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1 # |
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2 # gles_demo.py |
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3 # |
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4 # Copyright (c) 2006-2007 Nokia Corporation |
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5 # |
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6 # Licensed under the Apache License, Version 2.0 (the "License"); |
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7 # you may not use this file except in compliance with the License. |
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8 # You may obtain a copy of the License at |
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9 # |
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10 # http://www.apache.org/licenses/LICENSE-2.0 |
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11 # |
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12 # Unless required by applicable law or agreed to in writing, software |
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13 # distributed under the License is distributed on an "AS IS" BASIS, |
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14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 # See the License for the specific language governing permissions and |
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16 # limitations under the License. |
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17 # |
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18 |
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19 import appuifw, sys, e32, time |
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20 from glcanvas import * |
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21 from gles import * |
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22 from key_codes import * |
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23 |
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24 class GLESDemo: |
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25 varray = array(GL_BYTE, 3, [ |
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26 -1,1,1, 1,1,1, 1,-1,1, -1,-1,1, |
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27 -1,1,-1, 1,1,-1, 1,-1,-1, -1,-1,-1 |
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28 ]) |
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29 |
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30 indices = array(GL_UNSIGNED_BYTE, 3, [ |
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31 1,0,3, 1,3,2, 2,6,5, 2,5,1, 7,4,5, 7,5,6, |
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32 0,4,7, 0,7,3, 5,4,0, 5,0,1, 3,7,6, 3,6,2 |
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33 ]) |
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34 |
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35 colors = array(GL_UNSIGNED_BYTE, 4, [ |
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36 0,255,0,255, 0,0,255,255, 0,255,0,255, 255,0,0,255, |
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37 0,0,255,255, 255,0,0,255, 0,0,255,255, 0,255,0,255 |
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38 ]) |
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39 |
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40 texcoords = array(GL_BYTE, 2, [ |
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41 0,0, 0,1, 1,0, 1,1, 0,0, 0,1, 1,0, 1,1 |
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42 ] ) |
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43 |
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44 # initialize texture array (just used for passing texture data to glTexImage2D or glTexSubImage2D...) |
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45 texture = array(GL_UNSIGNED_BYTE, 4, [ |
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46 255,0,0,255, 255,0,0,255, 0,255,0,255, 0,255,0,255, |
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47 255,0,0,255, 255,0,0,255, 0,255,0,255, 0,255,0,255, |
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48 0,0,255,255, 0,0,255,255, 0,255,255,255, 0,255,255,255, |
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49 0,0,255,255, 0,0,255,255, 0,255,255,255, 0,255,255,255, |
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50 ] ) |
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51 |
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52 def __init__(self): |
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53 """Initializes OpenGL ES, sets the vertex and color arrays and pointers, |
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54 and selects the shading mode.""" |
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55 # It's best to set these before creating the GL Canvas |
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56 self.iFrame=0 |
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57 self.exitflag = False |
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58 |
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59 self.render=0 |
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60 |
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61 self.old_body=appuifw.app.body |
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62 try: |
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63 self.canvas=GLCanvas(redraw_callback=self.redraw) |
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64 appuifw.app.body=self.canvas |
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65 except Exception,e: |
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66 appuifw.note(u"Exception: %s" % (e)) |
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67 self.set_exit() |
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68 return |
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69 |
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70 appuifw.app.menu = [ |
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71 (u"Exit", self.set_exit) |
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72 ] |
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73 |
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74 self.initgl() |
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75 self.render=1 |
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76 |
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77 def initgl(self): |
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78 # Initialize texture stuff |
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79 self.texhandle = glGenTextures( 1 ) |
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80 glBindTexture(GL_TEXTURE_2D, self.texhandle) |
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81 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 4, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE, self.texture) |
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82 glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE) |
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83 |
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84 # Disable mip mapping |
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85 glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ) |
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86 glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) |
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87 |
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88 # Initialize array pointers |
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89 glVertexPointerb(self.varray) |
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90 |
