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diff --git a/indra/llmath/m4math.cpp b/indra/llmath/m4math.cpp
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+/**
+ * @file m4math.cpp
+ * @brief LLMatrix4 class implementation.
+ *
+ * Copyright (c) 2000-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#include "linden_common.h"
+
+//#include "vmath.h"
+#include "v3math.h"
+#include "v4math.h"
+#include "m4math.h"
+#include "m3math.h"
+#include "llquaternion.h"
+
+
+
+
+// LLMatrix4
+
+// Constructors
+
+
+LLMatrix4::LLMatrix4(const F32 *mat)
+{
+ mMatrix[0][0] = mat[0];
+ mMatrix[0][1] = mat[1];
+ mMatrix[0][2] = mat[2];
+ mMatrix[0][3] = mat[3];
+
+ mMatrix[1][0] = mat[4];
+ mMatrix[1][1] = mat[5];
+ mMatrix[1][2] = mat[6];
+ mMatrix[1][3] = mat[7];
+
+ mMatrix[2][0] = mat[8];
+ mMatrix[2][1] = mat[9];
+ mMatrix[2][2] = mat[10];
+ mMatrix[2][3] = mat[11];
+
+ mMatrix[3][0] = mat[12];
+ mMatrix[3][1] = mat[13];
+ mMatrix[3][2] = mat[14];
+ mMatrix[3][3] = mat[15];
+}
+
+LLMatrix4::LLMatrix4(const LLMatrix3 &mat, const LLVector4 &vec)
+{
+ mMatrix[0][0] = mat.mMatrix[0][0];
+ mMatrix[0][1] = mat.mMatrix[0][1];
+ mMatrix[0][2] = mat.mMatrix[0][2];
+ mMatrix[0][3] = 0.f;
+
+ mMatrix[1][0] = mat.mMatrix[1][0];
+ mMatrix[1][1] = mat.mMatrix[1][1];
+ mMatrix[1][2] = mat.mMatrix[1][2];
+ mMatrix[1][3] = 0.f;
+
+ mMatrix[2][0] = mat.mMatrix[2][0];
+ mMatrix[2][1] = mat.mMatrix[2][1];
+ mMatrix[2][2] = mat.mMatrix[2][2];
+ mMatrix[2][3] = 0.f;
+
+ mMatrix[3][0] = vec.mV[0];
+ mMatrix[3][1] = vec.mV[1];
+ mMatrix[3][2] = vec.mV[2];
+ mMatrix[3][3] = 1.f;
+}
+
+LLMatrix4::LLMatrix4(const LLMatrix3 &mat)
+{
+ mMatrix[0][0] = mat.mMatrix[0][0];
+ mMatrix[0][1] = mat.mMatrix[0][1];
+ mMatrix[0][2] = mat.mMatrix[0][2];
+ mMatrix[0][3] = 0.f;
+
+ mMatrix[1][0] = mat.mMatrix[1][0];
+ mMatrix[1][1] = mat.mMatrix[1][1];
+ mMatrix[1][2] = mat.mMatrix[1][2];
+ mMatrix[1][3] = 0.f;
+
+ mMatrix[2][0] = mat.mMatrix[2][0];
+ mMatrix[2][1] = mat.mMatrix[2][1];
+ mMatrix[2][2] = mat.mMatrix[2][2];
+ mMatrix[2][3] = 0.f;
+
+ mMatrix[3][0] = 0.f;
+ mMatrix[3][1] = 0.f;
+ mMatrix[3][2] = 0.f;
+ mMatrix[3][3] = 1.f;
+}
+
+LLMatrix4::LLMatrix4(const LLQuaternion &q)
+{
+ *this = initRotation(q);
+}
+
