X-Git-Url: http://pileus.org/git/?p=grits;a=blobdiff_plain;f=src%2Fgrits-opengl.c;h=0b4100a8f48672401d471895b26df4649b40f848;hp=a42cdab9bc8c966ef06250fa5f486cf05c44a95e;hb=74a55fb8afe07234c705513d324c6cc373e18f8a;hpb=4301f1eb1cad5c6b6805ea44c97202888731a6a6 diff --git a/src/grits-opengl.c b/src/grits-opengl.c index a42cdab..0b4100a 100644 --- a/src/grits-opengl.c +++ b/src/grits-opengl.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2009-2010 Andy Spencer + * Copyright (C) 2009-2011 Andy Spencer * * 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 @@ -24,7 +24,7 @@ * 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 @@ -32,12 +32,10 @@ #include #include #include -#include -#include -#include #include "grits-opengl.h" #include "grits-util.h" +#include "gtkgl.h" #include "roam.h" // #define ROAM_DEBUG @@ -46,18 +44,43 @@ /* 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 { + 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); @@ -116,32 +139,44 @@ static void _set_visuals(GritsOpenGL *opengl) g_mutex_unlock(opengl->sphere_lock); } +static gboolean _foreach_object_cb(gpointer key, gpointer value, gpointer pointers) +{ + struct RenderLevel *level = value; + GFunc user_func = ((gpointer*)pointers)[0]; + gpointer user_data = ((gpointer*)pointers)[1]; + for (GList *cur = level->unsorted.next; cur; cur = cur->next) + user_func(cur->data, user_data); + for (GList *cur = level->sorted.next; cur; cur = cur->next) + user_func(cur->data, user_data); + return FALSE; +} + +static void _foreach_object(GritsOpenGL *opengl, GFunc func, gpointer user_data) +{ + gpointer pointers[2] = {func, user_data}; + g_tree_foreach(opengl->objects, _foreach_object_cb, pointers); +} + +static void _add_object(GritsObject *object, GPtrArray *array) +{ + g_ptr_array_add(array, object); +} + +static GPtrArray *_objects_to_array(GritsOpenGL *opengl) +{ + GPtrArray *array = g_ptr_array_new(); + _foreach_object(opengl, (GFunc)_add_object, array); + 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); @@ -153,22 +188,39 @@ static gboolean on_configure(GritsOpenGL *opengl, GdkEventConfigure *event, gpoi static gboolean _draw_level(gpointer key, gpointer value, gpointer user_data) { - g_debug("GritsOpenGL: _draw_level - level=%-4d", (int)key); GritsOpenGL *opengl = user_data; + glong lnum = (glong)key; struct RenderLevel *level = value; + + g_debug("GritsOpenGL: _draw_level - level=%-4ld", lnum); int nsorted = 0, nunsorted = 0; GList *cur = NULL; - /* Draw opaque objects without sorting */ - glDepthMask(TRUE); - glClear(GL_DEPTH_BUFFER_BIT); + /* Configure individual levels */ + if (lnum < GRITS_LEVEL_WORLD) { + /* Disable depth for background levels */ + glDepthMask(FALSE); + glDisable(GL_ALPHA_TEST); + } else if (lnum < 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); + } + + /* 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); @@ -183,7 +235,9 @@ static gboolean on_expose(GritsOpenGL *opengl, GdkEventExpose *event, gpointer _ { g_debug("GritsOpenGL: on_expose - begin"); - glClear(GL_COLOR_BUFFER_BIT); + gtk_gl_begin(GTK_WIDGET(opengl)); + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); _set_visuals(opengl); #ifdef ROAM_DEBUG @@ -196,23 +250,84 @@ static gboolean on_expose(GritsOpenGL *opengl, GdkEventExpose *event, gpointer _ //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_tree_foreach(opengl->objects, _draw_level, opengl); - } + g_tree_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; } +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; + + /* Configure view */ + gint viewport[4]; + gdouble projection[16]; + glGetIntegerv(GL_VIEWPORT, viewport); + glGetDoublev(GL_PROJECTION_MATRIX, projection); + + glMatrixMode(GL_PROJECTION); + glPushMatrix(); + glLoadIdentity(); + gluPickMatrix(gl_x, gl_y, 2, 2, viewport); + glMultMatrixd(projection); + + /* Prepare for picking */ + guint buffer[100][4] = {}; + glSelectBuffer(G_N_ELEMENTS(buffer), (guint*)buffer); + glRenderMode(GL_SELECT); + glInitNames(); + + /* Run picking */ + g_mutex_lock(opengl->objects_lock); + GPtrArray *objects = _objects_to_array(opengl); + 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); + g_debug("GritsOpenGL: on_motion_notify - hits=%d ev=%.0lf,%.0lf", + hits, gl_x, gl_y); + 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; + } + for (guint i = 0; i < objects->len; i++) { + GritsObject *object = objects->pdata[i]; + grits_object_set_pointer(object, object->state.picked); + } + g_ptr_array_free(objects, 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(); + + return FALSE; +} + static gboolean on_key_press(GritsOpenGL *opengl, GdkEventKey *event, gpointer _) { g_debug("GritsOpenGL: on_key_press - key=%x, state=%x, plus=%x", @@ -234,6 +349,12 @@ static gboolean on_key_press(GritsOpenGL *opengl, GdkEventKey *event, gpointer _ return FALSE; } +static gboolean on_chained_event(GritsOpenGL *opengl, GdkEvent *event, gpointer _) +{ + _foreach_object(opengl, (GFunc)grits_object_event, event); + return FALSE; +} + static gboolean _update_errors_cb(gpointer _opengl) { GritsOpenGL *opengl = _opengl; @@ -271,12 +392,7 @@ static gboolean on_idle(GritsOpenGL *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); @@ -288,6 +404,13 @@ static void on_realize(GritsOpenGL *opengl, gpointer _) 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); @@ -341,6 +464,32 @@ static void grits_opengl_project(GritsViewer *_opengl, 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) { @@ -392,10 +541,10 @@ static gpointer grits_opengl_add(GritsViewer *_opengl, GritsObject *object, 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); + struct RenderLevel *level = g_tree_lookup(opengl->objects, (gpointer)(gintptr)key); if (!level) { level = g_new0(struct RenderLevel, 1); - g_tree_insert(opengl->objects, (gpointer)key, level); + g_tree_insert(opengl->objects, (gpointer)(gintptr)key, level); } GList *list = sort ? &level->sorted : &level->unsorted; /* Put the link in the list */ @@ -410,20 +559,21 @@ static gpointer grits_opengl_add(GritsViewer *_opengl, GritsObject *object, 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; } @@ -432,7 +582,7 @@ static GritsObject *grits_opengl_remove(GritsViewer *_opengl, gpointer _link) ****************/ static int _objects_cmp(gconstpointer _a, gconstpointer _b, gpointer _) { - gint a = (int)_a, b = (int)_b; + gintptr a = (gintptr)_a, b = (gintptr)_b; return a < b ? -1 : a > b ? 1 : 0; } @@ -454,20 +604,9 @@ static void grits_opengl_init(GritsOpenGL *opengl) 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) { @@ -507,6 +646,7 @@ static void grits_opengl_class_init(GritsOpenGLClass *klass) 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;