1996-11-27 19:52:01 +00:00
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#! /usr/bin/env python
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1992-03-30 13:18:37 +00:00
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# backface
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#
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# draw a cube that can run with backface() turned on or off.
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# cube is moved when LEFTMOUSE is pressed and mouse itself is moved.
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from gl import *
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from DEVICE import *
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from GL import *
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CUBE_SIZE = 200.0
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CUBE_OBJ = 1
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def main () :
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#
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x = 0
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y = 0
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moveit = 0
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#
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initialize()
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#
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while (1) :
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#
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while (qtest()) :
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dev, val = qread()
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#
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if dev == ESCKEY :
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backface(0)
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return
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#
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elif dev == REDRAW :
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reshapeviewport()
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drawcube(x,y)
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#
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elif dev == LEFTMOUSE :
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#
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# LEFTMOUSE down
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moveit = val
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#
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elif dev == BKEY :
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backface(1)
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drawcube(x,y)
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#
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elif dev == FKEY :
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backface(0)
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drawcube(x,y)
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#
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if moveit :
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x = getvaluator(MOUSEX)
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y = getvaluator(MOUSEY)
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drawcube(x,y)
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def initialize () :
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foreground ()
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keepaspect (1, 1)
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gid = winopen('backface')
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winset(gid)
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winconstraints()
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#
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doublebuffer()
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gconfig()
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shademodel(FLAT)
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#
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ortho(-1024.0, 1024.0, -1024.0, 1024.0, -1024.0, 1024.0)
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#
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qdevice(ESCKEY)
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qdevice(REDRAW)
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qdevice(LEFTMOUSE)
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qdevice(BKEY)
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qdevice(FKEY)
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qenter(REDRAW,gid)
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#
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backface(1)
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#
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# define a cube
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def cube () :
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#
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# front face
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pushmatrix()
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translate(0.0,0.0,CUBE_SIZE)
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color(RED)
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rectf(-CUBE_SIZE,-CUBE_SIZE,CUBE_SIZE,CUBE_SIZE)
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popmatrix()
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#
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# right face
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pushmatrix()
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translate(CUBE_SIZE, 0.0, 0.0)
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rotate(900, 'y')
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color(GREEN)
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rectf(-CUBE_SIZE,-CUBE_SIZE,CUBE_SIZE,CUBE_SIZE)
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popmatrix()
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#
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# back face
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pushmatrix()
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translate(0.0, 0.0, -CUBE_SIZE)
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rotate(1800, 'y')
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color(BLUE)
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rectf(-CUBE_SIZE,-CUBE_SIZE,CUBE_SIZE,CUBE_SIZE)
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popmatrix()
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#
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# left face
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pushmatrix()
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translate(-CUBE_SIZE, 0.0, 0.0)
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rotate(-900, 'y')
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color(CYAN)
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rectf(-CUBE_SIZE,-CUBE_SIZE,CUBE_SIZE,CUBE_SIZE)
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popmatrix()
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#
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# top face
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pushmatrix()
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translate(0.0, CUBE_SIZE, 0.0)
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rotate(-900, 'x')
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color(MAGENTA)
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rectf(-CUBE_SIZE,-CUBE_SIZE,CUBE_SIZE,CUBE_SIZE)
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popmatrix()
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#
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# bottom face
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pushmatrix()
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translate(0.0, -CUBE_SIZE, 0.0)
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rotate(900, 'x')
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color(YELLOW)
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rectf(-CUBE_SIZE,-CUBE_SIZE,CUBE_SIZE,CUBE_SIZE)
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popmatrix()
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def drawcube(x,y) :
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#
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pushmatrix()
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rotate(2*x, 'x')
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rotate(2*y, 'y')
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color(BLACK)
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clear()
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cube()
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popmatrix()
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swapbuffers()
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main ()
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