1 files changed, 122 insertions, 0 deletions
diff --git a/libs/ode-0.16.1/OPCODE/OPC_BoxBoxOverlap.h b/libs/ode-0.16.1/OPCODE/OPC_BoxBoxOverlap.h
new file mode 100644
index 0000000..757a17d
--- /dev/null
+++ b/libs/ode-0.16.1/OPCODE/OPC_BoxBoxOverlap.h
@@ -0,0 +1,122 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+/**
+ *	OBB-OBB overlap test using the separating axis theorem.
+ *	- original code by Gomez / Gamasutra (similar to Gottschalk's one in RAPID)
+ *	- optimized for AABB trees by computing the rotation matrix once (SOLID-fashion)
+ *	- the fabs matrix is precomputed as well and epsilon-tweaked (RAPID-style, we found this almost mandatory)
+ *	- Class III axes can be disabled... (SOLID & Intel fashion)
+ *	- ...or enabled to perform some profiling
+ *	- CPU comparisons used when appropriate
+ *	- lazy evaluation sometimes saves some work in case of early exits (unlike SOLID)
+ *
+ *	\param		ea	[in] extents from box A
+ *	\param		ca	[in] center from box A
+ *	\param		eb	[in] extents from box B
+ *	\param		cb	[in] center from box B
+ *	\return		true if boxes overlap
+ */
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+inline_ BOOL AABBTreeCollider::BoxBoxOverlap(const Point& ea, const Point& ca, const Point& eb, const Point& cb)
+{
+	// Stats
+	mNbBVBVTests++;
+
+	float t,t2;
+
+	// Class I : A's basis vectors
+	float Tx = (mR1to0.m[0][0]*cb.x + mR1to0.m[1][0]*cb.y + mR1to0.m[2][0]*cb.z) + mT1to0.x - ca.x;
+	t = ea.x + eb.x*mAR.m[0][0] + eb.y*mAR.m[1][0] + eb.z*mAR.m[2][0];
+	if(GREATER(Tx, t))	return FALSE;
+
+	float Ty = (mR1to0.m[0][1]*cb.x + mR1to0.m[1][1]*cb.y + mR1to0.m[2][1]*cb.z) + mT1to0.y - ca.y;
+	t = ea.y + eb.x*mAR.m[0][1] + eb.y*mAR.m[1][1] + eb.z*mAR.m[2][1];
+	if(GREATER(Ty, t))	return FALSE;
+
+	float Tz = (mR1to0.m[0][2]*cb.x + mR1to0.m[1][2]*cb.y + mR1to0.m[2][2]*cb.z) + mT1to0.z - ca.z;
+	t = ea.z + eb.x*mAR.m[0][2] + eb.y*mAR.m[1][2] + eb.z*mAR.m[2][2];
+	if(GREATER(Tz, t))	return FALSE;
+
+	// Class II : B's basis vectors
+	t = Tx*mR1to0.m[0][0] + Ty*mR1to0.m[0][1] + Tz*mR1to0.m[0][2];	t2 = ea.x*mAR.m[0][0] + ea.y*mAR.m[0][1] + ea.z*mAR.m[0][2] + eb.x;
+	if(GREATER(t, t2))	return FALSE;
+
+	t = Tx*mR1to0.m[1][0] + Ty*mR1to0.m[1][1] + Tz*mR1to0.m[1][2];	t2 = ea.x*mAR.m[1][0] + ea.y*mAR.m[1][1] + ea.z*mAR.m[1][2] + eb.y;
+	if(GREATER(t, t2))	return FALSE;
+
+	t = Tx*mR1to0.m[2][0] + Ty*mR1to0.m[2][1] + Tz*mR1to0.m[2][2];	t2 = ea.x*mAR.m[2][0] + ea.y*mAR.m[2][1] + ea.z*mAR.m[2][2] + eb.z;
+	if(GREATER(t, t2))	return FALSE;
+
+	// Class III : 9 cross products
+	// Cool trick: always perform the full test for first level, regardless of settings.
+	// That way pathological cases (such as the pencils scene) are quickly rejected anyway !
