def create_ogl_group(display):
"""
create a group that will store an OpenGL buffer
"""
aStructure = Graphic3d_Structure(display._struc_mgr)
group = Prs3d_Root_CurrentGroup(aStructure)
return aStructure, group
def DisplayMessage(self,
point,
text_to_write,
height=None,
message_color=None,
update=False):
"""
:point: a gp_Pnt or gp_Pnt2d instance
:text_to_write: a string
:message_color: triple with the range 0-1
"""
aStructure = Graphic3d_Structure(self._struc_mgr)
text_aspect = Prs3d_TextAspect()
if message_color is not None:
text_aspect.SetColor(rgb_color(*message_color))
if height is not None:
text_aspect.SetHeight(height)
if isinstance(point, gp_Pnt2d):
point = gp_Pnt(point.X(), point.Y(), 0)
Prs3d_Text.Draw(aStructure, text_aspect, to_string(text_to_write),
point)
aStructure.Display()
# @TODO: it would be more coherent if a AIS_InteractiveObject
# is be returned
if update:
self.Repaint()
return aStructure
def DisplayVector(self, vec, pnt, update=False):
"""displays a vector as an arrow"""
if self._inited:
aStructure = Graphic3d_Structure(self._struc_mgr)
pnt_as_vec = gp_Vec(pnt.X(), pnt.Y(), pnt.Z())
start = pnt_as_vec + vec
pnt_start = gp_Pnt(start.X(), start.Y(), start.Z())
Prs3d_Arrow.Draw(aStructure, pnt_start, gp_Dir(vec),
math.radians(20), vec.Magnitude())
aStructure.Display()
# it would be more coherent if a AIS_InteractiveObject
# would be returned
if update:
self.Repaint()
return aStructure