379 lines
11 KiB
Python
379 lines
11 KiB
Python
import pyglet.gl as pgl
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from sympy.core import S
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from sympy.plotting.pygletplot.color_scheme import ColorScheme
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from sympy.plotting.pygletplot.plot_mode import PlotMode
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from sympy.utilities.iterables import is_sequence
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from time import sleep
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from threading import Thread, Event, RLock
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import warnings
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class PlotModeBase(PlotMode):
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"""
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Intended parent class for plotting
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modes. Provides base functionality
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in conjunction with its parent,
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PlotMode.
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"""
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##
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## Class-Level Attributes
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##
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"""
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The following attributes are meant
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to be set at the class level, and serve
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as parameters to the plot mode registry
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(in PlotMode). See plot_modes.py for
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concrete examples.
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"""
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"""
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i_vars
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'x' for Cartesian2D
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'xy' for Cartesian3D
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etc.
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d_vars
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'y' for Cartesian2D
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'r' for Polar
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etc.
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"""
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i_vars, d_vars = '', ''
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"""
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intervals
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Default intervals for each i_var, and in the
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same order. Specified [min, max, steps].
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No variable can be given (it is bound later).
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"""
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intervals = []
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"""
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aliases
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A list of strings which can be used to
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access this mode.
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'cartesian' for Cartesian2D and Cartesian3D
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'polar' for Polar
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'cylindrical', 'polar' for Cylindrical
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Note that _init_mode chooses the first alias
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in the list as the mode's primary_alias, which
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will be displayed to the end user in certain
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contexts.
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"""
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aliases = []
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"""
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is_default
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Whether to set this mode as the default
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for arguments passed to PlotMode() containing
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the same number of d_vars as this mode and
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at most the same number of i_vars.
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"""
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is_default = False
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"""
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All of the above attributes are defined in PlotMode.
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The following ones are specific to PlotModeBase.
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"""
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"""
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A list of the render styles. Do not modify.
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"""
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styles = {'wireframe': 1, 'solid': 2, 'both': 3}
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"""
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style_override
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Always use this style if not blank.
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"""
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style_override = ''
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"""
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default_wireframe_color
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default_solid_color
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Can be used when color is None or being calculated.
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Used by PlotCurve and PlotSurface, but not anywhere
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in PlotModeBase.
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"""
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default_wireframe_color = (0.85, 0.85, 0.85)
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default_solid_color = (0.6, 0.6, 0.9)
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default_rot_preset = 'xy'
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##
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## Instance-Level Attributes
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##
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## 'Abstract' member functions
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def _get_evaluator(self):
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if self.use_lambda_eval:
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try:
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e = self._get_lambda_evaluator()
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return e
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except Exception:
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warnings.warn("\nWarning: creating lambda evaluator failed. "
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"Falling back on SymPy subs evaluator.")
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return self._get_sympy_evaluator()
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def _get_sympy_evaluator(self):
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raise NotImplementedError()
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def _get_lambda_evaluator(self):
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raise NotImplementedError()
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def _on_calculate_verts(self):
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raise NotImplementedError()
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def _on_calculate_cverts(self):
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raise NotImplementedError()
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## Base member functions
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def __init__(self, *args, bounds_callback=None, **kwargs):
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self.verts = []
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self.cverts = []
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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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self.cbounds = [[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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self._draw_lock = RLock()
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self._calculating_verts = Event()
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self._calculating_cverts = Event()
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self._calculating_verts_pos = 0.0
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self._calculating_verts_len = 0.0
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self._calculating_cverts_pos = 0.0
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self._calculating_cverts_len = 0.0
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self._max_render_stack_size = 3
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self._draw_wireframe = [-1]
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self._draw_solid = [-1]
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self._style = None
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self._color = None
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self.predraw = []
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self.postdraw = []
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self.use_lambda_eval = self.options.pop('use_sympy_eval', None) is None
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self.style = self.options.pop('style', '')
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self.color = self.options.pop('color', 'rainbow')
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self.bounds_callback = bounds_callback
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self._on_calculate()
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def synchronized(f):
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def w(self, *args, **kwargs):
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self._draw_lock.acquire()
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try:
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r = f(self, *args, **kwargs)
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return r
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finally:
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self._draw_lock.release()
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return w
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@synchronized
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def push_wireframe(self, function):
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"""
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Push a function which performs gl commands
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used to build a display list. (The list is
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built outside of the function)
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"""
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assert callable(function)
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self._draw_wireframe.append(function)
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if len(self._draw_wireframe) > self._max_render_stack_size:
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del self._draw_wireframe[1] # leave marker element
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@synchronized
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def push_solid(self, function):
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"""
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Push a function which performs gl commands
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used to build a display list. (The list is
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built outside of the function)
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"""
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assert callable(function)
