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Allow for panning in the plane of the camera

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This commit is contained in:
Doug Johnston 2018-04-25 20:06:40 -07:00
parent 748ca554e4
commit 972f6205b5
1 changed files with 23 additions and 9 deletions
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18
pyqtgraph/opengl/GLViewWidget.py
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@ -318,8 +318,22 @@ class GLViewWidget(QtOpenGL.QGLWidget):
self.mousePos = ev.pos()
if ev.buttons() == QtCore.Qt.LeftButton:
self.orbit(-diff.x(), diff.y())
#print self.opts['azimuth'], self.opts['elevation']
if (ev.modifiers() & QtCore.Qt.ControlModifier):
# pan in plane of camera
elev = np.radians(self.opts['elevation'])
azim = np.radians(self.opts['azimuth'])
fov = np.radians(self.opts['fov'])
dist = (self.opts['center'] - self.cameraPosition()).length()
fov_factor = np.tan(fov / 2) * 2
scale_factor = dist * fov_factor / self.width()
dx = diff.x()
dy = diff.y()
z = scale_factor * np.cos(elev) * dy
x = scale_factor * (np.sin(azim) * dx - np.sin(elev) * np.cos(azim) * dy)
y = scale_factor * (np.cos(azim) * dx + np.sin(elev) * np.sin(azim) * dy)
self.pan(x, -y, z, relative=False)
else:
self.orbit(-diff.x(), diff.y())
elif ev.buttons() == QtCore.Qt.MidButton:
if (ev.modifiers() & QtCore.Qt.ControlModifier):
self.pan(diff.x(), 0, diff.y(), relative=True)