/*
- * Copyright (C) 2009-201
0 Andy Spencer <andy753421@gmail.com>
+ * Copyright (C) 2009-201
1 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
* algorithm for updating surface mesh the planet. The only thing GritsOpenGL
* can actually render on it's own is a wireframe of a sphere.
*
- * GritsOpenGL relies on #GtkGlExt and requires (at least) OpenGL 2.0.
+ * GritsOpenGL requires (at least) OpenGL 2.0.
*/
#include <config.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 "grits-opengl.h"
#include "grits-util.h"
+#include "gtkgl.h"
#include "roam.h"
// #define ROAM_DEBUG
/* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
/* http://www.opengl.org/wiki/Alpha_Blending */
+/* 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 {
+ gint num;
+ GList unsorted;
+ GList sorted;
+};
+
/***********
* Helpers *
***********/
static void _set_visuals(GritsOpenGL *opengl)
{
+ double lat, lon, elev, rx, ry, rz;
+ grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev);
+ grits_viewer_get_rotation(GRITS_VIEWER(opengl), &rx, &ry, &rz);
+
+ /* Set projection and clipping planes */
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+
+ double width = GTK_WIDGET(opengl)->allocation.width;
+ double height = GTK_WIDGET(opengl)->allocation.height;
+ double ang = atan((height/2)/FOV_DIST)*2;
+ double atmos = 100000;
+ double near = MAX(elev*0.75 - atmos, 50); // View 100km of atmosphere
+ double far = elev + 2*EARTH_R + atmos; // on both sides of the earth
+
+ grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev);
+ glViewport(0, 0, width, height);
+ gluPerspective(rad2deg(ang), width/height, near, far);
+
+ /* Setup camera and lighting */
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* Camera 1 */
- double lat, lon, elev, rx, ry, rz;
- grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev);
- grits_viewer_get_rotation(GRITS_VIEWER(opengl), &rx, &ry, &rz);
glRotatef(rx, 1, 0, 0);
glRotatef(rz, 0, 0, 1);
g_mutex_unlock(opengl->sphere_lock);
}
+static GPtrArray *_objects_to_array(GritsOpenGL *opengl, gboolean ortho)
+{
+ GPtrArray *array = g_ptr_array_new();
+ for (GList *i = opengl->objects->head; i; i = i->next) {
+ struct RenderLevel *level = i->data;
+ if ((ortho == TRUE && level->num < GRITS_LEVEL_HUD) ||
+ (ortho == FALSE && level->num >= GRITS_LEVEL_HUD))
+ continue;
+ for (GList *j = level->unsorted.next; j; j = j->next)
+ g_ptr_array_add(array, j->data);
+ for (GList *j = level->sorted.next; j; j = j->next)
+ g_ptr_array_add(array, j->data);
+ }
+ return array;
+}
/*************
* Callbacks *
*************/
-/* 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(GritsOpenGL *opengl, GdkEventConfigure *event, gpointer _)
{
g_debug("GritsOpenGL: 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);
-
+ _set_visuals(opengl);
#ifndef ROAM_DEBUG
g_mutex_lock(opengl->sphere_lock);
roam_sphere_update_errors(opengl->sphere);
return FALSE;
}
-static gboolean _draw_level(gpointer key, gpointer value, gpointer user_data)
+static gint run_picking(GritsOpenGL *opengl, GdkEvent *event,
+ GPtrArray *objects, GritsObject **top)
{
- g_debug("GritsOpenGL: _draw_level - level=%-4d", (int)key);
- GritsOpenGL *opengl = user_data;
- struct RenderLevel *level = value;
