static bool check_view(TCOD_list_t active_views, view_t **it) {
view_t *view=*it;
line_t *shallow_line=&view->shallow_line;
line_t *steep_line=&view->steep_line;
if (LINE_COLINEAR(shallow_line,steep_line)
&& (COLINEAR(shallow_line,offset,limit)
|| COLINEAR(shallow_line,limit,offset)) ) {
//printf ("deleting view %x\n",it);
// slow !
TCOD_list_remove_iterator(active_views,(void **)it);
return false;
}
return true;
}
/*
+-----------------------------------------------------------+
* @desc FIXME
+-----------------------------------------------------------+
*/
static bool
check_view(RLFL_list_t active_views, view_t **it)
{
view_t *view = *it;
line_t *shallow_line = &view->shallow_line;
line_t *steep_line = &view->steep_line;
if (LINE_COLINEAR(shallow_line, steep_line)
&& (COLINEAR(shallow_line, 0, 1) || COLINEAR(shallow_line, 1, 0)) ){
// slow !
RLFL_list_remove_iterator(active_views, (void **)it);
return false;
}
return true;
}
static void
draw_cut_style_cap_callback (int iloop,
double cap[][3],
float face_color[3],
gleDouble cut_vector[3],
gleDouble bisect_vector[3],
double norms[][3],
int frontwards)
{
#ifdef DELICATE_TESSELATOR
int i;
int is_colinear;
double *previous_vertex = 0x0;
double *first_vertex = 0x0;
#endif /* DELICATE_TESSELATOR */
#ifdef OPENGL_10
GLUtriangulatorObj *tobj;
tobj = gluNewTess ();
gluTessCallback (tobj, GLU_BEGIN, glBegin);
gluTessCallback (tobj, GLU_VERTEX, glVertex3dv);
gluTessCallback (tobj, GLU_END, glEnd);
#endif /* OPENGL_10 */
if (face_color != NULL) C3F (face_color);
if (frontwards) {
/* if lighting is on, specify the endcap normal */
if (cut_vector != NULL) {
/* if normal pointing in wrong direction, flip it. */
if (cut_vector[2] < 0.0) {
VEC_SCALE (cut_vector, -1.0, cut_vector);
}
N3F_D (cut_vector);
}
#ifdef GL_32
BGNPOLYGON();
for (i=0; i<iloop; i++) {
V3F_D (cap[i], i, FRONT_CAP);
}
ENDPOLYGON();
#endif /* GL_32 */
#ifdef OPENGL_10
/* If you have a tesselator that is happy with anything,
* including degenerate points, colinear segments, etc.
* then define this. Otherwise, pick one of the others.
*
* I beleive that the stock SGI tesselator is "lenient",
* despite explicit disclaimers in the documentation.
* (circa 1995).
*
* The Mesa tesselator is not at all forgiving of
* degenerate points.
* (circa 1997-1998)
*/
#ifdef LENIENT_TESSELATOR
gluBeginPolygon (tobj);
for (i=0; i<iloop; i++) {
gluTessVertex (tobj, cap[i], cap[i]);
}
gluEndPolygon (tobj);
#endif /* LENIENT_TESSELATOR */
#ifdef DELICATE_TESSELATOR
gluBeginPolygon (tobj);
first_vertex = 0x0;
previous_vertex = cap[iloop-1];
for (i=0; i<iloop-1; i++) {
COLINEAR (is_colinear, previous_vertex, cap[i], cap[i+1]);
if (!is_colinear) {
gluTessVertex (tobj, cap[i], cap[i]);
previous_vertex = cap[i];
if (!first_vertex) first_vertex = previous_vertex;
}
}
if (!first_vertex) first_vertex = cap[0];
COLINEAR (is_colinear, previous_vertex, cap[iloop-1], first_vertex);
if (!is_colinear) gluTessVertex (tobj, cap[iloop-1], cap[iloop-1]);
gluEndPolygon (tobj);
#endif /* DELICATE_TESSELATOR */
#endif /* OPENGL_10 */
} else {
/* if lighting is on, specify the endcap normal */
if (cut_vector != NULL) {
/* if normal pointing in wrong direction, flip it. */
if (cut_vector[2] > 0.0) {
VEC_SCALE (cut_vector, -1.0, cut_vector);
}
N3F_D (cut_vector);
}
/* the sense of the loop is reversed for backfacing culling */
#ifdef GL_32
BGNPOLYGON();
for (i=iloop-1; i>-1; i--) {
V3F_D (cap[i], i, BACK_CAP);
}
ENDPOLYGON();
#endif /* GL_32 */
#ifdef OPENGL_10
#ifdef LENIENT_TESSELATOR
gluBeginPolygon (tobj);
for (i=iloop-1; i>-1; i--) {
gluTessVertex (tobj, cap[i], cap[i]);
}
gluEndPolygon (tobj);
#endif /* LENIENT_TESSELATOR */
#ifdef DELICATE_TESSELATOR
gluBeginPolygon (tobj);
first_vertex = 0x0;
previous_vertex = cap[0];
for (i=iloop-1; i>0; i--) {
COLINEAR (is_colinear, previous_vertex, cap[i], cap[i-1]);
if (!is_colinear) {
gluTessVertex (tobj, cap[i], cap[i]);
previous_vertex = cap[i];
if (!first_vertex) first_vertex = previous_vertex;
}
}
if (!first_vertex) first_vertex = cap[iloop-1];
COLINEAR (is_colinear, previous_vertex, cap[0], first_vertex);
if (!is_colinear) gluTessVertex (tobj, cap[0], cap[0]);
gluEndPolygon (tobj);
#endif /* DELICATE_TESSELATOR */
#endif /* OPENGL_10 */
}
#ifdef OPENGL_10
gluDeleteTess (tobj);
#endif /* OPENGL_10 */
}
