/* 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 *
***********/
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);
+}
/*************
* 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");
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);
+ _foreach_object(opengl, (GFunc)grits_object_pick_begin, opengl);
+ 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]);
+ GritsObject *object = GRITS_OBJECT(buffer[i][3]);
+ grits_object_pick_pointer(object, gl_x, gl_y);
+ }
+ _foreach_object(opengl, (GFunc)grits_object_pick_end, NULL);
+ g_mutex_unlock(opengl->objects_lock);
+
+ /* 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",
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);
#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);
#include "grits-object.h"
-
-/**
- * grits_object_draw:
- * @object: the object
- * @opengl: the viewer the object is being displayed in
- *
- * Perform any OpenGL commands necessasairy to draw the object.
- *
- * The GL_PROJECTION and GL_MODELVIEW matricies and GL_ALL_ATTRIB_BITS will be
- * restored to the default state after the call to draw.
- */
-void grits_object_draw(GritsObject *object, GritsOpenGL *opengl)
+/* Constants */
+enum {
+ SIG_ENTER,
+ SIG_LEAVE,
+ NUM_SIGNALS,
+};
+static guint signals[NUM_SIGNALS];
+
+void grits_object_pickdraw(GritsObject *object, GritsOpenGL *opengl, gboolean pick)
{
GritsObjectClass *klass = GRITS_OBJECT_GET_CLASS(object);
if (!klass->draw) {
object->center.lon,
object->center.elev);
- klass->draw(object, opengl);
+ if (pick && klass->pick)
+ klass->pick(object, opengl);
+ else
+ klass->draw(object, opengl);
if (!(object->skip & GRITS_SKIP_STATE)) {
glPopAttrib();
g_mutex_unlock(opengl->sphere_lock);
}
+/**
+ * grits_object_draw:
+ * @object: the object
+ * @opengl: the viewer the object is being displayed in
+ *
+ * Perform any OpenGL commands necessasairy to draw the object.
+ *
+ * The GL_PROJECTION and GL_MODELVIEW matricies and GL_ALL_ATTRIB_BITS will be
+ * restored to the default state after the call to draw.
+ */
+void grits_object_draw(GritsObject *object, GritsOpenGL *opengl)
+{
+ grits_object_pickdraw(object, opengl, FALSE);
+}
+
void grits_object_hide(GritsObject *object, gboolean hidden)
{
GritsObjectClass *klass = GRITS_OBJECT_GET_CLASS(object);
gtk_widget_queue_draw(GTK_WIDGET(object->viewer));
}
+/* Event handling */
+void grits_object_pick_begin(GritsObject *object, GritsOpenGL *opengl)
+{
+ object->state.picked = FALSE;
+
+ /* Check for connected signals */
+ for (int i = 0; i < NUM_SIGNALS; i++) {
+ if (g_signal_has_handler_pending(object, signals[i], 0, FALSE)) {
+ /* Someone is watching, render the object _once_ */
+ glPushName((guint)object);
+ grits_object_pickdraw(object, opengl, TRUE);
+ glPopName();
+ return;
+ }
+ }
+}
+
+void grits_object_pick_pointer(GritsObject *object, double x, double y)
+{
+ object->state.picked = TRUE;
+}
+
+void grits_object_pick_end(GritsObject *object)
+{
+ if (object->state.picked) {
+ if (!object->state.selected)
+ g_signal_emit(object, signals[SIG_ENTER], 0);
+ object->state.selected = TRUE;
+ } else {
+ if (object->state.selected)
+ g_signal_emit(object, signals[SIG_LEAVE], 0);
+ object->state.selected = FALSE;
+ }
+}
+
/* GObject stuff */
G_DEFINE_ABSTRACT_TYPE(GritsObject, grits_object, G_TYPE_OBJECT);
static void grits_object_init(GritsObject *object)
static void grits_object_class_init(GritsObjectClass *klass)
{
+ GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
+
+ /**
+ * GritsObject::enter:
+ * @object: the object.
+ *
+ * The ::enter signal is emitted when the pointer moves over the object
+ */
+ signals[SIG_ENTER] = g_signal_new(
+ "enter",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
+
+ /**
+ * GritsViewer::leave:
+ * @object: the object.
+ *
+ * The ::leave signal is emitted when the pointer moves away from the
+ * object
+ */
+ signals[SIG_LEAVE] = g_signal_new(
+ "leave",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
}
#define GRITS_SKIP_CENTER (1<<2)
#define GRITS_SKIP_STATE (1<<3)
+/* Picking states */
+typedef struct {
+ guint picked : 1;
+ guint selected : 1;
+} GritsState;
+
typedef struct _GritsObject GritsObject;
typedef struct _GritsObjectClass GritsObjectClass;
gboolean hidden; // If true, the object will not be drawn
gdouble lod; // Level of detail, used to hide small objects
guint32 skip; // Bit mask of safe operations
+
+ GritsState state; // Internal, used for picking
};
struct _GritsObjectClass {
/* Move some of these to GObject? */
void (*draw) (GritsObject *object, GritsOpenGL *opengl);
+ void (*pick) (GritsObject *object, GritsOpenGL *opengl);
void (*hide) (GritsObject *object, gboolean hidden);
};
void grits_object_hide(GritsObject *object, gboolean hidden);
+/* Interal, used by grits_opengl */
+void grits_object_pick_begin(GritsObject *object, GritsOpenGL *opengl);
+void grits_object_pick_pointer(GritsObject *object, double x, double y);
+void grits_object_pick_end(GritsObject *object);
+
/**
* grits_object_queue_draw:
* @object: The #GritsObject that needs drawing
glPopAttrib();
}
+static void grits_poly_pick(GritsObject *_poly, GritsOpenGL *opengl)
+{
+ //g_debug("GritsPoly: pick");
+ GritsPoly *poly = GRITS_POLY(_poly);
+ if (!poly->list)
+ return;
+ glPushAttrib(GL_ENABLE_BIT);
+ glDisable(GL_CULL_FACE);
+ glCallList(poly->list+0);
+ glPopAttrib();
+}
+
/**
* grits_poly_new:
* @points: TODO
GritsObjectClass *object_class = GRITS_OBJECT_CLASS(klass);
object_class->draw = grits_poly_draw;
+ object_class->pick = grits_poly_pick;
}
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