def test_show_entity():
"""Test showing an entity"""
# Create a figure
app = Application()
fig = scene.CanvasWithScene(app=app)
app.create()
fig.size = 1, 1
fig.show()
camcontainer = scene.PixelCamera(fig.viewbox)
camera = scene.ThreeDCamera(camcontainer)
camera._fov = 90
fig.viewbox.camera = camera
pointscontainer = scene.Entity(fig.viewbox)
scene.PointsEntity(pointscontainer, 1000)
app.process_events()
app.process_events() # for good measure
# Now do first-person
camcontainer = scene.PixelCamera(fig.viewbox)
camera = scene.FirstPersonCamera(camcontainer)
camera.update_angles()
fig.viewbox.camera = camera
pointscontainer = scene.Entity(fig.viewbox)
scene.PointsEntity(pointscontainer, 1000)
app.process_events()
app.process_events() # for good measure
# Now do 2D
camcontainer = scene.PixelCamera(fig.viewbox)
camera = scene.TwoDCamera(camcontainer)
camera.xlim = -100, 500
camera.ylim = -100, 500
fig.viewbox.camera = camera
pointscontainer = scene.Entity(fig.viewbox)
scene.PointsEntity(pointscontainer, 1000)
transforms.translate(camcontainer.transform, 50, 50)
transforms.rotate(camcontainer.transform, 10, 0, 0, 1)
app.process_events()
app.process_events() # for good measure
fig.close()
app.quit()
def _test_application(backend):
"""Test application running"""
app = Application()
assert_raises(ValueError, app.use, 'foo')
app.use(backend)
wrong = 'Glut' if app.backend_name != 'Glut' else 'Pyglet'
assert_raises(RuntimeError, app.use, wrong)
app.process_events()
if backend is not None:
# "in" b/c "qt" in "PySide (qt)"
assert_true(backend in app.backend_name)
print(app) # test __repr__
# Canvas
pos = [0, 0, 1, 1]
# Use "with" statement so failures don't leave open window
# (and test context manager behavior)
with Canvas(title='me', app=app, show=True, position=pos) as canvas:
assert_true(canvas.app is app)
assert_true(canvas.native)
print(canvas.size >= (1, 1))
canvas.resize(90, 90)
canvas.move(1, 1)
assert_equal(canvas.title, 'me')
canvas.title = 'you'
canvas.position = (0, 0)
canvas.size = (100, 100)
canvas.connect(on_mouse_move)
assert_raises(ValueError, canvas.connect, _on_mouse_move)
canvas.show()
assert_raises(ValueError, canvas.connect, on_nonexist)
# screenshots
ss = _screenshot()
assert_array_equal(ss.shape[2], 3) # XXX other dimensions not correct?
# XXX it would be good to do real checks, but sometimes the
# repositionings don't "take" (i.e., lead to random errors)
assert_equal(len(canvas._backend._vispy_get_geometry()), 4)
assert_equal(len(canvas.size), 2)
assert_equal(len(canvas.position), 2)
# GLOO: should have an OpenGL context already, so these should work
vert = VertexShader("void main (void) {gl_Position = pos;}")
frag = FragmentShader("void main (void) {gl_FragColor = pos;}")
program = Program(vert, frag)
assert_raises(ShaderError, program.activate)
vert = VertexShader("uniform vec4 pos;"
"void main (void) {gl_Position = pos;}")
frag = FragmentShader("uniform vec4 pos;"
"void main (void) {gl_FragColor = pos;}")
program = Program(vert, frag)
uniform = program.uniforms[0]
uniform.set_data([1, 2, 3, 4])
program.activate() # should print
uniform.upload(program)
program.detach(vert, frag)
assert_raises(ShaderError, program.detach, vert)
assert_raises(ShaderError, program.detach, frag)
vert = VertexShader("attribute vec4 pos;"
"void main (void) {gl_Position = pos;}")
frag = FragmentShader("void main (void) {}")
program = Program(vert, frag)
attribute = program.attributes[0]
attribute.set_data([1, 2, 3, 4])
program.activate()
attribute.upload(program)
# cannot get element count
assert_raises(ProgramError, program.draw, 'POINTS')
# use a real program
vert = ("uniform mat4 u_model;"
"attribute vec2 a_position; attribute vec4 a_color;"
"varying vec4 v_color;"
"void main (void) {v_color = a_color;"
"gl_Position = u_model * vec4(a_position, 0.0, 1.0);"
"v_color = a_color;}")
frag = "void main() {gl_FragColor = vec4(0, 0, 0, 1);}"
n, p = 250, 50
T = np.random.uniform(0, 2 * np.pi, n)
position = np.zeros((n, 2), dtype=np.float32)
position[:, 0] = np.cos(T)
position[:, 1] = np.sin(T)
color = np.ones((n, 4), dtype=np.float32) * (1, 1, 1, 1)
data = np.zeros(n * p, [('a_position', np.float32, 2),
('a_color', np.float32, 4)])
data['a_position'] = np.repeat(position, p, axis=0)
data['a_color'] = np.repeat(color, p, axis=0)
program = Program(vert, frag)
program.set_vars(VertexBuffer(data))
program['u_model'] = np.eye(4, dtype=np.float32)
program.draw('POINTS') # different codepath if no call to activate()
subset = ElementBuffer(np.arange(10, dtype=np.uint32))
program.draw('POINTS', subset=subset)
# bad programs
frag_bad = ("varying vec4 v_colors") # no semicolon
program = Program(vert, frag_bad)
assert_raises(ShaderError, program.activate)
frag_bad = None # no fragment code. no main is not always enough
program = Program(vert, frag_bad)
assert_raises(ProgramError, program.activate)
# Timer
timer = Timer(interval=0.001, connect=on_mouse_move, iterations=2,
start=True, app=app)
timer.start()
timer.interval = 0.002
assert_equal(timer.interval, 0.002)
assert_true(timer.running)
timer.stop()
assert_true(not timer.running)
assert_true(timer.native)
timer.disconnect()
# test that callbacks take reasonable inputs
_test_callbacks(canvas)
# cleanup
canvas.swap_buffers()
canvas.update()
# put this in even though __exit__ will call it to make sure we don't
# have problems calling it multiple times
canvas.close()
app.quit()
app.quit() # make sure it doesn't break if a user does something silly
