/*
- * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
- *
+ * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
+ *
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/**
+ * SECTION:gis-opengl
+ * @short_description: OpenGL based virtual globe
+ *
+ * #GisOpenGL is the core rendering engine used by libgis. Theoretically other
+ * renderers could be writte, but they have not been. GisOpenGL uses the ROAM
+ * algorithm for updating surface mesh the planet. The only thing GisOpenGL can
+ * actually render on it's own is a wireframe of a sphere.
+ *
+ * GisOpenGL relies on #GtkGlExt and requires (at least) OpenGL 2.0.
+ */
+
#include <config.h>
#include <math.h>
+#include <string.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <gtk/gtkgl.h>
#include <GL/gl.h>
#include <GL/glu.h>
-#include "misc.h"
-#include "aweather-gui.h"
-#include "gis-world.h"
-#include "gis-view.h"
#include "gis-opengl.h"
+#include "gis-util.h"
+#include "roam.h"
-/****************
- * GObject code *
- ****************/
-G_DEFINE_TYPE(GisOpenGL, gis_opengl, G_TYPE_OBJECT);
-static void gis_opengl_init(GisOpenGL *self)
+#include "objects/gis-object.h"
+#include "objects/gis-tile.h"
+#include "objects/gis-marker.h"
+#include "objects/gis-callback.h"
+
+// #define ROAM_DEBUG
+
+/* Tessellation, "finding intersecting triangles" */
+/* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
+/* http://www.opengl.org/wiki/Alpha_Blending */
+
+/***********
+ * Helpers *
+ ***********/
+static void _set_visuals(GisOpenGL *opengl)
{
- g_debug("GisOpenGL: init");
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ /* Camera 1 */
+ double lat, lon, elev, rx, ry, rz;
+ gis_viewer_get_location(GIS_VIEWER(opengl), &lat, &lon, &elev);
+ gis_viewer_get_rotation(GIS_VIEWER(opengl), &rx, &ry, &rz);
+ glRotatef(rx, 1, 0, 0);
+ glRotatef(rz, 0, 0, 1);
+
+ /* Lighting */
+#ifdef ROAM_DEBUG
+ float light_ambient[] = {0.7f, 0.7f, 0.7f, 1.0f};
+ float light_diffuse[] = {2.0f, 2.0f, 2.0f, 1.0f};
+#else
+ float light_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f};
+ float light_diffuse[] = {5.0f, 5.0f, 5.0f, 1.0f};
+#endif
+ float light_position[] = {-13*EARTH_R, 1*EARTH_R, 3*EARTH_R, 1.0f};
+ glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+ glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+ glEnable(GL_LIGHT0);
+ glEnable(GL_LIGHTING);
+
+ float material_ambient[] = {0.2, 0.2, 0.2, 1.0};
+ float material_diffuse[] = {0.8, 0.8, 0.8, 1.0};
+ float material_specular[] = {0.1, 0.1, 0.1, 1.0};
+ float material_emission[] = {0.0, 0.0, 0.0, 1.0};
+ glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, material_ambient);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, material_diffuse);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, material_specular);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, material_emission);
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_COLOR_MATERIAL);
+
+ /* Camera 2 */
+ glTranslatef(0, 0, -elev2rad(elev));
+ glRotatef(lat, 1, 0, 0);
+ glRotatef(-lon, 0, 1, 0);
+
+ glDisable(GL_ALPHA_TEST);
+
