def _snapEndPointToStandardAxis(self):
"""
Snap the second endpoint of the line so that it lies on the nearest
axis vector. (if its close enough) . This functions keeps the uses the
current rubberband line vector and just extends the second end point
so that it lies at the intersection of the nearest axis vector and the
rcurrent rubberband line vector.
@return: The new endPoint2 i.e. the moving endpoint of the rubberband
line . This value may be same as previous or snapped to lie on
the nearest axis (if one exists)
@rtype: B{A}
"""
x_axis = V(1, 0, 0)
y_axis = V(0, 1, 0)
z_axis = V(0, 0, 1)
endPoint2 = self.endPoint2
currentLineVector = norm(self.endPoint2 - self.endPoint1)
theta_x = angleBetween(x_axis, self.endPoint2)
theta_y = angleBetween(y_axis, self.endPoint2)
theta_z = angleBetween(z_axis, self.endPoint2)
theta_x = min(theta_x, (180 - theta_x))
theta_y = min(theta_y, (180 - theta_y))
theta_z = min(theta_z, (180 - theta_z))
theta = min(theta_x, theta_y, theta_z)
if theta < 2.0:
if theta == theta_x:
self._standardAxisVectorForDrawingSnapReference = x_axis
elif theta == theta_y:
self._standardAxisVectorForDrawingSnapReference = y_axis
elif theta == theta_z:
self._standardAxisVectorForDrawingSnapReference = z_axis
endPoint2 = ptonline(self.endPoint2,
V(0, 0, 0),
self._standardAxisVectorForDrawingSnapReference)
else:
self._standardAxisVectorForDrawingSnapReference = None
return endPoint2
def _snapEndPointToStandardAxis(self):
"""
Snap the second endpoint of the line so that it lies on the nearest
axis vector. (if its close enough) . This functions keeps the uses the
current rubberband line vector and just extends the second end point
so that it lies at the intersection of the nearest axis vector and the
rcurrent rubberband line vector.
@return: The new endPoint2 i.e. the moving endpoint of the rubberband
line . This value may be same as previous or snapped to lie on
the nearest axis (if one exists)
@rtype: B{A}
"""
x_axis = V(1, 0, 0)
y_axis = V(0, 1, 0)
z_axis = V(0, 0, 1)
endPoint2 = self.endPoint2
currentLineVector = norm(self.endPoint2 - self.endPoint1)
theta_x = angleBetween(x_axis, self.endPoint2)
theta_y = angleBetween(y_axis, self.endPoint2)
theta_z = angleBetween(z_axis, self.endPoint2)
theta_x = min(theta_x, (180 - theta_x))
theta_y = min(theta_y, (180 - theta_y))
theta_z = min(theta_z, (180 - theta_z))
theta = min(theta_x, theta_y, theta_z)
if theta < 2.0:
if theta == theta_x:
self._standardAxisVectorForDrawingSnapReference = x_axis
elif theta == theta_y:
self._standardAxisVectorForDrawingSnapReference = y_axis
elif theta == theta_z:
self._standardAxisVectorForDrawingSnapReference = z_axis
endPoint2 = ptonline(
self.endPoint2, V(0, 0, 0),
self._standardAxisVectorForDrawingSnapReference)
else:
self._standardAxisVectorForDrawingSnapReference = None
return endPoint2
def getHandlePoint(self, hdl, event):
#First compute the intersection point of the mouseray with the plane
#This will be our first self.handle_MovePt upon left down.
#This value is further used in handleLeftDrag. -- Ninad 20070531
p1, p2 = self.glpane.mousepoints(event)
linePoint = p2
lineVector = norm(p2 - p1)
planeAxis = self.getaxis()
planeNorm = norm(planeAxis)
planePoint = self.center
#Find out intersection of the mouseray with the plane.
intersection = planeXline(planePoint, planeNorm, linePoint, lineVector)
if intersection is None:
intersection = ptonline(planePoint, linePoint, lineVector)
handlePoint = intersection
return handlePoint
def getHandlePoint(self, hdl, event):
#First compute the intersection point of the mouseray with the plane
#This will be our first self.handle_MovePt upon left down.
#This value is further used in handleLeftDrag. -- Ninad 20070531
p1, p2 = self.glpane.mousepoints(event)
linePoint = p2
lineVector = norm(p2 - p1)
planeAxis = self.getaxis()
planeNorm = norm(planeAxis)
planePoint = self.center
#Find out intersection of the mouseray with the plane.
intersection = planeXline(planePoint, planeNorm, linePoint, lineVector)
if intersection is None:
intersection = ptonline(planePoint, linePoint, lineVector)
handlePoint = intersection
return handlePoint
