void COctreeTriangleSelector::getTrianglesFromOctree(
SOctreeNode* node, s32& trianglesWritten,
s32 maximumSize, const core::aabbox3d<f32>& box,
const core::matrix4* mat, core::triangle3df* triangles) const
{
if (!box.intersectsWithBox(node->Box))
return;
const u32 cnt = node->Triangles.size();
for (u32 i=0; i<cnt; ++i)
{
const core::triangle3df& srcTri = node->Triangles[i];
// This isn't an accurate test, but it's fast, and the
// API contract doesn't guarantee complete accuracy.
if (srcTri.isTotalOutsideBox(box))
continue;
core::triangle3df& dstTri = triangles[trianglesWritten];
mat->transformVect(dstTri.pointA, srcTri.pointA );
mat->transformVect(dstTri.pointB, srcTri.pointB );
mat->transformVect(dstTri.pointC, srcTri.pointC );
++trianglesWritten;
// Halt when the out array is full.
if (trianglesWritten == maximumSize)
return;
}
for (u32 i=0; i<8; ++i)
if (node->Child[i])
getTrianglesFromOctree(node->Child[i], trianglesWritten,
maximumSize, box, mat, triangles);
}
//! Gets all triangles which lie within a specific bounding box.
void COctreeTriangleSelector::getTriangles(core::triangle3df* triangles,
s32 arraySize, s32& outTriangleCount,
const core::aabbox3d<f32>& box,
const core::matrix4* transform) const
{
core::matrix4 mat(core::matrix4::EM4CONST_NOTHING);
core::aabbox3d<f32> invbox = box;
if (SceneNode)
{
SceneNode->getAbsoluteTransformation().getInverse(mat);
mat.transformBoxEx(invbox);
}
if (transform)
mat = *transform;
else
mat.makeIdentity();
if (SceneNode)
mat *= SceneNode->getAbsoluteTransformation();
s32 trianglesWritten = 0;
if (Root)
getTrianglesFromOctree(Root, trianglesWritten,
arraySize, invbox, &mat, triangles);
outTriangleCount = trianglesWritten;
}
//! Gets all triangles which lie within a specific bounding box.
void COctreeTriangleSelector::getTriangles(triangle3df* triangles,
SINT32 arraySize, SINT32& outTriangleCount,
const AxisAlignedBox& box,
const Matrix4* transform) const
{
Matrix4 mat(Matrix4::ZERO);
AxisAlignedBox invbox = box;
if (SceneNode)
{
//SceneNode->getAbsoluteTransformation().getInverse(mat);
mat = SceneNode->getAbsoluteTransformation();
mat.inverse();
//mat.transformBoxEx(invbox);
invbox.transform(mat);
}
if (transform)
mat = *transform;
else
mat = Matrix4::IDENTITY;
if (SceneNode)
//mat *= SceneNode->getAbsoluteTransformation();
mat = SceneNode->getAbsoluteTransformation() * mat;
SINT32 trianglesWritten = 0;
if (Root)
getTrianglesFromOctree(Root, trianglesWritten,
arraySize, invbox, &mat, triangles);
outTriangleCount = trianglesWritten;
}
void COctreeTriangleSelector::getTrianglesFromOctree(
SOctreeNode* node, s32& trianglesWritten,
s32 maximumSize, const core::aabbox3d<f32>& box,
const core::matrix4* mat, core::triangle3df* triangles) const
{
if (!box.intersectsWithBox(node->Box))
return;
s32 cnt = node->Triangles.size();
if (cnt + trianglesWritten > maximumSize)
cnt -= cnt + trianglesWritten - maximumSize;
s32 i;
for (i=0; i<cnt; ++i)
{
mat->transformVect(triangles[trianglesWritten].pointA, node->Triangles[i].pointA );
mat->transformVect(triangles[trianglesWritten].pointB, node->Triangles[i].pointB );
mat->transformVect(triangles[trianglesWritten].pointC, node->Triangles[i].pointC );
++trianglesWritten;
}
for (i=0; i<8; ++i)
if (node->Child[i])
getTrianglesFromOctree(node->Child[i], trianglesWritten,
maximumSize, box, mat, triangles);
}
//! Gets all triangles which have or may have contact with a 3d line.
