/* called from drawview.c, as an extra per-window draw option */
void drawPropCircle(const struct bContext *C, TransInfo *t)
{
if (t->flag & T_PROP_EDIT) {
RegionView3D *rv3d = CTX_wm_region_view3d(C);
float tmat[4][4], imat[4][4];
float center[3];
UI_ThemeColor(TH_GRID);
if(t->spacetype == SPACE_VIEW3D && rv3d != NULL)
{
copy_m4_m4(tmat, rv3d->viewmat);
invert_m4_m4(imat, tmat);
}
else
{
unit_m4(tmat);
unit_m4(imat);
}
glPushMatrix();
VECCOPY(center, t->center);
if((t->spacetype == SPACE_VIEW3D) && t->obedit)
{
mul_m4_v3(t->obedit->obmat, center); /* because t->center is in local space */
}
else if(t->spacetype == SPACE_IMAGE)
{
float aspx, aspy;
ED_space_image_uv_aspect(t->sa->spacedata.first, &aspx, &aspy);
glScalef(1.0f/aspx, 1.0f/aspy, 1.0);
}
set_inverted_drawing(1);
drawcircball(GL_LINE_LOOP, center, t->prop_size, imat);
set_inverted_drawing(0);
glPopMatrix();
}
}
static void draw_uvs_stretch(SpaceImage *sima, Scene *scene, EditMesh *em, MTFace *activetf)
{
EditFace *efa;
MTFace *tf;
Image *ima= sima->image;
float aspx, aspy, col[4], tf_uv[4][2];
ED_space_image_uv_aspect(sima, &aspx, &aspy);
switch(sima->dt_uvstretch) {
case SI_UVDT_STRETCH_AREA:
{
float totarea=0.0f, totuvarea=0.0f, areadiff, uvarea, area;
for(efa= em->faces.first; efa; efa= efa->next) {
tf= CustomData_em_get(&em->fdata, efa->data, CD_MTFACE);
uv_copy_aspect(tf->uv, tf_uv, aspx, aspy);
totarea += EM_face_area(efa);
//totuvarea += tf_area(tf, efa->v4!=0);
totuvarea += uv_area(tf_uv, efa->v4!=0);
if(uvedit_face_visible(scene, ima, efa, tf)) {
efa->tmp.p = tf;
}
else {
if(tf == activetf)
activetf= NULL;
efa->tmp.p = NULL;
}
}
if(totarea < FLT_EPSILON || totuvarea < FLT_EPSILON) {
col[0] = 1.0;
col[1] = col[2] = 0.0;
glColor3fv(col);
for(efa= em->faces.first; efa; efa= efa->next) {
if((tf=(MTFace *)efa->tmp.p)) {
glBegin(efa->v4?GL_QUADS:GL_TRIANGLES);
glVertex2fv(tf->uv[0]);
glVertex2fv(tf->uv[1]);
glVertex2fv(tf->uv[2]);
if(efa->v4) glVertex2fv(tf->uv[3]);
glEnd();
}
}
}
else {
for(efa= em->faces.first; efa; efa= efa->next) {
if((tf=(MTFace *)efa->tmp.p)) {
area = EM_face_area(efa) / totarea;
uv_copy_aspect(tf->uv, tf_uv, aspx, aspy);
//uvarea = tf_area(tf, efa->v4!=0) / totuvarea;
uvarea = uv_area(tf_uv, efa->v4!=0) / totuvarea;
if(area < FLT_EPSILON || uvarea < FLT_EPSILON)
areadiff = 1.0;
else if(area>uvarea)
areadiff = 1.0-(uvarea/area);
else
areadiff = 1.0-(area/uvarea);
weight_to_rgb(areadiff, col, col+1, col+2);
glColor3fv(col);
glBegin(efa->v4?GL_QUADS:GL_TRIANGLES);
glVertex2fv(tf->uv[0]);
glVertex2fv(tf->uv[1]);
glVertex2fv(tf->uv[2]);
if(efa->v4) glVertex2fv(tf->uv[3]);
glEnd();
}
}
}
break;
}
case SI_UVDT_STRETCH_ANGLE:
{
float uvang1,uvang2,uvang3,uvang4;
float ang1,ang2,ang3,ang4;
float av1[3], av2[3], av3[3], av4[3]; /* use for 2d and 3d angle vectors */
float a;
col[3] = 0.5; /* hard coded alpha, not that nice */
glShadeModel(GL_SMOOTH);
for(efa= em->faces.first; efa; efa= efa->next) {
tf= CustomData_em_get(&em->fdata, efa->data, CD_MTFACE);
if(uvedit_face_visible(scene, ima, efa, tf)) {
efa->tmp.p = tf;
uv_copy_aspect(tf->uv, tf_uv, aspx, aspy);
if(efa->v4) {
#if 0 /* Simple but slow, better reuse normalized vectors */
uvang1 = RAD2DEG(Vec2Angle3(tf_uv[3], tf_uv[0], tf_uv[1]));
ang1 = RAD2DEG(VecAngle3(efa->v4->co, efa->v1->co, efa->v2->co));
uvang2 = RAD2DEG(Vec2Angle3(tf_uv[0], tf_uv[1], tf_uv[2]));
ang2 = RAD2DEG(VecAngle3(efa->v1->co, efa->v2->co, efa->v3->co));
uvang3 = RAD2DEG(Vec2Angle3(tf_uv[1], tf_uv[2], tf_uv[3]));
ang3 = RAD2DEG(VecAngle3(efa->v2->co, efa->v3->co, efa->v4->co));