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glEnable(GL_BLEND);
+
+#ifndef ROAM_DEBUG
+ glCullFace(GL_BACK);
+ glEnable(GL_CULL_FACE);
+#endif
+
+ glClearDepth(1.0);
+ glDepthFunc(GL_LEQUAL);
+ glEnable(GL_DEPTH_TEST);
+
+ glEnable(GL_LINE_SMOOTH);
+
+ glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+ //glShadeModel(GL_FLAT);
+
+ g_mutex_lock(opengl->sphere_lock);
+ roam_sphere_update_view(opengl->sphere);
+ g_mutex_unlock(opengl->sphere_lock);
}
-static GObject *gis_opengl_constructor(GType gtype, guint n_properties,
- GObjectConstructParam *properties)
+
+
+/********************
+ * Object handleing *
+ ********************/
+static void _draw_tile(GisOpenGL *opengl, GisTile *tile, GList *triangles)
{
- g_debug("gis_opengl: constructor");
- GObjectClass *parent_class = G_OBJECT_CLASS(gis_opengl_parent_class);
- return parent_class->constructor(gtype, n_properties, properties);
+ if (!tile || !tile->data)
+ return;
+ 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);
+ //g_message("drawing %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);
+ 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 xscale = tile->coords.e - tile->coords.w;
+ gdouble yscale = tile->coords.s - tile->coords.n;
+
+ 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 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;
+
+ /* Scale to tile coords */
+ for (int i = 0; i < 3; i++) {
+ xy[i][0] = tile->coords.w + xy[i][0]*xscale;
+ xy[i][1] = tile->coords.n + xy[i][1]*yscale;
+ }
+
+ glEnable(GL_TEXTURE_2D);
+ glEnable(GL_POLYGON_OFFSET_FILL);
+ glBindTexture(GL_TEXTURE_2D, *(guint*)tile->data);
+ glPolygonOffset(0, -tile->zindex);
+ 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();
+ }
}
-static void gis_opengl_dispose(GObject *gobject)
+
+static void _draw_tiles(GisOpenGL *opengl, GisTile *tile)
{
- g_debug("GisOpenGL: dispose");
- GisOpenGL *self = GIS_OPENGL(gobject);
- if (self->world) {
- g_object_unref(self->world);
- self->world = NULL;
+ /* Only draw children if possible */
+ gboolean has_children = FALSE;
+ GisTile *child;
+ gis_tile_foreach(tile, child)
+ 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 (self->view) {
- g_object_unref(self->view);
- self->view = NULL;
+ if (triangles)
+ _draw_tile(opengl, tile, triangles);
+ g_list_free(triangles);
+}
+
+static void _draw_marker(GisOpenGL *opengl, GisMarker *marker)
+{
+ GisPoint *point = gis_object_center(marker);
+ gdouble px, py, pz;
+ 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;
+
+ //g_debug("GisOpenGL: draw_marker - %s pz=%f ", marker->label, pz);
+
+ cairo_surface_t *surface = cairo_get_target(marker->cairo);
+ gdouble width = cairo_image_surface_get_width(surface);
+ gdouble height = cairo_image_surface_get_height(surface);
+
+ glMatrixMode(GL_PROJECTION); glLoadIdentity();
+ glMatrixMode(GL_MODELVIEW); glLoadIdentity();
+ glOrtho(0, win_width, win_height, 0, -1, 1);
+ glTranslated(px - marker->xoff,
+ py - marker->yoff, 0);
+
+ glDisable(GL_LIGHTING);
+ glDisable(GL_COLOR_MATERIAL);
+ glDisable(GL_DEPTH_TEST);
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, marker->tex);
+ glDisable(GL_CULL_FACE);