+	if(mFullBoxBoxTest || mNbBVBVTests==1)
+	{
+		t = Tz*mR1to0.m[0][1] - Ty*mR1to0.m[0][2];	t2 = ea.y*mAR.m[0][2] + ea.z*mAR.m[0][1] + eb.y*mAR.m[2][0] + eb.z*mAR.m[1][0];	if(GREATER(t, t2))	return FALSE;	// L = A0 x B0
+		t = Tz*mR1to0.m[1][1] - Ty*mR1to0.m[1][2];	t2 = ea.y*mAR.m[1][2] + ea.z*mAR.m[1][1] + eb.x*mAR.m[2][0] + eb.z*mAR.m[0][0];	if(GREATER(t, t2))	return FALSE;	// L = A0 x B1
+		t = Tz*mR1to0.m[2][1] - Ty*mR1to0.m[2][2];	t2 = ea.y*mAR.m[2][2] + ea.z*mAR.m[2][1] + eb.x*mAR.m[1][0] + eb.y*mAR.m[0][0];	if(GREATER(t, t2))	return FALSE;	// L = A0 x B2
+		t = Tx*mR1to0.m[0][2] - Tz*mR1to0.m[0][0];	t2 = ea.x*mAR.m[0][2] + ea.z*mAR.m[0][0] + eb.y*mAR.m[2][1] + eb.z*mAR.m[1][1];	if(GREATER(t, t2))	return FALSE;	// L = A1 x B0
+		t = Tx*mR1to0.m[1][2] - Tz*mR1to0.m[1][0];	t2 = ea.x*mAR.m[1][2] + ea.z*mAR.m[1][0] + eb.x*mAR.m[2][1] + eb.z*mAR.m[0][1];	if(GREATER(t, t2))	return FALSE;	// L = A1 x B1
+		t = Tx*mR1to0.m[2][2] - Tz*mR1to0.m[2][0];	t2 = ea.x*mAR.m[2][2] + ea.z*mAR.m[2][0] + eb.x*mAR.m[1][1] + eb.y*mAR.m[0][1];	if(GREATER(t, t2))	return FALSE;	// L = A1 x B2
+		t = Ty*mR1to0.m[0][0] - Tx*mR1to0.m[0][1];	t2 = ea.x*mAR.m[0][1] + ea.y*mAR.m[0][0] + eb.y*mAR.m[2][2] + eb.z*mAR.m[1][2];	if(GREATER(t, t2))	return FALSE;	// L = A2 x B0
+		t = Ty*mR1to0.m[1][0] - Tx*mR1to0.m[1][1];	t2 = ea.x*mAR.m[1][1] + ea.y*mAR.m[1][0] + eb.x*mAR.m[2][2] + eb.z*mAR.m[0][2];	if(GREATER(t, t2))	return FALSE;	// L = A2 x B1
+		t = Ty*mR1to0.m[2][0] - Tx*mR1to0.m[2][1];	t2 = ea.x*mAR.m[2][1] + ea.y*mAR.m[2][0] + eb.x*mAR.m[1][2] + eb.y*mAR.m[0][2];	if(GREATER(t, t2))	return FALSE;	// L = A2 x B2
+	}
+	return TRUE;
+}
+
+//! A dedicated version when one box is constant
+inline_ BOOL OBBCollider::BoxBoxOverlap(const Point& extents, const Point& center)
+{
+	// Stats
+	mNbVolumeBVTests++;
+
+	float t,t2;
+
+	// Class I : A's basis vectors
+	float Tx = mTBoxToModel.x - center.x;	t = extents.x + mBBx1;	if(GREATER(Tx, t))	return FALSE;
+	float Ty = mTBoxToModel.y - center.y;	t = extents.y + mBBy1;	if(GREATER(Ty, t))	return FALSE;
+	float Tz = mTBoxToModel.z - center.z;	t = extents.z + mBBz1;	if(GREATER(Tz, t))	return FALSE;
+
+	// Class II : B's basis vectors
+	t = Tx*mRBoxToModel.m[0][0] + Ty*mRBoxToModel.m[0][1] + Tz*mRBoxToModel.m[0][2];
+	t2 = extents.x*mAR.m[0][0] + extents.y*mAR.m[0][1] + extents.z*mAR.m[0][2] + mBoxExtents.x;
+	if(GREATER(t, t2))	return FALSE;
+
+	t = Tx*mRBoxToModel.m[1][0] + Ty*mRBoxToModel.m[1][1] + Tz*mRBoxToModel.m[1][2];
+	t2 = extents.x*mAR.m[1][0] + extents.y*mAR.m[1][1] + extents.z*mAR.m[1][2] + mBoxExtents.y;
+	if(GREATER(t, t2))	return FALSE;
+
+	t = Tx*mRBoxToModel.m[2][0] + Ty*mRBoxToModel.m[2][1] + Tz*mRBoxToModel.m[2][2];
+	t2 = extents.x*mAR.m[2][0] + extents.y*mAR.m[2][1] + extents.z*mAR.m[2][2] + mBoxExtents.z;
+	if(GREATER(t, t2))	return FALSE;
+
+	// Class III : 9 cross products
+	// Cool trick: always perform the full test for first level, regardless of settings.
