def test_opengl_state_simple():
for gl_state in [
window.gl_reset_blend, window.gl_enable_depth,
window.gl_disable_depth, window.gl_enable_blend,
window.gl_disable_blend, window.gl_set_additive_blending,
window.gl_set_normal_blending,
window.gl_set_multiplicative_blending,
window.gl_set_subtractive_blending,
window.gl_set_additive_blending_white_background
]:
scene = window.Scene()
centers = np.array([[0, 0, 0], [-.1, 0, 0], [.1, 0, 0]])
colors = np.array([[1, 0, 0], [0, 1, 0], [0, 0, 1]])
actors = actor.markers(
centers,
marker='s',
colors=colors,
marker_opacity=.5,
scales=.2,
)
showm = window.ShowManager(scene,
size=(900, 768),
reset_camera=False,
order_transparent=False)
scene.add(actors)
# single effect
shaders.shader_apply_effects(showm.window, actors, effects=gl_state)
showm.render()
def timer_callback(obj, event):
cnt = next(counter)
showm.render()
# we will rotate the visualization just to help you to see
# the results of each specifc opengl-state
showm.scene.azimuth(1)
if cnt == 400:
remove_observer_from_actor(actor_no_depth_test, id_observer)
shader_apply_effects(showm.window,
actor_no_depth_test,
effects=window.gl_set_additive_blending)
if cnt == 1000:
showm.exit()
def test_opengl_state_add_remove_and_check():
scene = window.Scene()
centers = np.array([
[0, 0, 0],
[-.1, 0, 0],
[.1, 0, 0]
])
colors = np.array([
[1, 0, 0],
[0, 1, 0],
[0, 0, 1]
])
actor_no_depth_test = actor.markers(
centers,
marker='s',
colors=colors,
marker_opacity=.5,
scales=.2,
)
showm = window.ShowManager(
scene,
size=(900, 768), reset_camera=False,
order_transparent=False)
scene.add(actor_no_depth_test)
showm.render()
state = window.gl_get_current_state(showm.window.GetState())
before_depth_test = state['GL_DEPTH_TEST']
npt.assert_equal(before_depth_test, True)
# TODO: we are getting bad request for enum status
# it seems we are not provide the correct values
# vtkOpenGLState.cxx:1299 WARN| Bad request for enum status
id_observer = shaders.shader_apply_effects(
showm.window, actor_no_depth_test,
effects=[
window.gl_reset_blend, window.gl_disable_blend,
window.gl_disable_depth])
showm.render()
state = window.gl_get_current_state(showm.window.GetState())
# print('type', type(showm.window.GetState()))
after_depth_test = state['GL_DEPTH_TEST']
npt.assert_equal(after_depth_test, False)
# removes the no_depth_test effect
remove_observer_from_actor(actor_no_depth_test, id_observer)
showm.render()
state = window.gl_get_current_state(showm.window.GetState())
after_remove_depth_test_observer = state['GL_DEPTH_TEST']
npt.assert_equal(after_remove_depth_test_observer, True)
scene.add(actor_no_depth_test)
scene.add(actor_normal_blending)
scene.add(actor_add_blending)
scene.add(actor_sub_blending)
scene.add(actor_mul_blending)
###############################################################################
# Now, we will enter in the topic of this example. First, we need to create
# (or use one of the pre-built gl_function of FURY) to
# change the OpenGL state of a given fury window instance (showm.window).
#
# Here we're using the pre-build FURY window functions which has already a
# set of specific behaviors to be applied in the OpenGL context
shader_apply_effects(showm.window,
actor_normal_blending,
effects=window.gl_set_normal_blending)
# ###############################################################################
# It's also possible use a list of effects. The final opengl state it'll
# be the composition of each effect that each function has in the opengl state
id_observer = shader_apply_effects(showm.window,
actor_no_depth_test,
effects=[
window.gl_reset_blend,
window.gl_disable_blend,
window.gl_disable_depth
])
shader_apply_effects(showm.window,