Imported existing code

indra/llmath/v4math.cpp

@@ -0,0 +1,148 @@
+/** 
+ * @file v4math.cpp
+ * @brief LLVector4 class implementation.
+ *
+ * $LicenseInfo:firstyear=2000&license=viewergpl$
+ * 
+ * Copyright (c) 2000-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+//#include "vmath.h"
+#include "v3math.h"
+#include "v4math.h"
+#include "m4math.h"
+#include "m3math.h"
+#include "llquaternion.h"
+
+// LLVector4
+
+// Axis-Angle rotations
+
+/*
+const LLVector4&	LLVector4::rotVec(F32 angle, const LLVector4 &vec)
+{
+	if ( !vec.isExactlyZero() && angle )
+	{
+		*this = *this * LLMatrix4(angle, vec);
+	}
+	return *this;
+}
+
+const LLVector4&	LLVector4::rotVec(F32 angle, F32 x, F32 y, F32 z)
+{
+	LLVector3 vec(x, y, z);
+	if ( !vec.isExactlyZero() && angle )
+	{
+		*this = *this * LLMatrix4(angle, vec);
+	}
+	return *this;
+}
+*/
+
+const LLVector4&	LLVector4::rotVec(const LLMatrix4 &mat)
+{
+	*this = *this * mat;
+	return *this;
+}
+
+const LLVector4&	LLVector4::rotVec(const LLQuaternion &q)
+{
+	*this = *this * q;
+	return *this;
+}
+
+const LLVector4&	LLVector4::scaleVec(const LLVector4& vec)
+{
+	mV[VX] *= vec.mV[VX];
+	mV[VY] *= vec.mV[VY];
+	mV[VZ] *= vec.mV[VZ];
+	mV[VW] *= vec.mV[VW];
+
+	return *this;
+}
+
+// Sets all values to absolute value of their original values
+// Returns TRUE if data changed
+BOOL LLVector4::abs()
+{
+	BOOL ret = FALSE;
+
+	if (mV[0] < 0.f) { mV[0] = -mV[0]; ret = TRUE; }
+	if (mV[1] < 0.f) { mV[1] = -mV[1]; ret = TRUE; }
+	if (mV[2] < 0.f) { mV[2] = -mV[2]; ret = TRUE; }
+	if (mV[3] < 0.f) { mV[3] = -mV[3]; ret = TRUE; }
+
+	return ret;
+}
+
+
+std::ostream& operator<<(std::ostream& s, const LLVector4 &a) 
+{
+	s << "{ " << a.mV[VX] << ", " << a.mV[VY] << ", " << a.mV[VZ] << ", " << a.mV[VW] << " }";
+	return s;
+}
+
+
+// Non-member functions
+
+F32 angle_between( const LLVector4& a, const LLVector4& b )
+{
+	LLVector4 an = a;
+	LLVector4 bn = b;
+	an.normalize();
+	bn.normalize();
+	F32 cosine = an * bn;
+	F32 angle = (cosine >= 1.0f) ? 0.0f :
+		(cosine <= -1.0f) ? F_PI :
+		acos(cosine);
+	return angle;
+}
+
+BOOL are_parallel(const LLVector4 &a, const LLVector4 &b, F32 epsilon)
+{
+	LLVector4 an = a;
+	LLVector4 bn = b;
+	an.normalize();
+	bn.normalize();
+	F32 dot = an * bn;
+	if ( (1.0f - fabs(dot)) < epsilon)
+		return TRUE;
+	return FALSE;
+}
+
+
+LLVector3 vec4to3(const LLVector4 &vec)
+{
+	return LLVector3( vec.mV[VX], vec.mV[VY], vec.mV[VZ] );
+}
+
+LLVector4 vec3to4(const LLVector3 &vec)
+{
+	return LLVector4(vec.mV[VX], vec.mV[VY], vec.mV[VZ]);
+}
+