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# This file is part of the Printrun suite.
#
# Printrun is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Printrun is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Printrun. If not, see <http://www.gnu.org/licenses/>.
from threading import Lock
import logging
import traceback
import numpy
import numpy.linalg
import wx
from wx import glcanvas
import pyglet
pyglet.options['debug_gl'] = True
from pyglet.gl import glEnable, glDisable, GL_LIGHTING, glLightfv, \
GL_LIGHT0, GL_LIGHT1, GL_LIGHT2, GL_POSITION, GL_DIFFUSE, \
GL_AMBIENT, GL_SPECULAR, GL_COLOR_MATERIAL, \
glShadeModel, GL_SMOOTH, GL_NORMALIZE, \
GL_BLEND, glBlendFunc, glClear, glClearColor, \
glClearDepth, GL_COLOR_BUFFER_BIT, GL_CULL_FACE, \
GL_DEPTH_BUFFER_BIT, glDepthFunc, GL_DEPTH_TEST, \
GLdouble, glGetDoublev, glGetIntegerv, GLint, \
GL_LEQUAL, glLoadIdentity, glMatrixMode, GL_MODELVIEW, \
GL_MODELVIEW_MATRIX, GL_ONE_MINUS_SRC_ALPHA, glOrtho, \
GL_PROJECTION, GL_PROJECTION_MATRIX, glScalef, \
GL_SRC_ALPHA, glTranslatef, gluPerspective, gluUnProject, \
glViewport, GL_VIEWPORT, glPushMatrix, glPopMatrix, \
glBegin, glVertex2f, glVertex3f, glEnd, GL_LINE_LOOP, glColor3f, \
GL_LINE_STIPPLE, glColor4f, glLineStipple
from pyglet import gl
from .trackball import trackball, mulquat, axis_to_quat
from .libtatlin.actors import vec
from pyglet.gl.glu import gluOrtho2D
# When Subclassing wx.Window in Windows the focus goes to the wx.Window
# instead of GLCanvas and it does not draw the focus rectangle and
# does not consume used keystrokes
# BASE_CLASS = wx.Window
# Subclassing Panel solves problem In Windows
BASE_CLASS = wx.Panel
# BASE_CLASS = wx.ScrolledWindow
# BASE_CLASS = glcanvas.GLCanvas
class wxGLPanel(BASE_CLASS):
'''A simple class for using OpenGL with wxPython.'''
orbit_control = True
orthographic = True
color_background = (0.98, 0.98, 0.78, 1)
do_lights = True
def __init__(self, parent, pos = wx.DefaultPosition,
size = wx.DefaultSize, style = 0,
antialias_samples = 0):
# Full repaint should not be a performance problem
#TODO: test on windows, tested in Ubuntu
style = style | wx.FULL_REPAINT_ON_RESIZE
self.GLinitialized = False
self.mview_initialized = False
attribList = [glcanvas.WX_GL_RGBA, # RGBA
glcanvas.WX_GL_DOUBLEBUFFER, # Double Buffered
glcanvas.WX_GL_DEPTH_SIZE, 24 # 24 bit
]
if antialias_samples > 0 and hasattr(glcanvas, "WX_GL_SAMPLE_BUFFERS"):
attribList += (glcanvas.WX_GL_SAMPLE_BUFFERS, 1,
glcanvas.WX_GL_SAMPLES, antialias_samples)
attribList.append(0)
if BASE_CLASS is glcanvas.GLCanvas:
super().__init__(parent, wx.ID_ANY, attribList, pos, size, style)
self.canvas = self
else:
super().__init__(parent, wx.ID_ANY, pos, size, style)
self.canvas = glcanvas.GLCanvas(self, wx.ID_ANY, attribList, pos, size, style)
self.width = self.height = None
self.context = glcanvas.GLContext(self.canvas)
self.rot_lock = Lock()
self.basequat = [0, 0, 0, 1]
self.zoom_factor = 1.0
self.angle_z = 0
self.angle_x = 0
self.gl_broken = False
# bind events
self.canvas.Bind(wx.EVT_SIZE, self.processSizeEvent)
if self.canvas is not self:
self.Bind(wx.EVT_SIZE, self.OnScrollSize)
# do not focus parent (panel like) but its canvas
self.SetCanFocus(False)
self.canvas.Bind(wx.EVT_ERASE_BACKGROUND, self.processEraseBackgroundEvent)
# In wxWidgets 3.0.x there is a clipping bug during resizing
# which could be affected by painting the container
# self.Bind(wx.EVT_PAINT, self.processPaintEvent)
# Upgrade to wxPython 4.1 recommended
self.canvas.Bind(wx.EVT_PAINT, self.processPaintEvent)
self.canvas.Bind(wx.EVT_SET_FOCUS, self.processFocus)
self.canvas.Bind(wx.EVT_KILL_FOCUS, self.processKillFocus)
def processFocus(self, ev):
# print('processFocus')
self.Refresh(False)
ev.Skip()
def processKillFocus(self, ev):
# print('processKillFocus')
self.Refresh(False)
ev.Skip()
# def processIdle(self, event):
# print('processIdle')
# event.Skip()
def Layout(self):
return super().Layout()
def Refresh(self, eraseback=True):
# print('Refresh')
return super().Refresh(eraseback)
def OnScrollSize(self, event):
self.canvas.SetSize(event.Size)
def processEraseBackgroundEvent(self, event):
'''Process the erase background event.'''