+LLMatrix4::LLMatrix4(const LLQuaternion &q, const LLVector4 &pos)
+{
+ *this = initRotTrans(q, pos);
+}
+
+LLMatrix4::LLMatrix4(const F32 angle, const LLVector4 &vec, const LLVector4 &pos)
+{
+ initRotTrans(LLQuaternion(angle, vec), pos);
+}
+
+LLMatrix4::LLMatrix4(const F32 angle, const LLVector4 &vec)
+{
+ initRotation(LLQuaternion(angle, vec));
+
+ mMatrix[3][0] = 0.f;
+ mMatrix[3][1] = 0.f;
+ mMatrix[3][2] = 0.f;
+ mMatrix[3][3] = 1.f;
+}
+
+LLMatrix4::LLMatrix4(const F32 roll, const F32 pitch, const F32 yaw, const LLVector4 &pos)
+{
+ LLMatrix3 mat(roll, pitch, yaw);
+ initRotTrans(LLQuaternion(mat), pos);
+}
+
+LLMatrix4::LLMatrix4(const F32 roll, const F32 pitch, const F32 yaw)
+{
+ LLMatrix3 mat(roll, pitch, yaw);
+ initRotation(LLQuaternion(mat));
+
+ mMatrix[3][0] = 0.f;
+ mMatrix[3][1] = 0.f;
+ mMatrix[3][2] = 0.f;
+ mMatrix[3][3] = 1.f;
+}
+
+LLMatrix4::~LLMatrix4(void)
+{
+}
+
+// Clear and Assignment Functions
+
+const LLMatrix4& LLMatrix4::zero()
+{
+ mMatrix[0][0] = 0.f;
+ mMatrix[0][1] = 0.f;
+ mMatrix[0][2] = 0.f;
+ mMatrix[0][3] = 0.f;
+
+ mMatrix[1][0] = 0.f;
+ mMatrix[1][1] = 0.f;
+ mMatrix[1][2] = 0.f;
+ mMatrix[1][3] = 0.f;
+
+ mMatrix[2][0] = 0.f;
+ mMatrix[2][1] = 0.f;
+ mMatrix[2][2] = 0.f;
+ mMatrix[2][3] = 0.f;
+
+ mMatrix[3][0] = 0.f;
+ mMatrix[3][1] = 0.f;
+ mMatrix[3][2] = 0.f;
+ mMatrix[3][3] = 0.f;
+ return *this;
+}
+
+
+// various useful mMatrix functions
+
+const LLMatrix4& LLMatrix4::transpose()
+{
+ LLMatrix4 mat;
+ mat.mMatrix[0][0] = mMatrix[0][0];
+ mat.mMatrix[1][0] = mMatrix[0][1];
+ mat.mMatrix[2][0] = mMatrix[0][2];
+ mat.mMatrix[3][0] = mMatrix[0][3];
+
+ mat.mMatrix[0][1] = mMatrix[1][0];
+ mat.mMatrix[1][1] = mMatrix[1][1];
+ mat.mMatrix[2][1] = mMatrix[1][2];
+ mat.mMatrix[3][1] = mMatrix[1][3];
+
+ mat.mMatrix[0][2] = mMatrix[2][0];
+ mat.mMatrix[1][2] = mMatrix[2][1];
+ mat.mMatrix[2][2] = mMatrix[2][2];
+ mat.mMatrix[3][2] = mMatrix[2][3];
+
+ mat.mMatrix[0][3] = mMatrix[3][0];
+ mat.mMatrix[1][3] = mMatrix[3][1];
+ mat.mMatrix[2][3] = mMatrix[3][2];
+ mat.mMatrix[3][3] = mMatrix[3][3];
+
+ *this = mat;
+ return *this;
+}
+
+
+F32 LLMatrix4::determinant() const
+{
+ llerrs << "Not implemented!" << llendl;
+ return 0.f;
+}
+
+// Only works for pure orthonormal, homogeneous transform matrices.