+	// That way pathological cases (such as the pencils scene) are quickly rejected anyway !
+	if(mFullBoxBoxTest || mNbVolumeBVTests==1)
+	{
+		t = Tz*mRBoxToModel.m[0][1] - Ty*mRBoxToModel.m[0][2];	t2 = extents.y*mAR.m[0][2] + extents.z*mAR.m[0][1] + mBB_1;	if(GREATER(t, t2))	return FALSE;	// L = A0 x B0
+		t = Tz*mRBoxToModel.m[1][1] - Ty*mRBoxToModel.m[1][2];	t2 = extents.y*mAR.m[1][2] + extents.z*mAR.m[1][1] + mBB_2;	if(GREATER(t, t2))	return FALSE;	// L = A0 x B1
+		t = Tz*mRBoxToModel.m[2][1] - Ty*mRBoxToModel.m[2][2];	t2 = extents.y*mAR.m[2][2] + extents.z*mAR.m[2][1] + mBB_3;	if(GREATER(t, t2))	return FALSE;	// L = A0 x B2
+		t = Tx*mRBoxToModel.m[0][2] - Tz*mRBoxToModel.m[0][0];	t2 = extents.x*mAR.m[0][2] + extents.z*mAR.m[0][0] + mBB_4;	if(GREATER(t, t2))	return FALSE;	// L = A1 x B0
+		t = Tx*mRBoxToModel.m[1][2] - Tz*mRBoxToModel.m[1][0];	t2 = extents.x*mAR.m[1][2] + extents.z*mAR.m[1][0] + mBB_5;	if(GREATER(t, t2))	return FALSE;	// L = A1 x B1
+		t = Tx*mRBoxToModel.m[2][2] - Tz*mRBoxToModel.m[2][0];	t2 = extents.x*mAR.m[2][2] + extents.z*mAR.m[2][0] + mBB_6;	if(GREATER(t, t2))	return FALSE;	// L = A1 x B2
+		t = Ty*mRBoxToModel.m[0][0] - Tx*mRBoxToModel.m[0][1];	t2 = extents.x*mAR.m[0][1] + extents.y*mAR.m[0][0] + mBB_7;	if(GREATER(t, t2))	return FALSE;	// L = A2 x B0
+		t = Ty*mRBoxToModel.m[1][0] - Tx*mRBoxToModel.m[1][1];	t2 = extents.x*mAR.m[1][1] + extents.y*mAR.m[1][0] + mBB_8;	if(GREATER(t, t2))	return FALSE;	// L = A2 x B1
+		t = Ty*mRBoxToModel.m[2][0] - Tx*mRBoxToModel.m[2][1];	t2 = extents.x*mAR.m[2][1] + extents.y*mAR.m[2][0] + mBB_9;	if(GREATER(t, t2))	return FALSE;	// L = A2 x B2
+	}
+	return TRUE;
+}
+
+//! A special version for 2 axis-aligned boxes
+inline_ BOOL AABBCollider::AABBAABBOverlap(const Point& extents, const Point& center)
+{
+	// Stats
+	mNbVolumeBVTests++;
+
+	float tx = mBox.mCenter.x - center.x;	float ex = extents.x + mBox.mExtents.x;	if(GREATER(tx, ex))	return FALSE;
+	float ty = mBox.mCenter.y - center.y;	float ey = extents.y + mBox.mExtents.y;	if(GREATER(ty, ey))	return FALSE;
+	float tz = mBox.mCenter.z - center.z;	float ez = extents.z + mBox.mExtents.z;	if(GREATER(tz, ez))	return FALSE;
+
+	return TRUE;
+}