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ViewRotation.FCMacro
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ViewRotation.FCMacro
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# -*- coding: utf-8 -*-
#
# FreeCAD macro ViewRotation.
# This GUI allows the view to be rotated with more precision than when using
# the mouse. Rotation is according to axes fixed with respect to the user and
# not the objects, though the aim is that the objects rotate about their
# approximate shared centre rather than the view centre.
# The GUI defaults to the top right of the screen, this behaviour can be
# changed by editing.
# [http://forum.freecadweb.org/viewtopic.php?f=3&t=1784&hilit=View+Rotation#p12012 View+Rotation]
from __future__ import division
__Name__ = 'View Rotation'
__Comment__ = 'This GUI allows the view to be rotated precisely'
__Author__ = 'Joe Dowsett'
__Version__ = '1.0'
__License__ = 'CC-BY-3.0'
__Web__ = 'https://www.freecadweb.org/wiki/Macro_View_Rotation'
__Wiki__ = 'https://www.freecadweb.org/wiki/Macro_View_Rotation'
__Icon__ = ''
__Help__ = 'Rotation is according to axes fixed with respect to the user.'
__Status__ = ''
__Requires__ = ''
__Files__ = 'ViewRotationOut.png,ViewRotationRight.png,ViewRotationUp.png'
from math import pi
import os
from PySide import QtCore
from PySide import QtGui
from pivy import coin
import FreeCAD as app
import FreeCADGui as gui
def get_macro_dir():
"""Return the directory where macros are located"""
default_macro_dir = os.path.join(app.ConfigGet('UserAppData'), 'Macro')
return app.ParamGet('User parameter:BaseApp/Preferences/Macro').GetString('MacroPath', default_macro_dir)
def find_centre():
doc = app.activeDocument()
if doc is None:
return app.Vector(0, 0, 0)
xmax = 0
xmin = 0
ymax = 0
ymin = 0
zmax = 0
zmin = 0
for obj in doc.Objects:
try:
if obj.TypeId[:4] == 'Mesh':
box = obj.Mesh.BoundBox
elif obj.TypeId[:6] == 'Points':
box = obj.Points.BoundBox
elif obj.TypeId[:4] == 'Part':
box = obj.Shape.BoundBox
else:
continue
except AttributeError:
continue
xmax = max(xmax, box.XMax)
xmin = min(xmin, box.XMin)
ymax = max(ymax, box.YMax)
ymin = min(ymin, box.YMin)
zmax = max(zmax, box.ZMax)
zmin = min(zmin, box.ZMin)
return app.Vector((xmax + xmin) / 2, (ymax + ymin) / 2, (zmax + zmin) / 2)
class RotateGui(QtGui.QWidget):
def __init__(self):
super(RotateGui, self).__init__()
self.init_ui()
self.init_rotate()
def init_ui(self):
macro_dir = get_macro_dir()
self.sliders = []
self.line_edits = []
vbox = QtGui.QVBoxLayout()
icons = ('ViewRotationRight.png', 'ViewRotationUp.png', 'ViewRotationOut.png')
for icon in icons:
slider = QtGui.QSlider(QtCore.Qt.Horizontal, self)
slider.setFocusPolicy(QtCore.Qt.NoFocus)
slider.setSingleStep(5)
slider.setPageStep(15)
slider.setValue(0)
slider.setMaximum(180)
slider.setMinimum(-180)
slider.valueChanged[int].connect(self.valueChange)
self.sliders.append(slider)
line_edit = QtGui.QLineEdit(self)
line_edit.setText('0')
line_edit.setAlignment(QtCore.Qt.AlignRight)
line_edit.returnPressed.connect(self.valueEntered)
self.line_edits.append(line_edit)
label = QtGui.QLabel(self)
label.setPixmap(QtGui.QPixmap(os.path.join(macro_dir, icon)))
hbox = QtGui.QHBoxLayout()
hbox.addWidget(label, 1, QtCore.Qt.AlignCenter)
hbox.addWidget(slider, 4)
hbox.addWidget(line_edit, 1)
vbox.addLayout(hbox)
reset_button = QtGui.QPushButton('Reset')
reset_button.clicked.connect(self.reset)
ok_button = QtGui.QPushButton('OK')
