/*
- * 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-/* Tessellation, "finding intersecting triangles" */
-/* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
-/* http://www.opengl.org/wiki/Alpha_Blending */
+/**
+ * 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/glu.h>
#include "gis-opengl.h"
+#include "gis-util.h"
#include "roam.h"
-#define FOV_DIST 2000.0
-#define MPPX(dist) (4*dist/FOV_DIST)
+#include "objects/gis-object.h"
+#include "objects/gis-marker.h"
+#include "objects/gis-callback.h"
// #define ROAM_DEBUG
-/*************
- * ROAM Code *
- *************/
-static void set_visuals(GisOpenGL *self)
+/* 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)
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* Camera 1 */
double lat, lon, elev, rx, ry, rz;
- gis_view_get_location(self->view, &lat, &lon, &elev);
- gis_view_get_rotation(self->view, &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);
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[] = {0.0, 0.0, 0.0, 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);
glRotatef(lat, 1, 0, 0);
glRotatef(-lon, 0, 1, 0);
- /* Misc */
- gdouble rg = MAX(0, 1-(elev/20000));
- gdouble blue = MAX(0, 1-(elev/50000));
- glClearColor(MIN(0.65,rg), MIN(0.65,rg), MIN(1,blue), 1.0f);
- glColor4f(1, 1, 1, 1);
-
glDisable(GL_ALPHA_TEST);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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);
+}
+
+
+/********************
+ * Object handleing *
+ ********************/
+static void _draw_tile(GisOpenGL *opengl, GisTile *tile, GList *triangles)
+{
+ 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);
+ 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);
+ 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();
+ }
+ g_list_free(triangles);
+}
+
+static void _draw_tiles(GisOpenGL *opengl, GisTile *tile)
+{
+ /* 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 (triangles)
+ _draw_tile(opengl, tile, 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 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 */
+ 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);
+ }
+ glPopAttrib();
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
+}
+
+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 _unload_object(GisOpenGL *opengl, GisObject *object)
+{
+ g_debug("GisOpenGL: unload_object");
+ if (GIS_IS_MARKER(object)) {
+ GisMarker *marker = GIS_MARKER(object);
+ glDeleteTextures(1, &marker->tex);
+ }
}
/*************
* Callbacks *
*************/
-static void on_realize(GisOpenGL *self, gpointer _)
-{
- g_debug("GisOpenGL: on_realize");
- set_visuals(self);
- roam_sphere_update_errors(self->sphere);
-}
-static gboolean on_configure(GisOpenGL *self, GdkEventConfigure *event, gpointer _)
+/* 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_configure");
- gis_opengl_begin(self);
- double width = GTK_WIDGET(self)->allocation.width;
- double height = GTK_WIDGET(self)->allocation.height;
- glViewport(0, 0, width, height);
+ 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, 1, 20*EARTH_R);
+ gluPerspective(rad2deg(ang)*2, width/height, 1, 10*EARTH_R);
#ifndef ROAM_DEBUG
- roam_sphere_update_errors(self->sphere);
+ g_mutex_lock(opengl->sphere_lock);
+ roam_sphere_update_errors(opengl->sphere);
+ g_mutex_unlock(opengl->sphere_lock);
#endif
- gis_opengl_end(self);
return FALSE;
}
-static void on_expose_plugin(GisPlugin *plugin, gchar *name, GisOpenGL *self)
+static void on_realize(GisOpenGL *opengl, gpointer _)
{
- set_visuals(self);
- glMatrixMode(GL_PROJECTION); glPushMatrix();
- glMatrixMode(GL_MODELVIEW); glPushMatrix();
- gis_plugin_expose(plugin);
- glMatrixMode(GL_PROJECTION); glPopMatrix();
- glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ 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);
+ 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;
}
-static gboolean on_expose(GisOpenGL *self, GdkEventExpose *event, gpointer _)
