X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=src%2Fgis-opengl.c;h=a70c6a8ebb3e251fda82c3a24ab2b711a514d5af;hb=8dea961dcde28d572ebece717e2533737e3c2be2;hp=bb2095113d9830d2bc1ad874396b62a946136dea;hpb=cd2b3c70807c914687f9051b34a8fe029de300ee;p=grits

diff --git a/src/gis-opengl.c b/src/gis-opengl.c
index bb20951..a70c6a8 100644
--- a/src/gis-opengl.c
+++ b/src/gis-opengl.c
@@ -122,12 +122,10 @@ static void _set_visuals(GisOpenGL *opengl)
 /********************
  * Object handleing *
  ********************/
-static void _draw_tile(GisOpenGL *opengl, GisTile *tile)
+static void _draw_tile(GisOpenGL *opengl, GisTile *tile, GList *triangles)
 {
 	if (!tile || !tile->data)
 		return;
-	GList *triangles = roam_sphere_get_intersect(opengl->sphere, FALSE,
-			tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
 	if (!triangles)
 		g_warning("GisOpenGL: _draw_tiles - No triangles to draw: edges=%f,%f,%f,%f",
 			tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
@@ -191,18 +189,41 @@ static void _draw_tile(GisOpenGL *opengl, GisTile *tile)
 static void _draw_tiles(GisOpenGL *opengl, GisTile *tile)
 {
 	/* Only draw children if possible */
-	gboolean has_children = TRUE;
+	gboolean has_children = FALSE;
 	GisTile *child;
 	gis_tile_foreach(tile, child)
-		if (!child || !child->data)
-			has_children = FALSE;
-	if (has_children)
-		/* Only draw children */
-		gis_tile_foreach(tile, child)
-			_draw_tiles(opengl, child);
-	else
-		/* No children, draw this tile */
-		_draw_tile(opengl, tile);
+		if (child && child->data)
+			has_children = TRUE;
+
+	GList *triangles = NULL;
+	if (has_children) {
+		/* TODO: simplify this */
+		const gdouble rows = G_N_ELEMENTS(tile->children);
+		const gdouble cols = G_N_ELEMENTS(tile->children[0]);
+		const gdouble lat_dist = tile->edge.n - tile->edge.s;
+		const gdouble lon_dist = tile->edge.e - tile->edge.w;
+		const gdouble lat_step = lat_dist / rows;
+		const gdouble lon_step = lon_dist / cols;
+		int row, col;
+		gis_tile_foreach_index(tile, row, col) {
+			GisTile *child = tile->children[row][col];
+			if (child && child->data) {
+				_draw_tiles(opengl, child);
+			} else {
+				const gdouble n = tile->edge.n-(lat_step*(row+0));
+				const gdouble s = tile->edge.n-(lat_step*(row+1));
+				const gdouble e = tile->edge.w+(lon_step*(col+1));
+				const gdouble w = tile->edge.w+(lon_step*(col+0));
+				GList *these = roam_sphere_get_intersect(opengl->sphere, FALSE, n, s, e, w);
+				triangles = g_list_concat(triangles, these);
+			}
+		}
+	} else {
+		triangles = roam_sphere_get_intersect(opengl->sphere, FALSE,
+				tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
+	}
+	if (triangles)
+		_draw_tile(opengl, tile, triangles);
 }
 
 static void _draw_marker(GisOpenGL *opengl, GisMarker *marker)
@@ -212,6 +233,10 @@ static void _draw_marker(GisOpenGL *opengl, GisMarker *marker)
 	gis_viewer_project(GIS_VIEWER(opengl),
 			point->lat, point->lon, point->elev,
 			&px, &py, &pz);
+
+	gint win_width  = GTK_WIDGET(opengl)->allocation.width;
+	gint win_height = GTK_WIDGET(opengl)->allocation.height;
+	py = win_height - py;
 	if (pz > 1)
 		return;
 
@@ -223,8 +248,7 @@ static void _draw_marker(GisOpenGL *opengl, GisMarker *marker)
 
 	glMatrixMode(GL_PROJECTION); glLoadIdentity();
 	glMatrixMode(GL_MODELVIEW);  glLoadIdentity();
-	glOrtho(0, GTK_WIDGET(opengl)->allocation.width,
-	        0, GTK_WIDGET(opengl)->allocation.height, -1, 1);
+	glOrtho(0, win_width, win_height, 0, -1, 1);
 	glTranslated(px - marker->xoff,
 	             py - marker->yoff, 0);
 