+ glBegin(GL_QUADS);
+ 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();
+}
+
+static void _draw_callback(GisOpenGL *opengl, GisCallback *callback)
+{
+ callback->callback(callback, callback->user_data);
+}
+
+static void _draw_object(GisOpenGL *opengl, GisObject *object)
+{
+ //g_debug("GisOpenGL: draw_object");
+ /* Skip hidden objects */
+ if (object->hidden)
+ return;
+
+ /* 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;
}
- if (self->drawing) {
- g_object_unref(self->drawing);
- self->drawing = NULL;
+
+ /* Draw */
+ glMatrixMode(GL_PROJECTION); glPushMatrix();
+ glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ glPushAttrib(GL_ALL_ATTRIB_BITS);
+ if (GIS_IS_MARKER(object)) {
+ _draw_marker(opengl, GIS_MARKER(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);
+ g_mutex_lock(opengl->sphere_lock);
+ _draw_tiles(opengl, GIS_TILE(object));
+ g_mutex_unlock(opengl->sphere_lock);
}
- G_OBJECT_CLASS(gis_opengl_parent_class)->dispose(gobject);
+ glPopAttrib();
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
}
-static void gis_opengl_finalize(GObject *gobject)
-{
- g_debug("GisOpenGL: finalize");
- G_OBJECT_CLASS(gis_opengl_parent_class)->finalize(gobject);
- gtk_main_quit();
+static void _load_object(GisOpenGL *opengl, GisObject *object)
+{
+ //g_debug("GisOpenGL: load_object");
+ if (GIS_IS_MARKER(object)) {
+ GisMarker *marker = GIS_MARKER(object);
+ cairo_surface_t *surface = cairo_get_target(marker->cairo);
+ gdouble width = cairo_image_surface_get_width(surface);
+ gdouble height = cairo_image_surface_get_height(surface);
+
+ glEnable(GL_TEXTURE_2D);
+ glGenTextures(1, &marker->tex);
+ glBindTexture(GL_TEXTURE_2D, marker->tex);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+ cairo_image_surface_get_data(surface));
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ //g_debug("load_texture: %d", marker->tex);
+ }
}
-static void gis_opengl_class_init(GisOpenGLClass *klass)
+
+static void _unload_object(GisOpenGL *opengl, GisObject *object)
{
- g_debug("GisOpenGL: class_init");
- GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
- gobject_class->constructor = gis_opengl_constructor;
- gobject_class->dispose = gis_opengl_dispose;
- gobject_class->finalize = gis_opengl_finalize;
+ //g_debug("GisOpenGL: unload_object");
+ if (GIS_IS_MARKER(object)) {
+ GisMarker *marker = GIS_MARKER(object);
+ glDeleteTextures(1, &marker->tex);
+ }
}
+
/*************
* Callbacks *
*************/
-gboolean on_button_press(GtkWidget *widget, GdkEventButton *event, GisOpenGL *self)
+/* The unsorted/sroted GLists are blank head nodes,
+ * This way us we can remove objects from the level just by fixing up links
+ * I.e. we don't need to do a lookup to remove an object if we have its GList */
+struct RenderLevel {
+ GList unsorted;
+ GList sorted;
+};
+
+static gboolean on_configure(GisOpenGL *opengl, GdkEventConfigure *event, gpointer _)
{
- g_debug("GisOpenGL: on_drawing_button_press - Grabbing focus");
- gtk_widget_grab_focus(GTK_WIDGET(self->drawing));
- return TRUE;
+ g_debug("GisOpenGL: on_configure");
+
