|
btScalar crossASqr = ((m_triangleVerticesA[1]-m_triangleVerticesA[0]).cross(m_triangleVerticesA[2]-m_triangleVerticesA[0])).length2();
|
|
///skip degenerate triangles
|
|
if (crossASqr< m_triangleInfoMap->m_equalVertexThreshold)
|
|
return;
|
|
|
|
#if 0
|
|
printf("triangle A[0] = (%f,%f,%f)\ntriangle A[1] = (%f,%f,%f)\ntriangle A[2] = (%f,%f,%f)\n",
|
|
m_triangleVerticesA[0].getX(),m_triangleVerticesA[0].getY(),m_triangleVerticesA[0].getZ(),
|
|
m_triangleVerticesA[1].getX(),m_triangleVerticesA[1].getY(),m_triangleVerticesA[1].getZ(),
|
|
m_triangleVerticesA[2].getX(),m_triangleVerticesA[2].getY(),m_triangleVerticesA[2].getZ());
|
|
|
|
printf("partId=%d, triangleIndex=%d\n",partId,triangleIndex);
|
|
printf("triangle B[0] = (%f,%f,%f)\ntriangle B[1] = (%f,%f,%f)\ntriangle B[2] = (%f,%f,%f)\n",
|
|
triangle[0].getX(),triangle[0].getY(),triangle[0].getZ(),
|
|
triangle[1].getX(),triangle[1].getY(),triangle[1].getZ(),
|
|
triangle[2].getX(),triangle[2].getY(),triangle[2].getZ());
|
|
#endif
|
|
|
|
for (int i=0;i<3;i++)
|
|
{
|
|
for (int j=0;j<3;j++)
|
|
{
|
|
if ( (m_triangleVerticesA[i]-triangle[j]).length2() < m_triangleInfoMap->m_equalVertexThreshold)
|
|
{
|
|
sharedVertsA[numshared] = i;
|
|
sharedVertsB[numshared] = j;
|
|
numshared++;
|
|
///degenerate case
|
|
if(numshared >= 3)
|
|
return;
|
|
}
|
|
}
|
|
///degenerate case
|
|
if(numshared >= 3)
|
|
return;
|
|
}
|
|
switch (numshared)
|
|
{
|
|
case 0:
|
|
{
|
|
break;
|
|
}
|
|
case 1:
|
|
{
|
|
//shared vertex
|
|
break;
|
|
}
|
|
case 2:
|
|
{
|
|
//shared edge
|
|
//we need to make sure the edge is in the order V2V0 and not V0V2 so that the signs are correct
|
|
if (sharedVertsA[0] == 0 && sharedVertsA[1] == 2)
|
|
{
|
|
sharedVertsA[0] = 2;
|
|
sharedVertsA[1] = 0;
|
|
int tmp = sharedVertsB[1];
|
|
sharedVertsB[1] = sharedVertsB[0];
|
|
sharedVertsB[0] = tmp;
|
|
}
|
|
|
|
int hash = btGetHash(m_partIdA,m_triangleIndexA);
|
|
|
|
btTriangleInfo* info = m_triangleInfoMap->find(hash);
|
|
if (!info)
|
|
{
|
|
btTriangleInfo tmp;
|
|
m_triangleInfoMap->insert(hash,tmp);
|
|
info = m_triangleInfoMap->find(hash);
|
|
}
|
|
|
|
int sumvertsA = sharedVertsA[0]+sharedVertsA[1];
|
|
int otherIndexA = 3-sumvertsA;
|
|
|
|
|
|
btVector3 edge(m_triangleVerticesA[sharedVertsA[1]]-m_triangleVerticesA[sharedVertsA[0]]);
|
|
|
|
btTriangleShape tA(m_triangleVerticesA[0],m_triangleVerticesA[1],m_triangleVerticesA[2]);
|
|
int otherIndexB = 3-(sharedVertsB[0]+sharedVertsB[1]);
|
|
|
|
btTriangleShape tB(triangle[sharedVertsB[1]],triangle[sharedVertsB[0]],triangle[otherIndexB]);
|
|
//btTriangleShape tB(triangle[0],triangle[1],triangle[2]);
|
|
|
|
btVector3 normalA;
|
|
btVector3 normalB;
|
