Source code for pyqtgraph.Transform3D

import numpy as np

from . import functions as fn
from .Qt import QtGui
from .Vector import Vector

[docs] class Transform3D(QtGui.QMatrix4x4): """ Extension of QMatrix4x4 with some helpful methods added. """ def __init__(self, *args): if len(args) == 1: if isinstance(args[0], (list, tuple, np.ndarray)): args = [x for y in args[0] for x in y] if len(args) != 16: raise TypeError("Single argument to Transform3D must have 16 elements.") elif isinstance(args[0], QtGui.QMatrix4x4): args = list(args[0].copyDataTo()) 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")
[docs] def map(self, obj): """ Extends to allow mapping (3, ...) arrays of coordinates """ if isinstance(obj, np.ndarray) and obj.shape[0] in (2,3): if obj.ndim >= 2: return fn.transformCoordinates(self, obj) elif obj.ndim == 1: v =, Vector(obj)) return np.array([v.x(), v.y(), v.z()])[:obj.shape[0]] elif isinstance(obj, (list, tuple)): v =, Vector(obj)) return type(obj)([v.x(), v.y(), v.z()])[:len(obj)] else: return, obj)
def inverted(self): inv, b = QtGui.QMatrix4x4.inverted(self) return Transform3D(inv), b