+ double width = GTK_WIDGET(opengl)->allocation.width;
+ double height = GTK_WIDGET(opengl)->allocation.height;
+
+ /* Setup OpenGL Window */
+ glViewport(0, 0, width, height);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ double ang = atan(height/FOV_DIST);
+ gluPerspective(rad2deg(ang)*2, width/height, 1000, 10*EARTH_R);
+
+#ifndef ROAM_DEBUG
+ g_mutex_lock(opengl->sphere_lock);
+ roam_sphere_update_errors(opengl->sphere);
+ g_mutex_unlock(opengl->sphere_lock);
+#endif
+
+ return FALSE;
}
-gboolean on_key_press(GtkWidget *widget, GdkEventKey *event, GisOpenGL *self)
+
+static void on_realize(GisOpenGL *opengl, gpointer _)
{
- g_debug("GisOpenGL: on_drawing_key_press - key=%x, state=%x, plus=%x",
- event->keyval, event->state, GDK_plus);
- double x,y,z;
- gis_view_get_location(self->view, &x, &y, &z);
- guint kv = event->keyval;
- if (kv == GDK_Left || kv == GDK_h) gis_view_pan(self->view, -z/10, 0, 0);
- else if (kv == GDK_Down || kv == GDK_j) gis_view_pan(self->view, 0, -z/10, 0);
- else if (kv == GDK_Up || kv == GDK_k) gis_view_pan(self->view, 0, z/10, 0);
- else if (kv == GDK_Right || kv == GDK_l) gis_view_pan(self->view, z/10, 0, 0);
- else if (kv == GDK_minus || kv == GDK_o) gis_view_zoom(self->view, 10./9);
- else if (kv == GDK_plus || kv == GDK_i) gis_view_zoom(self->view, 9./10);
- else if (kv == GDK_H ) gis_view_rotate(self->view, 0, -10, 0);
- else if (kv == GDK_J ) gis_view_rotate(self->view, 10, 0, 0);
- else if (kv == GDK_K ) gis_view_rotate(self->view, -10, 0, 0);
- else if (kv == GDK_L ) gis_view_rotate(self->view, 0, 10, 0);
- return TRUE;
-}
+ 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);
+}
-gboolean on_map(GtkWidget *drawing, GdkEventConfigure *event, GisOpenGL *self)
+static gboolean _draw_level(gpointer key, gpointer value, gpointer user_data)
{
- g_debug("GisOpenGL: on_map");
+ g_debug("GisOpenGL: _draw_level - level=%-4d", (int)key);
+ GisOpenGL *opengl = user_data;
+ struct RenderLevel *level = value;
+ int nsorted = 0, nunsorted = 0;
+ GList *cur = NULL;
+
+ /* Draw opaque objects without sorting */
+ glDepthMask(TRUE);
+ glClear(GL_DEPTH_BUFFER_BIT);
+ for (cur = level->unsorted.next; cur; cur = cur->next, nunsorted++)
+ _draw_object(opengl, GIS_OBJECT(cur->data));
+
+ /* Freeze depth buffer and draw transparent objects sorted */
+ /* TODO: sorting */
+ //glDepthMask(FALSE);
+ glAlphaFunc(GL_GREATER, 0.1);
+ for (cur = level->sorted.next; cur; cur = cur->next, nsorted++)
+ _draw_object(opengl, GIS_OBJECT(cur->data));
+
+ /* TODO: Prune empty levels */
+
+ g_debug("GisOpenGL: _draw_level - drew %d,%d objects",
+ nunsorted, nsorted);
+ return FALSE;
+}
- /* Misc */
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+static gboolean on_expose(GisOpenGL *opengl, GdkEventExpose *event, gpointer _)
+{
+ g_debug("GisOpenGL: on_expose - begin");
- /* Tessellation, "finding intersecting triangles" */
- /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
- /* http://www.opengl.org/wiki/Alpha_Blending */
- glAlphaFunc(GL_GREATER,0.1);
- glEnable(GL_ALPHA_TEST);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ _set_visuals(opengl);
+#ifdef ROAM_DEBUG