|
tA.calcNormal(normalA);
|
|
tB.calcNormal(normalB);
|
|
edge.normalize();
|
|
btVector3 edgeCrossA = edge.cross(normalA).normalize();
|
|
|
|
{
|
|
btVector3 tmp = m_triangleVerticesA[otherIndexA]-m_triangleVerticesA[sharedVertsA[0]];
|
|
if (edgeCrossA.dot(tmp) < 0)
|
|
{
|
|
edgeCrossA*=-1;
|
|
}
|
|
}
|
|
|
|
btVector3 edgeCrossB = edge.cross(normalB).normalize();
|
|
|
|
{
|
|
btVector3 tmp = triangle[otherIndexB]-triangle[sharedVertsB[0]];
|
|
if (edgeCrossB.dot(tmp) < 0)
|
|
{
|
|
edgeCrossB*=-1;
|
|
}
|
|
}
|
|
|
|
btScalar angle2 = 0;
|
|
btScalar ang4 = 0.f;
|
|
|
|
|
|
btVector3 calculatedEdge = edgeCrossA.cross(edgeCrossB);
|
|
btScalar len2 = calculatedEdge.length2();
|
|
|
|
btScalar correctedAngle(0);
|
|
//btVector3 calculatedNormalB = normalA;
|
|
bool isConvex = false;
|
|
|
|
if (len2<m_triangleInfoMap->m_planarEpsilon)
|
|
{
|
|
angle2 = 0.f;
|
|
ang4 = 0.f;
|
|
} else
|
|
{
|
|
|
|
calculatedEdge.normalize();
|
|
btVector3 calculatedNormalA = calculatedEdge.cross(edgeCrossA);
|
|
calculatedNormalA.normalize();
|
|
angle2 = btGetAngle(calculatedNormalA,edgeCrossA,edgeCrossB);
|
|
ang4 = SIMD_PI-angle2;
|
|
btScalar dotA = normalA.dot(edgeCrossB);
|
|
///@todo: check if we need some epsilon, due to floating point imprecision
|
|
isConvex = (dotA<0.);
|
|
|
|
correctedAngle = isConvex ? ang4 : -ang4;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//alternatively use
|
|
//btVector3 calculatedNormalB2 = quatRotate(orn,normalA);
|
|
|
|
|
|
switch (sumvertsA)
|
|
{
|
|
case 1:
|
|
{
|
|
btVector3 edge = m_triangleVerticesA[0]-m_triangleVerticesA[1];
|
|
btQuaternion orn(edge,-correctedAngle);
|
|
btVector3 computedNormalB = quatRotate(orn,normalA);
|
|
btScalar bla = computedNormalB.dot(normalB);
|
|
if (bla<0)
|
|
{
|
|
computedNormalB*=-1;
|
|
info->m_flags |= TRI_INFO_V0V1_SWAP_NORMALB;
|
|
}
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
if ((computedNormalB-normalB).length()>0.0001)
|
|
{
|
|
printf("warning: normals not identical\n");
|
|
}
|
|
#endif//DEBUG_INTERNAL_EDGE
|
|
|
|
info->m_edgeV0V1Angle = -correctedAngle;
|
|
|
|
if (isConvex)
|
|
info->m_flags |= TRI_INFO_V0V1_CONVEX;
|
|
break;
|
|
}
|
|
case 2:
|
|
{
|
|
btVector3 edge = m_triangleVerticesA[2]-m_triangleVerticesA[0];
|
|
btQuaternion orn(edge,-correctedAngle);
|
|
btVector3 computedNormalB = quatRotate(orn,normalA);
|
|
if (computedNormalB.dot(normalB)<0)
|
|
{
|
|
computedNormalB*=-1;
|
|
info->m_flags |= TRI_INFO_V2V0_SWAP_NORMALB;
|
|
}
|
|
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
if ((computedNormalB-normalB).length()>0.0001)
|
|
{
|
|
printf("warning: normals not identical\n");
|
|
}
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
