-static void gis_opengl_render_tile(GisViewer *_self, GisTile *tile)
-{
- GisOpenGL *self = GIS_OPENGL(_self);
- if (!tile || !tile->data)
- return;
- GList *triangles = roam_sphere_get_intersect(self->sphere, FALSE,
- 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][2] = {
- {(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},
- };
-
- //if ((lat[0] == 90 && (xy[0][0] < 0 || xy[0][0] > 1)) ||
- // (lat[1] == 90 && (xy[1][0] < 0 || xy[1][0] > 1)) ||
- // (lat[2] == 90 && (xy[2][0] < 0 || xy[2][0] > 1)))
- // g_message("w,e=%4.f,%4.f "
- // "lat,lon,x,y="
- // "%4.1f,%4.0f,%4.2f,%4.2f "
- // "%4.1f,%4.0f,%4.2f,%4.2f "
- // "%4.1f,%4.0f,%4.2f,%4.2f ",
- // w,e,
- // lat[0], lon[0], xy[0][0], xy[0][1],
- // lat[1], lon[1], xy[1][0], xy[1][1],
- // lat[2], lon[2], xy[2][0], xy[2][1]);
-
- /* Fix poles */
- if (lat[0] == 90 || lat[0] == -90) xy[0][0] = 0.5;
- if (lat[1] == 90 || lat[1] == -90) xy[1][0] = 0.5;
- if (lat[2] == 90 || lat[2] == -90) xy[2][0] = 0.5;
-
- 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);
-}
-
-static void gis_opengl_render_tiles(GisViewer *_self, GisTile *tile)
-{
- GisOpenGL *self = GIS_OPENGL(_self);
- /* 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(_self, child);
- else
- /* No children, render this tile */
- gis_opengl_render_tile(_self, tile);
-}
-
-static void gis_opengl_set_height_func(GisViewer *_self, GisTile *tile,