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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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32
pyqtgraph/opengl/GLViewWidget.py
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@ -309,37 +309,51 @@ class GLViewWidget(QtOpenGL.QGLWidget):
dist = (pos-cam).length() dist = (pos-cam).length()
xDist = dist * 2. * np.tan(0.5 * self.opts['fov'] * np.pi / 180.) xDist = dist * 2. * np.tan(0.5 * self.opts['fov'] * np.pi / 180.)
return xDist / self.width() return xDist / self.width()
def mousePressEvent(self, ev): def mousePressEvent(self, ev):
self.mousePos = ev.pos() self.mousePos = ev.pos()
def mouseMoveEvent(self, ev): def mouseMoveEvent(self, ev):
diff = ev.pos() - self.mousePos diff = ev.pos() - self.mousePos
self.mousePos = ev.pos() self.mousePos = ev.pos()
if ev.buttons() == QtCore.Qt.LeftButton: if ev.buttons() == QtCore.Qt.LeftButton:
self.orbit(-diff.x(), diff.y()) if (ev.modifiers() & QtCore.Qt.ControlModifier):
#print self.opts['azimuth'], self.opts['elevation'] # 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: elif ev.buttons() == QtCore.Qt.MidButton:
if (ev.modifiers() & QtCore.Qt.ControlModifier): if (ev.modifiers() & QtCore.Qt.ControlModifier):
self.pan(diff.x(), 0, diff.y(), relative=True) self.pan(diff.x(), 0, diff.y(), relative=True)
else: else:
self.pan(diff.x(), diff.y(), 0, relative=True) self.pan(diff.x(), diff.y(), 0, relative=True)
def mouseReleaseEvent(self, ev): def mouseReleaseEvent(self, ev):
pass pass
# Example item selection code: # Example item selection code:
#region = (ev.pos().x()-5, ev.pos().y()-5, 10, 10) #region = (ev.pos().x()-5, ev.pos().y()-5, 10, 10)
#print(self.itemsAt(region)) #print(self.itemsAt(region))
## debugging code: draw the picking region ## debugging code: draw the picking region
#glViewport(*self.getViewport()) #glViewport(*self.getViewport())
#glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT ) #glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT )
#region = (region[0], self.height()-(region[1]+region[3]), region[2], region[3]) #region = (region[0], self.height()-(region[1]+region[3]), region[2], region[3])
#self.paintGL(region=region) #self.paintGL(region=region)
#self.swapBuffers() #self.swapBuffers()
def wheelEvent(self, ev): def wheelEvent(self, ev):
delta = 0 delta = 0
if not USE_PYQT5: if not USE_PYQT5: