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import pyglet.gl as pgl
from sympy.core import S
from sympy.plotting.pygletplot.plot_mode_base import PlotModeBase
class PlotCurve(PlotModeBase):
style_override = 'wireframe'
def _on_calculate_verts(self):
self.t_interval = self.intervals[0]
self.t_set = list(self.t_interval.frange())
self.bounds = [[S.Infinity, S.NegativeInfinity, 0],
[S.Infinity, S.NegativeInfinity, 0],
[S.Infinity, S.NegativeInfinity, 0]]
evaluate = self._get_evaluator()
self._calculating_verts_pos = 0.0
self._calculating_verts_len = float(self.t_interval.v_len)
self.verts = []
b = self.bounds
for t in self.t_set:
try:
_e = evaluate(t) # calculate vertex
except (NameError, ZeroDivisionError):
_e = None
if _e is not None: # update bounding box
for axis in range(3):
b[axis][0] = min([b[axis][0], _e[axis]])
b[axis][1] = max([b[axis][1], _e[axis]])
self.verts.append(_e)
self._calculating_verts_pos += 1.0
for axis in range(3):
b[axis][2] = b[axis][1] - b[axis][0]
if b[axis][2] == 0.0:
b[axis][2] = 1.0
self.push_wireframe(self.draw_verts(False))
def _on_calculate_cverts(self):
if not self.verts or not self.color:
return
def set_work_len(n):
self._calculating_cverts_len = float(n)
def inc_work_pos():
self._calculating_cverts_pos += 1.0
set_work_len(1)
self._calculating_cverts_pos = 0
self.cverts = self.color.apply_to_curve(self.verts,
self.t_set,
set_len=set_work_len,
inc_pos=inc_work_pos)
self.push_wireframe(self.draw_verts(True))
def calculate_one_cvert(self, t):
vert = self.verts[t]
return self.color(vert[0], vert[1], vert[2],
self.t_set[t], None)
def draw_verts(self, use_cverts):
def f():
pgl.glBegin(pgl.GL_LINE_STRIP)
for t in range(len(self.t_set)):
p = self.verts[t]
if p is None:
pgl.glEnd()
pgl.glBegin(pgl.GL_LINE_STRIP)
continue
if use_cverts:
c = self.cverts[t]
if c is None:
c = (0, 0, 0)
pgl.glColor3f(*c)
else:
pgl.glColor3f(*self.default_wireframe_color)
pgl.glVertex3f(*p)
pgl.glEnd()
return f
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