+
+static gboolean on_expose(GisOpenGL *opengl, GdkEventExpose *event, gpointer _)
{
g_debug("GisOpenGL: on_expose - begin");
- gis_opengl_begin(self);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glClear(GL_COLOR_BUFFER_BIT);
-#ifndef ROAM_DEBUG
- gis_plugins_foreach(self->plugins, G_CALLBACK(on_expose_plugin), self);
-
- if (self->wireframe) {
- set_visuals(self);
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- roam_sphere_draw(self->sphere);
- }
-#else
- set_visuals(self);
+ _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(self->sphere);
-
- //roam_sphere_draw_normals(self->sphere);
+ roam_sphere_draw(opengl->sphere);
+ //roam_sphere_draw_normals(opengl->sphere);
+#else
+ g_tree_foreach(opengl->objects, _draw_level, opengl);
+ if (opengl->wireframe) {
+ glClear(GL_DEPTH_BUFFER_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ roam_sphere_draw(opengl->sphere);
+ }
#endif
- set_visuals(self);
- gis_opengl_end(self);
- gis_opengl_flush(self);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
+ gdk_gl_drawable_swap_buffers(gldrawable);
+
g_debug("GisOpenGL: on_expose - end\n");
return FALSE;
}
-static gboolean on_button_press(GisOpenGL *self, GdkEventButton *event, gpointer _)
-{
- g_debug("GisOpenGL: on_button_press - Grabbing focus");
- gtk_widget_grab_focus(GTK_WIDGET(self));
- return TRUE;
-}
-
-static gboolean on_key_press(GisOpenGL *self, GdkEventKey *event, gpointer _)
+static gboolean on_key_press(GisOpenGL *opengl, GdkEventKey *event, gpointer _)
{
g_debug("GisOpenGL: on_key_press - key=%x, state=%x, plus=%x",
event->keyval, event->state, GDK_plus);
- double lat, lon, elev, pan;
- gis_view_get_location(self->view, &lat, &lon, &elev);
- pan = MIN(elev/(EARTH_R/2), 30);
guint kv = event->keyval;
gdk_threads_leave();
- if (kv == GDK_Left || kv == GDK_h) gis_view_pan(self->view, 0, -pan, 0);
- else if (kv == GDK_Down || kv == GDK_j) gis_view_pan(self->view, -pan, 0, 0);
- else if (kv == GDK_Up || kv == GDK_k) gis_view_pan(self->view, pan, 0, 0);
- else if (kv == GDK_Right || kv == GDK_l) gis_view_pan(self->view, 0, pan, 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, 0, -2);
- else if (kv == GDK_J) gis_view_rotate(self->view, 2, 0, 0);
- else if (kv == GDK_K) gis_view_rotate(self->view, -2, 0, 0);
- else if (kv == GDK_L) gis_view_rotate(self->view, 0, 0, 2);
-
/* Testing */
- else if (kv == GDK_w) {self->wireframe = !self->wireframe; gtk_widget_queue_draw(GTK_WIDGET(self));}
+ 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(self->sphere);
- else if (kv == GDK_p) roam_sphere_merge_one(self->sphere);
- else if (kv == GDK_r) roam_sphere_split_merge(self->sphere);
- else if (kv == GDK_u) roam_sphere_update_errors(self->sphere);
+ 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);
gdk_threads_enter();
- gtk_widget_queue_draw(GTK_WIDGET(self));
+ gtk_widget_queue_draw(GTK_WIDGET(opengl));
#else
gdk_threads_enter();
#endif
-
- return TRUE;
+ return FALSE;
}
-static gboolean _update_errors_cb(gpointer sphere)
+static gboolean _update_errors_cb(gpointer _opengl)
{
- roam_sphere_update_errors(sphere);
+ 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(GisView *view,
- gdouble _1, gdouble _2, gdouble _3, GisOpenGL *self)
+static void on_view_changed(GisOpenGL *opengl,
+ gdouble _1, gdouble _2, gdouble _3)
{
g_debug("GisOpenGL: on_view_changed");
- gdk_threads_enter();
- gis_opengl_begin(self);
- set_visuals(self);
+ _set_visuals(opengl);
#ifndef ROAM_DEBUG
- g_idle_add_full(G_PRIORITY_HIGH_IDLE+30, _update_errors_cb, self->sphere, NULL);
- //roam_sphere_update_errors(self->sphere);
+ 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
- gis_opengl_redraw(self);
- gis_opengl_end(self);
- gdk_threads_leave();
}
-static gboolean on_idle(GisOpenGL *self)
+static gboolean on_idle(GisOpenGL *opengl)
{
//g_debug("GisOpenGL: on_idle");
gdk_threads_enter();
- gis_opengl_begin(self);
