stlview.py

#!/usr/bin/python

# 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/>.

import os
import math
import stltool
import wx
from wx import glcanvas
import time
import threading

import pyglet
pyglet.options['shadow_window'] = False
pyglet.options['debug_gl'] = False
from pyglet.gl import *


class GLPanel(wx.Panel):
    '''A simple class for using OpenGL with wxPython.'''

    def __init__(self, parent, id, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):
        # Forcing a no full repaint to stop flickering
        style = style | wx.NO_FULL_REPAINT_ON_RESIZE
        #call super function
        super(GLPanel, self).__init__(parent, id, pos, size, style)

        #init gl canvas data
        self.GLinitialized = False
        attribList = (glcanvas.WX_GL_RGBA,  # RGBA
                      glcanvas.WX_GL_DOUBLEBUFFER,  # Double Buffered
                      glcanvas.WX_GL_DEPTH_SIZE, 24)  # 24 bit
        # Create the canvas
        self.sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.canvas = glcanvas.GLCanvas(self, attribList=attribList)
        self.sizer.Add(self.canvas, 1, wx.EXPAND)
        self.SetSizer(self.sizer)
        #self.sizer.Fit(self)
        self.Layout()

        # bind events
        self.canvas.Bind(wx.EVT_ERASE_BACKGROUND, self.processEraseBackgroundEvent)
        self.canvas.Bind(wx.EVT_SIZE, self.processSizeEvent)
        self.canvas.Bind(wx.EVT_PAINT, self.processPaintEvent)

    #==========================================================================
    # Canvas Proxy Methods
    #==========================================================================
    def GetGLExtents(self):
        '''Get the extents of the OpenGL canvas.'''
        return self.canvas.GetClientSize()

    def SwapBuffers(self):
        '''Swap the OpenGL buffers.'''
        self.canvas.SwapBuffers()

    #==========================================================================
    # wxPython Window Handlers
    #==========================================================================
    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.'''
        if self.canvas.GetContext():
            # Make sure the frame is shown before calling SetCurrent.
            self.Show()
            self.canvas.SetCurrent()
            size = self.GetGLExtents()
            self.winsize = (size.width, size.height)
            self.width, self.height = size.width, size.height
            self.OnReshape(size.width, size.height)
            self.canvas.Refresh(False)
        event.Skip()

    def processPaintEvent(self, event):
        '''Process the drawing event.'''
        self.canvas.SetCurrent()

        # This is a 'perfect' time to initialize OpenGL ... only if we need to
        if not self.GLinitialized:
            self.OnInitGL()
            self.GLinitialized = True

        self.OnDraw()
        event.Skip()

    def Destroy(self):
        #clean up the pyglet OpenGL context
        #self.pygletcontext.destroy()
        #call the super method
        super(wx.Panel, self).Destroy()

    #==========================================================================
    # GLFrame OpenGL Event Handlers
    #==========================================================================
    def OnInitGL(self):
        '''Initialize OpenGL for use in the window.'''
        #create a pyglet context for this panel
        self.pmat = (GLdouble * 16)()
        self.mvmat = (GLdouble * 16)()
        self.pygletcontext = Context(current_context)
        self.pygletcontext.set_current()
        self.dist = 1000
        self.vpmat = None
        #normal gl init
        glClearColor(0, 0, 0, 1)
        glColor3f(1, 0, 0)
        glEnable(GL_DEPTH_TEST)
        glEnable(GL_CULL_FACE)
        # Uncomment this line for a wireframe view
        #glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)

        # Simple light setup.  On Windows GL_LIGHT0 is enabled by default,
        # but this is not the case on Linux or Mac, so remember to always
        # include it.
        glEnable(GL_LIGHTING)
        glEnable(GL_LIGHT0)
        glEnable(GL_LIGHT1)

        # Define a simple function to create ctypes arrays of floats:
        def vec(*args):
            return (GLfloat * len(args))(*args)

        glLightfv(GL_LIGHT0, GL_POSITION, vec(.5, .5, 1, 0))
        glLightfv(GL_LIGHT0, GL_SPECULAR, vec(.5, .5, 1, 1))
        glLightfv(GL_LIGHT0, GL_DIFFUSE, vec(1, 1, 1, 1))
        glLightfv(GL_LIGHT1, GL_POSITION, vec(1, 0, .5, 0))
        glLightfv(GL_LIGHT1, GL_DIFFUSE, vec(.5, .5, .5, 1))
        glLightfv(GL_LIGHT1, GL_SPECULAR, vec(1, 1, 1, 1))