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self._draw_solid.append(function)
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if len(self._draw_solid) > self._max_render_stack_size:
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del self._draw_solid[1] # leave marker element
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def _create_display_list(self, function):
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dl = pgl.glGenLists(1)
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pgl.glNewList(dl, pgl.GL_COMPILE)
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function()
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pgl.glEndList()
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return dl
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def _render_stack_top(self, render_stack):
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top = render_stack[-1]
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if top == -1:
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return -1 # nothing to display
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elif callable(top):
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dl = self._create_display_list(top)
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render_stack[-1] = (dl, top)
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return dl # display newly added list
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elif len(top) == 2:
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if pgl.GL_TRUE == pgl.glIsList(top[0]):
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return top[0] # display stored list
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dl = self._create_display_list(top[1])
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render_stack[-1] = (dl, top[1])
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return dl # display regenerated list
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def _draw_solid_display_list(self, dl):
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pgl.glPushAttrib(pgl.GL_ENABLE_BIT | pgl.GL_POLYGON_BIT)
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pgl.glPolygonMode(pgl.GL_FRONT_AND_BACK, pgl.GL_FILL)
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pgl.glCallList(dl)
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pgl.glPopAttrib()
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def _draw_wireframe_display_list(self, dl):
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pgl.glPushAttrib(pgl.GL_ENABLE_BIT | pgl.GL_POLYGON_BIT)
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pgl.glPolygonMode(pgl.GL_FRONT_AND_BACK, pgl.GL_LINE)
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pgl.glEnable(pgl.GL_POLYGON_OFFSET_LINE)
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pgl.glPolygonOffset(-0.005, -50.0)
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pgl.glCallList(dl)
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pgl.glPopAttrib()
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@synchronized
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def draw(self):
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for f in self.predraw:
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if callable(f):
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f()
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if self.style_override:
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style = self.styles[self.style_override]
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else:
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style = self.styles[self._style]
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# Draw solid component if style includes solid
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if style & 2:
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dl = self._render_stack_top(self._draw_solid)
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if dl > 0 and pgl.GL_TRUE == pgl.glIsList(dl):
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self._draw_solid_display_list(dl)
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# Draw wireframe component if style includes wireframe
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if style & 1:
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dl = self._render_stack_top(self._draw_wireframe)
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if dl > 0 and pgl.GL_TRUE == pgl.glIsList(dl):
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self._draw_wireframe_display_list(dl)
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for f in self.postdraw:
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if callable(f):
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f()
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def _on_change_color(self, color):
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Thread(target=self._calculate_cverts).start()
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def _on_calculate(self):
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Thread(target=self._calculate_all).start()
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def _calculate_all(self):
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self._calculate_verts()
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self._calculate_cverts()
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def _calculate_verts(self):
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if self._calculating_verts.is_set():
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return
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self._calculating_verts.set()
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try:
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self._on_calculate_verts()
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finally:
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self._calculating_verts.clear()
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if callable(self.bounds_callback):
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self.bounds_callback()
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def _calculate_cverts(self):
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if self._calculating_verts.is_set():
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return
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while self._calculating_cverts.is_set():
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sleep(0) # wait for previous calculation
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self._calculating_cverts.set()
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try:
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self._on_calculate_cverts()
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finally:
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self._calculating_cverts.clear()
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def _get_calculating_verts(self):
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return self._calculating_verts.is_set()
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def _get_calculating_verts_pos(self):
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return self._calculating_verts_pos
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def _get_calculating_verts_len(self):
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return self._calculating_verts_len
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def _get_calculating_cverts(self):
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return self._calculating_cverts.is_set()
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def _get_calculating_cverts_pos(self):
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return self._calculating_cverts_pos
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def _get_calculating_cverts_len(self):
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return self._calculating_cverts_len
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## Property handlers
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def _get_style(self):
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return self._style
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@synchronized
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def _set_style(self, v):
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if v is None:
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return
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if v == '':
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step_max = 0
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for i in self.intervals:
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if i.v_steps is None:
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continue
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step_max = max([step_max, int(i.v_steps)])
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v = ['both', 'solid'][step_max > 40]
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if v not in self.styles:
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raise ValueError("v should be there in self.styles")
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if v == self._style:
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return
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self._style = v
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def _get_color(self):
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return self._color
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@synchronized
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def _set_color(self, v):
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try:
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if v is not None:
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if is_sequence(v):
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v = ColorScheme(*v)
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else:
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v = ColorScheme(v)
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if repr(v) == repr(self._color):
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return
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self._on_change_color(v)
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self._color = v
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except Exception as e:
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raise RuntimeError("Color change failed. "
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"Reason: %s" % (str(e)))
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style = property(_get_style, _set_style)
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color = property(_get_color, _set_color)
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calculating_verts = property(_get_calculating_verts)
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calculating_verts_pos = property(_get_calculating_verts_pos)
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calculating_verts_len = property(_get_calculating_verts_len)
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calculating_cverts = property(_get_calculating_cverts)
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calculating_cverts_pos = property(_get_calculating_cverts_pos)
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calculating_cverts_len = property(_get_calculating_cverts_len)
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## String representations
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def __str__(self):
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f = ", ".join(str(d) for d in self.d_vars)
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o = "'mode=%s'" % (self.primary_alias)
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return ", ".join([f, o])
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def __repr__(self):
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f = ", ".join(str(d) for d in self.d_vars)
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i = ", ".join(str(i) for i in self.intervals)
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d = [('mode', self.primary_alias),
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('color', str(self.color)),
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('style', str(self.style))]
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o = "'%s'" % ("; ".join("%s=%s" % (k, v)
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for k, v in d if v != 'None'))
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return ", ".join([f, i, o])
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