info->m_edgeV2V0Angle = -correctedAngle;
|
|
if (isConvex)
|
|
info->m_flags |= TRI_INFO_V2V0_CONVEX;
|
|
break;
|
|
}
|
|
case 3:
|
|
{
|
|
btVector3 edge = m_triangleVerticesA[1]-m_triangleVerticesA[2];
|
|
btQuaternion orn(edge,-correctedAngle);
|
|
btVector3 computedNormalB = quatRotate(orn,normalA);
|
|
if (computedNormalB.dot(normalB)<0)
|
|
{
|
|
info->m_flags |= TRI_INFO_V1V2_SWAP_NORMALB;
|
|
computedNormalB*=-1;
|
|
}
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
if ((computedNormalB-normalB).length()>0.0001)
|
|
{
|
|
printf("warning: normals not identical\n");
|
|
}
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
info->m_edgeV1V2Angle = -correctedAngle;
|
|
|
|
if (isConvex)
|
|
info->m_flags |= TRI_INFO_V1V2_CONVEX;
|
|
break;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
// printf("warning: duplicate triangle\n");
|
|
}
|
|
|
|
}
|
|
}
|
|
};
|
|
/////////////////////////////////////////////////////////
|
|
/////////////////////////////////////////////////////////
|
|
|
|
void btGenerateInternalEdgeInfo (btBvhTriangleMeshShape*trimeshShape, btTriangleInfoMap* triangleInfoMap)
|
|
{
|
|
//the user pointer shouldn't already be used for other purposes, we intend to store connectivity info there!
|
|
if (trimeshShape->getTriangleInfoMap())
|
|
return;
|
|
|
|
trimeshShape->setTriangleInfoMap(triangleInfoMap);
|
|
|
|
btStridingMeshInterface* meshInterface = trimeshShape->getMeshInterface();
|
|
const btVector3& meshScaling = meshInterface->getScaling();
|
|
|
|
for (int partId = 0; partId< meshInterface->getNumSubParts();partId++)
|
|
{
|
|
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;
|
|
//PHY_ScalarType indexType=0;
|
|
|
|
btVector3 triangleVerts[3];
|
|
meshInterface->getLockedReadOnlyVertexIndexBase(&vertexbase,numverts, type,stride,&indexbase,indexstride,numfaces,indicestype,partId);
|
|
btVector3 aabbMin,aabbMax;
|
|
|
|
for (int triangleIndex = 0 ; triangleIndex < numfaces;triangleIndex++)
|
|
{
|
|
unsigned int* gfxbase = (unsigned int*)(indexbase+triangleIndex*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]);
|
|
|
|
btConnectivityProcessor connectivityProcessor;
|
|
connectivityProcessor.m_partIdA = partId;
|
|
connectivityProcessor.m_triangleIndexA = triangleIndex;
|
|
connectivityProcessor.m_triangleVerticesA = &triangleVerts[0];
|
|
connectivityProcessor.m_triangleInfoMap = triangleInfoMap;
|
|
|
|
trimeshShape->processAllTriangles(&connectivityProcessor,aabbMin,aabbMax);
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Given a point and a line segment (defined by two points), compute the closest point
|
|
// in the line. Cap the point at the endpoints of the line segment.
