def test_rotation_angle():
# Make sure the rotation angle calculation is correct
canvas = scene.SceneCanvas(keys=None, size=(800, 600), show=True)
view = canvas.central_widget.add_view()
view.camera = scene.cameras.TurntableCamera(parent=view.scene,
fov=0.,
distance=4.0,
elevation=0,
azimuth=0,
roll=0.)
axis1 = visuals.Axis(pos=[[-1.0, 0], [1.0, 0]], parent=view.scene)
assert_allclose(axis1._rotation_angle, 0)
axis2 = visuals.Axis(pos=[[-3**0.5 / 2., -0.5], [3**0.5 / 2., 0.5]],
parent=view.scene)
assert_allclose(axis2._rotation_angle, 0.)
view.camera.elevation = 90.
assert_allclose(axis1._rotation_angle, 0)
assert_allclose(axis2._rotation_angle, -30)
view.camera.elevation = 45.
assert_allclose(axis1._rotation_angle, 0)
assert_allclose(axis2._rotation_angle, -22.207653)
view.camera.fov = 20.
assert_allclose(axis1._rotation_angle, 0)
# OSX Travis has some small differences...sometimes
assert_allclose(axis2._rotation_angle, -17.056795, rtol=0.05)
def test_text_position():
# Test the labels text and position of the axis depending on its domain
canvas = scene.SceneCanvas(keys=None, size=(800, 600), show=True)
view = canvas.central_widget.add_view()
view.camera = scene.cameras.PanZoomCamera(parent=view.scene)
# tick length and label margin to 0 for nice values
axis1 = visuals.Axis(pos=[[-1.0, 0], [1.0, 0]],
domain=(0., 1.25),
major_tick_length=0,
tick_label_margin=0,
parent=view.scene)
canvas.draw_visual(axis1)
assert_allclose(axis1._text.pos[:, 0], (-1, -0.2, 0.6))
assert_array_equal(axis1._text.text, ('0', '0.5', '1'))
# Flip the axis domain
axis1.domain = (1.25, 0.)
canvas.draw_visual(axis1)
# Text should be unchanged and positions mirrored
assert_allclose(axis1._text.pos[:, 0], (1, 0.2, -0.6))
assert_array_equal(axis1._text.text, ('0', '0.5', '1'))
def test_tick_position():
# Test the position of the ticks depending on the axis domain
canvas = scene.SceneCanvas(keys=None, size=(800, 600), show=True)
view = canvas.central_widget.add_view()
view.camera = scene.cameras.PanZoomCamera(parent=view.scene)
axis1 = visuals.Axis(pos=[[-1.0, 0], [1.0, 0]],
domain=(0., 1.25),
parent=view.scene)
canvas.draw_visual(axis1)
# Get a nice array of x ticks positions
x_ticks_positions = axis1._ticks.pos[::2, ::2].flatten()
# Compare major ticks first
assert_allclose(x_ticks_positions[:3], (-1, -0.2, 0.6))
# Then minor ticks
assert_allclose(
x_ticks_positions[3:],
(-0.84, -0.68, -0.52, -0.36, -0.04, 0.12, 0.28, 0.44, 0.76, 0.92))
# Flip the axis domain
axis1.domain = (1.25, 0.)
canvas.draw_visual(axis1)
x_ticks_positions = axis1._ticks.pos[::2, ::2].flatten()
# Positions should be mirrored
assert_allclose(x_ticks_positions[:3], (1, 0.2, -0.6))
assert_allclose(
x_ticks_positions[3:],
(0.84, 0.68, 0.52, 0.36, 0.04, -0.12, -0.28, -0.44, -0.76, -0.92))
def init_canvas(self):
if self.verbose == 1:
print('init_canvas')
app.use_app('ipynb_webgl')
ca = vispy.scene.SceneCanvas(keys='interactive', show=True,size=(self.canvas_width,self.canvas_height),bgcolor=[1,1,1])
ca.show()
self.canvas = ca
view = ca.central_widget.add_view()
self.text = visuals.Text(anchor_x='right')
view.add(self.text)
self.label_texts = visuals.Text(anchor_x='right')
view.add(self.label_texts)
self.camera = CustomPanZoomCamera([self.text,self.label_texts])
view.camera = self.camera
axis = visuals.Axis(parent=view.scene)
self.view = view
self.line = visuals.Line()
self.line.set_data(pos=np.array([[0,0,0]]),color=np.array([[0,0,0,0]]))
self.line.order = 1
self.view.add(self.line)
self.mesh = visuals.Mesh()
self.mesh.order = 0
self.view.add(self.mesh)
app.run()
def test_axis_zero_domain():
# Regression test for a bug that caused an overflow error when the domain
# min was same as max
with TestingCanvas() as c:
axis = visuals.Axis(pos=[[-1.0, 0], [1.0, 0]],
domain=(0.5, 0.5),
parent=c.scene)
c.draw_visual(axis)
def test_axis():
with TestingCanvas() as c:
axis = visuals.Axis(pos=[[-1.0, 0], [1.0, 0]], parent=c.scene)
c.draw_visual(axis)