- if (roam_sphere_split_merge(self->sphere))
- gis_opengl_redraw(self);
- gis_opengl_end(self);
+ 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);
gdk_threads_leave();
return TRUE;
}
-/***********
- * Methods *
- ***********/
-GisOpenGL *gis_opengl_new(GisWorld *world, GisView *view, GisPlugins *plugins)
+/*********************
+ * 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");
- GisOpenGL *self = g_object_new(GIS_TYPE_OPENGL, NULL);
- self->world = world;
- self->view = view;
- self->plugins = plugins;
- g_object_ref(world);
- g_object_ref(view);
-
- g_signal_connect(self->view, "location-changed", G_CALLBACK(on_view_changed), self);
- g_signal_connect(self->view, "rotation-changed", G_CALLBACK(on_view_changed), self);
-
- self->sphere = roam_sphere_new(self);
-
- return g_object_ref(self);
+ GisViewer *opengl = g_object_new(GIS_TYPE_OPENGL, NULL);
+ gis_viewer_setup(opengl, plugins, prefs);
+ return opengl;
}
-void gis_opengl_center_position(GisOpenGL *self, gdouble lat, gdouble lon, gdouble elev)
+static void gis_opengl_center_position(GisViewer *_opengl, gdouble lat, gdouble lon, gdouble elev)
{
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
glRotatef(lon, 0, 1, 0);
glRotatef(-lat, 1, 0, 0);
glTranslatef(0, 0, elev2rad(elev));
}
-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)
+static void gis_opengl_project(GisViewer *_opengl,
+ gdouble lat, gdouble lon, gdouble elev,
+ gdouble *px, gdouble *py, gdouble *pz)
{
- /* 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);
+ 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);
}
-void gis_opengl_set_height_func(GisOpenGL *self, GisTile *tile,
+static void gis_opengl_set_height_func(GisViewer *_opengl, GisTile *tile,
RoamHeightFunc height_func, gpointer user_data, gboolean update)
{
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
if (!tile)
return;
/* TODO: get points? */
- GList *triangles = roam_sphere_get_intersect(self->sphere,
+ g_mutex_lock(opengl->sphere_lock);
+ GList *triangles = roam_sphere_get_intersect(opengl->sphere, TRUE,
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]);
+ if (tile->edge.n >= points[i]->lat && points[i]->lat >= tile->edge.s &&
+ tile->edge.e >= points[i]->lon && points[i]->lon >= tile->edge.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);
}
static void _gis_opengl_clear_height_func_rec(RoamTriangle *root)
_gis_opengl_clear_height_func_rec(root->kids[0]);
_gis_opengl_clear_height_func_rec(root->kids[1]);
}
-void gis_opengl_clear_height_func(GisOpenGL *self)
-{
- for (int i = 0; i < G_N_ELEMENTS(self->sphere->roots); i++)
- _gis_opengl_clear_height_func_rec(self->sphere->roots[i]);
-}
-void gis_opengl_redraw(GisOpenGL *self)
+static void gis_opengl_clear_height_func(GisViewer *_opengl)
{
- g_debug("GisOpenGL: redraw");
- gtk_widget_queue_draw(GTK_WIDGET(self));
+ 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 gis_opengl_begin(GisOpenGL *self)
-{
- g_assert(GIS_IS_OPENGL(self));
-
- GdkGLContext *glcontext = gtk_widget_get_gl_context(GTK_WIDGET(self));
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self));
- if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
- g_assert_not_reached();
-}
-void gis_opengl_end(GisOpenGL *self)
+static gpointer gis_opengl_add(GisViewer *_opengl, GisObject *object,
+ gint key, gboolean sort)
{
- g_assert(GIS_IS_OPENGL(self));
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self));
- gdk_gl_drawable_gl_end(gldrawable);
+ g_assert(GIS_IS_OPENGL(_opengl));
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ _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 *next = g_new0(GList, 1);
+ next->data = object;
+ next->prev = list;
+ next->next = list->next;
+ list->next = next;
+ return next;
}
-void gis_opengl_flush(GisOpenGL *self)
+
+static GisObject *gis_opengl_remove(GisViewer *_opengl, gpointer _link)
{
- g_assert(GIS_IS_OPENGL(self));