+ glColor4f(0.0, 0.0, 9.0, 0.6);
+ glDisable(GL_TEXTURE_2D);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ roam_sphere_draw(opengl->sphere);
+ //roam_sphere_draw_normals(opengl->sphere);
+#else
+ g_mutex_lock(opengl->objects_lock);
+ g_tree_foreach(opengl->objects, _draw_level, opengl);
+ g_mutex_unlock(opengl->objects_lock);
+ if (opengl->wireframe) {
+ glClear(GL_DEPTH_BUFFER_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ roam_sphere_draw(opengl->sphere);
+ }
+#endif
- /* Depth test */
- glClearDepth(1.0);
- glDepthFunc(GL_LEQUAL);
- glEnable(GL_DEPTH_TEST);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
+ gdk_gl_drawable_swap_buffers(gldrawable);
- gis_opengl_end(self);
+ g_debug("GisOpenGL: on_expose - end\n");
return FALSE;
}
-gboolean on_configure(GtkWidget *drawing, GdkEventConfigure *event, GisOpenGL *self)
+static gboolean on_key_press(GisOpenGL *opengl, GdkEventKey *event, gpointer _)
{
- g_debug("GisOpenGL: on_confiure");
- gis_opengl_begin(self);
-
- double x, y, z;
- gis_view_get_location(self->view, &x, &y, &z);
+ g_debug("GisOpenGL: on_key_press - key=%x, state=%x, plus=%x",
+ event->keyval, event->state, GDK_plus);
- /* Window is at 500 m from camera */
- double width = GTK_WIDGET(self->drawing)->allocation.width;
- double height = GTK_WIDGET(self->drawing)->allocation.height;
+ guint kv = event->keyval;
+ /* Testing */
+ if (kv == GDK_w) {
+ opengl->wireframe = !opengl->wireframe;
+ gtk_widget_queue_draw(GTK_WIDGET(opengl));
+ }
+#ifdef ROAM_DEBUG
+ else if (kv == GDK_n) roam_sphere_split_one(opengl->sphere);
+ else if (kv == GDK_p) roam_sphere_merge_one(opengl->sphere);
+ else if (kv == GDK_r) roam_sphere_split_merge(opengl->sphere);
+ else if (kv == GDK_u) roam_sphere_update_errors(opengl->sphere);
+ gtk_widget_queue_draw(GTK_WIDGET(opengl));
+#endif
+ return FALSE;
+}
- glViewport(0, 0, width, height);
+static gboolean _update_errors_cb(gpointer _opengl)
+{
+ GisOpenGL *opengl = _opengl;
+ g_mutex_lock(opengl->sphere_lock);
+ roam_sphere_update_errors(opengl->sphere);
+ g_mutex_unlock(opengl->sphere_lock);
+ opengl->ue_source = 0;
+ return FALSE;
+}
+static void on_view_changed(GisOpenGL *opengl,
+ gdouble _1, gdouble _2, gdouble _3)
+{
+ g_debug("GisOpenGL: on_view_changed");
+ _set_visuals(opengl);
+#ifndef ROAM_DEBUG
+ 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
+}
- /* Perspective */
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- double ang = atan((height/2)/500);
+static gboolean on_idle(GisOpenGL *opengl)
+{
+ //g_debug("GisOpenGL: on_idle");
+ g_mutex_lock(opengl->sphere_lock);
+ if (roam_sphere_split_merge(opengl->sphere))
+ gtk_widget_queue_draw(GTK_WIDGET(opengl));
+ g_mutex_unlock(opengl->sphere_lock);
+ return TRUE;
+}
- //gluPerspective(r2d(ang)*2, width/height, -z-20, -z+20);
- gluPerspective(r2d(ang)*2, width/height, 1, 500*1000);
- gis_opengl_end(self);
- return FALSE;
+/*********************
+ * GisViewer methods *
+ *********************/
+/**
+ * gis_opengl_new:
+ * @plugins: the plugins store to use
+ * @prefs: the preferences object to use
+ *
+ * Create a new OpenGL renderer.