        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.5, 0, 0.3, 1))
        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, vec(1, 1, 1, 1))
        glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 50)
        glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, vec(0, 0.1, 0, 0.9))
        #create objects to draw
        #self.create_objects()

    def OnReshape(self, width, height):
        '''Reshape the OpenGL viewport based on the dimensions of the window.'''

        if not self.GLinitialized:
            self.OnInitGL()
            self.GLinitialized = True
        self.pmat = (GLdouble * 16)()
        self.mvmat = (GLdouble * 16)()
        glViewport(0, 0, width, height)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        gluPerspective(60., width / float(height), .1, 1000.)
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()
        #pyglet stuff
        self.vpmat = (GLint * 4)(0, 0, *list(self.GetClientSize()))
        glGetDoublev(GL_PROJECTION_MATRIX, self.pmat)
        glGetDoublev(GL_MODELVIEW_MATRIX, self.mvmat)
        #glMatrixMode(GL_PROJECTION)

        # Wrap text to the width of the window
        if self.GLinitialized:
            self.pygletcontext.set_current()
            self.update_object_resize()

    def OnDraw(self, *args, **kwargs):
        """Draw the window."""
        #clear the context
        self.canvas.SetCurrent()
        self.pygletcontext.set_current()
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        #draw objects
        self.draw_objects()
        #update screen
        self.SwapBuffers()

    #==========================================================================
    # 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 recieves only if opengl is initialized'''
        pass

    def draw_objects(self):
        '''called in the middle of ondraw after the buffer has been cleared'''
        pass


class stlview(object):
    def __init__(self, facets, batch):
        # Create the vertex and normal arrays.
        vertices = []
        normals = []

        for i in facets:
            for j in i[1]:
                vertices.extend(j)
                normals.extend(i[0])

        # Create a list of triangle indices.
        indices = range(3 * len(facets))  # [[3*i,3*i+1,3*i+2] for i in xrange(len(facets))]
        #print indices[:10]
        self.vertex_list = batch.add_indexed(len(vertices) // 3,
                                             GL_TRIANGLES,
                                             None,  # group,
                                             indices,
                                             ('v3f/static', vertices),
                                             ('n3f/static', normals))

    def delete(self):
        self.vertex_list.delete()


def vdiff(v, o):
    return [x[0] - x[1] for x in zip(v, o)]


class gcview(object):
    def __init__(self, lines, batch, w=0.5, h=0.5):
        # Create the vertex and normal arrays.
        vertices = []
        normals = []
        self.prev = [0.001, 0.001, 0.001, 0.001]
        self.fline = 1
        self.vlists = []
        self.layers = {}
        t0 = time.time()
        lines = [self.transform(i) for i in lines]
        lines = [i for i in lines if i is not None]
        print "transformed lines in %fs" % (time.time() - t0)
        t0 = time.time()
        layertemp = {}
        lasth = None
        counter = 0
        if len(lines) == 0:
            return
        for i in lines:
            counter += 1
            if i[0][2] not in layertemp:
                layertemp[i[0][2]] = [[], []]
                if lasth is not None:
                    self.layers[lasth] = pyglet.graphics.Batch()
                    lt = layertemp[lasth][0]
                    indices = range(len(layertemp[lasth][0]) // 3)  # [[3*i,3*i+1,3*i+2] for i in xrange(len(facets))]
                    self.vlists.append(self.layers[lasth].add_indexed(len(layertemp[lasth][0]) // 3,
                                             GL_TRIANGLES,
                                             None,  # group,
                                             indices,
                                             ('v3f/static', layertemp[lasth][0]),
                                             ('n3f/static', layertemp[lasth][1])))

                lasth = i[0][2]

            spoints, epoints, S, E = self.genline(i, h, w)

            verticestoadd = [[
                    spoints[(j + 1) % 8],
                    epoints[(j) % 8],
                    spoints[j],
                    epoints[j],
                    spoints[(j + 1) % 8],
                    epoints[(j + 1) % 8]
                ] for j in xrange(8)]
            normalstoadd = [map(vdiff, v, [S, E, S, E, S, E]) for v in verticestoadd]
            v1 = []
            map(v1.extend, verticestoadd)
            v2 = []
            map(v2.extend, v1)
            n1 = []
            map(n1.extend, normalstoadd)
            n2 = []
            map(n2.extend, n1)

            layertemp[i[0][2]][0] += v2
            vertices += v2
            layertemp[i[0][2]][1] += n2
            normals += n2
        print "appended lines in %fs" % (time.time() - t0)
        t0 = time.time()

