35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
from .Qt import QtCore, QtGui
|
|
from . import functions as fn
|
|
import numpy as np
|
|
|
|
class Transform3D(QtGui.QMatrix4x4):
|
|
"""
|
|
Extension of QMatrix4x4 with some helpful methods added.
|
|
"""
|
|
def __init__(self, *args):
|
|
QtGui.QMatrix4x4.__init__(self, *args)
|
|
|
|
def matrix(self, nd=3):
|
|
if nd == 3:
|
|
return np.array(self.copyDataTo()).reshape(4,4)
|
|
elif nd == 2:
|
|
m = np.array(self.copyDataTo()).reshape(4,4)
|
|
m[2] = m[3]
|
|
m[:,2] = m[:,3]
|
|
return m[:3,:3]
|
|
else:
|
|
raise Exception("Argument 'nd' must be 2 or 3")
|
|
|
|
def map(self, obj):
|
|
"""
|
|
Extends QMatrix4x4.map() to allow mapping (3, ...) arrays of coordinates
|
|
"""
|
|
if isinstance(obj, np.ndarray) and obj.ndim >= 2 and obj.shape[0] in (2,3):
|
|
return fn.transformCoordinates(self, obj)
|
|
else:
|
|
return QtGui.QMatrix4x4.map(self, obj)
|
|
|
|
def inverted(self):
|
|
inv, b = QtGui.QMatrix4x4.inverted(self)
|
|
return Transform3D(inv), b |