pyqtgraph/Transform3D.py
Luke Campagnola b09182d19a GLScatterPlotItem: use shader programs to allow specifying spot size by array
Reorganized shader programs
Infrastructure updates for OpenGL system
2012-10-26 21:47:45 -04:00

35 lines
1.1 KiB
Python

# -*- coding: utf-8 -*-
from .Qt import QtCore, QtGui
import pyqtgraph as pg
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 pg.transformCoordinates(self, obj)
else:
return QtGui.QMatrix4x4.map(self, obj)
def inverted(self):
inv, b = QtGui.QMatrix4x4.inverted(self)
return Transform3D(inv), b