|
|
void btNearestPointInLineSegment(const btVector3 &point, const btVector3& line0, const btVector3& line1, btVector3& nearestPoint)
|
|
{
|
|
btVector3 lineDelta = line1 - line0;
|
|
|
|
// Handle degenerate lines
|
|
if ( lineDelta.fuzzyZero())
|
|
{
|
|
nearestPoint = line0;
|
|
}
|
|
else
|
|
{
|
|
btScalar delta = (point-line0).dot(lineDelta) / (lineDelta).dot(lineDelta);
|
|
|
|
// Clamp the point to conform to the segment's endpoints
|
|
if ( delta < 0 )
|
|
delta = 0;
|
|
else if ( delta > 1 )
|
|
delta = 1;
|
|
|
|
nearestPoint = line0 + lineDelta*delta;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
bool btClampNormal(const btVector3& edge,const btVector3& tri_normal_org,const btVector3& localContactNormalOnB, btScalar correctedEdgeAngle, btVector3 & clampedLocalNormal)
|
|
{
|
|
btVector3 tri_normal = tri_normal_org;
|
|
//we only have a local triangle normal, not a local contact normal -> only normal in world space...
|
|
//either compute the current angle all in local space, or all in world space
|
|
|
|
btVector3 edgeCross = edge.cross(tri_normal).normalize();
|
|
btScalar curAngle = btGetAngle(edgeCross,tri_normal,localContactNormalOnB);
|
|
|
|
if (correctedEdgeAngle<0)
|
|
{
|
|
if (curAngle < correctedEdgeAngle)
|
|
{
|
|
btScalar diffAngle = correctedEdgeAngle-curAngle;
|
|
btQuaternion rotation(edge,diffAngle );
|
|
clampedLocalNormal = btMatrix3x3(rotation)*localContactNormalOnB;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (correctedEdgeAngle>=0)
|
|
{
|
|
if (curAngle > correctedEdgeAngle)
|
|
{
|
|
btScalar diffAngle = correctedEdgeAngle-curAngle;
|
|
btQuaternion rotation(edge,diffAngle );
|
|
clampedLocalNormal = btMatrix3x3(rotation)*localContactNormalOnB;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
/// Changes a btManifoldPoint collision normal to the normal from the mesh.
|
|
void btAdjustInternalEdgeContacts(btManifoldPoint& cp, const btCollisionObjectWrapper* colObj0Wrap,const btCollisionObjectWrapper* colObj1Wrap, int partId0, int index0, int normalAdjustFlags)
|
|
{
|
|
//btAssert(colObj0->getCollisionShape()->getShapeType() == TRIANGLE_SHAPE_PROXYTYPE);
|
|
if (colObj0Wrap->getCollisionShape()->getShapeType() != TRIANGLE_SHAPE_PROXYTYPE)
|
|
return;
|
|
|
|
btBvhTriangleMeshShape* trimesh = 0;
|
|
|
|
if( colObj0Wrap->getCollisionObject()->getCollisionShape()->getShapeType() == SCALED_TRIANGLE_MESH_SHAPE_PROXYTYPE )
|
|
trimesh = ((btScaledBvhTriangleMeshShape*)colObj0Wrap->getCollisionObject()->getCollisionShape())->getChildShape();
|
|
else
|
|
trimesh = (btBvhTriangleMeshShape*)colObj0Wrap->getCollisionObject()->getCollisionShape();
|
|
|
|
btTriangleInfoMap* triangleInfoMapPtr = (btTriangleInfoMap*) trimesh->getTriangleInfoMap();
|
|
if (!triangleInfoMapPtr)
|
|
return;
|
|
|
|
int hash = btGetHash(partId0,index0);
|
|
|
|
|
|
btTriangleInfo* info = triangleInfoMapPtr->find(hash);
|
|
if (!info)
|
|
return;
|
|
|
|
btScalar frontFacing = (normalAdjustFlags & BT_TRIANGLE_CONVEX_BACKFACE_MODE)==0? 1.f : -1.f;
|
|
|
|
const btTriangleShape* tri_shape = static_cast<const btTriangleShape*>(colObj0Wrap->getCollisionShape());
|
|
btVector3 v0,v1,v2;
|
|
tri_shape->getVertex(0,v0);
|
|
tri_shape->getVertex(1,v1);
|
|
tri_shape->getVertex(2,v2);
|
|
|
|
//btVector3 center = (v0+v1+v2)*btScalar(1./3.);
|
|
|
|
btVector3 red(1,0,0), green(0,1,0),blue(0,0,1),white(1,1,1),black(0,0,0);
|
|
btVector3 tri_normal;
|
|
tri_shape->calcNormal(tri_normal);
|
|
|
|
//btScalar dot = tri_normal.dot(cp.m_normalWorldOnB);
|
|
btVector3 nearest;
|
|
btNearestPointInLineSegment(cp.m_localPointB,v0,v1,nearest);
|
|
|
|
btVector3 contact = cp.m_localPointB;
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
const btTransform& tr = colObj0->getWorldTransform();
|
|
btDebugDrawLine(tr*nearest,tr*cp.m_localPointB,red);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
|
|
|
|
bool isNearEdge = false;
|
|
|
|
int numConcaveEdgeHits = 0;
|
|
int numConvexEdgeHits = 0;
|
|
|
|
btVector3 localContactNormalOnB = colObj0Wrap->getWorldTransform().getBasis().transpose() * cp.m_normalWorldOnB;
|
|
localContactNormalOnB.normalize();//is this necessary?