+ /* Setup picking buffers */
+ guint buffer[100][4] = {};
+ glSelectBuffer(G_N_ELEMENTS(buffer), (guint*)buffer);
+ if (!opengl->pickmode)
+ glRenderMode(GL_SELECT);
+ glInitNames();
+
+ /* Render/pick objects */
+ for (guint i = 0; i < objects->len; i++) {
+ glPushName(i);
+ GritsObject *object = objects->pdata[i];
+ object->state.picked = FALSE;
+ grits_object_pick(object, opengl);
+ glPopName();
+ }
+
+ int hits = glRenderMode(GL_RENDER);
+
+ /* Process hits */
+ for (int i = 0; i < hits; i++) {
+ //g_debug("\tHit: %d", i);
+ //g_debug("\t\tcount: %d", buffer[i][0]);
+ //g_debug("\t\tz1: %f", (float)buffer[i][1]/0x7fffffff);
+ //g_debug("\t\tz2: %f", (float)buffer[i][2]/0x7fffffff);
+ //g_debug("\t\tname: %p", (gpointer)buffer[i][3]);
+ guint index = buffer[i][3];
+ GritsObject *object = objects->pdata[index];
+ object->state.picked = TRUE;
+ *top = object;
+ }
+
+ /* Notify objects of pointer movements */
+ for (guint i = 0; i < objects->len; i++) {
+ GritsObject *object = objects->pdata[i];
+ grits_object_set_pointer(object, event, object->state.picked);
+ }
+
+ return hits;
+}
+
+static gboolean on_motion_notify(GritsOpenGL *opengl, GdkEventMotion *event, gpointer _)
+{
+ gdouble height = GTK_WIDGET(opengl)->allocation.height;
+ gdouble gl_x = event->x;
+ gdouble gl_y = height - event->y;
+ gdouble delta = opengl->pickmode ? 200 : 2;
+
+ if (opengl->pickmode) {
+ gtk_gl_begin(GTK_WIDGET(opengl));
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ }
+
+ /* Save matricies */
+ gdouble projection[16];
+ gint viewport[4]; // x=0,y=0,w,h
+ glGetDoublev(GL_PROJECTION_MATRIX, projection);
+ glGetIntegerv(GL_VIEWPORT, viewport);
+ glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ glMatrixMode(GL_PROJECTION); glPushMatrix();
+
+ g_mutex_lock(opengl->objects_lock);
+
+ GritsObject *top = NULL;
+ GPtrArray *ortho = _objects_to_array(opengl, TRUE);
+ GPtrArray *world = _objects_to_array(opengl, FALSE);
+
+ /* Run perspective picking */
+ glMatrixMode(GL_PROJECTION); glLoadIdentity();
+ gluPickMatrix(gl_x, gl_y, delta, delta, viewport);
+ glMultMatrixd(projection);
+ gint world_hits = run_picking(opengl, (GdkEvent*)event, world, &top);
+
+ /* Run ortho picking */
+ glMatrixMode(GL_PROJECTION); glLoadIdentity();
+ gluPickMatrix(gl_x, gl_y, delta, delta, viewport);
+ glMatrixMode(GL_MODELVIEW); glLoadIdentity();
+ glOrtho(0, viewport[2], viewport[3], 0, 1000, -1000);
+ gint ortho_hits = run_picking(opengl, (GdkEvent*)event, ortho, &top);
+
+ /* Update cursor */
+ static GdkCursor *cursor = NULL;
+ static GdkWindow *window = NULL;
+ if (!window || !cursor) {
+ cursor = gdk_cursor_new(GDK_FLEUR);
+ window = gtk_widget_get_window(GTK_WIDGET(opengl));
+ }
+ GdkCursor *topcursor = top && top->cursor ? top->cursor : cursor;
+ gdk_window_set_cursor(window, topcursor);
+
+ g_debug("GritsOpenGL: on_motion_notify - hits=%d/%d,%d/%d ev=%.0lf,%.0lf",
+ world_hits, world->len, ortho_hits, ortho->len, gl_x, gl_y);
+
+ g_ptr_array_free(world, TRUE);
+ g_ptr_array_free(ortho, TRUE);
+
+ g_mutex_unlock(opengl->objects_lock);
+
+
+ /* Test unproject */
+ //gdouble lat, lon, elev;
+ //grits_viewer_unproject(GRITS_VIEWER(opengl),
+ // gl_x, gl_y, -1, &lat, &lon, &elev);
+
+ /* Cleanup */
