-void gis_opengl_render_tile(GisOpenGL *self, GisTile *tile)
-{
- if (!tile || !tile->data)
- return;
- GList *triangles = roam_sphere_get_intersect(self->sphere,
- tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
- if (!triangles)
- g_warning("GisOpenGL: render_tiles - No triangles to draw: edges=%f,%f,%f,%f",
- tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
- //g_message("rendering %4d triangles for tile edges=%7.2f,%7.2f,%7.2f,%7.2f",
- // g_list_length(triangles), tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
- for (GList *cur = triangles; cur; cur = cur->next) {
- RoamTriangle *tri = cur->data;
-
- gdouble lat[3] = {tri->p.r->lat, tri->p.m->lat, tri->p.l->lat};
- gdouble lon[3] = {tri->p.r->lon, tri->p.m->lon, tri->p.l->lon};
-
- if (lon[0] < -90 || lon[1] < -90 || lon[2] < -90) {
- if (lon[0] > 90) lon[0] -= 360;
- if (lon[1] > 90) lon[1] -= 360;
- if (lon[2] > 90) lon[2] -= 360;
- }
-
- gdouble n = tile->edge.n;
- gdouble s = tile->edge.s;
- gdouble e = tile->edge.e;
- gdouble w = tile->edge.w;
-
- gdouble londist = e - w;
- gdouble latdist = n - s;
-
- gdouble xy[][3] = {
- {(lon[0]-w)/londist, 1-(lat[0]-s)/latdist},
- {(lon[1]-w)/londist, 1-(lat[1]-s)/latdist},
- {(lon[2]-w)/londist, 1-(lat[2]-s)/latdist},
- };
-
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, *(guint*)tile->data);
- glBegin(GL_TRIANGLES);
- glNormal3dv(tri->p.r->norm); glTexCoord2dv(xy[0]); glVertex3dv((double*)tri->p.r);
- glNormal3dv(tri->p.m->norm); glTexCoord2dv(xy[1]); glVertex3dv((double*)tri->p.m);
- glNormal3dv(tri->p.l->norm); glTexCoord2dv(xy[2]); glVertex3dv((double*)tri->p.l);
- glEnd();
- }
- g_list_free(triangles);
-}
-
-void gis_opengl_render_tiles(GisOpenGL *opengl, GisTile *tile)
-{
- /* Only render children if possible */
- gboolean has_children = TRUE;
- GisTile *child;
- gis_tile_foreach(tile, child)
- if (!child || !child->data)
- has_children = FALSE;
- if (has_children)
- /* Only render children */
- gis_tile_foreach(tile, child)
- gis_opengl_render_tiles(opengl, child);
- else
- /* No children, render this tile */
- gis_opengl_render_tile(opengl, tile);
-}
-
-void gis_opengl_set_height_func(GisOpenGL *self, GisTile *tile,