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#pragma once
class CMatrix
{
public:
RwMatrix m_matrix;
RwMatrix *m_attachment;
bool m_hasRwMatrix; // are we the owner?
CMatrix(void){
m_attachment = nil;
m_hasRwMatrix = false;
}
CMatrix(CMatrix const &m){
m_attachment = nil;
m_hasRwMatrix = false;
*this = m;
}
CMatrix(RwMatrix *matrix, bool attach){
m_attachment = nil;
Attach(matrix, attach);
}
~CMatrix(void){
if(m_hasRwMatrix && m_attachment)
RwMatrixDestroy(m_attachment);
}
void Attach(RwMatrix *matrix, bool attach){
if(m_hasRwMatrix && m_attachment)
RwMatrixDestroy(m_attachment);
m_attachment = matrix;
m_hasRwMatrix = attach;
Update();
}
void AttachRW(RwMatrix *matrix, bool attach){
if(m_hasRwMatrix && m_attachment)
RwMatrixDestroy(m_attachment);
m_attachment = matrix;
m_hasRwMatrix = attach;
UpdateRW();
}
void Detach(void){
if(m_hasRwMatrix && m_attachment)
RwMatrixDestroy(m_attachment);
m_attachment = nil;
}
void Update(void){
m_matrix = *m_attachment;
}
void UpdateRW(void){
if(m_attachment){
*m_attachment = m_matrix;
RwMatrixUpdate(m_attachment);
}
}
void operator=(CMatrix const &rhs){
m_matrix = rhs.m_matrix;
if(m_attachment)
UpdateRW();
}
CVector *GetPosition(void){ return (CVector*)&m_matrix.pos; }
CVector *GetRight(void) { return (CVector*)&m_matrix.right; }
CVector *GetForward(void) { return (CVector*)&m_matrix.up; }
CVector *GetUp(void) { return (CVector*)&m_matrix.at; }
void SetScale(float s){
m_matrix.right.x = s;
m_matrix.right.y = 0.0f;
m_matrix.right.z = 0.0f;
m_matrix.up.x = 0.0f;
m_matrix.up.y = s;
m_matrix.up.z = 0.0f;
m_matrix.at.x = 0.0f;
m_matrix.at.y = 0.0f;
m_matrix.at.z = s;
m_matrix.pos.x = 0.0f;
m_matrix.pos.y = 0.0f;
m_matrix.pos.z = 0.0f;
}
void SetRotateXOnly(float angle){
float c = cos(angle);
float s = sin(angle);
m_matrix.right.x = 1.0f;
m_matrix.right.y = 0.0f;
m_matrix.right.z = 0.0f;
m_matrix.up.x = 0.0f;
m_matrix.up.y = c;
m_matrix.up.z = s;
m_matrix.at.x = 0.0f;
m_matrix.at.y = -s;
m_matrix.at.z = c;
}
void SetRotateX(float angle){
SetRotateXOnly(angle);
m_matrix.pos.x = 0.0f;
m_matrix.pos.y = 0.0f;
m_matrix.pos.z = 0.0f;
}
void SetRotateYOnly(float angle){
float c = cos(angle);
float s = sin(angle);
m_matrix.right.x = c;
m_matrix.right.y = 0.0f;
m_matrix.right.z = -s;
m_matrix.up.x = 0.0f;
m_matrix.up.y = 1.0f;
m_matrix.up.z = 0.0f;
m_matrix.at.x = s;
m_matrix.at.y = 0.0f;
m_matrix.at.z = c;
}
void SetRotateY(float angle){
SetRotateYOnly(angle);
m_matrix.pos.x = 0.0f;
m_matrix.pos.y = 0.0f;
m_matrix.pos.z = 0.0f;
}
void SetRotateZOnly(float angle){
float c = cos(angle);
float s = sin(angle);
m_matrix.right.x = c;
m_matrix.right.y = s;
m_matrix.right.z = 0.0f;
m_matrix.up.x = -s;
m_matrix.up.y = c;
m_matrix.up.z = 0.0f;
m_matrix.at.x = 0.0f;
m_matrix.at.y = 0.0f;
m_matrix.at.z = 1.0f;
}
void SetRotateZ(float angle){
SetRotateZOnly(angle);
m_matrix.pos.x = 0.0f;
m_matrix.pos.y = 0.0f;
m_matrix.pos.z = 0.0f;
}
void Reorthogonalise(void){
CVector &r = *GetRight();
CVector &f = *GetForward();
CVector &u = *GetUp();
u = CrossProduct(r, f);
u.Normalise();
r = CrossProduct(f, u);
r.Normalise();
f = CrossProduct(u, r);
}
};
inline CMatrix&
Invert(const CMatrix &src, CMatrix &dst)
{
// GTA handles this as a raw 4x4 orthonormal matrix
