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annotate lightsim/openglsim.py @ 1392:361dbf72618f

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demo :live data for KC Ignore-this: 21e891896dbd83afb075ff06fb51c5f5
author Drew Perttula <drewp@bigasterisk.com>
date Thu, 09 Jun 2016 08:54:28 +0000
parents 61164aaadbaa
children
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1 #!/usr/bin/python2.4
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2 # see http://www.sgi.com/software/opengl/advanced97/notes/node57.html for accum notes
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3
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4 from __future__ import division
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5 import sys, time
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6 import numpy as num
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7 import Tkinter as tk
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8 import Image
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9 from louie import dispatcher
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10
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11 from PyQt4.QtCore import QSize
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12 from PyQt4.QtOpenGL import QGLWidget
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13 from OpenGL.GL import *
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14
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15 def xxxdrawWithAlpha(imgString, w, h, alpha):
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16 # this one should be faster because GL does the alpha adjust, but
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17 # i don't think it works yet
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18
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19 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
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20
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21 glClear(GL_COLOR_BUFFER_BIT)
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22 #glBlendColor(1, 1, 1, mag) # needs ARB_imaging
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23 glDrawPixels(w, h, GL_RGBA, GL_UNSIGNED_BYTE, imgString)
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24
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25 class Surface(QGLWidget):
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26 """widget that adds multiple image files together with adjustable scales"""
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27 def __init__(self, parent, filenames, imgRescaleTo=None):
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28 """
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29 imgRescaleTo can be a length of pixels to reduce all the input
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30 images into. Try 64 for a low res drawing.
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31 """
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32 QGLWidget.__init__(self, parent)
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33
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34 self.levels = {} # filename : brightness
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35
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36 self.image = {} # filename : imgstr
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37 for filename in filenames:
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38 print "open", filename
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39 im = Image.open(filename)
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40 self.origImageSize = im.size[0], im.size[1]
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41 if imgRescaleTo:
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42 im.thumbnail((imgRescaleTo, imgRescaleTo))
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43 im = im.transpose(Image.FLIP_TOP_BOTTOM)
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44 self.imageWidth = im.size[0]
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45 self.imageHeight = im.size[1]
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46 self.image[filename] = im.convert("RGBA").tostring()
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47
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48 def initializeGL(self):
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49 glDisable(GL_CULL_FACE)
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50 glShadeModel(GL_FLAT)
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51 print 'GL_ARB_imaging', 'GL_ARB_imaging' in glGetString(GL_EXTENSIONS)
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52 import OpenGL
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53 print OpenGL.__version__
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54
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55 def sizeHint(self):
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56 return QSize(*self.origImageSize)
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57
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58 def paintGL(self):
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59 """you set self.levels to dict and call tkRedraw"""
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60 assert 'GL_ARB_imaging' in glGetString(GL_EXTENSIONS).split()
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61 start = time.time()
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62
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63 glClearColor(0.0, 0.0, 0.0, 0)
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64 glClear( GL_COLOR_BUFFER_BIT |GL_ACCUM_BUFFER_BIT)
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65 glEnable(GL_BLEND)
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66 glBlendFunc(GL_SRC_ALPHA, GL_ONE) # add
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67
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68 # l=glGenLists(1)
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69 # glNewList(l,GL_COMPILE)
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70 # glEndList()
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71
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72 # drawing to glAccum might be good
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73 layerTimes = []
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74 layers = 0
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75 for filename, mag in self.levels.items():
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76 t = time.time()
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77 layers += self.drawWithAlpha(self.image[filename],
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78 self.imageWidth, self.imageHeight, mag)
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79 layerTimes.append(time.time() - t)
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80
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81 dispatcher.send("status", key="visibleLayers", value=str(layers))
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82
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83 dispatcher.send("status", key="redraw",
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84 value="%.1fms" % ((time.time() - start) * 1000))
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85
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86
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87 def drawWithAlpha(self, imgString, w, h, alpha):
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88 """without opengl extensions. Returns number of layers drawn"""
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89 if alpha == 0:
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90 return 0
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91 t = time.time()
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92 ar = num.reshape(num.fromstring(imgString, dtype='uint8'),
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93 (w * h, 4))
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94 #print " tonum", time.time() - t
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95 if alpha != 1:
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96 ar[:,3] *= alpha
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97
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98 #print " scl", time.time() - t
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99
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100 # this might be a good way to scale the color channels too,
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101 # but the blend might take two steps. Anyway,
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102 # GL_CONSTANT_COLOR seems not to work, so i'm not exploring
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103 # this right now.
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104 #glBlendFunc(GL_CONSTANT_COLOR, GL_ONE)
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105 #glBlendColor(.8, .5, .5, .5)
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106
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107 glPixelZoom(self.width() / w, self.height() / h)
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108 glDrawPixels(w, h,
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109 GL_RGBA, GL_UNSIGNED_BYTE, ar.tostring())
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110 #print " draw", time.time() - t
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111 return 1
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112
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113 def newLevels(self, event=None, levels=None):
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114 if levels != self.levels:
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115 self.levels = levels
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116 self.updateGL()
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117
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118
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119 ## def mousePressEvent(self, event):
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120 ## self.lastPos = QtCore.QPoint(event.pos())
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121
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122 ## def mouseMoveEvent(self, event):
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123 ## dx = event.x() - self.lastPos.x()
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124 ## dy = event.y() - self.lastPos.y()
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125 ## rot = (.25*dy, .25*dx, 0)
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126 ## if event.buttons() & QtCore.Qt.LeftButton:
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127 ## self.emit(QtCore.SIGNAL("rotationChanged"), rot)
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128 ## elif event.buttons() & QtCore.Qt.MidButton:
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129 ## self.emit(QtCore.SIGNAL("camDistChanged"), .01*dy)
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130
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131 ## self.lastPos = QtCore.QPoint(event.pos())
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132
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133 def main():
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134 root = tk.Frame()
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135 root.pack(expand=True, fill='both')
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136 QuitButton = tk.Button(root, {'text':'Quit'})
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137 QuitButton.bind('<ButtonRelease-1>', sys.exit)
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138 QuitButton.pack()
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139
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140 filenames=['skyline/bg.png',
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141 'skyline/cyc-lo-red.png',
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142 'skyline/cyc-lo-grn.png',
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143 ]
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144
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145 scales = {} # filename : scale
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146 for f in filenames:
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147 scales[f] = tk.Scale(
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148 root, label=f, from_=0, to=1, res=.05, orient='horiz',
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149 command=lambda *args: ogl.newLevels(
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150 levels=dict([(f, s.get()) for f,s in scales.items()])))
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151 scales[f].pack()
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152 ogl = Surface(root, filenames)
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153 ogl.pack(side='top', expand=True, fill='both')
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154
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155 ogl.mainloop()
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156
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157 if __name__ == '__main__':
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158 main()
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159
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160 demo = Surface