|
|
|
|
// Get closest edge
|
|
int bestedge=-1;
|
|
btScalar disttobestedge=BT_LARGE_FLOAT;
|
|
//
|
|
// Edge 0 -> 1
|
|
if (btFabs(info->m_edgeV0V1Angle)< triangleInfoMapPtr->m_maxEdgeAngleThreshold)
|
|
{
|
|
btVector3 nearest;
|
|
btNearestPointInLineSegment( cp.m_localPointB, v0, v1, nearest );
|
|
btScalar len=(contact-nearest).length();
|
|
//
|
|
if( len < disttobestedge )
|
|
{
|
|
bestedge=0;
|
|
disttobestedge=len;
|
|
}
|
|
}
|
|
// Edge 1 -> 2
|
|
if (btFabs(info->m_edgeV1V2Angle)< triangleInfoMapPtr->m_maxEdgeAngleThreshold)
|
|
{
|
|
btVector3 nearest;
|
|
btNearestPointInLineSegment( cp.m_localPointB, v1, v2, nearest );
|
|
btScalar len=(contact-nearest).length();
|
|
//
|
|
if( len < disttobestedge )
|
|
{
|
|
bestedge=1;
|
|
disttobestedge=len;
|
|
}
|
|
}
|
|
// Edge 2 -> 0
|
|
if (btFabs(info->m_edgeV2V0Angle)< triangleInfoMapPtr->m_maxEdgeAngleThreshold)
|
|
{
|
|
btVector3 nearest;
|
|
btNearestPointInLineSegment( cp.m_localPointB, v2, v0, nearest );
|
|
btScalar len=(contact-nearest).length();
|
|
//
|
|
if( len < disttobestedge )
|
|
{
|
|
bestedge=2;
|
|
disttobestedge=len;
|
|
}
|
|
}
|
|
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btVector3 upfix=tri_normal * btVector3(0.1f,0.1f,0.1f);
|
|
btDebugDrawLine(tr * v0 + upfix, tr * v1 + upfix, red );
|
|
#endif
|
|
if (btFabs(info->m_edgeV0V1Angle)< triangleInfoMapPtr->m_maxEdgeAngleThreshold)
|
|
{
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*contact,tr*(contact+cp.m_normalWorldOnB*10),black);
|
|
#endif
|
|
btScalar len = (contact-nearest).length();
|
|
if(len<triangleInfoMapPtr->m_edgeDistanceThreshold)
|
|
if( bestedge==0 )
|
|
{
|
|
btVector3 edge(v0-v1);
|
|
isNearEdge = true;
|
|
|
|
if (info->m_edgeV0V1Angle==btScalar(0))
|
|
{
|
|
numConcaveEdgeHits++;
|
|
} else
|
|
{
|
|
|
|
bool isEdgeConvex = (info->m_flags & TRI_INFO_V0V1_CONVEX);
|
|
btScalar swapFactor = isEdgeConvex ? btScalar(1) : btScalar(-1);
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*(nearest+swapFactor*tri_normal*10),white);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
btVector3 nA = swapFactor * tri_normal;
|
|
|
|
btQuaternion orn(edge,info->m_edgeV0V1Angle);
|
|
btVector3 computedNormalB = quatRotate(orn,tri_normal);
|
|
if (info->m_flags & TRI_INFO_V0V1_SWAP_NORMALB)
|
|
computedNormalB*=-1;
|
|
btVector3 nB = swapFactor*computedNormalB;
|
|
|
|
btScalar NdotA = localContactNormalOnB.dot(nA);
|
|
btScalar NdotB = localContactNormalOnB.dot(nB);
|
|
bool backFacingNormal = (NdotA< triangleInfoMapPtr->m_convexEpsilon) && (NdotB<triangleInfoMapPtr->m_convexEpsilon);
|
|
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
{
|
|
|
|
btDebugDrawLine(cp.getPositionWorldOnB(),cp.getPositionWorldOnB()+tr.getBasis()*(nB*20),red);
