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Merge pull request #545 from acq4/transform-update

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Transform3D map() update
This commit is contained in:
Luke Campagnola 2017-09-03 22:32:32 -07:00 committed by GitHub
commit 8d730f07d9
1 changed files with 15 additions and 2 deletions
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15
pyqtgraph/Transform3D.py
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@ -1,13 +1,19 @@
# -*- coding: utf-8 -*-
from .Qt import QtCore, QtGui
from . import functions as fn
from .Vector import Vector
import numpy as np
class Transform3D(QtGui.QMatrix4x4):
"""
Extension of QMatrix4x4 with some helpful methods added.
"""
def __init__(self, *args):
if len(args) == 1 and 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.")
QtGui.QMatrix4x4.__init__(self, *args)
def matrix(self, nd=3):
@ -25,8 +31,15 @@ class Transform3D(QtGui.QMatrix4x4):
"""
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):
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 = QtGui.QMatrix4x4.map(self, Vector(obj))
return np.array([v.x(), v.y(), v.z()])[:obj.shape[0]]
elif isinstance(obj, (list, tuple)):
v = QtGui.QMatrix4x4.map(self, Vector(obj))
return type(obj)([v.x(), v.y(), v.z()])[:len(obj)]
else:
return QtGui.QMatrix4x4.map(self, obj)