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91 glColorPointerub(self.colors) |
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92 glTexCoordPointerb(self.texcoords) |
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93 glEnableClientState(GL_VERTEX_ARRAY) |
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94 glEnableClientState(GL_COLOR_ARRAY) |
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95 glEnableClientState(GL_TEXTURE_COORD_ARRAY) |
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96 |
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97 # Set up state |
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98 glEnable(GL_CULL_FACE) |
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99 glEnable(GL_TEXTURE_2D) |
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100 glDisable(GL_DEPTH_TEST) |
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101 glClearColorx(0,0,0,65536) |
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102 glClear(GL_COLOR_BUFFER_BIT) |
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103 |
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104 glViewport(0, 0, self.canvas.size[0], self.canvas.size[1]) |
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105 glMatrixMode( GL_PROJECTION ) |
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106 glFrustumf( -1.0, 1.0, -1.0, 1.0, 3.0, 1000.0 ) |
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107 glMatrixMode( GL_MODELVIEW ) |
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108 glLoadIdentity() |
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109 glTranslatef(0,0,-100.0) |
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110 glScalef(15,15,15) |
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111 |
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112 glLoadIdentity() |
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113 glTranslatef(0,0,-100.0) |
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114 glScalef(15,15,15) |
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115 |
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116 def redraw(self,frame=None): |
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117 """Draws and animates the objects. |
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118 The frame number determines the amount of rotation.""" |
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119 if self.render != 1: |
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120 return |
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121 self.iFrame += 1 |
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122 |
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123 glClear(GL_COLOR_BUFFER_BIT) |
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124 |
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125 glPushMatrix() |
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126 glTranslatef(-2,-2,-2) |
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127 glRotatef(self.iFrame/1.1, 5,2,3) |
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128 glMatrixMode( GL_TEXTURE ) |
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129 glLoadIdentity() |
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130 glRotatef(self.iFrame/0.7, 0.5, 0.7, 0.2) |
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131 glScalef(10,10,10) |
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132 glMatrixMode( GL_MODELVIEW ) |
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133 glDrawElementsub(GL_TRIANGLES, self.indices) |
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134 glPopMatrix() |
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135 |
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136 glPushMatrix() |
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137 glTranslatef(2,3,-3) |
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138 glRotatef(self.iFrame/1.8, 3,2,3) |
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139 glMatrixMode( GL_TEXTURE ) |
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140 glLoadIdentity() |
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141 glRotatef(self.iFrame/0.7, 0.1, 0.2, 0.3) |
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142 glScalef(10,10,10) |
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143 glMatrixMode( GL_MODELVIEW ) |
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144 glDrawElementsub(GL_TRIANGLES, self.indices) |
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145 glPopMatrix() |
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146 |
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147 glPushMatrix() |
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148 glRotatef(self.iFrame/1.5, 1,2,3) |
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149 glMatrixMode( GL_TEXTURE ) |
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150 glLoadIdentity() |
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151 glRotatef(self.iFrame/0.5, 0.5, 0.3, 0.2) |
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152 glScalef(10,10,10) |
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153 glMatrixMode( GL_MODELVIEW ) |
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154 glDrawElementsub(GL_TRIANGLES, self.indices) |
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155 glPopMatrix() |
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156 |
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157 def close_canvas(self): # break reference cycles |
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158 # Uninitializing OpenGL calls should be made before the GLCanvas is deleted |
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159 glDeleteTextures([self.texhandle]) |
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160 appuifw.app.body=self.old_body |
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161 self.canvas=None |
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162 |
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163 appuifw.app.exit_key_handler=None |
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164 |
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165 def set_exit(self): |
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166 self.exitflag = True |
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167 self.render = 0 |
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168 |
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169 def run(self): |
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170 appuifw.app.exit_key_handler=self.set_exit |
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171 while not self.exitflag: |
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172 self.canvas.drawNow() |
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173 e32.ao_sleep(0.0001) |
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174 self.close_canvas() |
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175 |
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176 appuifw.app.screen='full' |
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177 try: |
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178 app=GLESDemo() |
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179 except Exception,e: |
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180 appuifw.note(u"Cannot start: %s" % (e)) |
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181 else: |
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182 app.run() |
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183 del app |