|
|
}
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
|
|
|
|
if (backFacingNormal)
|
|
{
|
|
numConcaveEdgeHits++;
|
|
}
|
|
else
|
|
{
|
|
numConvexEdgeHits++;
|
|
btVector3 clampedLocalNormal;
|
|
bool isClamped = btClampNormal(edge,swapFactor*tri_normal,localContactNormalOnB, info->m_edgeV0V1Angle,clampedLocalNormal);
|
|
if (isClamped)
|
|
{
|
|
if (((normalAdjustFlags & BT_TRIANGLE_CONVEX_DOUBLE_SIDED)!=0) || (clampedLocalNormal.dot(frontFacing*tri_normal)>0))
|
|
{
|
|
btVector3 newNormal = colObj0Wrap->getWorldTransform().getBasis() * clampedLocalNormal;
|
|
// cp.m_distance1 = cp.m_distance1 * newNormal.dot(cp.m_normalWorldOnB);
|
|
cp.m_normalWorldOnB = newNormal;
|
|
// Reproject collision point along normal. (what about cp.m_distance1?)
|
|
cp.m_positionWorldOnB = cp.m_positionWorldOnA - cp.m_normalWorldOnB * cp.m_distance1;
|
|
cp.m_localPointB = colObj0Wrap->getWorldTransform().invXform(cp.m_positionWorldOnB);
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
btNearestPointInLineSegment(contact,v1,v2,nearest);
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*cp.m_localPointB,green);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr * v1 + upfix, tr * v2 + upfix , green );
|
|
#endif
|
|
|
|
if (btFabs(info->m_edgeV1V2Angle)< triangleInfoMapPtr->m_maxEdgeAngleThreshold)
|
|
{
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*contact,tr*(contact+cp.m_normalWorldOnB*10),black);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
|
|
|
|
btScalar len = (contact-nearest).length();
|
|
if(len<triangleInfoMapPtr->m_edgeDistanceThreshold)
|
|
if( bestedge==1 )
|
|
{
|
|
isNearEdge = true;
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*(nearest+tri_normal*10),white);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
btVector3 edge(v1-v2);
|
|
|
|
isNearEdge = true;
|
|
|
|
if (info->m_edgeV1V2Angle == btScalar(0))
|
|
{
|
|
numConcaveEdgeHits++;
|
|
} else
|
|
{
|
|
bool isEdgeConvex = (info->m_flags & TRI_INFO_V1V2_CONVEX)!=0;
|
|
btScalar swapFactor = isEdgeConvex ? btScalar(1) : btScalar(-1);
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*(nearest+swapFactor*tri_normal*10),white);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
btVector3 nA = swapFactor * tri_normal;
|
|
|
|
btQuaternion orn(edge,info->m_edgeV1V2Angle);
|
|
btVector3 computedNormalB = quatRotate(orn,tri_normal);
|
|
if (info->m_flags & TRI_INFO_V1V2_SWAP_NORMALB)
|
|
computedNormalB*=-1;
|
|
btVector3 nB = swapFactor*computedNormalB;
|
|
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
{
|
|
btDebugDrawLine(cp.getPositionWorldOnB(),cp.getPositionWorldOnB()+tr.getBasis()*(nB*20),red);
|
|
}
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
|
|
|
|