// and trashes the RW flags, let's not do that
// actual copy of librw code:
RwMatrix *d = &dst.m_matrix;
const RwMatrix *s = &src.m_matrix;
d->right.x = s->right.x;
d->right.y = s->up.x;
d->right.z = s->at.x;
d->up.x = s->right.y;
d->up.y = s->up.y;
d->up.z = s->at.y;
d->at.x = s->right.z;
d->at.y = s->up.z;
d->at.z = s->at.z;
d->pos.x = -(s->pos.x*s->right.x +
s->pos.y*s->right.y +
s->pos.z*s->right.z);
d->pos.y = -(s->pos.x*s->up.x +
s->pos.y*s->up.y +
s->pos.z*s->up.z);
d->pos.z = -(s->pos.x*s->at.x +
s->pos.y*s->at.y +
s->pos.z*s->at.z);
d->flags = rwMATRIXTYPEORTHONORMAL;
return dst;
}
inline CMatrix
Invert(const CMatrix &matrix)
{
CMatrix inv;
return Invert(matrix, inv);
}
inline CVector
operator*(const CMatrix &mat, const CVector &vec)
{
return CVector(
mat.m_matrix.right.x * vec.x + mat.m_matrix.up.x * vec.y + mat.m_matrix.at.x * vec.z + mat.m_matrix.pos.x,
mat.m_matrix.right.y * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.at.y * vec.z + mat.m_matrix.pos.y,
mat.m_matrix.right.z * vec.x + mat.m_matrix.up.z * vec.y + mat.m_matrix.at.z * vec.z + mat.m_matrix.pos.z);
}
inline CMatrix
operator*(const CMatrix &m1, const CMatrix &m2)
{
CMatrix out;
RwMatrix *dst = &out.m_matrix;
const RwMatrix *src1 = &m1.m_matrix;
const RwMatrix *src2 = &m2.m_matrix;
dst->right.x = src1->right.x*src2->right.x + src1->up.x*src2->right.y + src1->at.x*src2->right.z;
dst->right.y = src1->right.y*src2->right.x + src1->up.y*src2->right.y + src1->at.y*src2->right.z;
dst->right.z = src1->right.z*src2->right.x + src1->up.z*src2->right.y + src1->at.z*src2->right.z;
dst->up.x = src1->right.x*src2->up.x + src1->up.x*src2->up.y + src1->at.x*src2->up.z;
dst->up.y = src1->right.y*src2->up.x + src1->up.y*src2->up.y + src1->at.y*src2->up.z;
dst->up.z = src1->right.z*src2->up.x + src1->up.z*src2->up.y + src1->at.z*src2->up.z;
dst->at.x = src1->right.x*src2->at.x + src1->up.x*src2->at.y + src1->at.x*src2->at.z;
dst->at.y = src1->right.y*src2->at.x + src1->up.y*src2->at.y + src1->at.y*src2->at.z;
dst->at.z = src1->right.z*src2->at.x + src1->up.z*src2->at.y + src1->at.z*src2->at.z;
dst->pos.x = src1->right.x*src2->pos.x + src1->up.x*src2->pos.y + src1->at.x*src2->pos.z + src1->pos.x;
dst->pos.y = src1->right.y*src2->pos.x + src1->up.y*src2->pos.y + src1->at.y*src2->pos.z + src1->pos.y;
dst->pos.z = src1->right.z*src2->pos.x + src1->up.z*src2->pos.y + src1->at.z*src2->pos.z + src1->pos.z;
return out;
}
inline CVector
MultiplyInverse(const CMatrix &mat, const CVector &vec)
{
CVector v(vec.x - mat.m_matrix.pos.x, vec.y - mat.m_matrix.pos.y, vec.z - mat.m_matrix.pos.z);
return CVector(
mat.m_matrix.right.x * v.x + mat.m_matrix.right.y * v.y + mat.m_matrix.right.z * v.z,
mat.m_matrix.up.x * v.x + mat.m_matrix.up.y * v.y + mat.m_matrix.up.z * v.z,
mat.m_matrix.at.x * v.x + mat.m_matrix.at.y * v.y + mat.m_matrix.at.z * v.z);
}
inline CVector
Multiply3x3(const CMatrix &mat, const CVector &vec)
{
return CVector(
mat.m_matrix.right.x * vec.x + mat.m_matrix.up.x * vec.y + mat.m_matrix.at.x * vec.z,
mat.m_matrix.right.y * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.at.y * vec.z,
mat.m_matrix.right.z * vec.x + mat.m_matrix.up.z * vec.y + mat.m_matrix.at.z * vec.z);
}
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