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import pyglet.gl as pgl
from sympy.plotting.pygletplot.plot_rotation import get_spherical_rotatation
from sympy.plotting.pygletplot.util import get_model_matrix, model_to_screen, \
screen_to_model, vec_subs
class PlotCamera:
min_dist = 0.05
max_dist = 500.0
min_ortho_dist = 100.0
max_ortho_dist = 10000.0
_default_dist = 6.0
_default_ortho_dist = 600.0
rot_presets = {
'xy': (0, 0, 0),
'xz': (-90, 0, 0),
'yz': (0, 90, 0),
'perspective': (-45, 0, -45)
}
def __init__(self, window, ortho=False):
self.window = window
self.axes = self.window.plot.axes
self.ortho = ortho
self.reset()
def init_rot_matrix(self):
pgl.glPushMatrix()
pgl.glLoadIdentity()
self._rot = get_model_matrix()
pgl.glPopMatrix()
def set_rot_preset(self, preset_name):
self.init_rot_matrix()
if preset_name not in self.rot_presets:
raise ValueError(
"%s is not a valid rotation preset." % preset_name)
r = self.rot_presets[preset_name]
self.euler_rotate(r[0], 1, 0, 0)
self.euler_rotate(r[1], 0, 1, 0)
self.euler_rotate(r[2], 0, 0, 1)
def reset(self):
self._dist = 0.0
self._x, self._y = 0.0, 0.0
self._rot = None
if self.ortho:
self._dist = self._default_ortho_dist
else:
self._dist = self._default_dist
self.init_rot_matrix()
def mult_rot_matrix(self, rot):
pgl.glPushMatrix()
pgl.glLoadMatrixf(rot)
pgl.glMultMatrixf(self._rot)
self._rot = get_model_matrix()
pgl.glPopMatrix()
def setup_projection(self):
pgl.glMatrixMode(pgl.GL_PROJECTION)
pgl.glLoadIdentity()
if self.ortho:
# yep, this is pseudo ortho (don't tell anyone)
pgl.gluPerspective(
0.3, float(self.window.width)/float(self.window.height),
self.min_ortho_dist - 0.01, self.max_ortho_dist + 0.01)
else:
pgl.gluPerspective(
30.0, float(self.window.width)/float(self.window.height),
self.min_dist - 0.01, self.max_dist + 0.01)
pgl.glMatrixMode(pgl.GL_MODELVIEW)
def _get_scale(self):
return 1.0, 1.0, 1.0
def apply_transformation(self):
pgl.glLoadIdentity()
pgl.glTranslatef(self._x, self._y, -self._dist)
if self._rot is not None:
pgl.glMultMatrixf(self._rot)
pgl.glScalef(*self._get_scale())
def spherical_rotate(self, p1, p2, sensitivity=1.0):
mat = get_spherical_rotatation(p1, p2, self.window.width,
self.window.height, sensitivity)
if mat is not None:
self.mult_rot_matrix(mat)
def euler_rotate(self, angle, x, y, z):
pgl.glPushMatrix()
pgl.glLoadMatrixf(self._rot)
pgl.glRotatef(angle, x, y, z)
self._rot = get_model_matrix()
pgl.glPopMatrix()
def zoom_relative(self, clicks, sensitivity):
if self.ortho:
dist_d = clicks * sensitivity * 50.0
min_dist = self.min_ortho_dist
max_dist = self.max_ortho_dist
else:
dist_d = clicks * sensitivity
min_dist = self.min_dist
max_dist = self.max_dist
new_dist = (self._dist - dist_d)
if (clicks < 0 and new_dist < max_dist) or new_dist > min_dist:
self._dist = new_dist
def mouse_translate(self, x, y, dx, dy):
pgl.glPushMatrix()
pgl.glLoadIdentity()
pgl.glTranslatef(0, 0, -self._dist)
z = model_to_screen(0, 0, 0)[2]
d = vec_subs(screen_to_model(x, y, z), screen_to_model(x - dx, y - dy, z))
pgl.glPopMatrix()
self._x += d[0]
self._y += d[1]
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