1 files changed, 50 insertions, 0 deletions
diff --git a/scene/3d/immediate_geometry.cpp b/scene/3d/immediate_geometry.cpp
index 1459f2c362..a4206894ff 100644
--- a/scene/3d/immediate_geometry.cpp
+++ b/scene/3d/immediate_geometry.cpp
@@ -72,6 +72,53 @@ DVector<Face3> ImmediateGeometry::get_faces(uint32_t p_usage_flags) const {
 	return DVector<Face3>();
 }
 
+
+
+void ImmediateGeometry::add_sphere(int p_lats,int p_lons,float p_radius) {
+
+	for(int i = 1; i <= p_lats; i++) {
+		double lat0 = Math_PI * (-0.5 + (double) (i - 1) / p_lats);
+		double z0  = Math::sin(lat0);
+		double zr0 =  Math::cos(lat0);
+
+		double lat1 = Math_PI * (-0.5 + (double) i / p_lats);
+		double z1 = Math::sin(lat1);
+		double zr1 = Math::cos(lat1);
+
+		for(int j = p_lons; j >= 1; j--) {
+
+			double lng0 = 2 * Math_PI * (double) (j - 1) / p_lons;
+			double x0 = Math::cos(lng0);
+			double y0 = Math::sin(lng0);
+
+			double lng1 = 2 * Math_PI * (double) (j) / p_lons;
+			double x1 = Math::cos(lng1);
+			double y1 = Math::sin(lng1);
+
+
+			Vector3 v[4]={
+				Vector3(x1 * zr0, z0, y1 *zr0),
+				Vector3(x1 * zr1, z1, y1 *zr1),
+				Vector3(x0 * zr1, z1, y0 *zr1),
+				Vector3(x0 * zr0, z0, y0 *zr0)
+			};
+
+#define ADD_POINT(m_idx)\
+	set_normal(v[m_idx]);\
+	add_vertex(v[m_idx]*p_radius);
+
+			ADD_POINT(0);
+			ADD_POINT(1);
+			ADD_POINT(2);
+
+			ADD_POINT(2);
+			ADD_POINT(3);
+			ADD_POINT(0);
+		}
+	}
+
+}
+
 void ImmediateGeometry::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("begin","primitive","texture:Texture"),&ImmediateGeometry::begin);
@@ -81,11 +128,14 @@ void ImmediateGeometry::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("set_uv","uv"),&ImmediateGeometry::set_uv);
 	ObjectTypeDB::bind_method(_MD("set_uv2","uv"),&ImmediateGeometry::set_uv2);
 	ObjectTypeDB::bind_method(_MD("add_vertex","color"),&ImmediateGeometry::add_vertex);
+	ObjectTypeDB::bind_method(_MD("add_sphere","lats","lons","radius"),&ImmediateGeometry::add_sphere);
 	ObjectTypeDB::bind_method(_MD("end"),&ImmediateGeometry::end);
 	ObjectTypeDB::bind_method(_MD("clear"),&ImmediateGeometry::clear);
 
 }
 
+
+
 ImmediateGeometry::ImmediateGeometry() {
 
 	im = VisualServer::get_singleton()->immediate_create();