pass # Do nothing, to avoid flashing on MSWin
def processSizeEvent(self, event):
'''Process the resize event.'''
# print('processSizeEvent frozen', self.IsFrozen(), event.Size.x, self.ClientSize.x)
if not self.IsFrozen() and self.canvas.IsShownOnScreen():
# Make sure the frame is shown before calling SetCurrent.
self.canvas.SetCurrent(self.context)
self.OnReshape()
# self.Refresh(False)
# print('Refresh')
event.Skip()
def processPaintEvent(self, event):
'''Process the drawing event.'''
# print('wxGLPanel.processPaintEvent', self.ClientSize.Width)
self.canvas.SetCurrent(self.context)
if not self.gl_broken:
try:
self.OnInitGL()
self.DrawCanvas()
except pyglet.gl.lib.GLException:
self.gl_broken = True
logging.error(_("OpenGL failed, disabling it:")
+ "\n" + traceback.format_exc())
event.Skip()
def Destroy(self):
# clean up the pyglet OpenGL context
self.pygletcontext.destroy()
# call the super method
super().Destroy()
# ==========================================================================
# GLFrame OpenGL Event Handlers
# ==========================================================================
def OnInitGL(self, call_reshape = True):
'''Initialize OpenGL for use in the window.'''
if self.GLinitialized:
return
self.GLinitialized = True
# create a pyglet context for this panel
self.pygletcontext = gl.Context(gl.current_context)
self.pygletcontext.canvas = self
self.pygletcontext.set_current()
# normal gl init
glClearColor(*self.color_background)
glClearDepth(1.0) # set depth value to 1
glDepthFunc(GL_LEQUAL)
glEnable(GL_COLOR_MATERIAL)
glEnable(GL_DEPTH_TEST)
glEnable(GL_CULL_FACE)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
if call_reshape:
self.OnReshape()
def OnReshape(self):
"""Reshape the OpenGL viewport based on the size of the window"""
size = self.GetClientSize() * self.GetContentScaleFactor()
oldwidth, oldheight = self.width, self.height
width, height = size.width, size.height
if width < 1 or height < 1:
return
self.width = max(float(width), 1.0)
self.height = max(float(height), 1.0)
self.OnInitGL(call_reshape = False)
# print('glViewport', width)
glViewport(0, 0, width, height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
if self.orthographic:
glOrtho(-width / 2, width / 2, -height / 2, height / 2,
-5 * self.dist, 5 * self.dist)
else:
gluPerspective(60., float(width) / height, 10.0, 3 * self.dist)
glTranslatef(0, 0, -self.dist) # Move back
glMatrixMode(GL_MODELVIEW)
if not self.mview_initialized:
self.reset_mview(0.9)
self.mview_initialized = True
elif oldwidth is not None and oldheight is not None:
wratio = self.width / oldwidth
hratio = self.height / oldheight
factor = min(wratio * self.zoomed_width, hratio * self.zoomed_height)
x, y, _ = self.mouse_to_3d(self.width / 2, self.height / 2)
self.zoom(factor, (x, y))
self.zoomed_width *= wratio / factor
self.zoomed_height *= hratio / factor
# Wrap text to the width of the window
if self.GLinitialized:
self.pygletcontext.set_current()
self.update_object_resize()
def setup_lights(self):
if not self.do_lights:
return
glEnable(GL_LIGHTING)
glDisable(GL_LIGHT0)
glLightfv(GL_LIGHT0, GL_AMBIENT, vec(0.4, 0.4, 0.4, 1.0))