@@ -233,11 +257,12 @@ static void _draw_marker(GisOpenGL *opengl, GisMarker *marker)
 	glDisable(GL_DEPTH_TEST);
 	glEnable(GL_TEXTURE_2D);
 	glBindTexture(GL_TEXTURE_2D, marker->tex);
+	glDisable(GL_CULL_FACE);
 	glBegin(GL_QUADS);
-	glTexCoord2f(1, 1); glVertex3f(width, 0     , 0);
-	glTexCoord2f(1, 0); glVertex3f(width, height, 0);
-	glTexCoord2f(0, 0); glVertex3f(0    , height, 0);
-	glTexCoord2f(0, 1); glVertex3f(0    , 0     , 0);
+	glTexCoord2f(1, 0); glVertex3f(width, 0     , 0);
+	glTexCoord2f(1, 1); glVertex3f(width, height, 0);
+	glTexCoord2f(0, 1); glVertex3f(0    , height, 0);
+	glTexCoord2f(0, 0); glVertex3f(0    , 0     , 0);
 	glEnd();
 }
 
@@ -251,14 +276,23 @@ static void _draw_object(GisOpenGL *opengl, GisObject *object)
 	//g_debug("GisOpenGL: draw_object");
 	/* Skip out of range objects */
 	if (object->lod > 0) {
+		/* LOD test */
 		gdouble eye[3], obj[3];
 		gis_viewer_get_location(GIS_VIEWER(opengl), &eye[0], &eye[1], &eye[2]);
+		gdouble elev = eye[2];
 		lle2xyz(eye[0], eye[1], eye[2], &eye[0], &eye[1], &eye[2]);
 		lle2xyz(object->center.lat, object->center.lon, object->center.elev,
 			&obj[0], &obj[1], &obj[2]);
 		gdouble dist = distd(obj, eye);
 		if (object->lod < dist)
 			return;
+
+		/* Horizon testing */
+		gdouble c = EARTH_R+elev;
+		gdouble a = EARTH_R;
+		gdouble horizon = sqrt(c*c - a*a);
+		if (dist > horizon)
+			return;
 	}
 
 	/* Draw */
@@ -270,6 +304,8 @@ static void _draw_object(GisOpenGL *opengl, GisObject *object)
 	} else if (GIS_IS_CALLBACK(object)) {
 		_draw_callback(opengl, GIS_CALLBACK(object));
 	} else if (GIS_IS_TILE(object)) {
+		glEnable(GL_DEPTH_TEST);
+		glDepthFunc(GL_LESS);
 		_draw_tiles(opengl, GIS_TILE(object));
 	}
 	glPopAttrib();
@@ -321,21 +357,6 @@ struct RenderLevel {
 	GList sorted;
 };
 
-static void on_realize(GisOpenGL *opengl, gpointer _)
-{
-	g_debug("GisOpenGL: on_realize");
-
-	GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(opengl));
-	GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
-	if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
-		g_assert_not_reached();
-
-	_set_visuals(opengl);
-	g_mutex_lock(opengl->sphere_lock);
-	roam_sphere_update_errors(opengl->sphere);
-	g_mutex_unlock(opengl->sphere_lock);
-}
-
 static gboolean on_configure(GisOpenGL *opengl, GdkEventConfigure *event, gpointer _)
 {
 	g_debug("GisOpenGL: on_configure");
@@ -359,6 +380,19 @@ static gboolean on_configure(GisOpenGL *opengl, GdkEventConfigure *event, gpoint
 	return FALSE;
 }
 
+static void on_realize(GisOpenGL *opengl, gpointer _)
+{
+	g_debug("GisOpenGL: on_realize");
+
+	GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(opengl));
+	GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
+	if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
+		g_assert_not_reached();
+
+	_set_visuals(opengl);
+	on_configure(opengl, NULL, NULL);
+}
+
 static gboolean _draw_level(gpointer key, gpointer value, gpointer user_data)
 {
 	g_debug("GisOpenGL: _draw_level - level=%-4d", (int)key);
@@ -441,9 +475,11 @@ static gboolean on_key_press(GisOpenGL *opengl, GdkEventKey *event, gpointer _)
 	return FALSE;
 }
 
-static gboolean _update_errors_cb(gpointer sphere)
+static gboolean _update_errors_cb(gpointer _opengl)
 {
-	roam_sphere_update_errors(sphere);
+	GisOpenGL *opengl = _opengl;
+	roam_sphere_update_errors(opengl->sphere);
+	opengl->ue_source = 0;
 	return FALSE;
 }
 static void on_view_changed(GisOpenGL *opengl,
@@ -452,8 +488,9 @@ static void on_view_changed(GisOpenGL *opengl,
 	g_debug("GisOpenGL: on_view_changed");
 	_set_visuals(opengl);
 #ifndef ROAM_DEBUG
-	opengl->ue_source = g_idle_add_full(G_PRIORITY_HIGH_IDLE+30,
-			_update_errors_cb, opengl->sphere, NULL);
+	if (!opengl->ue_source)
+		opengl->ue_source = g_idle_add_full(G_PRIORITY_HIGH_IDLE+30,
+				_update_errors_cb, opengl, NULL);
 	//roam_sphere_update_errors(opengl->sphere);
 #endif
 }