+const LLMatrix4& LLMatrix4::invert(void)
+{
+ // transpose the rotation part
+ F32 temp;
+ temp = mMatrix[VX][VY]; mMatrix[VX][VY] = mMatrix[VY][VX]; mMatrix[VY][VX] = temp;
+ temp = mMatrix[VX][VZ]; mMatrix[VX][VZ] = mMatrix[VZ][VX]; mMatrix[VZ][VX] = temp;
+ temp = mMatrix[VY][VZ]; mMatrix[VY][VZ] = mMatrix[VZ][VY]; mMatrix[VZ][VY] = temp;
+
+ // rotate the translation part by the new rotation
+ // (temporarily store in empty column of matrix)
+ U32 j;
+ for (j=0; j<3; j++)
+ {
+ mMatrix[j][VW] = mMatrix[VW][VX] * mMatrix[VX][j] +
+ mMatrix[VW][VY] * mMatrix[VY][j] +
+ mMatrix[VW][VZ] * mMatrix[VZ][j];
+ }
+
+ // negate and copy the temporary vector back to the tranlation row
+ mMatrix[VW][VX] = -mMatrix[VX][VW];
+ mMatrix[VW][VY] = -mMatrix[VY][VW];
+ mMatrix[VW][VZ] = -mMatrix[VZ][VW];
+
+ // zero the empty column again
+ mMatrix[VX][VW] = mMatrix[VY][VW] = mMatrix[VZ][VW] = 0.0f;
+
+ return *this;
+}
+
+LLVector4 LLMatrix4::getFwdRow4() const
+{
+ return LLVector4(mMatrix[VX][VX], mMatrix[VX][VY], mMatrix[VX][VZ], mMatrix[VX][VW]);
+}
+
+LLVector4 LLMatrix4::getLeftRow4() const
+{
+ return LLVector4(mMatrix[VY][VX], mMatrix[VY][VY], mMatrix[VY][VZ], mMatrix[VY][VW]);
+}
+
+LLVector4 LLMatrix4::getUpRow4() const
+{
+ return LLVector4(mMatrix[VZ][VX], mMatrix[VZ][VY], mMatrix[VZ][VZ], mMatrix[VZ][VW]);
+}
+
+// SJB: This code is correct for a logicly stored (non-transposed) matrix;
+// Our matrices are stored transposed, OpenGL style, so this generates the
+// INVERSE quaternion (-x, -y, -z, w)!
+// Because we use similar logic in LLQuaternion::getMatrix3,
+// we are internally consistant so everything works OK :)
+LLQuaternion LLMatrix4::quaternion() const
+{
+ LLQuaternion quat;
+ F32 tr, s, q[4];
+ U32 i, j, k;
+ U32 nxt[3] = {1, 2, 0};
+
+ tr = mMatrix[0][0] + mMatrix[1][1] + mMatrix[2][2];
+
+ // check the diagonal
+ if (tr > 0.f)
+ {
+ s = (F32)sqrt (tr + 1.f);
+ quat.mQ[VS] = s / 2.f;
+ s = 0.5f / s;
+ quat.mQ[VX] = (mMatrix[1][2] - mMatrix[2][1]) * s;
+ quat.mQ[VY] = (mMatrix[2][0] - mMatrix[0][2]) * s;
+ quat.mQ[VZ] = (mMatrix[0][1] - mMatrix[1][0]) * s;
+ }
+ else
+ {
+ // diagonal is negative
+ i = 0;
+ if (mMatrix[1][1] > mMatrix[0][0])
+ i = 1;
+ if (mMatrix[2][2] > mMatrix[i][i])
+ i = 2;
+
+ j = nxt[i];
+ k = nxt[j];
+
+
+ s = (F32)sqrt ((mMatrix[i][i] - (mMatrix[j][j] + mMatrix[k][k])) + 1.f);
+
+ q[i] = s * 0.5f;
+
+ if (s != 0.f)
+ s = 0.5f / s;
+
+ q[3] = (mMatrix[j][k] - mMatrix[k][j]) * s;
+ q[j] = (mMatrix[i][j] + mMatrix[j][i]) * s;
+ q[k] = (mMatrix[i][k] + mMatrix[k][i]) * s;
+
+ quat.setQuat(q);
+ }
+ return quat;
+}