        # Create a list of triangle indices.
        indices = range(3 * 16 * len(lines))  # [[3*i,3*i+1,3*i+2] for i in xrange(len(facets))]
        self.vlists.append(batch.add_indexed(len(vertices) // 3,
                                             GL_TRIANGLES,
                                             None,  # group,
                                             indices,
                                             ('v3f/static', vertices),
                                             ('n3f/static', normals)))
        if lasth is not None:
                    self.layers[lasth] = pyglet.graphics.Batch()
                    indices = range(len(layertemp[lasth][0]))  # [[3*i,3*i+1,3*i+2] for i in xrange(len(facets))]
                    self.vlists.append(self.layers[lasth].add_indexed(len(layertemp[lasth][0]) // 3,
                                             GL_TRIANGLES,
                                             None,  # group,
                                             indices,
                                             ('v3f/static', layertemp[lasth][0]),
                                             ('n3f/static', layertemp[lasth][1])))

    def genline(self, i, h, w):
        S = i[0][:3]
        E = i[1][:3]
        v = map(lambda x, y: x - y, E, S)
        vlen = math.sqrt(float(sum(map(lambda a: a * a, v[:3]))))

        if vlen == 0:
            vlen = 0.01
        sq2 = math.sqrt(2.0) / 2.0
        htw = float(h) / w
        d = w / 2.0
        if i[1][3] == i[0][3]:
            d = 0.05
        points = [[d, 0, 0],
                [sq2 * d, sq2 * d, 0],
                [0, d, 0],
                [-sq2 * d, sq2 * d, 0],
                [-d, 0, 0],
                [-sq2 * d, -sq2 * d, 0],
                [0, -d, 0],
                [sq2 * d, -sq2 * d, 0]
            ]
        axis = stltool.cross([0, 0, 1], v)
        alen = math.sqrt(float(sum(map(lambda a: a * a, v[:3]))))
        if alen > 0:
            axis = map(lambda m: m / alen, axis)
            angle = math.acos(v[2] / vlen)

            def vrot(v, axis, angle):
                kxv = stltool.cross(axis, v)
                kdv = sum(map(lambda x, y: x * y, axis, v))
                return map(lambda x, y, z: x * math.cos(angle) + y * math.sin(angle) + z * kdv * (1.0 - math.cos(angle)), v, kxv, axis)

            points = map(lambda x: vrot(x, axis, angle), points)
        points = map(lambda x: [x[0], x[1], htw * x[2]], points)

        def vadd(v, o):
            return map(sum, zip(v, o))
        spoints = map(lambda x: vadd(S, x), points)
        epoints = map(lambda x: vadd(E, x), points)
        return spoints, epoints, S, E

    def transform(self, line):
            line = line.split(";")[0]
            cur = self.prev[:]
            if len(line) > 0:
                if "G1" in line or "G0" in line or "G92" in line:
                    if("X" in line):
                        cur[0] = float(line.split("X")[1].split(" ")[0])
                    if("Y" in line):
                        cur[1] = float(line.split("Y")[1].split(" ")[0])
                    if("Z" in line):
                        cur[2] = float(line.split("Z")[1].split(" ")[0])
                    if("E" in line):
                        cur[3] = float(line.split("E")[1].split(" ")[0])
                    if self.prev == cur:
                        return None
                    if self.fline or "G92" in line:
                        self.prev = cur
                        self.fline = 0
                        return None
                    else:
                        r = [self.prev, cur]
                        self.prev = cur
                        return r

    def delete(self):
        for i in self.vlists:
            i.delete()
        self.vlists = []


def trackball(p1x, p1y, p2x, p2y, r):
    TRACKBALLSIZE = r
#float a[3]; /* Axis of rotation */
#float phi;  /* how much to rotate about axis */
#float p1[3], p2[3], d[3];
#float t;

    if (p1x == p2x and p1y == p2y):
        return [0.0, 0.0, 0.0, 1.0]