btScalar NdotA = localContactNormalOnB.dot(nA);
|
|
btScalar NdotB = localContactNormalOnB.dot(nB);
|
|
bool backFacingNormal = (NdotA< triangleInfoMapPtr->m_convexEpsilon) && (NdotB<triangleInfoMapPtr->m_convexEpsilon);
|
|
|
|
if (backFacingNormal)
|
|
{
|
|
numConcaveEdgeHits++;
|
|
}
|
|
else
|
|
{
|
|
numConvexEdgeHits++;
|
|
btVector3 localContactNormalOnB = colObj0Wrap->getWorldTransform().getBasis().transpose() * cp.m_normalWorldOnB;
|
|
btVector3 clampedLocalNormal;
|
|
bool isClamped = btClampNormal(edge,swapFactor*tri_normal,localContactNormalOnB, info->m_edgeV1V2Angle,clampedLocalNormal);
|
|
if (isClamped)
|
|
{
|
|
if (((normalAdjustFlags & BT_TRIANGLE_CONVEX_DOUBLE_SIDED)!=0) || (clampedLocalNormal.dot(frontFacing*tri_normal)>0))
|
|
{
|
|
btVector3 newNormal = colObj0Wrap->getWorldTransform().getBasis() * clampedLocalNormal;
|
|
// cp.m_distance1 = cp.m_distance1 * newNormal.dot(cp.m_normalWorldOnB);
|
|
cp.m_normalWorldOnB = newNormal;
|
|
// Reproject collision point along normal.
|
|
cp.m_positionWorldOnB = cp.m_positionWorldOnA - cp.m_normalWorldOnB * cp.m_distance1;
|
|
cp.m_localPointB = colObj0Wrap->getWorldTransform().invXform(cp.m_positionWorldOnB);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
btNearestPointInLineSegment(contact,v2,v0,nearest);
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*cp.m_localPointB,blue);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr * v2 + upfix, tr * v0 + upfix , blue );
|
|
#endif
|
|
|
|
if (btFabs(info->m_edgeV2V0Angle)< triangleInfoMapPtr->m_maxEdgeAngleThreshold)
|
|
{
|
|
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*contact,tr*(contact+cp.m_normalWorldOnB*10),black);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
btScalar len = (contact-nearest).length();
|
|
if(len<triangleInfoMapPtr->m_edgeDistanceThreshold)
|
|
if( bestedge==2 )
|
|
{
|
|
isNearEdge = true;
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*(nearest+tri_normal*10),white);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
btVector3 edge(v2-v0);
|
|
|
|
if (info->m_edgeV2V0Angle==btScalar(0))
|
|
{
|
|
numConcaveEdgeHits++;
|
|
} else
|
|
{
|
|
|
|
bool isEdgeConvex = (info->m_flags & TRI_INFO_V2V0_CONVEX)!=0;
|
|
btScalar swapFactor = isEdgeConvex ? btScalar(1) : btScalar(-1);
|
|
#ifdef BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
btDebugDrawLine(tr*nearest,tr*(nearest+swapFactor*tri_normal*10),white);
|
|
#endif //BT_INTERNAL_EDGE_DEBUG_DRAW
|
|
|
|
btVector3 nA = swapFactor * tri_normal;
|
|
btQuaternion orn(edge,info->m_edgeV2V0Angle);
|
|
btVector3 computedNormalB = quatRotate(orn,tri_normal);
|
|
if (info->m_flags & TRI_INFO_V2V0_SWAP_NORMALB)
|
|
computedNormalB*=-1;
|
|
btVector3 nB = swapFactor*computedNormalB;
|
|