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
+
+ if (opengl->pickmode)
+ gtk_gl_end(GTK_WIDGET(opengl));
+
+ return FALSE;
+}
+
+static void _draw_level(gpointer _level, gpointer _opengl)
+{
+ GritsOpenGL *opengl = _opengl;
+ struct RenderLevel *level = _level;
+
+ g_debug("GritsOpenGL: _draw_level - level=%-4d", level->num);
int nsorted = 0, nunsorted = 0;
GList *cur = NULL;
- /* Draw opaque objects without sorting */
- glDepthMask(TRUE);
- glClear(GL_DEPTH_BUFFER_BIT);
+ /* Configure individual levels */
+ if (level->num < GRITS_LEVEL_WORLD) {
+ /* Disable depth for background levels */
+ glDepthMask(FALSE);
+ glDisable(GL_ALPHA_TEST);
+ } else if (level->num < GRITS_LEVEL_OVERLAY) {
+ /* Enable depth and alpha for world levels */
+ glEnable(GL_ALPHA_TEST);
+ glAlphaFunc(GL_GREATER, 0.1);
+ glDepthMask(TRUE);
+ } else {
+ /* Disable depth for Overlay/HUD levels */
+ // This causes rendering glitches not sure why..
+ //glDepthMask(FALSE);
+ }
+
+ /* Start ortho */
+ if (level->num >= GRITS_LEVEL_HUD) {
+ glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
+ glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadIdentity();
+ gint win_width = GTK_WIDGET(opengl)->allocation.width;
+ gint win_height = GTK_WIDGET(opengl)->allocation.height;
+ glOrtho(0, win_width, win_height, 0, 1000, -1000);
+ }
+
+ /* Draw unsorted objects without depth testing,
+ * these are polygons, etc, rather than physical objects */
+ glDisable(GL_DEPTH_TEST);
for (cur = level->unsorted.next; cur; cur = cur->next, nunsorted++)
grits_object_draw(GRITS_OBJECT(cur->data), opengl);
- /* Freeze depth buffer and draw transparent objects sorted */
- /* TODO: sorting */
- //glDepthMask(FALSE);
- glAlphaFunc(GL_GREATER, 0.1);
+ /* Draw sorted objects using depth testing
+ * These are things that are actually part of the world */
+ glEnable(GL_DEPTH_TEST);
for (cur = level->sorted.next; cur; cur = cur->next, nsorted++)
grits_object_draw(GRITS_OBJECT(cur->data), opengl);
+ /* End ortho */
+ if (level->num >= GRITS_LEVEL_HUD) {
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ }
+
/* TODO: Prune empty levels */
g_debug("GritsOpenGL: _draw_level - drew %d,%d objects",
nunsorted, nsorted);
- return FALSE;
}
static gboolean on_expose(GritsOpenGL *opengl, GdkEventExpose *event, gpointer _)
{
g_debug("GritsOpenGL: on_expose - begin");
- glClear(GL_COLOR_BUFFER_BIT);
+ if (opengl->pickmode)
+ return on_motion_notify(opengl, (GdkEventMotion*)event, NULL);
+
+ gtk_gl_begin(GTK_WIDGET(opengl));
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
_set_visuals(opengl);
#ifdef ROAM_DEBUG
//roam_sphere_draw_normals(opengl->sphere);
#else
g_mutex_lock(opengl->objects_lock);
- g_tree_foreach(opengl->objects, _draw_level, opengl);
- if (opengl->wireframe) {
- glClear(GL_DEPTH_BUFFER_BIT);
+ if (opengl->wireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- roam_sphere_draw(opengl->sphere);
- }
+ g_queue_foreach(opengl->objects, _draw_level, opengl);
g_mutex_unlock(opengl->objects_lock);
#endif
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
- gdk_gl_drawable_swap_buffers(gldrawable);
+ gtk_gl_end(GTK_WIDGET(opengl));
g_debug("GritsOpenGL: on_expose - end\n");
return FALSE;
opengl->wireframe = !opengl->wireframe;