+
+
+
+void LLMatrix4::initRows(const LLVector4 &row0,
+ const LLVector4 &row1,
+ const LLVector4 &row2,
+ const LLVector4 &row3)
+{
+ mMatrix[0][0] = row0.mV[0];
+ mMatrix[0][1] = row0.mV[1];
+ mMatrix[0][2] = row0.mV[2];
+ mMatrix[0][3] = row0.mV[3];
+
+ mMatrix[1][0] = row1.mV[0];
+ mMatrix[1][1] = row1.mV[1];
+ mMatrix[1][2] = row1.mV[2];
+ mMatrix[1][3] = row1.mV[3];
+
+ mMatrix[2][0] = row2.mV[0];
+ mMatrix[2][1] = row2.mV[1];
+ mMatrix[2][2] = row2.mV[2];
+ mMatrix[2][3] = row2.mV[3];
+
+ mMatrix[3][0] = row3.mV[0];
+ mMatrix[3][1] = row3.mV[1];
+ mMatrix[3][2] = row3.mV[2];
+ mMatrix[3][3] = row3.mV[3];
+}
+
+
+const LLMatrix4& LLMatrix4::initRotation(const F32 angle, const F32 x, const F32 y, const F32 z)
+{
+ LLMatrix3 mat(angle, x, y, z);
+ return initMatrix(mat);
+}
+
+
+const LLMatrix4& LLMatrix4::initRotation(F32 angle, const LLVector4 &vec)
+{
+ LLMatrix3 mat(angle, vec);
+ return initMatrix(mat);
+}
+
+
+const LLMatrix4& LLMatrix4::initRotation(const F32 roll, const F32 pitch, const F32 yaw)
+{
+ LLMatrix3 mat(roll, pitch, yaw);
+ return initMatrix(mat);
+}
+
+
+const LLMatrix4& LLMatrix4::initRotation(const LLQuaternion &q)
+{
+ LLMatrix3 mat(q);
+ return initMatrix(mat);
+}
+
+
+// Position and Rotation
+const LLMatrix4& LLMatrix4::initRotTrans(const F32 angle, const F32 rx, const F32 ry, const F32 rz,
+ const F32 tx, const F32 ty, const F32 tz)
+{
+ LLMatrix3 mat(angle, rx, ry, rz);
+ LLVector3 translation(tx, ty, tz);
+ initMatrix(mat);
+ setTranslation(translation);
+ return (*this);
+}
+
+const LLMatrix4& LLMatrix4::initRotTrans(const F32 angle, const LLVector3 &axis, const LLVector3&translation)
+{
+ LLMatrix3 mat(angle, axis);
+ initMatrix(mat);
+ setTranslation(translation);
+ return (*this);
+}
+
+const LLMatrix4& LLMatrix4::initRotTrans(const F32 roll, const F32 pitch, const F32 yaw, const LLVector4 &translation)
+{
+ LLMatrix3 mat(roll, pitch, yaw);
+ initMatrix(mat);
+ setTranslation(translation);
+ return (*this);
+}
+
+/*
+const LLMatrix4& LLMatrix4::initRotTrans(const LLVector4 &fwd,
+ const LLVector4 &left,
+ const LLVector4 &up,
+ const LLVector4 &translation)
+{
+ LLMatrix3 mat(fwd, left, up);
+ initMatrix(mat);
+ setTranslation(translation);
+ return (*this);
+}
+*/
+
+const LLMatrix4& LLMatrix4::initRotTrans(const LLQuaternion &q, const LLVector4 &translation)
+{
+ LLMatrix3 mat(q);
+ initMatrix(mat);
+ setTranslation(translation);
+ return (*this);
+}
+
+const LLMatrix4& LLMatrix4::initAll(const LLVector3 &scale, const LLQuaternion &q, const LLVector3 &pos)
+{
+ F32 sx, sy, sz;
+ F32 xx, xy, xz, xw, yy, yz, yw, zz, zw;