ok_button.clicked.connect(self.close)
cancel_button = QtGui.QPushButton('Cancel')
cancel_button.clicked.connect(self.cancel)
hbox = QtGui.QHBoxLayout()
hbox.addWidget(reset_button, 1)
hbox.addWidget(ok_button, 1)
hbox.addWidget(cancel_button, 1)
vbox.addStretch(1)
vbox.addLayout(hbox)
self.setLayout(vbox)
desktop_widget = QtGui.QDesktopWidget()
right = desktop_widget.availableGeometry().width()
self.setGeometry(right - 300, 0, 300, 150)
self.setWindowTitle('Rotate view')
self.show()
def init_rotate(self):
self.internal = False
self.current = 0
self.cam = gui.activeDocument().ActiveView.getCameraNode()
self.centre = coin.SbVec3f(find_centre())
self.view = self.cam.orientation.getValue()
self.pos = self.cam.position.getValue()
# Store a copy of the original view to be restored in the case of user
# selecting Reset or Cancel.
self.original_view = coin.SbRotation(self.view.getValue())
self.original_pos = coin.SbVec3f(self.pos.getValue())
self.config_direction(0)
def reset(self):
# Reset the view to the original one.
self.cam.orientation = self.original_view
self.cam.position = self.original_pos
self.internal = True
for sld in self.sliders:
sld.setValue(0)
self.internal = False
for tbox in self.line_edits:
tbox.setText("0")
self.config_direction(0)
def cancel(self):
self.reset()
self.close()
def config_direction(self, i):
# Evaluate the vectors corresponding to the three directions for the
# current view, and assign the i-th one to self.direction.
self.view = self.cam.orientation.getValue()
self.view = coin.SbRotation(self.view.getValue())
self.pos = self.cam.position.getValue()
self.pos = coin.SbVec3f(self.pos.getValue())
up = coin.SbVec3f(0,1,0)
self.up = self.view.multVec(up)
out = coin.SbVec3f(0,0,1)
self.out = self.view.multVec(out)
u = self.up.getValue()
o = self.out.getValue()
r = (u[1]*o[2]-u[2]*o[1], u[2]*o[0]-u[0]*o[2], u[0]*o[1]-u[1]*o[0])
self.right = coin.SbVec3f(r)
self.direction = [self.right, self.up, self.out][i]
def check(self, i):
# Check if the direction of rotation has changed, if so then set
# previous slider & textbox to zero, and setup the new direction.
if i != self.current:
self.internal = True
self.sliders[self.current].setValue(0)
self.line_edits[self.current].setText("0")
self.internal = False
self.current = i
self.config_direction(i)
def rotate(self, value):
# Carry out the desired rotation about self.direction.
val = value*pi/180.0
rot = coin.SbRotation(self.direction, -val)
nrot = self.view*rot
prot = rot.multVec(self.pos - self.centre) + self.centre
self.cam.orientation = nrot
self.cam.position = prot
def valueChange(self, value):
# Respond to the change in value of a slider, update the corresponding
# text box, check for a direction change then rotate
# if the value was changed internally, ignore event.
if self.internal:
return
sender = self.sender()
for i in range(3):
if sender == self.sliders[i]:
break
self.line_edits[i].setText(str(value))
self.check(i)
self.rotate(value)
def valueEntered(self):
# Respond to a value being entered in a text box, updating the
# corresponding slider, check for direction change then rotate.
sender = self.sender()
for i in range(3):
if sender == self.line_edits[i]:
break
value = int(self.line_edits[i].text())
self.internal = True
self.sliders[i].setValue(value)
self.internal = False
self.check(i)
self.rotate(value)
if __name__ == '__main__':
# We need to set a variable, otherwise, the dialog doesn't appear.
rotate = RotateGui()