uvang4 = RAD2DEG(Vec2Angle3(tf_uv[2], tf_uv[3], tf_uv[0]));
ang4 = RAD2DEG(VecAngle3(efa->v3->co, efa->v4->co, efa->v1->co));
#endif
/* uv angles */
VECSUB2D(av1, tf_uv[3], tf_uv[0]); Normalize2(av1);
VECSUB2D(av2, tf_uv[0], tf_uv[1]); Normalize2(av2);
VECSUB2D(av3, tf_uv[1], tf_uv[2]); Normalize2(av3);
VECSUB2D(av4, tf_uv[2], tf_uv[3]); Normalize2(av4);
/* This is the correct angle however we are only comparing angles
* uvang1 = 90-((NormalizedVecAngle2_2D(av1, av2) * 180.0/M_PI)-90);*/
uvang1 = NormalizedVecAngle2_2D(av1, av2)*180.0/M_PI;
uvang2 = NormalizedVecAngle2_2D(av2, av3)*180.0/M_PI;
uvang3 = NormalizedVecAngle2_2D(av3, av4)*180.0/M_PI;
uvang4 = NormalizedVecAngle2_2D(av4, av1)*180.0/M_PI;
/* 3d angles */
VECSUB(av1, efa->v4->co, efa->v1->co); Normalize(av1);
VECSUB(av2, efa->v1->co, efa->v2->co); Normalize(av2);
VECSUB(av3, efa->v2->co, efa->v3->co); Normalize(av3);
VECSUB(av4, efa->v3->co, efa->v4->co); Normalize(av4);
/* This is the correct angle however we are only comparing angles
* ang1 = 90-((NormalizedVecAngle2(av1, av2) * 180.0/M_PI)-90);*/
ang1 = NormalizedVecAngle2(av1, av2)*180.0/M_PI;
ang2 = NormalizedVecAngle2(av2, av3)*180.0/M_PI;
ang3 = NormalizedVecAngle2(av3, av4)*180.0/M_PI;
ang4 = NormalizedVecAngle2(av4, av1)*180.0/M_PI;
glBegin(GL_QUADS);
/* This simple makes the angles display worse then they really are ;)
* 1.0-pow((1.0-a), 2) */
a = fabs(uvang1-ang1)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[0]);
a = fabs(uvang2-ang2)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[1]);
a = fabs(uvang3-ang3)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[2]);
a = fabs(uvang4-ang4)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[3]);
}
else {
#if 0 /* Simple but slow, better reuse normalized vectors */
uvang1 = RAD2DEG(Vec2Angle3(tf_uv[2], tf_uv[0], tf_uv[1]));
ang1 = RAD2DEG(VecAngle3(efa->v3->co, efa->v1->co, efa->v2->co));
uvang2 = RAD2DEG(Vec2Angle3(tf_uv[0], tf_uv[1], tf_uv[2]));
ang2 = RAD2DEG(VecAngle3(efa->v1->co, efa->v2->co, efa->v3->co));
uvang3 = M_PI-(uvang1+uvang2);
ang3 = M_PI-(ang1+ang2);
#endif
/* uv angles */
VECSUB2D(av1, tf_uv[2], tf_uv[0]); Normalize2(av1);
VECSUB2D(av2, tf_uv[0], tf_uv[1]); Normalize2(av2);
VECSUB2D(av3, tf_uv[1], tf_uv[2]); Normalize2(av3);
/* This is the correct angle however we are only comparing angles
* uvang1 = 90-((NormalizedVecAngle2_2D(av1, av2) * 180.0/M_PI)-90); */
uvang1 = NormalizedVecAngle2_2D(av1, av2)*180.0/M_PI;
uvang2 = NormalizedVecAngle2_2D(av2, av3)*180.0/M_PI;
uvang3 = NormalizedVecAngle2_2D(av3, av1)*180.0/M_PI;
/* 3d angles */
VECSUB(av1, efa->v3->co, efa->v1->co); Normalize(av1);
VECSUB(av2, efa->v1->co, efa->v2->co); Normalize(av2);
VECSUB(av3, efa->v2->co, efa->v3->co); Normalize(av3);
/* This is the correct angle however we are only comparing angles
* ang1 = 90-((NormalizedVecAngle2(av1, av2) * 180.0/M_PI)-90); */
ang1 = NormalizedVecAngle2(av1, av2)*180.0/M_PI;
ang2 = NormalizedVecAngle2(av2, av3)*180.0/M_PI;
ang3 = NormalizedVecAngle2(av3, av1)*180.0/M_PI;
/* This simple makes the angles display worse then they really are ;)
* 1.0-pow((1.0-a), 2) */
glBegin(GL_TRIANGLES);
a = fabs(uvang1-ang1)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[0]);
a = fabs(uvang2-ang2)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[1]);
a = fabs(uvang3-ang3)/180.0;
weight_to_rgb(1.0-pow((1.0-a), 2), col, col+1, col+2);
glColor3fv(col);
glVertex2fv(tf->uv[2]);
}
glEnd();
}
else {
if(tf == activetf)
activetf= NULL;
efa->tmp.p = NULL;
}
}
glShadeModel(GL_FLAT);
break;
}
}
}