gtk_widget_queue_draw(GTK_WIDGET(opengl));
}
+ if (kv == GDK_p) {
+ opengl->pickmode = !opengl->pickmode;
+ 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);
return FALSE;
}
+static gboolean on_chained_event(GritsOpenGL *opengl, GdkEvent *event, gpointer _)
+{
+ for (GList *i = opengl->objects->tail; i; i = i->prev) {
+ struct RenderLevel *level = i->data;
+ for (GList *j = level->unsorted.next; j; j = j->next)
+ if (grits_object_event(j->data, event))
+ return TRUE;
+ for (GList *j = level->sorted.next; j; j = j->next)
+ if (grits_object_event(j->data, event))
+ return TRUE;
+ }
+ return FALSE;
+}
+
static gboolean _update_errors_cb(gpointer _opengl)
{
GritsOpenGL *opengl = _opengl;
static void on_realize(GritsOpenGL *opengl, gpointer _)
{
g_debug("GritsOpenGL: on_realize");
-
- /* Start OpenGL */
- 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();
+ gtk_gl_begin(GTK_WIDGET(opengl));
/* Connect signals and idle functions now that opengl is fully initialized */
gtk_widget_add_events(GTK_WIDGET(opengl), GDK_KEY_PRESS_MASK);
g_signal_connect(opengl, "location-changed", G_CALLBACK(on_view_changed), NULL);
g_signal_connect(opengl, "rotation-changed", G_CALLBACK(on_view_changed), NULL);
+ g_signal_connect(opengl, "motion-notify-event", G_CALLBACK(on_motion_notify), NULL);
+ g_signal_connect_after(opengl, "key-press-event", G_CALLBACK(on_chained_event), NULL);
+ g_signal_connect_after(opengl, "key-release-event", G_CALLBACK(on_chained_event), NULL);
+ g_signal_connect_after(opengl, "button-press-event", G_CALLBACK(on_chained_event), NULL);
+ g_signal_connect_after(opengl, "button-release-event", G_CALLBACK(on_chained_event), NULL);
+ g_signal_connect_after(opengl, "motion-notify-event", G_CALLBACK(on_chained_event), NULL);
+
#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);
px, py, pz);
}
+static void grits_opengl_unproject(GritsViewer *_opengl,
+ gdouble px, gdouble py, gdouble pz,
+ gdouble *lat, gdouble *lon, gdouble *elev)
+{
+ GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
+ if (!opengl->sphere->view)
+ return;
+ gdouble x, y, z;
+ if (pz < 0) {
+ gfloat tmp = 0;
+ glReadPixels(px, py, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &tmp);
+ pz = tmp;
+ }
+ gluUnProject(px, py, pz,
+ opengl->sphere->view->model,
+ opengl->sphere->view->proj,
+ opengl->sphere->view->view,
+ &x, &y, &z);
+ xyz2lle(x, y, z, lat, lon, elev);
+ //g_message("GritsOpenGL: unproject - "
+ // "%4.0lf,%4.0lf,(%5.3lf) -> "
+ // "%8.0lf,%8.0lf,%8.0lf -> "
+ // "%6.2lf,%7.2lf,%4.0lf",
+ // px, py, pz, x, y, z, *lat, *lon, *elev);
+}
+
static void grits_opengl_set_height_func(GritsViewer *_opengl, GritsBounds *bounds,
RoamHeightFunc height_func, gpointer user_data, gboolean update)
{
_grits_opengl_clear_height_func_rec(opengl->sphere->roots[i]);
}
+static gint _objects_find(gconstpointer a, gconstpointer b)
+{
+ const struct RenderLevel *level = a;
+ const gint *key = b;
+ return level->num == *key ? 0 : 1;
+}
+
+static gint _objects_sort(gconstpointer _a, gconstpointer _b, gpointer _)
+{
+ const struct RenderLevel *a = _a;
+ const struct RenderLevel *b = _b;
+ return a->num < b->num ? -1 :
+ a->num > b->num ? 1 : 0;
+}
+
+static void _objects_free(gpointer value, gpointer _)