    p1 = [p1x, p1y, project_to_sphere(TRACKBALLSIZE, p1x, p1y)]
    p2 = [p2x, p2y, project_to_sphere(TRACKBALLSIZE, p2x, p2y)]
    a = stltool.cross(p2, p1)

    d = map(lambda x, y: x - y, p1, p2)
    t = math.sqrt(sum(map(lambda x: x * x, d))) / (2.0 * TRACKBALLSIZE)

    if (t > 1.0):
        t = 1.0
    if (t < -1.0):
        t = -1.0
    phi = 2.0 * math.asin(t)

    return axis_to_quat(a, phi)


def vec(*args):
    return (GLfloat * len(args))(*args)


def axis_to_quat(a, phi):
    #print a, phi
    lena = math.sqrt(sum(map(lambda x: x * x, a)))
    q = map(lambda x: x * (1 / lena), a)
    q = map(lambda x: x * math.sin(phi / 2.0), q)
    q.append(math.cos(phi / 2.0))
    return q


def build_rotmatrix(q):
    m = (GLdouble * 16)()
    m[0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2])
    m[1] = 2.0 * (q[0] * q[1] - q[2] * q[3])
    m[2] = 2.0 * (q[2] * q[0] + q[1] * q[3])
    m[3] = 0.0

    m[4] = 2.0 * (q[0] * q[1] + q[2] * q[3])
    m[5] = 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0])
    m[6] = 2.0 * (q[1] * q[2] - q[0] * q[3])
    m[7] = 0.0

    m[8] = 2.0 * (q[2] * q[0] - q[1] * q[3])
    m[9] = 2.0 * (q[1] * q[2] + q[0] * q[3])
    m[10] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0])
    m[11] = 0.0

    m[12] = 0.0
    m[13] = 0.0
    m[14] = 0.0
    m[15] = 1.0
    return m


def project_to_sphere(r, x, y):
    d = math.sqrt(x * x + y * y)
    if (d < r * 0.70710678118654752440):
        return math.sqrt(r * r - d * d)
    else:
        t = r / 1.41421356237309504880
        return t * t / d


def mulquat(q1, rq):
    return [q1[3] * rq[0] + q1[0] * rq[3] + q1[1] * rq[2] - q1[2] * rq[1],
                    q1[3] * rq[1] + q1[1] * rq[3] + q1[2] * rq[0] - q1[0] * rq[2],
                    q1[3] * rq[2] + q1[2] * rq[3] + q1[0] * rq[1] - q1[1] * rq[0],
                    q1[3] * rq[3] - q1[0] * rq[0] - q1[1] * rq[1] - q1[2] * rq[2]]


class TestGlPanel(GLPanel):

    def __init__(self, parent, size, id=wx.ID_ANY):
        super(TestGlPanel, self).__init__(parent, id, wx.DefaultPosition, size, 0)
        self.batches = []
        self.rot = 0
        self.canvas.Bind(wx.EVT_MOUSE_EVENTS, self.move)
        self.canvas.Bind(wx.EVT_LEFT_DCLICK, self.double)
        self.initialized = 1
        self.canvas.Bind(wx.EVT_MOUSEWHEEL, self.wheel)
        self.parent = parent
        self.initpos = None
        self.dist = 200
        self.bedsize = [200, 200]
        self.transv = [0, 0, -self.dist]
        self.basequat = [0, 0, 0, 1]
        wx.CallAfter(self.forceresize)
        self.mousepos = [0, 0]

    def double(self, event):
        p = event.GetPositionTuple()
        sz = self.GetClientSize()
        v = map(lambda m, w, b: b * m / w, p, sz, self.bedsize)
        v[1] = self.bedsize[1] - v[1]
        v += [300]
        print v
        self.add_file("../prusa/metric-prusa/x-end-idler.stl", v)

    def forceresize(self):
        self.SetClientSize((self.GetClientSize()[0], self.GetClientSize()[1] + 1))
        self.SetClientSize((self.GetClientSize()[0], self.GetClientSize()[1] - 1))
        threading.Thread(target=self.update).start()
        self.initialized = 0

    def move_shape(self, delta):
        """moves shape (selected in l, which is list ListBox of shapes)
        by an offset specified in tuple delta.
        Positive numbers move to (rigt, down)"""
        name = self.parent.l.GetSelection()
        if name == wx.NOT_FOUND:
            return False

        name = self.parent.l.GetString(name)

