public bool TestIntersection(GeoAABB2 aabb)
{
if (mFlatTreeList == null || mFlatTreeList.Count == 0)
{
return(false);
}
int closer, other;
BVHTraversal[] todo = new BVHTraversal[64];
todo[0] = new BVHTraversal();
int stackptr = 0;
todo[stackptr].mIndex = 0;
todo[stackptr].mLength = -9999999.0f;
while (stackptr >= 0)
{
int ni = todo[stackptr].mIndex;
float near = todo[stackptr].mLength;
stackptr--;
BVHFlatNode2 node = mFlatTreeList[ni];
// 对叶节点做相交测试
if (node.mRightOffset == 0)
{
bool hit = false;
for (int o = 0; o < node.mLeafCount; ++o)
{
BVHObject2 obj = mBuildPrims[(int)node.mStartIndex + o];
hit = obj.TestAABBIntersect(aabb);
if (hit)
{
return(true);
}
}
}
else
{
closer = ni + 1;
other = ni + (int)node.mRightOffset;
// 对父结点做测试
bool hitc0 = GeoAABBUtils.IsAABBInsectAABB2(aabb.mMin, aabb.mMax, mFlatTreeList[closer].mBox.mMin, mFlatTreeList[closer].mBox.mMax);
bool hitc1 = GeoAABBUtils.IsAABBInsectAABB2(aabb.mMin, aabb.mMax, mFlatTreeList[other].mBox.mMin, mFlatTreeList[other].mBox.mMax);
if (hitc0 && hitc1)
{
todo[++stackptr] = new BVHTraversal(other, -9999);
todo[++stackptr] = new BVHTraversal(closer, -9999);
}
else if (hitc0)
{
todo[++stackptr] = new BVHTraversal(closer, -9999);
}
else if (hitc1)
{
todo[++stackptr] = new BVHTraversal(other, -9999);
}
}
}
return(false);
}
private bool IsIntersectOtherAABB(Vector2 v, Vector2 vm)
{
foreach (GeoAABB2 aabb in mLeftRectangle)
{
if (GeoAABBUtils.IsAABBInsectAABB2(v, vm, aabb.mMin, aabb.mMax))
{
return(true);
}
}
return(mBvh.TestIntersection(new GeoAABB2(v, vm)));
}
public bool TestAABBIntersect(GeoAABB2 aabb)
{
return(GeoAABBUtils.IsAABBInsectAABB2(aabb.mMin, aabb.mMax, mAABB2.mMin, mAABB2.mMax));
}