Add Shuttle Radar Topography Mission plugin and height code

[grits] / src / gis-opengl.c

diff --git a/src/gis-opengl.c b/src/gis-opengl.c
index 4d3b7e4b98b212552f1a151dba83ed399e78d42f..d1c845f2ba4c53c125c8723949aeddd2034041e2 100644 (file)
--- a/src/gis-opengl.c
+++ b/src/gis-opengl.c
@@ -335,6 +335,27 @@ void gis_opengl_render_tiles(GisOpenGL *opengl, GisTile *tile)
                /* No children, render this tile */
                gis_opengl_render_tile(opengl, tile);
 }
+
+void gis_opengl_set_height_func(GisOpenGL *self, GisTile *tile,
+               RoamHeightFunc height_func, gpointer user_data, gboolean update)
+{
+       if (!tile)
+               return;
+       /* TODO: get points? */
+       GList *triangles = roam_sphere_get_intersect(self->sphere,
+                       tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
+       for (GList *cur = triangles; cur; cur = cur->next) {
+               RoamTriangle *tri = cur->data;
+               RoamPoint *points[] = {tri->p.l, tri->p.m, tri->p.r, tri->split};
+               for (int i = 0; i < G_N_ELEMENTS(points); i++) {
+                       points[i]->height_func = height_func;
+                       points[i]->height_data = user_data;
+                       roam_point_update_height(points[i]);
+               }
+       }
+       g_list_free(triangles);
+}
+
 void gis_opengl_redraw(GisOpenGL *self)
 {
        g_debug("GisOpenGL: redraw");