// new version: from user Piraaate
void COctreeTriangleSelector::getTriangles(triangle3df* triangles, SINT32 arraySize,
SINT32& outTriangleCount, const line3df& line,
const Matrix4* transform) const
{
#if 0
AxisAlignedBox box(line.start);
box.addInternalPoint(line.end);
// TODO: Could be optimized for line a little bit more.
COctreeTriangleSelector::getTriangles(triangles, arraySize, outTriangleCount,
box, transform);
#else
Matrix4 mat(Matrix4::ZERO);
Vector3 vectStartInv(line.start), vectEndInv(line.end);
if (SceneNode)
{
mat = SceneNode->getAbsoluteTransformation();
//mat.makeInverse();
mat = Matrix4::IDENTITY;
//mat.transformVect(vectStartInv, line.start);
//mat.transformVect(vectEndInv, line.end);
vectStartInv = mat.transformAffine(line.start);
vectEndInv = mat.transformAffine(line.end);
}
line3d<FLOAT32> invline(vectStartInv, vectEndInv);
//mat.makeIdentity();
mat = Matrix4::IDENTITY;
if (transform)
mat = (*transform);
if (SceneNode)
mat = SceneNode->getAbsoluteTransformation() * mat;//mat *= SceneNode->getAbsoluteTransformation();
SINT32 trianglesWritten = 0;
if (Root)
getTrianglesFromOctree(Root, trianglesWritten, arraySize, invline, &mat, triangles);
outTriangleCount = trianglesWritten;
#endif
}
//! Gets all triangles which have or may have contact with a 3d line.
// new version: from user Piraaate
void COctreeTriangleSelector::getTriangles(core::triangle3df* triangles, s32 arraySize,
s32& outTriangleCount, const core::line3d<f32>& line,
const core::matrix4* transform) const
{
#if 0
core::aabbox3d<f32> box(line.start);
box.addInternalPoint(line.end);
// TODO: Could be optimized for line a little bit more.
COctreeTriangleSelector::getTriangles(triangles, arraySize, outTriangleCount,
box, transform);
#else
core::matrix4 mat ( core::matrix4::EM4CONST_NOTHING );
core::vector3df vectStartInv ( line.start ), vectEndInv ( line.end );
if (SceneNode)
{
mat = SceneNode->getAbsoluteTransformation();
mat.makeInverse();
mat.transformVect(vectStartInv, line.start);
mat.transformVect(vectEndInv, line.end);
}
core::line3d<f32> invline(vectStartInv, vectEndInv);
mat.makeIdentity();
if (transform)
mat = (*transform);
if (SceneNode)
mat *= SceneNode->getAbsoluteTransformation();
s32 trianglesWritten = 0;
if (Root)
getTrianglesFromOctree(Root, trianglesWritten, arraySize, invline, &mat, triangles);
outTriangleCount = trianglesWritten;
#endif
}
void COctreeTriangleSelector::getTrianglesFromOctree(SOctreeNode* node,
SINT32& trianglesWritten, SINT32 maximumSize, const line3d<FLOAT32>& line,
const Matrix4* transform, triangle3df* triangles) const
{
if (!node->Box.intersectsWithLine(line))
return;
SINT32 cnt = node->Triangles.size();
if (cnt + trianglesWritten > maximumSize)
cnt -= cnt + trianglesWritten - maximumSize;
SINT32 i;
if (transform->isIdentify())
{
for (i = 0; i<cnt; ++i)
{
triangles[trianglesWritten] = node->Triangles[i];
++trianglesWritten;
}
}
else
{
for (i = 0; i<cnt; ++i)
{
triangles[trianglesWritten] = node->Triangles[i];
//transform->transformVect(triangles[trianglesWritten].pointA);
//transform->transformVect(triangles[trianglesWritten].pointB);
//transform->transformVect(triangles[trianglesWritten].pointC);
triangles[trianglesWritten].pointA = transform->transformAffine(triangles[trianglesWritten].pointA);
triangles[trianglesWritten].pointB = transform->transformAffine(triangles[trianglesWritten].pointB);
triangles[trianglesWritten].pointC = transform->transformAffine(triangles[trianglesWritten].pointC);
++trianglesWritten;
}
}
for (i = 0; i<8; ++i)
if (node->Child[i])
getTrianglesFromOctree(node->Child[i], trianglesWritten,
maximumSize, line, transform, triangles);
}