+
+ sx = scale.mV[0];
+ sy = scale.mV[1];
+ sz = scale.mV[2];
+
+ xx = q.mQ[VX] * q.mQ[VX];
+ xy = q.mQ[VX] * q.mQ[VY];
+ xz = q.mQ[VX] * q.mQ[VZ];
+ xw = q.mQ[VX] * q.mQ[VW];
+
+ yy = q.mQ[VY] * q.mQ[VY];
+ yz = q.mQ[VY] * q.mQ[VZ];
+ yw = q.mQ[VY] * q.mQ[VW];
+
+ zz = q.mQ[VZ] * q.mQ[VZ];
+ zw = q.mQ[VZ] * q.mQ[VW];
+
+ mMatrix[0][0] = (1.f - 2.f * ( yy + zz )) *sx;
+ mMatrix[0][1] = ( 2.f * ( xy + zw )) *sx;
+ mMatrix[0][2] = ( 2.f * ( xz - yw )) *sx;
+
+ mMatrix[1][0] = ( 2.f * ( xy - zw )) *sy;
+ mMatrix[1][1] = (1.f - 2.f * ( xx + zz )) *sy;
+ mMatrix[1][2] = ( 2.f * ( yz + xw )) *sy;
+
+ mMatrix[2][0] = ( 2.f * ( xz + yw )) *sz;
+ mMatrix[2][1] = ( 2.f * ( yz - xw )) *sz;
+ mMatrix[2][2] = (1.f - 2.f * ( xx + yy )) *sz;
+
+ mMatrix[3][0] = pos.mV[0];
+ mMatrix[3][1] = pos.mV[1];
+ mMatrix[3][2] = pos.mV[2];
+ mMatrix[3][3] = 1.0;
+
+ // TODO -- should we set the translation portion to zero?
+ return (*this);
+}
+
+// Rotate exisitng mMatrix
+const LLMatrix4& LLMatrix4::rotate(const F32 angle, const F32 x, const F32 y, const F32 z)
+{
+ LLVector4 vec4(x, y, z);
+ LLMatrix4 mat(angle, vec4);
+ *this *= mat;
+ return *this;
+}
+
+const LLMatrix4& LLMatrix4::rotate(const F32 angle, const LLVector4 &vec)
+{
+ LLMatrix4 mat(angle, vec);
+ *this *= mat;
+ return *this;
+}
+
+const LLMatrix4& LLMatrix4::rotate(const F32 roll, const F32 pitch, const F32 yaw)
+{
+ LLMatrix4 mat(roll, pitch, yaw);
+ *this *= mat;
+ return *this;
+}
+
+const LLMatrix4& LLMatrix4::rotate(const LLQuaternion &q)
+{
+ LLMatrix4 mat(q);
+ *this *= mat;
+ return *this;
+}
+
+
+const LLMatrix4& LLMatrix4::translate(const LLVector3 &vec)
+{
+ mMatrix[3][0] += vec.mV[0];
+ mMatrix[3][1] += vec.mV[1];
+ mMatrix[3][2] += vec.mV[2];
+ return (*this);
+}
+
+
+void LLMatrix4::setFwdRow(const LLVector3 &row)
+{
+ mMatrix[VX][VX] = row.mV[VX];
+ mMatrix[VX][VY] = row.mV[VY];
+ mMatrix[VX][VZ] = row.mV[VZ];
+}
+
+void LLMatrix4::setLeftRow(const LLVector3 &row)
+{
+ mMatrix[VY][VX] = row.mV[VX];
+ mMatrix[VY][VY] = row.mV[VY];
+ mMatrix[VY][VZ] = row.mV[VZ];
+}
+
+void LLMatrix4::setUpRow(const LLVector3 &row)
+{
+ mMatrix[VZ][VX] = row.mV[VX];
+ mMatrix[VZ][VY] = row.mV[VY];
+ mMatrix[VZ][VZ] = row.mV[VZ];
+}
+
+
+void LLMatrix4::setFwdCol(const LLVector3 &col)
+{
+ mMatrix[VX][VX] = col.mV[VX];
+ mMatrix[VY][VX] = col.mV[VY];
+ mMatrix[VZ][VX] = col.mV[VZ];
+}
+
+void LLMatrix4::setLeftCol(const LLVector3 &col)
+{
+ mMatrix[VX][VY] = col.mV[VX];
+ mMatrix[VY][VY] = col.mV[VY];
+ mMatrix[VZ][VY] = col.mV[VZ];
+}
+
+void LLMatrix4::setUpCol(const LLVector3 &col)
+{