+ *
+ * Returns: the new #GisOpenGL
+ */
+GisViewer *gis_opengl_new(GisPlugins *plugins, GisPrefs *prefs)
+{
+ g_debug("GisOpenGL: new");
+ GisViewer *opengl = g_object_new(GIS_TYPE_OPENGL, NULL);
+ gis_viewer_setup(opengl, plugins, prefs);
+ return opengl;
}
-gboolean on_expose(GtkWidget *drawing, GdkEventExpose *event, GisOpenGL *self)
+static void gis_opengl_center_position(GisViewer *_opengl, gdouble lat, gdouble lon, gdouble elev)
{
- g_debug("GisOpenGL: on_expose - begin");
- gis_opengl_begin(self);
+ glRotatef(lon, 0, 1, 0);
+ glRotatef(-lat, 1, 0, 0);
+ glTranslatef(0, 0, elev2rad(elev));
+}
- double lx, ly, lz;
- double rx, ry, rz;
- gis_view_get_location(self->view, &lx, &ly, &lz);
- gis_view_get_rotation(self->view, &rx, &ry, &rz);
+static void gis_opengl_project(GisViewer *_opengl,
+ gdouble lat, gdouble lon, gdouble elev,
+ gdouble *px, gdouble *py, gdouble *pz)
+{
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ gdouble x, y, z;
+ lle2xyz(lat, lon, elev, &x, &y, &z);
+ gluProject(x, y, z,
+ opengl->sphere->view->model,
+ opengl->sphere->view->proj,
+ opengl->sphere->view->view,
+ px, py, pz);
+}
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(lx, ly, lz);
- glRotatef(rx, 1, 0, 0);
- glRotatef(ry, 0, 1, 0);
- glRotatef(rz, 0, 0, 1);
+static void gis_opengl_set_height_func(GisViewer *_opengl, GisBounds *bounds,
+ RoamHeightFunc height_func, gpointer user_data, gboolean update)
+{
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ /* TODO: get points? */
+ g_mutex_lock(opengl->sphere_lock);
+ GList *triangles = roam_sphere_get_intersect(opengl->sphere, TRUE,
+ bounds->n, bounds->s, bounds->e, bounds->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++) {
+ if (bounds->n >= points[i]->lat && points[i]->lat >= bounds->s &&
+ bounds->e >= points[i]->lon && points[i]->lon >= bounds->w) {
+ points[i]->height_func = height_func;
+ points[i]->height_data = user_data;
+ roam_point_update_height(points[i]);
+ }
+ }
+ }
+ g_list_free(triangles);
+ g_mutex_unlock(opengl->sphere_lock);
+}
- /* Expose plugins */
- /* TODO: Figure out how to handle plugins:
- * - Do they belong to AWeatherGui, GisOpenGL, etc?
- */
- for (GList *cur = self->plugins; cur; cur = cur->next) {
- AWeatherPlugin *plugin = AWEATHER_PLUGIN(cur->data);
- aweather_plugin_expose(plugin);
+static void _gis_opengl_clear_height_func_rec(RoamTriangle *root)
+{
+ if (!root)
+ return;
+ RoamPoint *points[] = {root->p.l, root->p.m, root->p.r, root->split};
+ for (int i = 0; i < G_N_ELEMENTS(points); i++) {
+ points[i]->height_func = NULL;
+ points[i]->height_data = NULL;
+ roam_point_update_height(points[i]);
}
+ _gis_opengl_clear_height_func_rec(root->kids[0]);
+ _gis_opengl_clear_height_func_rec(root->kids[1]);
+}
- gis_opengl_end(self);
- gis_opengl_flush(self);
- g_debug("GisOpenGL: on_expose - end\n");
- return FALSE;
+static void gis_opengl_clear_height_func(GisViewer *_opengl)
+{
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ for (int i = 0; i < G_N_ELEMENTS(opengl->sphere->roots); i++)
+ _gis_opengl_clear_height_func_rec(opengl->sphere->roots[i]);
}
-void on_state_changed(GisView *view,
- gdouble x, gdouble y, gdouble z, GisOpenGL *self)
+static gpointer gis_opengl_add(GisViewer *_opengl, GisObject *object,
+ gint key, gboolean sort)
{
- /* Reset clipping area and redraw */
- on_configure(NULL, NULL, self);