glLightfv(GL_LIGHT0, GL_SPECULAR, vec(0, 0, 0, 0))
glLightfv(GL_LIGHT0, GL_DIFFUSE, vec(0, 0, 0, 0))
glEnable(GL_LIGHT1)
glLightfv(GL_LIGHT1, GL_AMBIENT, vec(0, 0, 0, 1.0))
glLightfv(GL_LIGHT1, GL_SPECULAR, vec(0.6, 0.6, 0.6, 1.0))
glLightfv(GL_LIGHT2, GL_DIFFUSE, vec(0.8, 0.8, 0.8, 1))
glLightfv(GL_LIGHT1, GL_POSITION, vec(1, 2, 3, 0))
glEnable(GL_LIGHT2)
glLightfv(GL_LIGHT2, GL_AMBIENT, vec(0, 0, 0, 1.0))
glLightfv(GL_LIGHT2, GL_SPECULAR, vec(0.6, 0.6, 0.6, 1.0))
glLightfv(GL_LIGHT2, GL_DIFFUSE, vec(0.8, 0.8, 0.8, 1))
glLightfv(GL_LIGHT2, GL_POSITION, vec(-1, -1, 3, 0))
glEnable(GL_NORMALIZE)
glShadeModel(GL_SMOOTH)
def reset_mview(self, factor):
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
self.setup_lights()
if self.orthographic:
wratio = self.width / self.dist
hratio = self.height / self.dist
minratio = float(min(wratio, hratio))
self.zoom_factor = 1.0
self.zoomed_width = wratio / minratio
self.zoomed_height = hratio / minratio
glScalef(factor * minratio, factor * minratio, 1)
def DrawCanvas(self):
"""Draw the window."""
#import time
#start = time.perf_counter()
# print('DrawCanvas', self.canvas.GetClientRect())
self.pygletcontext.set_current()
glClearColor(*self.color_background)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
self.draw_objects()
if self.canvas.HasFocus():
self.drawFocus()
self.canvas.SwapBuffers()
#print('Draw took', '%.2f'%(time.perf_counter()-start))
def drawFocus(self):
glColor4f(0, 0, 0, 0.4)
glPushMatrix()
glLoadIdentity()
glMatrixMode(GL_PROJECTION)
glPushMatrix()
glLoadIdentity()
gluOrtho2D(0, self.width, 0, self.height)
glLineStipple(1, 0xf0f0)
glEnable(GL_LINE_STIPPLE)
glBegin(GL_LINE_LOOP)
glVertex2f(1, 0)
glVertex2f(self.width, 0)
glVertex2f(self.width, self.height-1)
glVertex2f(1, self.height-1)
glEnd()
glDisable(GL_LINE_STIPPLE)
glPopMatrix() # restore PROJECTION
glMatrixMode(GL_MODELVIEW)
glPopMatrix()
# ==========================================================================
# To be implemented by a sub class
# ==========================================================================
def create_objects(self):
'''create opengl objects when opengl is initialized'''
pass
def update_object_resize(self):
'''called when the window receives only if opengl is initialized'''
pass
def draw_objects(self):
'''called in the middle of ondraw after the buffer has been cleared'''
pass
# ==========================================================================
# Utils
# ==========================================================================
def get_modelview_mat(self, local_transform):
mvmat = (GLdouble * 16)()
glGetDoublev(GL_MODELVIEW_MATRIX, mvmat)
return mvmat
def mouse_to_3d(self, x, y, z = 1.0, local_transform = False):
x = float(x)
y = self.height - float(y)
# The following could work if we were not initially scaling to zoom on
# the bed
# if self.orthographic:
# return (x - self.width / 2, y - self.height / 2, 0)
pmat = (GLdouble * 16)()
mvmat = self.get_modelview_mat(local_transform)
viewport = (GLint * 4)()
px = (GLdouble)()
py = (GLdouble)()
pz = (GLdouble)()
glGetIntegerv(GL_VIEWPORT, viewport)
glGetDoublev(GL_PROJECTION_MATRIX, pmat)
glGetDoublev(GL_MODELVIEW_MATRIX, mvmat)