+ mMatrix[VX][VZ] = col.mV[VX];
+ mMatrix[VY][VZ] = col.mV[VY];
+ mMatrix[VZ][VZ] = col.mV[VZ];
+}
+
+
+const LLMatrix4& LLMatrix4::setTranslation(const F32 tx, const F32 ty, const F32 tz)
+{
+ mMatrix[VW][VX] = tx;
+ mMatrix[VW][VY] = ty;
+ mMatrix[VW][VZ] = tz;
+ return (*this);
+}
+
+const LLMatrix4& LLMatrix4::setTranslation(const LLVector3 &translation)
+{
+ mMatrix[VW][VX] = translation.mV[VX];
+ mMatrix[VW][VY] = translation.mV[VY];
+ mMatrix[VW][VZ] = translation.mV[VZ];
+ return (*this);
+}
+
+const LLMatrix4& LLMatrix4::setTranslation(const LLVector4 &translation)
+{
+ mMatrix[VW][VX] = translation.mV[VX];
+ mMatrix[VW][VY] = translation.mV[VY];
+ mMatrix[VW][VZ] = translation.mV[VZ];
+ return (*this);
+}
+
+// LLMatrix3 Extraction and Setting
+LLMatrix3 LLMatrix4::getMat3() const
+{
+ LLMatrix3 retmat;
+
+ retmat.mMatrix[0][0] = mMatrix[0][0];
+ retmat.mMatrix[0][1] = mMatrix[0][1];
+ retmat.mMatrix[0][2] = mMatrix[0][2];
+
+ retmat.mMatrix[1][0] = mMatrix[1][0];
+ retmat.mMatrix[1][1] = mMatrix[1][1];
+ retmat.mMatrix[1][2] = mMatrix[1][2];
+
+ retmat.mMatrix[2][0] = mMatrix[2][0];
+ retmat.mMatrix[2][1] = mMatrix[2][1];
+ retmat.mMatrix[2][2] = mMatrix[2][2];
+
+ return retmat;
+}
+
+const LLMatrix4& LLMatrix4::initMatrix(const LLMatrix3 &mat)
+{
+ mMatrix[0][0] = mat.mMatrix[0][0];
+ mMatrix[0][1] = mat.mMatrix[0][1];
+ mMatrix[0][2] = mat.mMatrix[0][2];
+ mMatrix[0][3] = 0.f;
+
+ mMatrix[1][0] = mat.mMatrix[1][0];
+ mMatrix[1][1] = mat.mMatrix[1][1];
+ mMatrix[1][2] = mat.mMatrix[1][2];
+ mMatrix[1][3] = 0.f;
+
+ mMatrix[2][0] = mat.mMatrix[2][0];
+ mMatrix[2][1] = mat.mMatrix[2][1];
+ mMatrix[2][2] = mat.mMatrix[2][2];
+ mMatrix[2][3] = 0.f;
+
+ mMatrix[3][0] = 0.f;
+ mMatrix[3][1] = 0.f;
+ mMatrix[3][2] = 0.f;
+ mMatrix[3][3] = 1.f;
+ return (*this);
+}
+
+const LLMatrix4& LLMatrix4::initMatrix(const LLMatrix3 &mat, const LLVector4 &translation)
+{
+ mMatrix[0][0] = mat.mMatrix[0][0];
+ mMatrix[0][1] = mat.mMatrix[0][1];
+ mMatrix[0][2] = mat.mMatrix[0][2];
+ mMatrix[0][3] = 0.f;
+
+ mMatrix[1][0] = mat.mMatrix[1][0];
+ mMatrix[1][1] = mat.mMatrix[1][1];
+ mMatrix[1][2] = mat.mMatrix[1][2];
+ mMatrix[1][3] = 0.f;
+
+ mMatrix[2][0] = mat.mMatrix[2][0];
+ mMatrix[2][1] = mat.mMatrix[2][1];
+ mMatrix[2][2] = mat.mMatrix[2][2];
+ mMatrix[2][3] = 0.f;
+
+ mMatrix[3][0] = translation.mV[0];
+ mMatrix[3][1] = translation.mV[1];
+ mMatrix[3][2] = translation.mV[2];
+ mMatrix[3][3] = 1.f;
+ return (*this);
+}
+
+// LLMatrix4 Operators
+
+
+/* Not implemented to help enforce code consistency with the syntax of
+ row-major notation. This is a Good Thing.
