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