def __init__(self):
configuration = self.Configuration()
configuration.title = "Magnum Python Primitives + SceneGraph Example"
platform.Application.__init__(self, configuration)
gl.Renderer.enable(gl.Renderer.Feature.DEPTH_TEST)
gl.Renderer.enable(gl.Renderer.Feature.FACE_CULLING)
# Scene and drawables
self._scene = Scene3D()
self._drawables = scenegraph.DrawableGroup3D()
# Camera setup
camera_object = Object3D(self._scene)
camera_object.translate(Vector3.z_axis(10.0))
self._camera = scenegraph.Camera3D(camera_object)
self._camera.projection_matrix = Matrix4.perspective_projection(
fov=Deg(35.0), aspect_ratio=1.33333, near=0.01, far=100.0)
# Cube object and drawable
self._cube = Object3D(self._scene)
self._cube.rotate_y(Deg(40.0))
self._cube.rotate_x(Deg(30.0))
self._cube_drawable = CubeDrawable(
self._cube, self._drawables,
meshtools.compile(primitives.cube_solid()), shaders.Phong(),
Color3.from_hsv(Deg(35.0), 1.0, 1.0))
def test_camera(self):
object = Object3D()
object.translate(Vector3.z_axis(5.0))
object_refcount = sys.getrefcount(object)
a = scenegraph.Camera3D(object)
a.viewport = (400, 300)
a.projection_matrix = Matrix4.perspective_projection(fov=Deg(45.0),
near=0.01,
far=100.0,
aspect_ratio=1.0)
a.aspect_ratio_policy = scenegraph.AspectRatioPolicy.EXTEND
a_refcount = sys.getrefcount(a)
self.assertEqual(a.viewport, Vector2i(400, 300))
self.assertEqual(
a.projection_matrix,
Matrix4.perspective_projection(fov=Deg(57.82240),
near=0.01,
far=100.0,
aspect_ratio=1.33333333))
self.assertEqual(a.camera_matrix,
Matrix4.translation(-Vector3.z_axis(5.0)))
self.assertEqual(a.aspect_ratio_policy,
scenegraph.AspectRatioPolicy.EXTEND)
self.assertIs(a.object, object)
# Camera should be referenced by the object, but not cyclically
self.assertEqual(sys.getrefcount(object), object_refcount)
self.assertEqual(sys.getrefcount(a), object_refcount + 1)
# Delete the object. The camera should be still alive, but disconnected
# from the object (and thus useless).
del object
self.assertIsNone(a.object)
self.assertEqual(sys.getrefcount(a), a_refcount - 1)
def test_camera_draw(self):
scene = Scene3D()
drawables = scenegraph.DrawableGroup3D()
camera_object = Object3D(scene)
camera_object.translate((0.0, 1.0, 5.0))
camera = scenegraph.Camera3D(camera_object)
rendered = None, None
deleted = "no :)"
class MyDrawable(scenegraph.Drawable3D):
def draw(self, transformation_matrix: Matrix4,
camera: scenegraph.Camera3D):
nonlocal rendered
rendered = (transformation_matrix, camera)
def __del__(self):
nonlocal deleted
deleted = "yes :("
class MySilentDrawable(scenegraph.Drawable3D):
def draw(self, transformation_matrix: Matrix4,
camera: scenegraph.Camera3D):
pass
object = Object3D(scene)
object.translate(Vector3.x_axis(5.0))
a = MyDrawable(object, drawables)
b = MySilentDrawable(object, drawables)
# The drawable group should have these listed
self.assertEqual([i for i in drawables], [a, b])
# Deleting the object, the camera holder and drawable does nothing
del camera_object, object, a, b
camera.draw(drawables)
self.assertEqual(
rendered[0],
Matrix4.translation(Vector3.x_axis(5.0)) @ Matrix4.translation(
(0.0, -1.0, -5.0)))
self.assertIs(rendered[1], camera)
# Deleting the scene will delete A and the drawable as well
del scene
self.assertEqual(deleted, "yes :(")
self.assertIsNone(camera.object)
self.assertIs(len(drawables), 0)
def __init__(self):
configuration = self.Configuration()
configuration.title = "Magnum Python Viewer Example"
Application.__init__(self, configuration)
gl.Renderer.enable(gl.Renderer.Feature.DEPTH_TEST)
gl.Renderer.enable(gl.Renderer.Feature.FACE_CULLING)
# Scene and drawables
self._scene = Scene3D()
self._drawables = scenegraph.DrawableGroup3D()
# Every scene needs a camera
camera_object = Object3D(parent=self._scene)
camera_object.translate(Vector3.z_axis(5.0))
self._camera = scenegraph.Camera3D(camera_object)
self._camera.aspect_ratio_policy = scenegraph.AspectRatioPolicy.EXTEND
self._camera.projection_matrix = Matrix4.perspective_projection(
fov=Deg(35.0), aspect_ratio=1.0, near=0.01, far=100.0)
self._camera.viewport = self.framebuffer_size
# Base object, parent of all (for easy manipulation)
self._manipulator = Object3D(parent=self._scene)
# Setup renderer and shader defaults
gl.Renderer.enable(gl.Renderer.Feature.DEPTH_TEST)
gl.Renderer.enable(gl.Renderer.Feature.FACE_CULLING)
colored_shader = shaders.Phong()
colored_shader.ambient_color = Color3(0.06667)
colored_shader.shininess = 80.0
# Import Suzanne head and eyes (yes, sorry, it's all hardcoded here)
importer = trade.ImporterManager().load_and_instantiate(
'TinyGltfImporter')
importer.open_file(
os.path.join(os.path.dirname(__file__), '../viewer/scene.glb'))
suzanne_object = Object3D(parent=self._manipulator)
suzanne_mesh = meshtools.compile(
importer.mesh(importer.mesh_for_name('Suzanne')))
suzanne_eyes_mesh = meshtools.compile(
importer.mesh(importer.mesh_for_name('Eyes')))
self._suzanne = ColoredDrawable(suzanne_object, self._drawables,
suzanne_mesh, colored_shader,
Color3(0.15, 0.49, 1.0))
self._suzanne_eyes = ColoredDrawable(suzanne_object, self._drawables,
suzanne_eyes_mesh, colored_shader,
Color3(0.95))
self._previous_mouse_position = Vector2i()
