//draw a sortof sphere - i.e., the 2d radius is proportional to the 3d
//radius, but not to the distance from the eye
int g3_draw_sphere(g3s_point *pnt,fix rad)
{
if (! (pnt->p3_codes & CC_BEHIND)) {
if (! (pnt->p3_flags & PF_PROJECTED))
g3_project_point(pnt);
if (! (pnt->p3_codes & PF_OVERFLOW)) {
fix r2,t;
r2 = fixmul(rad,Matrix_scale.x);
#ifndef __powerc
if (checkmuldiv(&t,r2,Canv_w2,pnt->p3_z))
return gr_disk(pnt->p3_sx,pnt->p3_sy,t);
#else
if (pnt->p3_z == 0)
return 0;
return gr_disk(pnt->p3_sx, pnt->p3_sy, fl2f(((f2fl(r2) * fCanv_w2) / f2fl(pnt->p3_z))));
#endif
}
}
return 0;
}
//draw a sortof sphere - i.e., the 2d radius is proportional to the 3d
//radius, but not to the distance from the eye
int G3DrawSphere (g3sPoint *pnt, fix rad)
{
if (! (pnt->p3_codes & CC_BEHIND)) {
if (! (pnt->p3Flags & PF_PROJECTED))
G3ProjectPoint (pnt);
if (! (pnt->p3_codes & PF_OVERFLOW)) {
fix r2, t;
r2 = FixMul (rad, viewInfo.scale.x);
#ifndef __powerc
if (CheckMulDiv (&t, r2, xCanvW2, pnt->p3_z))
return gr_disk (pnt->p3_sx, pnt->p3_sy, t);
#else
if (pnt->p3_z == 0)
return 0;
return gr_disk (pnt->p3_sx, pnt->p3_sy, fl2f (( (f2fl (r2) * fxCanvW2) / f2fl (pnt->p3_z)));
#endif
}
}
