void Face_GetScale_BrushPrimit(face_t *face, float *s, float *t, float *rot) {
idVec3D texS, texT;
ComputeAxisBase(face->plane.Normal(), texS, texT);
if (face == NULL || face->face_winding == NULL) {
return;
}
// find ST coordinates for the center of the face
double Os = 0, Ot = 0;
for (int i = 0; i < face->face_winding->GetNumPoints(); i++) {
Os += DotProduct((*face->face_winding)[i], texS);
Ot += DotProduct((*face->face_winding)[i], texT);
}
Os /= face->face_winding->GetNumPoints();
Ot /= face->face_winding->GetNumPoints();
brushprimit_texdef_t *pBP = &face->brushprimit_texdef;
// here we have a special case, M is a translation and it's inverse is easy
float BPO[2][3];
float aux[2][3];
float m[2][3];
memset(&m, 0, sizeof (float) *6);
m[0][0] = 1;
m[1][1] = 1;
m[0][2] = -Os;
m[1][2] = -Ot;
BPMatMul(m, pBP->coords, aux);
m[0][2] = Os;
m[1][2] = Ot; // now M^-1
BPMatMul(aux, m, BPO);
// apply a given scale (on S and T)
ConvertTexMatWithQTexture(BPO, face->d_texture, aux, NULL);
*s = idMath::Sqrt(aux[0][0] * aux[0][0] + aux[1][0] * aux[1][0]);
*t = idMath::Sqrt(aux[0][1] * aux[0][1] + aux[1][1] * aux[1][1]);
// compute rotate value
if (idMath::Fabs(face->brushprimit_texdef.coords[0][0]) < ZERO_EPSILON)
{
// rotate is +-90
if (face->brushprimit_texdef.coords[1][0] > 0) {
*rot = 90.0f;
}
else {
*rot = -90.0f;
}
}
else {
*rot = RAD2DEG(atan2(face->brushprimit_texdef.coords[1][0] / (*s) ? (*s) : 1.0f, face->brushprimit_texdef.coords[0][0] / (*t) ? (*t) : 1.0f));
}
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void BPMatRotate(float A[2][3], float theta) {
float m[2][3];
float aux[2][3];
memset(&m, 0, sizeof (float) *6);
m[0][0] = cos( DEG2RAD( theta ) );
m[0][1] = -sin( DEG2RAD( theta ) );
m[1][0] = -m[0][1];
m[1][1] = m[0][0];
BPMatMul(A, m, aux);
BPMatCopy(aux, A);
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void Face_SetExplicitScale_BrushPrimit(face_t *face, float s, float t) {
idVec3D texS, texT;
ComputeAxisBase(face->plane.Normal(), texS, texT);
// find ST coordinates for the center of the face
double Os = 0, Ot = 0;
for (int i = 0; i < face->face_winding->GetNumPoints(); i++) {
Os += DotProduct((*face->face_winding)[i], texS);
Ot += DotProduct((*face->face_winding)[i], texT);
}
Os /= face->face_winding->GetNumPoints();
Ot /= face->face_winding->GetNumPoints();
brushprimit_texdef_t *pBP = &face->brushprimit_texdef;
// here we have a special case, M is a translation and it's inverse is easy
float BPO[2][3];
float aux[2][3];
float m[2][3];
memset(&m, 0, sizeof (float) *6);
m[0][0] = 1;
m[1][1] = 1;
m[0][2] = -Os;
m[1][2] = -Ot;
BPMatMul(m, pBP->coords, aux);
m[0][2] = Os;
m[1][2] = Ot; // now M^-1
BPMatMul(aux, m, BPO);
// apply a given scale (on S and T)
ConvertTexMatWithQTexture(BPO, face->d_texture, aux, NULL);
// reset the scale (normalize the matrix)
double v1, v2;
v1 = idMath::Sqrt(aux[0][0] * aux[0][0] + aux[1][0] * aux[1][0]);
v2 = idMath::Sqrt(aux[0][1] * aux[0][1] + aux[1][1] * aux[1][1]);
if (s == 0.0) {
s = v1;
}
if (t == 0.0) {
t = v2;
}
double sS, sT;
// put the values for scale on S and T here:
sS = s / v1;
sT = t / v2;
aux[0][0] *= sS;
aux[1][0] *= sS;
aux[0][1] *= sT;
aux[1][1] *= sT;
ConvertTexMatWithQTexture(aux, NULL, BPO, face->d_texture);
BPMatMul(m, BPO, aux); // m is M^-1
m[0][2] = -Os;