gluUnProject(x, y, z, mvmat, pmat, viewport, px, py, pz)
return (px.value, py.value, pz.value)
def mouse_to_ray(self, x, y, local_transform = False):
x = float(x)
y = self.height - float(y)
pmat = (GLdouble * 16)()
mvmat = (GLdouble * 16)()
viewport = (GLint * 4)()
px = (GLdouble)()
py = (GLdouble)()
pz = (GLdouble)()
glGetIntegerv(GL_VIEWPORT, viewport)
glGetDoublev(GL_PROJECTION_MATRIX, pmat)
mvmat = self.get_modelview_mat(local_transform)
gluUnProject(x, y, 1, mvmat, pmat, viewport, px, py, pz)
ray_far = (px.value, py.value, pz.value)
gluUnProject(x, y, 0., mvmat, pmat, viewport, px, py, pz)
ray_near = (px.value, py.value, pz.value)
return ray_near, ray_far
def mouse_to_plane(self, x, y, plane_normal, plane_offset, local_transform = False):
# Ray/plane intersection
ray_near, ray_far = self.mouse_to_ray(x, y, local_transform)
ray_near = numpy.array(ray_near)
ray_far = numpy.array(ray_far)
ray_dir = ray_far - ray_near
ray_dir = ray_dir / numpy.linalg.norm(ray_dir)
plane_normal = numpy.array(plane_normal)
q = ray_dir.dot(plane_normal)
if q == 0:
return None
t = - (ray_near.dot(plane_normal) + plane_offset) / q
if t < 0:
return None
return ray_near + t * ray_dir
def zoom(self, factor, to = None):
glMatrixMode(GL_MODELVIEW)
if to:
delta_x = to[0]
delta_y = to[1]
glTranslatef(delta_x, delta_y, 0)
glScalef(factor, factor, 1)
self.zoom_factor *= factor
if to:
glTranslatef(-delta_x, -delta_y, 0)
# For wxPython (<4.1) and GTK:
# when you resize (enlarge) 3d view fast towards the log pane
# sash garbage may remain in GLCanvas
# The following refresh clears it at the cost of
# doubled frame draws.
# wx.CallAfter(self.Refresh)
self.Refresh(False)
def zoom_to_center(self, factor):
self.canvas.SetCurrent(self.context)
x, y, _ = self.mouse_to_3d(self.width / 2, self.height / 2)
self.zoom(factor, (x, y))
def orbit(self, p1x, p1y, p2x, p2y):
rz = p2x-p1x
self.angle_z-=rz
rotz = axis_to_quat([0.0,0.0,1.0],self.angle_z)
rx = p2y-p1y
self.angle_x+=rx
rota = axis_to_quat([1.0,0.0,0.0],self.angle_x)
return mulquat(rotz,rota)
def handle_rotation(self, event):
content_scale_factor = self.GetContentScaleFactor()
if self.initpos is None:
self.initpos = event.GetPosition() * content_scale_factor
else:
p1 = self.initpos
p2 = event.GetPosition() * content_scale_factor
sz = self.GetClientSize() * content_scale_factor
p1x = p1[0] / (sz[0] / 2) - 1
p1y = 1 - p1[1] / (sz[1] / 2)
p2x = p2[0] / (sz[0] / 2) - 1
p2y = 1 - p2[1] / (sz[1] / 2)
quat = trackball(p1x, p1y, p2x, p2y, self.dist / 250.0)
with self.rot_lock:
if self.orbit_control:
self.basequat = self.orbit(p1x, p1y, p2x, p2y)
else:
self.basequat = mulquat(self.basequat, quat)
self.initpos = p2
def handle_translation(self, event):
content_scale_factor = self.GetContentScaleFactor()
if self.initpos is None:
self.initpos = event.GetPosition() * content_scale_factor
else:
p1 = self.initpos
p2 = event.GetPosition() * content_scale_factor
if self.orthographic:
x1, y1, _ = self.mouse_to_3d(p1[0], p1[1])
x2, y2, _ = self.mouse_to_3d(p2[0], p2[1])
glTranslatef(x2 - x1, y2 - y1, 0)
else:
glTranslatef(p2[0] - p1[0], -(p2[1] - p1[1]), 0)
self.initpos = p2
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