        model = self.parent.models[name]
        model.offsets = [
                model.offsets[0] + delta[0],
                model.offsets[1] + delta[1],
                model.offsets[2]
            ]
        self.Refresh()
        return True

    def move(self, event):
        """react to mouse actions:
        no mouse: show red mousedrop
        LMB: move active object,
            with shift rotate viewport
        RMB: nothing
            with shift move viewport
        """
        if event.Dragging() and event.LeftIsDown():
            if self.initpos == None:
                self.initpos = event.GetPositionTuple()
            else:
                if not event.ShiftDown():
                    currentpos = event.GetPositionTuple()
                    delta = (
                            (currentpos[0] - self.initpos[0]),
                            -(currentpos[1] - self.initpos[1])
                        )
                    self.move_shape(delta)
                    self.initpos = None
                    return
                #print self.initpos
                p1 = self.initpos
                self.initpos = None
                p2 = event.GetPositionTuple()
                sz = self.GetClientSize()
                p1x = (float(p1[0]) - sz[0] / 2) / (sz[0] / 2)
                p1y = -(float(p1[1]) - sz[1] / 2) / (sz[1] / 2)
                p2x = (float(p2[0]) - sz[0] / 2) / (sz[0] / 2)
                p2y = -(float(p2[1]) - sz[1] / 2) / (sz[1] / 2)
                #print p1x,p1y,p2x,p2y
                quat = trackball(p1x, p1y, p2x, p2y, -self.transv[2] / 250.0)
                if self.rot:
                    self.basequat = mulquat(self.basequat, quat)
                #else:
                glGetDoublev(GL_MODELVIEW_MATRIX, self.mvmat)
                #self.basequat = quatx
                mat = build_rotmatrix(self.basequat)
                glLoadIdentity()
                glTranslatef(self.transv[0], self.transv[1], 0)
                glTranslatef(0, 0, self.transv[2])
                glMultMatrixd(mat)
                glGetDoublev(GL_MODELVIEW_MATRIX, self.mvmat)
                self.rot = 1

        elif event.ButtonUp(wx.MOUSE_BTN_LEFT):
            if self.initpos is not None:
                self.initpos = None
        elif event.ButtonUp(wx.MOUSE_BTN_RIGHT):
            if self.initpos is not None:
                self.initpos = None

        elif event.Dragging() and event.RightIsDown() and event.ShiftDown():
                if self.initpos is None:
                    self.initpos = event.GetPositionTuple()
                else:
                    p1 = self.initpos
                    p2 = event.GetPositionTuple()
                    sz = self.GetClientSize()
                    p1 = list(p1)
                    p2 = list(p2)
                    p1[1] *= -1
                    p2[1] *= -1

                    self.transv = map(lambda x, y, z, c: c - self.dist * (x - y) / z,  list(p1) + [0],  list(p2) + [0],  list(sz) + [1],  self.transv)

                    glLoadIdentity()
                    glTranslatef(self.transv[0], self.transv[1], 0)
                    glTranslatef(0, 0, self.transv[2])
                    if(self.rot):
                        glMultMatrixd(build_rotmatrix(self.basequat))
                    glGetDoublev(GL_MODELVIEW_MATRIX, self.mvmat)
                    self.rot = 1
                    self.initpos = None
        else:
            #mouse is moving without a button press
            p = event.GetPositionTuple()
            sz = self.GetClientSize()
            v = map(lambda m, w, b: b * m / w, p, sz, self.bedsize)
            v[1] = self.bedsize[1] - v[1]
            self.mousepos = v

    def rotate_shape(self, angle):
        """rotates acive shape
        positive angle is clockwise
        """
        name = self.parent.l.GetSelection()
        if name == wx.NOT_FOUND:
            return False
        name = self.parent.l.GetString(name)
        model = self.parent.models[name]
        model.rot += angle

    def wheel(self, event):
        """react to mouse wheel actions:
        rotate object
            with shift zoom viewport
        """
        z = event.GetWheelRotation()
        angle = 10
        if not event.ShiftDown():
            i = self.parent.l.GetSelection()

            if i < 0:
                try:
                    self.parent.setlayerindex(z)
                except:
                    pass
                return

            if z > 0:
                self.rotate_shape(angle / 2)
            else:
                self.rotate_shape(-angle / 2)
            return
        if z > 0:
            self.transv[2] += angle
        else:
            self.transv[2] -= angle