m[1][2] = -Ot;
BPMatMul(aux, m, pBP->coords);
// now emit the coordinates on the winding
EmitBrushPrimitTextureCoordinates(face, face->face_winding);
}
// experimental stuff, work directly on BP
static void OnTest( GtkWidget *widget, gpointer data ){
if ( !g_qeglobals.m_bBrushPrimitMode ) {
Sys_FPrintf( SYS_WRN, "BP mode required\n" );
return;
}
if ( g_ptrSelectedFaces.GetSize() != 1 ) {
Sys_FPrintf( SYS_WRN, "Expected single face selection\n" );
return;
}
brush_t *b = reinterpret_cast<brush_t*>( g_ptrSelectedFaceBrushes.GetAt( 0 ) );
face_t *selFace = reinterpret_cast<face_t*>( g_ptrSelectedFaces.GetAt( 0 ) );
// get the ST axis base for the face
vec3_t texS,texT;
ComputeAxisBase( selFace->plane.normal, texS, texT );
// find ST coordinates for the center of the face
float Os = 0,Ot = 0;
int i;
for ( i = 0; i < selFace->face_winding->numpoints; i++ )
{
Os += DotProduct( selFace->face_winding->points[i],texS );
Ot += DotProduct( selFace->face_winding->points[i],texT );
}
Os /= selFace->face_winding->numpoints;
Ot /= selFace->face_winding->numpoints;
brushprimit_texdef_t *pBP = &selFace->brushprimit_texdef;
// (FIXME: initial version, before axis base change optimize)
// we need to compute our BP matrix in this new axis base (O,texS,texT)
// the general case if BPO = M * BP * M^-1
// where BPO is transformation expressed in (O,texS,texT)
// M is the axis base change from (origin,texS,texT) to (O,texS,texT)
// here we have a special case, M is a translation and it's inverse is easy
vec_t BPO[2][3];
vec_t aux[2][3];
vec_t m[2][3];
memset( &m, 0, sizeof( vec_t ) * 6 );
m[0][0] = 1; m[1][1] = 1; m[0][2] = -Os; m[1][2] = -Ot;
BPMatMul( m, pBP->coords, aux );
m[0][2] = Os; m[1][2] = Ot; // now M^-1
BPMatMul( aux, m, BPO );
#if 0
// apply a scaling
// scale factors against S and T axis, we apply on top of the existing matrix
// <1 will decrease the texel/world resolution, >1 will increase
float sS = 1.025,sT = 1.025;
BPMatScale( BPO,sS,sT );
#endif
#if 0
// apply a rotation
float theta = 5;
BPMatRotate( BPO,theta );
#endif
#if 0
// read the scale
ConvertTexMatWithQTexture( BPO, selFace->d_texture, aux, NULL );
// reset the scale (normalize the matrix)
vec_t v1,v2;
v1 = sqrt( aux[0][0] * aux[0][0] + aux[1][0] * aux[1][0] );
v2 = sqrt( aux[0][1] * aux[0][1] + aux[1][1] * aux[1][1] );
// if reading the scale values, we have them here:
Sys_Printf( "Current Scale: S: %g T: %g\n", v1, v2 );
return;
#endif
#if 1
// apply a given scale (on S and T)
ConvertTexMatWithQTexture( BPO, selFace->d_texture, aux, NULL );
// reset the scale (normalize the matrix)
vec_t v1,v2;
v1 = sqrt( aux[0][0] * aux[0][0] + aux[1][0] * aux[1][0] );
v2 = sqrt( aux[0][1] * aux[0][1] + aux[1][1] * aux[1][1] );
vec_t sS,sT;
// put the values for scale on S and T here:
sS = 1.2 / v1;
sT = 0.8 / v2;
aux[0][0] *= sS; aux[1][0] *= sS;
aux[0][1] *= sT; aux[1][1] *= sT;
ConvertTexMatWithQTexture( aux, NULL, BPO, selFace->d_texture );
#endif
// now BPO must be expressed back in (origin,texS,texT) axis base BP = M^-1 * BPO * M
BPMatMul( m, BPO, aux ); // m is M^-1
m[0][2] = -Os; m[1][2] = -Ot;
BPMatMul( aux, m, pBP->coords );
// now emit the coordinates on the winding
EmitBrushPrimitTextureCoordinates( selFace, selFace->face_winding );
Sys_UpdateWindows( W_CAMERA );
}