#include "grits-object.h"
+/* Constants */
+enum {
+ SIG_ENTER,
+ SIG_LEAVE,
+ NUM_SIGNALS,
+};
+static guint signals[NUM_SIGNALS];
-/**
- * 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)
+void grits_object_pickdraw(GritsObject *object, GritsOpenGL *opengl, gboolean pick)
{
GritsObjectClass *klass = GRITS_OBJECT_GET_CLASS(object);
if (!klass->draw) {
if (object->hidden)
return;
- /* Skip out of range objects */
- if (object->lod > 0) {
+ /* Support GritsTester */
+ if (!GRITS_IS_OPENGL(opengl)) {
+ g_debug("GritsObject: draw - drawing raw object");
+ klass->draw(object, opengl);
+ return;
+ }
+
+ /* Calculae distance for LOD and horizon tests */
+ GritsPoint *center = &object->center;
+ if ((!(object->skip & GRITS_SKIP_LOD) ||
+ !(object->skip & GRITS_SKIP_HORIZON)) &&
+ (center->elev != -EARTH_R)) {
/* LOD test */
gdouble eye[3], obj[3];
- grits_viewer_get_location(GRITS_VIEWER(opengl), &eye[0], &eye[1], &eye[2]);
+ grits_viewer_get_location(GRITS_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]);
+ lle2xyz(eye[0], eye[1], eye[2],
+ &eye[0], &eye[1], &eye[2]);
+ lle2xyz(center->lat, center->lon, 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;
+ /* Level of detail test */
+ if (!(object->skip & GRITS_SKIP_LOD)
+ && object->lod > 0) {
+ if (object->lod < dist)
+ return;
+ }
+
+ /* Horizon test */
+ if (!(object->skip & GRITS_SKIP_HORIZON)) {
+ gdouble c = EARTH_R+elev;
+ gdouble a = EARTH_R;
+ gdouble horizon = sqrt(c*c - a*a);
+ if (dist > horizon)
+ return;
+ }
}
/* Save state, draw, restore state */
g_mutex_lock(opengl->sphere_lock);
- glPushAttrib(GL_ALL_ATTRIB_BITS);
- glMatrixMode(GL_PROJECTION); glPushMatrix();
- glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ if (!(object->skip & GRITS_SKIP_STATE)) {
+ glPushAttrib(GL_ALL_ATTRIB_BITS);
+ glMatrixMode(GL_PROJECTION); glPushMatrix();
+ glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ }
- klass->draw(object, opengl);
+ if (!(object->skip & GRITS_SKIP_CENTER))
+ grits_viewer_center_position(GRITS_VIEWER(opengl),
+ object->center.lat,
+ object->center.lon,
+ object->center.elev);
- glPopAttrib();
- glMatrixMode(GL_PROJECTION); glPopMatrix();
- glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ if (pick && klass->pick)
+ klass->pick(object, opengl);
+ else
+ klass->draw(object, opengl);
+
+ if (!(object->skip & GRITS_SKIP_STATE)) {
+ glPopAttrib();
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ }
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);
+ object->hidden = hidden;
+ if (klass->hide)
+ klass->hide(object, hidden);
+}
+
+void grits_object_queue_draw(GritsObject *object)
+{
+ if (object->viewer)
+ 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)
{
+ object->center.lat = 0;
+ object->center.lon = 0;
+ object->center.elev = -EARTH_R;
}
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);
}
projects / grits / blobdiff