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(self));
- if (gdk_gl_drawable_is_double_buffered(gldrawable))
- gdk_gl_drawable_swap_buffers(gldrawable);
- else
- glFlush();
- gdk_gl_drawable_gl_end(gldrawable);
+ g_assert(GIS_IS_OPENGL(_opengl));
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ 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);
+ return object;
}
-
/****************
* GObject code *
****************/
-G_DEFINE_TYPE(GisOpenGL, gis_opengl, GTK_TYPE_DRAWING_AREA);
-static void gis_opengl_init(GisOpenGL *self)
+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 */
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),
+ 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);
- gtk_widget_set_size_request(GTK_WIDGET(self), 600, 550);
- gtk_widget_set_events(GTK_WIDGET(self),
- GDK_BUTTON_PRESS_MASK |
- GDK_ENTER_NOTIFY_MASK |
- GDK_KEY_PRESS_MASK);
- g_object_set(self, "can-focus", TRUE, NULL);
+ opengl->objects = g_tree_new_full(_objects_cmp, NULL, NULL, _objects_free);
+ opengl->sphere = roam_sphere_new(opengl);
+ opengl->sphere_lock = g_mutex_new();
#ifndef ROAM_DEBUG
- self->sm_source[0] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+30, 33, (GSourceFunc)on_idle, self, NULL);
- self->sm_source[1] = g_timeout_add_full(G_PRIORITY_HIGH_IDLE+10, 500, (GSourceFunc)on_idle, self, NULL);
+ 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, "realize", G_CALLBACK(on_realize), NULL);
- g_signal_connect(self, "configure-event", G_CALLBACK(on_configure), NULL);
- g_signal_connect(self, "expose-event", G_CALLBACK(on_expose), NULL);
+ 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);
- g_signal_connect(self, "button-press-event", G_CALLBACK(on_button_press), NULL);
- g_signal_connect(self, "enter-notify-event", G_CALLBACK(on_button_press), NULL);
- g_signal_connect(self, "key-press-event", G_CALLBACK(on_key_press), NULL);
-}
-static GObject *gis_opengl_constructor(GType gtype, guint n_properties,
- GObjectConstructParam *properties)
-{
- g_debug("GisOpengl: constructor");
- GObjectClass *parent_class = G_OBJECT_CLASS(gis_opengl_parent_class);
- return parent_class->constructor(gtype, n_properties, properties);
+ 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);
}
-static void gis_opengl_dispose(GObject *_self)
+static void gis_opengl_dispose(GObject *_opengl)
{
g_debug("GisOpenGL: dispose");
- GisOpenGL *self = GIS_OPENGL(_self);
- if (self->sm_source[0]) {
- g_source_remove(self->sm_source[0]);
- self->sm_source[0] = 0;
- }
- if (self->sm_source[1]) {
- g_source_remove(self->sm_source[1]);
- self->sm_source[1] = 0;
- }
- if (self->sphere) {
- roam_sphere_free(self->sphere);
- self->sphere = NULL;
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ if (opengl->sm_source[0]) {
+ g_source_remove(opengl->sm_source[0]);
+ opengl->sm_source[0] = 0;
}
- if (self->world) {
- g_object_unref(self->world);
- self->world = NULL;
+ if (opengl->sm_source[1]) {
+ g_source_remove(opengl->sm_source[1]);
+ opengl->sm_source[1] = 0;
}
- if (self->view) {
- g_object_unref(self->view);
- self->view = NULL;
+ if (opengl->ue_source) {
+ g_source_remove(opengl->ue_source);
+ opengl->ue_source = 0;
}
- G_OBJECT_CLASS(gis_opengl_parent_class)->dispose(_self);
+ G_OBJECT_CLASS(gis_opengl_parent_class)->dispose(_opengl);
}
-static void gis_opengl_finalize(GObject *_self)
+static void gis_opengl_finalize(GObject *_opengl)
{
g_debug("GisOpenGL: finalize");
- GisOpenGL *self = GIS_OPENGL(_self);
- G_OBJECT_CLASS(gis_opengl_parent_class)->finalize(_self);
+ GisOpenGL *opengl = GIS_OPENGL(_opengl);
+ roam_sphere_free(opengl->sphere);
+ g_tree_destroy(opengl->objects);
+ g_mutex_free(opengl->sphere_lock);
+ G_OBJECT_CLASS(gis_opengl_parent_class)->finalize(_opengl);
}
static void gis_opengl_class_init(GisOpenGLClass *klass)
{
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;
+ 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;
}
projects / grits / blobdiff