def test_euler_equivalence(self):
eulers = euler.create_from_x_rotation(np.pi / 2.)
m = Matrix33.from_x_rotation(np.pi / 2.)
q = Quaternion.from_x_rotation(np.pi / 2.)
qm = Matrix33.from_quaternion(q)
em = Matrix33.from_eulers(eulers)
self.assertTrue(np.allclose(qm, m))
self.assertTrue(np.allclose(qm, em))
self.assertTrue(np.allclose(m, em))
def test_euler_equivalence(self):
eulers = euler.create_from_x_rotation(np.pi / 2.)
m = Matrix33.from_x_rotation(np.pi / 2.)
q = Quaternion.from_x_rotation(np.pi / 2.)
qm = Matrix33.from_quaternion(q)
em = Matrix33.from_eulers(eulers)
self.assertTrue(np.allclose(qm, m))
self.assertTrue(np.allclose(qm, em))
self.assertTrue(np.allclose(m, em))
def drag_camera(self):
if not imgui.is_any_item_active():
mx, my = imgui.get_mouse_drag_delta()
else:
mx, my = 0, 0
# if we just released the mouse, save the new camera position
if self.camera['mouse_down'] and not self.io.mouse_down[0]:
self.camera['saved_center'] = self.camera['center']
self.camera['mouse_down'] = self.io.mouse_down[0]
# no drag, don't do anything
if mx == 0 and my == 0:
return False
# calculate the camera position according to the current drag
# this is a rotation relative to the saved position
self.camera['center'] = Matrix33.from_y_rotation(self.camera['rot_speed'] * mx / self.width) \
* Matrix33.from_x_rotation(self.camera['rot_speed'] * my / self.height) \
* self.camera['saved_center']
self.update_camera()
# camera has changed
return True