        glLoadIdentity()
        glTranslatef(*self.transv)
        if(self.rot):
            glMultMatrixd(build_rotmatrix(self.basequat))
        glGetDoublev(GL_MODELVIEW_MATRIX, self.mvmat)
        self.rot = 1

    def keypress(self, event):
        """gets keypress events and moves/rotates acive shape"""
        keycode = event.GetKeyCode()
        print keycode
        step = 5
        angle = 18
        if event.ControlDown():
            step = 1
            angle = 1
        #h
        if keycode == 72:
            self.move_shape((-step, 0))
        #l
        if keycode == 76:
            self.move_shape((step, 0))
        #j
        if keycode == 75:
            self.move_shape((0, step))
        #k
        if keycode == 74:
            self.move_shape((0, -step))
        #[
        if keycode == 91:
            self.rotate_shape(-angle)
        #]
        if keycode == 93:
            self.rotate_shape(angle)
        event.Skip()

    def update(self):
        while(1):
            dt = 0.05
            time.sleep(0.05)
            try:
                wx.CallAfter(self.Refresh)
            except:
                return

    def anim(self, obj):
        g = 50 * 9.8
        v = 20
        dt = 0.05
        basepos = obj.offsets[2]
        obj.offsets[2] += obj.animoffset
        while obj.offsets[2] > -1:
            time.sleep(dt)
            obj.offsets[2] -= v * dt
            v += g * dt
            if(obj.offsets[2] < 0):
                obj.scale[2] *= 1 - 3 * dt
        #return
        v = v / 4
        while obj.offsets[2] < basepos:
            time.sleep(dt)
            obj.offsets[2] += v * dt
            v -= g * dt
            obj.scale[2] *= 1 + 5 * dt
        obj.scale[2] = 1.0

    def create_objects(self):
        '''create opengl objects when opengl is initialized'''
        self.initialized = 1
        wx.CallAfter(self.Refresh)

    def drawmodel(self, m, n):
        batch = pyglet.graphics.Batch()
        stl = stlview(m.facets, batch=batch)
        m.batch = batch
        m.animoffset = 300
        #print m
        #threading.Thread(target = self.anim, args = (m, )).start()
        wx.CallAfter(self.Refresh)

    def update_object_resize(self):
        '''called when the window recieves only if opengl is initialized'''
        pass

    def draw_objects(self):
        '''called in the middle of ondraw after the buffer has been cleared'''
        if self.vpmat is None:
            return
        if not self.initialized:
            self.create_objects()

        #glLoadIdentity()
        #print list(self.pmat)
        if self.rot == 1:
            glLoadIdentity()
            glMultMatrixd(self.mvmat)
        else:
            glLoadIdentity()
            glTranslatef(*self.transv)
        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.2, 0.2, 0.2, 1))
        glBegin(GL_LINES)
        glNormal3f(0, 0, 1)
        rows = 10
        cols = 10
        zheight = 50
        for i in xrange(-rows, rows + 1):
            if i % 5 == 0:
                glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.6, 0.6, 0.6, 1))
            else:
                glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.2, 0.2, 0.2, 1))
            glVertex3f(10 * -cols, 10 * i, 0)
            glVertex3f(10 * cols, 10 * i, 0)
        for i in xrange(-cols, cols + 1):
            if i % 5 == 0:
                glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.6, 0.6, 0.6, 1))
            else:
                glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.2, 0.2, 0.2, 1))
            glVertex3f(10 * i, 10 * -rows, 0)
            glVertex3f(10 * i, 10 * rows, 0)
        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.6, 0.6, 0.6, 1))
        glVertex3f(10 * -cols, 10 * -rows, 0)
        glVertex3f(10 * -cols, 10 * -rows, zheight)
        glVertex3f(10 * cols, 10 * rows, 0)
        glVertex3f(10 * cols, 10 * rows, zheight)
        glVertex3f(10 * cols, 10 * -rows, 0)
        glVertex3f(10 * cols, 10 * -rows, zheight)
        glVertex3f(10 * -cols, 10 * rows, 0)
        glVertex3f(10 * -cols, 10 * rows, zheight)