- gis_opengl_redraw(self);
+ g_assert(GIS_IS_OPENGL(_opengl));
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ g_mutex_lock(opengl->objects_lock);
+ _load_object(opengl, object);
+ struct RenderLevel *level = g_tree_lookup(opengl->objects, (gpointer)key);
+ if (!level) {
+ level = g_new0(struct RenderLevel, 1);
+ g_tree_insert(opengl->objects, (gpointer)key, level);
+ }
+ GList *list = sort ? &level->sorted : &level->unsorted;
+ /* Put the link in the list */
+ GList *link = g_new0(GList, 1);
+ link->data = object;
+ link->prev = list;
+ link->next = list->next;
+ if (list->next)
+ list->next->prev = link;
+ list->next = link;
+ g_mutex_unlock(opengl->objects_lock);
+ return link;
}
-/***********
- * Methods *
- ***********/
-GisOpenGL *gis_opengl_new(GisWorld *world, GisView *view, GtkDrawingArea *drawing)
+static GisObject *gis_opengl_remove(GisViewer *_opengl, gpointer _link)
{
- g_debug("GisOpenGL: new");
- GisOpenGL *self = g_object_new(GIS_TYPE_OPENGL, NULL);
- self->world = world;
- self->view = view;
- self->drawing = drawing;
- g_object_ref(world);
- g_object_ref(view);
- g_object_ref(drawing);
+ g_assert(GIS_IS_OPENGL(_opengl));
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ g_mutex_lock(opengl->objects_lock);
+ GList *link = _link;
+ GisObject *object = link->data;
+ _unload_object(opengl, object);
+ /* Just unlink and free it, link->prev is assured */
+ link->prev->next = link->next;
+ if (link->next)
+ link->next->prev = link->prev;
+ g_free(link);
+ g_object_unref(object);
+ g_mutex_unlock(opengl->objects_lock);
+ return object;
+}
+
+/****************
+ * GObject code *
+ ****************/
+static int _objects_cmp(gconstpointer _a, gconstpointer _b, gpointer _)
+{
+ gint a = (int)_a, b = (int)_b;
+ return a < b ? -1 :
+ a > b ? 1 : 0;
+}
+static void _objects_free(gpointer value)
+{
+ struct RenderLevel *level = value;
+ if (level->sorted.next)
+ g_list_free(level->sorted.next);
+ if (level->unsorted.next)
+ g_list_free(level->unsorted.next);
+ g_free(level);
+}
+G_DEFINE_TYPE(GisOpenGL, gis_opengl, GIS_TYPE_VIEWER);
+static void gis_opengl_init(GisOpenGL *opengl)
+{
+ g_debug("GisOpenGL: init");
/* OpenGL setup */
GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
GDK_GL_MODE_RGBA | GDK_GL_MODE_DEPTH |
GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
if (!glconfig)
g_error("Failed to create glconfig");
- if (!gtk_widget_set_gl_capability(GTK_WIDGET(self->drawing),
+ if (!gtk_widget_set_gl_capability(GTK_WIDGET(opengl),
glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
g_error("GL lacks required capabilities");
+ g_object_unref(glconfig);
- g_signal_connect(self->view, "location-changed", G_CALLBACK(on_state_changed), self);
- g_signal_connect(self->view, "rotation-changed", G_CALLBACK(on_state_changed), self);
+ opengl->objects = g_tree_new_full(_objects_cmp, NULL, NULL, _objects_free);
+ opengl->objects_lock = g_mutex_new();
+ opengl->sphere = roam_sphere_new(opengl);
+ opengl->sphere_lock = g_mutex_new();
- g_signal_connect(self->drawing, "map-event", G_CALLBACK(on_map), self);
- g_signal_connect(self->drawing, "configure-event", G_CALLBACK(on_configure), self);
- g_signal_connect(self->drawing, "expose-event", G_CALLBACK(on_expose), self);
+#ifndef ROAM_DEBUG
+ opengl->sm_source[0] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+30, 33, (GSourceFunc)on_idle, opengl, NULL);
