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