def setup_viewing_volume(self):
aspect = self.w / max(1, self.h)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
near, far = self.get_clipping_distances()
if self.orthographic:
s = self.minimum_covering_sphere
# c = s.center()
c = self.rotation_center
r = s.radius()
rf = self.buffer_factor * r
left = c[0] - rf
right = c[0] + rf
bottom = c[1] - rf
top = c[1] + rf
if aspect < 1:
bottom /= aspect
top /= aspect
else:
left *= aspect
right *= aspect
gl.glOrtho(left, right, bottom, top, near, far)
else:
glu.gluPerspective(self.field_of_view_y, aspect, near, far)
self.set_lights()
self.setup_fog()
def set_lights(self):
if self.flag_use_lights:
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glLoadIdentity()
gl.glEnable(gl.GL_LIGHTING)
gl.glEnable(gl.GL_LIGHT0)
gl.glLightfv(gl.GL_LIGHT0, gl.GL_POSITION, self.light0_position)
gl.glPopMatrix()
def fit_into_viewport(self):
dx, dy, dz = self.compute_home_translation()
move_factor = self.translation_move_factor((dx, dy, dz))
mvm = gltbx.util.get_gl_modelview_matrix()
for f in animation_stepper(time_move=self.animation_time,
move_factor=move_factor):
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glLoadIdentity()
gl.glTranslated(f * dx, f * dy, f * dz)
gl.glMultMatrixd(mvm)
self.OnRedraw()
def move_to_center_of_viewport(self, obj_coor):
dx, dy = [-x for x in gltbx.util.object_as_eye_coordinates(obj_coor)[:2]]
move_factor = self.translation_move_factor((dx, dy, 0))
mvm = gltbx.util.get_gl_modelview_matrix()
for f in animation_stepper(
time_move=self.animation_time, move_factor=move_factor
):
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glLoadIdentity()
gl.glTranslated(f * dx, f * dy, 0)
gl.glMultMatrixd(mvm)
self.OnRedraw()
def initialize_modelview(self, eye_vector=None, angle=None):
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glLoadIdentity()
self.setup_lighting()
glu.gluLookAt(0, 0, 0, 0, 0, -1, 0, 1, 0)
translation = self.compute_home_translation()
gl.glTranslated(*translation)
rc = self.minimum_covering_sphere.center()
self.rotation_center = rc
if eye_vector is None:
eye_vector = (1, 1, 1)
if angle is None:
angle = -120
gltbx.util.rotate_object_about_eye_vector(
xcenter=rc[0],
ycenter=rc[1],
zcenter=rc[2],
xvector=eye_vector[0],
yvector=eye_vector[1],
zvector=eye_vector[2],
angle=angle,
)