        glVertex3f(10 * -cols, 10 * rows, zheight)
        glVertex3f(10 * cols, 10 * rows, zheight)
        glVertex3f(10 * cols, 10 * rows, zheight)
        glVertex3f(10 * cols, 10 * -rows, zheight)
        glVertex3f(10 * cols, 10 * -rows, zheight)
        glVertex3f(10 * -cols, 10 * -rows, zheight)
        glVertex3f(10 * -cols, 10 * -rows, zheight)
        glVertex3f(10 * -cols, 10 * rows, zheight)

        glEnd()
        glPushMatrix()
        glTranslatef(self.mousepos[0] - self.bedsize[0] / 2, self.mousepos[1] - self.bedsize[1] / 2, 0)
        glBegin(GL_TRIANGLES)
        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(1, 0, 0, 1))
        glNormal3f(0, 0, 1)
        glVertex3f(2, 2, 0)
        glVertex3f(-2, 2, 0)
        glVertex3f(-2, -2, 0)
        glVertex3f(2, -2, 0)
        glVertex3f(2, 2, 0)
        glVertex3f(-2, -2, 0)
        glEnd()
        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.3, 0.7, 0.5, 1))
        #glTranslatef(0, 40, 0)
        glPopMatrix()
        glPushMatrix()
        glTranslatef(-100, -100, 0)

        for i in self.parent.models.values():
            glPushMatrix()
            glTranslatef(*(i.offsets))
            glRotatef(i.rot, 0.0, 0.0, 1.0)
            glScalef(*i.scale)

            try:
                if i.curlayer in i.gc.layers:
                    glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.13, 0.37, 0.25, 1))
                    [i.gc.layers[j].draw() for j in i.gc.layers.keys() if j < i.curlayer]
                    glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.5, 0.6, 0.9, 1))
                    b = i.gc.layers[i.curlayer]
                    b.draw()
                else:
                    i.batch.draw()
            except:
                i.batch.draw()
            glPopMatrix()
        glPopMatrix()
        #print "drawn batch"


class GCFrame(wx.Frame):
    '''A simple class for using OpenGL with wxPython.'''

    def __init__(self, parent, ID, title, pos=wx.DefaultPosition,
            size=wx.DefaultSize, style=wx.DEFAULT_FRAME_STYLE):
        super(GCFrame, self).__init__(parent, ID, title, pos, (size[0] + 150, size[1]), style)

        class d:
            def GetSelection(self):
                return wx.NOT_FOUND
        self.p = self
        m = d()
        m.offsets = [0, 0, 0]
        m.rot = 0
        m.curlayer = 0.0
        m.scale = [1.0, 1.0, 1.0]
        m.batch = pyglet.graphics.Batch()
        m.gc = gcview([], batch=m.batch)
        self.models = {"": m}
        self.l = d()
        self.modelindex = 0
        self.GLPanel1 = TestGlPanel(self, size)

    def addfile(self, gcode=[]):
        self.models[""].gc.delete()
        self.models[""].gc = gcview(gcode, batch=self.models[""].batch)

    def clear(self):
        self.models[""].gc.delete()
        self.models[""].gc = gcview([], batch=self.models[""].batch)

    def Show(self, arg=True):
        wx.Frame.Show(self, arg)
        self.SetClientSize((self.GetClientSize()[0], self.GetClientSize()[1] + 1))
        self.SetClientSize((self.GetClientSize()[0], self.GetClientSize()[1] - 1))
        self.Refresh()
        wx.FutureCall(500, self.GLPanel1.forceresize)
        #threading.Thread(target = self.update).start()
        #self.initialized = 0

    def setlayerindex(self, z):
        m = self.models[""]
        mlk = sorted(m.gc.layers.keys())
        if z > 0 and self.modelindex < len(mlk) - 1:
            self.modelindex += 1
        if z < 0 and self.modelindex > 0:
            self.modelindex -= 1
        m.curlayer = mlk[self.modelindex]
        wx.CallAfter(self.SetTitle, "Gcode view, shift to move. Layer %d, Z = %f" % (self.modelindex, m.curlayer))


def main():
    app = wx.App(redirect=False)
    frame = GCFrame(None, wx.ID_ANY, 'Gcode view, shift to move view, mousewheel to set layer', size=(400, 400))
    frame.addfile(list(open("carriage dump_export.gcode")))
    #frame = wx.Frame(None, -1, "GL Window", size=(400, 400))
    #panel = TestGlPanel(frame)
    #frame.Show(True)
    #app.MainLoop()
    app.Destroy()

if __name__ == "__main__":
    import cProfile
    print cProfile.run("main()")