def __init__(self, model, position, orientation, scale):
self.model = model
self.position = position
self.orientation = orientation
self.scale = scale
self.transform = Matrix44.translation_vec3(position) * Matrix44.scale(scale) * orientation
def __init__(self, model, position, orientation, scale):
self.model = model
self.position = position
self.orientation = orientation
self.scale = scale
self.transform = Matrix44.translation(position.x, position.y, position.z) * Matrix44.scale(scale) * orientation
self.bounds_radius = model.bounds_radius * scale # the bounds radius should also change
self.bounds_center = self.transform.transform_vec3(model.bounds_center)
def handle_arcball():
global last_click_pos
global model_mod
global model
global view_mod
global view
# LMB = rotate arcball
if (pygame.mouse.get_pressed()[0]):
if (last_click_pos[0] == (-1, -1)):
last_click_pos[0] = pygame.mouse.get_pos()
v_new = screen_to_arcball(pygame.mouse.get_pos())
v_old = screen_to_arcball(last_click_pos[0])
angle = math.acos(min(1.0, v_new.dot(v_old)))
axis = (v_new.cross(v_old)).normalize()
model_mod = Matrix44.rotation_about_axis(axis, angle)
else:
if (last_click_pos[0] != (-1, -1)):
last_click_pos[0] = (-1, -1)
model = model_mod * model
model_mod = Matrix44.identity()
# MMB = translate arcball
if (pygame.mouse.get_pressed()[1]):
if (last_click_pos[1] == (-1, -1)):
last_click_pos[1] = pygame.mouse.get_pos()
dx = (pygame.mouse.get_pos()[0] - last_click_pos[1][0]) / float(res[0])
dy = (pygame.mouse.get_pos()[1] - last_click_pos[1][1]) / float(res[1])
view_mod = Matrix44.translation(-dx, -dy, 0)
else:
if (last_click_pos[1] != (-1, -1)):
last_click_pos[1] = (-1, -1)
view = view_mod * view
view_mod = Matrix44.identity()
# RMB = scale arcball (based on RMB delta y)
if (pygame.mouse.get_pressed()[2]):
if (last_click_pos[2] == (-1, -1)):
last_click_pos[2] = pygame.mouse.get_pos()
dy = (pygame.mouse.get_pos()[1] - last_click_pos[2][1]) / float(res[1])
model_mod = Matrix44.scale(max(-dy + 1.0, 0.01))
else:
if (last_click_pos[2] != (-1, -1)):
last_click_pos[2] = (-1, -1)
model = model_mod * model
model_mod = Matrix44.identity()