+{
+ 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);
+}
+
static gpointer grits_opengl_add(GritsViewer *_opengl, GritsObject *object,
- gint key, gboolean sort)
+ gint num, gboolean sort)
{
g_assert(GRITS_IS_OPENGL(_opengl));
GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
g_mutex_lock(opengl->objects_lock);
- struct RenderLevel *level = g_tree_lookup(opengl->objects, (gpointer)key);
- if (!level) {
+ struct RenderLevel *level = NULL;
+ GList *tmp = g_queue_find_custom(opengl->objects, &num, _objects_find);
+ if (tmp) {
+ level = tmp->data;
+ } else {
level = g_new0(struct RenderLevel, 1);
- g_tree_insert(opengl->objects, (gpointer)key, level);
+ level->num = num;
+ g_queue_insert_sorted(opengl->objects, level, _objects_sort, NULL);
}
GList *list = sort ? &level->sorted : &level->unsorted;
/* Put the link in the list */
return link;
}
-static GritsObject *grits_opengl_remove(GritsViewer *_opengl, gpointer _link)
+static GritsObject *grits_opengl_remove(GritsViewer *_opengl, GritsObject *object)
{
g_assert(GRITS_IS_OPENGL(_opengl));
GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
+ GList *link = object->ref;
g_mutex_lock(opengl->objects_lock);
- GList *link = _link;
- GritsObject *object = link->data;
/* Just unlink and free it, link->prev is assured */
link->prev->next = link->next;
if (link->next)
link->next->prev = link->prev;
+ g_mutex_unlock(opengl->objects_lock);
+ object->ref = NULL;
+ object->viewer = NULL;
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(GritsOpenGL, grits_opengl, GRITS_TYPE_VIEWER);
static void grits_opengl_init(GritsOpenGL *opengl)
{
g_debug("GritsOpenGL: init");
- opengl->objects = g_tree_new_full(_objects_cmp, NULL, NULL, _objects_free);
+ opengl->objects = g_queue_new();
opengl->objects_lock = g_mutex_new();
opengl->sphere = roam_sphere_new(opengl);
opengl->sphere_lock = g_mutex_new();
-
- /* Set OpenGL before "realize" */
- 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(opengl),
- glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
- g_error("GL lacks required capabilities");
- g_object_unref(glconfig);
-
- /* Finish OpenGL init after it's realized */
- g_signal_connect(opengl, "realize", G_CALLBACK(on_realize), NULL);
+ gtk_gl_enable(GTK_WIDGET(opengl));
+ gtk_widget_add_events(GTK_WIDGET(opengl), GDK_KEY_PRESS_MASK);
+ g_signal_connect(opengl, "map", G_CALLBACK(on_realize), NULL);
}
static void grits_opengl_dispose(GObject *_opengl)
{
g_debug("GritsOpenGL: finalize");
GritsOpenGL *opengl = GRITS_OPENGL(_opengl);
roam_sphere_free(opengl->sphere);
- g_tree_destroy(opengl->objects);
+ g_queue_foreach(opengl->objects, _objects_free, NULL);
+ g_queue_free(opengl->objects);
g_mutex_free(opengl->objects_lock);
g_mutex_free(opengl->sphere_lock);
G_OBJECT_CLASS(grits_opengl_parent_class)->finalize(_opengl);
GritsViewerClass *viewer_class = GRITS_VIEWER_CLASS(klass);
viewer_class->center_position = grits_opengl_center_position;
viewer_class->project = grits_opengl_project;
+ viewer_class->unproject = grits_opengl_unproject;
viewer_class->clear_height_func = grits_opengl_clear_height_func;
viewer_class->set_height_func = grits_opengl_set_height_func;
viewer_class->add = grits_opengl_add;
projects / grits / blobdiff