+ opengl->sm_source[1] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+10, 500, (GSourceFunc)on_idle, opengl, NULL);
+#endif
- g_signal_connect(self->drawing, "button-press-event", G_CALLBACK(on_button_press), self);
- g_signal_connect(self->drawing, "enter-notify-event", G_CALLBACK(on_button_press), self);
- g_signal_connect(self->drawing, "key-press-event", G_CALLBACK(on_key_press), self);
- return self;
-}
+ gtk_widget_add_events(GTK_WIDGET(opengl), GDK_KEY_PRESS_MASK);
+ g_signal_connect(opengl, "realize", G_CALLBACK(on_realize), NULL);
+ g_signal_connect(opengl, "configure-event", G_CALLBACK(on_configure), NULL);
+ g_signal_connect(opengl, "expose-event", G_CALLBACK(on_expose), NULL);
-void gis_opengl_redraw(GisOpenGL *self)
-{
- g_debug("GisOpenGL: gl_redraw");
- gtk_widget_queue_draw(GTK_WIDGET(self->drawing));
+ g_signal_connect(opengl, "key-press-event", G_CALLBACK(on_key_press), NULL);
+
+ g_signal_connect(opengl, "location-changed", G_CALLBACK(on_view_changed), NULL);
+ g_signal_connect(opengl, "rotation-changed", G_CALLBACK(on_view_changed), NULL);
}
-void gis_opengl_begin(GisOpenGL *self)
+static void gis_opengl_dispose(GObject *_opengl)
{
- g_assert(GIS_IS_OPENGL(self));
-
- GdkGLContext *glcontext = gtk_widget_get_gl_context(GTK_WIDGET(self->drawing));
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self->drawing));
-
- if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
- g_assert_not_reached();
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ g_debug("GisOpenGL: dispose");
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ if (opengl->sm_source[0]) {
+ g_source_remove(opengl->sm_source[0]);
+ opengl->sm_source[0] = 0;
+ }
+ if (opengl->sm_source[1]) {
+ g_source_remove(opengl->sm_source[1]);
+ opengl->sm_source[1] = 0;
+ }
+ if (opengl->ue_source) {
+ g_source_remove(opengl->ue_source);
+ opengl->ue_source = 0;
+ }
+ G_OBJECT_CLASS(gis_opengl_parent_class)->dispose(_opengl);
}
-void gis_opengl_end(GisOpenGL *self)
+static void gis_opengl_finalize(GObject *_opengl)
{
- g_assert(GIS_IS_OPENGL(self));
- GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
- gdk_gl_drawable_gl_end(gldrawable);
+ g_debug("GisOpenGL: finalize");
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ roam_sphere_free(opengl->sphere);
+ g_tree_destroy(opengl->objects);
+ g_mutex_free(opengl->objects_lock);
+ g_mutex_free(opengl->sphere_lock);
+ G_OBJECT_CLASS(gis_opengl_parent_class)->finalize(_opengl);
}
-void gis_opengl_flush(GisOpenGL *self)
+static void gis_opengl_class_init(GisOpenGLClass *klass)
{
- g_assert(GIS_IS_OPENGL(self));
- GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
- if (gdk_gl_drawable_is_double_buffered(gldrawable))
- gdk_gl_drawable_swap_buffers(gldrawable);
- else
- glFlush();
- gdk_gl_drawable_gl_end(gldrawable);
+ g_debug("GisOpenGL: class_init");
+ GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
+ gobject_class->finalize = gis_opengl_finalize;
+ gobject_class->dispose = gis_opengl_dispose;
+
+ GisViewerClass *viewer_class = GIS_VIEWER_CLASS(klass);
+ viewer_class->center_position = gis_opengl_center_position;
+ viewer_class->project = gis_opengl_project;
+ viewer_class->clear_height_func = gis_opengl_clear_height_func;
+ viewer_class->set_height_func = gis_opengl_set_height_func;
+ viewer_class->add = gis_opengl_add;
+ viewer_class->remove = gis_opengl_remove;
}