+LLVector4 operator*(const LLMatrix4 &a, const LLVector4 &b)
+{
+ // Operate "to the right" on column-vector b
+ LLVector4 vec;
+ vec.mV[VX] = a.mMatrix[VX][VX] * b.mV[VX] +
+ a.mMatrix[VY][VX] * b.mV[VY] +
+ a.mMatrix[VZ][VX] * b.mV[VZ] +
+ a.mMatrix[VW][VX] * b.mV[VW];
+
+ vec.mV[VY] = a.mMatrix[VX][VY] * b.mV[VX] +
+ a.mMatrix[VY][VY] * b.mV[VY] +
+ a.mMatrix[VZ][VY] * b.mV[VZ] +
+ a.mMatrix[VW][VY] * b.mV[VW];
+
+ vec.mV[VZ] = a.mMatrix[VX][VZ] * b.mV[VX] +
+ a.mMatrix[VY][VZ] * b.mV[VY] +
+ a.mMatrix[VZ][VZ] * b.mV[VZ] +
+ a.mMatrix[VW][VZ] * b.mV[VW];
+
+ vec.mV[VW] = a.mMatrix[VX][VW] * b.mV[VX] +
+ a.mMatrix[VY][VW] * b.mV[VY] +
+ a.mMatrix[VZ][VW] * b.mV[VZ] +
+ a.mMatrix[VW][VW] * b.mV[VW];
+ return vec;
+}
+*/
+
+
+LLVector4 operator*(const LLVector4 &a, const LLMatrix4 &b)
+{
+ // Operate "to the left" on row-vector a
+ LLVector4 vec;
+ vec.mV[VX] = a.mV[VX] * b.mMatrix[VX][VX] +
+ a.mV[VY] * b.mMatrix[VY][VX] +
+ a.mV[VZ] * b.mMatrix[VZ][VX] +
+ a.mV[VW] * b.mMatrix[VW][VX];
+
+ vec.mV[VY] = a.mV[VX] * b.mMatrix[VX][VY] +
+ a.mV[VY] * b.mMatrix[VY][VY] +
+ a.mV[VZ] * b.mMatrix[VZ][VY] +
+ a.mV[VW] * b.mMatrix[VW][VY];
+
+ vec.mV[VZ] = a.mV[VX] * b.mMatrix[VX][VZ] +
+ a.mV[VY] * b.mMatrix[VY][VZ] +
+ a.mV[VZ] * b.mMatrix[VZ][VZ] +
+ a.mV[VW] * b.mMatrix[VW][VZ];
+
+ vec.mV[VW] = a.mV[VX] * b.mMatrix[VX][VW] +
+ a.mV[VY] * b.mMatrix[VY][VW] +
+ a.mV[VZ] * b.mMatrix[VZ][VW] +
+ a.mV[VW] * b.mMatrix[VW][VW];
+ return vec;
+}
+
+LLVector4 rotate_vector(const LLVector4 &a, const LLMatrix4 &b)
+{
+ // Rotates but does not translate
+ // Operate "to the left" on row-vector a
+ LLVector4 vec;
+ vec.mV[VX] = a.mV[VX] * b.mMatrix[VX][VX] +
+ a.mV[VY] * b.mMatrix[VY][VX] +
+ a.mV[VZ] * b.mMatrix[VZ][VX];
+
+ vec.mV[VY] = a.mV[VX] * b.mMatrix[VX][VY] +
+ a.mV[VY] * b.mMatrix[VY][VY] +
+ a.mV[VZ] * b.mMatrix[VZ][VY];
+
+ vec.mV[VZ] = a.mV[VX] * b.mMatrix[VX][VZ] +
+ a.mV[VY] * b.mMatrix[VY][VZ] +
+ a.mV[VZ] * b.mMatrix[VZ][VZ];
+
+// vec.mV[VW] = a.mV[VX] * b.mMatrix[VX][VW] +