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
{
|
|
btDebugDrawLine(cp.getPositionWorldOnB(),cp.getPositionWorldOnB()+tr.getBasis()*(nB*20),red);
|
|
}
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
|
|
btScalar NdotA = localContactNormalOnB.dot(nA);
|
|
btScalar NdotB = localContactNormalOnB.dot(nB);
|
|
bool backFacingNormal = (NdotA< triangleInfoMapPtr->m_convexEpsilon) && (NdotB<triangleInfoMapPtr->m_convexEpsilon);
|
|
|
|
if (backFacingNormal)
|
|
{
|
|
numConcaveEdgeHits++;
|
|
}
|
|
else
|
|
{
|
|
numConvexEdgeHits++;
|
|
// printf("hitting convex edge\n");
|
|
|
|
|
|
btVector3 localContactNormalOnB = colObj0Wrap->getWorldTransform().getBasis().transpose() * cp.m_normalWorldOnB;
|
|
btVector3 clampedLocalNormal;
|
|
bool isClamped = btClampNormal(edge,swapFactor*tri_normal,localContactNormalOnB,info->m_edgeV2V0Angle,clampedLocalNormal);
|
|
if (isClamped)
|
|
{
|
|
if (((normalAdjustFlags & BT_TRIANGLE_CONVEX_DOUBLE_SIDED)!=0) || (clampedLocalNormal.dot(frontFacing*tri_normal)>0))
|
|
{
|
|
btVector3 newNormal = colObj0Wrap->getWorldTransform().getBasis() * clampedLocalNormal;
|
|
// cp.m_distance1 = cp.m_distance1 * newNormal.dot(cp.m_normalWorldOnB);
|
|
cp.m_normalWorldOnB = newNormal;
|
|
// Reproject collision point along normal.
|
|
cp.m_positionWorldOnB = cp.m_positionWorldOnA - cp.m_normalWorldOnB * cp.m_distance1;
|
|
cp.m_localPointB = colObj0Wrap->getWorldTransform().invXform(cp.m_positionWorldOnB);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_INTERNAL_EDGE
|
|
{
|
|
btVector3 color(0,1,1);
|
|
btDebugDrawLine(cp.getPositionWorldOnB(),cp.getPositionWorldOnB()+cp.m_normalWorldOnB*10,color);
|
|
}
|
|
#endif //DEBUG_INTERNAL_EDGE
|
|
|
|
if (isNearEdge)
|
|
{
|
|
|
|
if (numConcaveEdgeHits>0)
|
|
{
|
|
if ((normalAdjustFlags & BT_TRIANGLE_CONCAVE_DOUBLE_SIDED)!=0)
|
|
{
|
|
//fix tri_normal so it pointing the same direction as the current local contact normal
|
|
if (tri_normal.dot(localContactNormalOnB) < 0)
|
|
{
|
|
tri_normal *= -1;
|
|
}
|
|
cp.m_normalWorldOnB = colObj0Wrap->getWorldTransform().getBasis()*tri_normal;
|
|
} else
|
|
{
|
|
btVector3 newNormal = tri_normal *frontFacing;
|
|
//if the tri_normal is pointing opposite direction as the current local contact normal, skip it
|
|
btScalar d = newNormal.dot(localContactNormalOnB) ;
|
|
if (d< 0)
|
|
{
|
|
return;
|
|
}
|
|
//modify the normal to be the triangle normal (or backfacing normal)
|
|
cp.m_normalWorldOnB = colObj0Wrap->getWorldTransform().getBasis() *newNormal;
|
|
}
|
|
|
|
// Reproject collision point along normal.
|
|
cp.m_positionWorldOnB = cp.m_positionWorldOnA - cp.m_normalWorldOnB * cp.m_distance1;
|
|
cp.m_localPointB = colObj0Wrap->getWorldTransform().invXform(cp.m_positionWorldOnB);
|
|
}
|
|
}
|
|
}
|