+// a.mV[VY] * b.mMatrix[VY][VW] +
+// a.mV[VZ] * b.mMatrix[VZ][VW] +
+ vec.mV[VW] = a.mV[VW];
+ return vec;
+}
+
+LLVector3 rotate_vector(const LLVector3 &a, const LLMatrix4 &b)
+{
+ // Rotates but does not translate
+ // Operate "to the left" on row-vector a
+ LLVector3 vec;
+ vec.mV[VX] = a.mV[VX] * b.mMatrix[VX][VX] +
+ a.mV[VY] * b.mMatrix[VY][VX] +
+ a.mV[VZ] * b.mMatrix[VZ][VX];
+
+ vec.mV[VY] = a.mV[VX] * b.mMatrix[VX][VY] +
+ a.mV[VY] * b.mMatrix[VY][VY] +
+ a.mV[VZ] * b.mMatrix[VZ][VY];
+
+ vec.mV[VZ] = a.mV[VX] * b.mMatrix[VX][VZ] +
+ a.mV[VY] * b.mMatrix[VY][VZ] +
+ a.mV[VZ] * b.mMatrix[VZ][VZ];
+ return vec;
+}
+
+bool operator==(const LLMatrix4 &a, const LLMatrix4 &b)
+{
+ U32 i, j;
+ for (i = 0; i < NUM_VALUES_IN_MAT4; i++)
+ {
+ for (j = 0; j < NUM_VALUES_IN_MAT4; j++)
+ {
+ if (a.mMatrix[j][i] != b.mMatrix[j][i])
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+bool operator!=(const LLMatrix4 &a, const LLMatrix4 &b)
+{
+ U32 i, j;
+ for (i = 0; i < NUM_VALUES_IN_MAT4; i++)
+ {
+ for (j = 0; j < NUM_VALUES_IN_MAT4; j++)
+ {
+ if (a.mMatrix[j][i] != b.mMatrix[j][i])
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+const LLMatrix4& operator*=(LLMatrix4 &a, F32 k)
+{
+ U32 i, j;
+ for (i = 0; i < NUM_VALUES_IN_MAT4; i++)
+ {
+ for (j = 0; j < NUM_VALUES_IN_MAT4; j++)
+ {
+ a.mMatrix[j][i] *= k;
+ }
+ }
+ return a;
+}
+
+std::ostream& operator<<(std::ostream& s, const LLMatrix4 &a)
+{
+ s << "{ "
+ << a.mMatrix[VX][VX] << ", "
+ << a.mMatrix[VX][VY] << ", "
+ << a.mMatrix[VX][VZ] << ", "
+ << a.mMatrix[VX][VW]
+ << "; "
+ << a.mMatrix[VY][VX] << ", "
+ << a.mMatrix[VY][VY] << ", "
+ << a.mMatrix[VY][VZ] << ", "
+ << a.mMatrix[VY][VW]
+ << "; "
+ << a.mMatrix[VZ][VX] << ", "
+ << a.mMatrix[VZ][VY] << ", "
+ << a.mMatrix[VZ][VZ] << ", "
+ << a.mMatrix[VZ][VW]
+ << "; "
+ << a.mMatrix[VW][VX] << ", "
+ << a.mMatrix[VW][VY] << ", "
+ << a.mMatrix[VW][VZ] << ", "
+ << a.mMatrix[VW][VW]
+ << " }";
+ return s;
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-08 12:05:31 +0000