1996-11-27 15:52:01 -04:00
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#! /usr/bin/env python
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1992-03-30 09:18:37 -04:00
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# zrgb (Requires Z buffer.)
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#
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# This program demostrates zbuffering 3 intersecting RGB polygons while
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# in doublebuffer mode where, movement of the mouse with the LEFTMOUSE
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# button depressed will, rotate the 3 polygons. This is done by compound
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# rotations allowing continuous screen-oriented rotations.
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#
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# Press the "Esc" key to exit.
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from gl import *
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from GL import *
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from DEVICE import *
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idmat=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]
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def main() :
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#
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# old and new mouse position
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#
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#
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mode = 0
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omx = 0
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mx = 0
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omy = 0
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my = 0
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#
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objmat=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]
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#
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initialize ()
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#
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draw_scene (objmat)
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#
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while (1) :
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#
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dev, val = qread()
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#
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if dev == ESCKEY :
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if val :
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break
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# exit when key is going up, not down
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# this avoids the scenario where a window
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# underneath this program's window
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# would otherwise "eat up" the up-
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# event of the Esc key being released
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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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draw_scene(objmat)
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#
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elif dev == LEFTMOUSE:
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omx = mx
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omy = my
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if val :
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mode = 1
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else :
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mode = 0
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elif dev == MOUSEX :
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omx = mx
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mx = val
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#print omx, mx
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objmat = update_scene(objmat,mx,my,omx,omy,mode)
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#
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elif dev == MOUSEY :
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omy = my
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my = val
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#print omy, my
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objmat = update_scene(objmat,mx,my,omx,omy,mode)
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#
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def initialize () :
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#
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foreground ()
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keepaspect(5, 4)
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w = winopen('Zbuffered RGB')
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#
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doublebuffer()
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RGBmode()
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gconfig()
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zbuffer(1)
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lsetdepth(0x0, 0x7FFFFF)
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#
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qdevice(ESCKEY)
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qdevice(LEFTMOUSE)
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qdevice(MOUSEX)
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qdevice(MOUSEY)
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def update_scene (mat, mx, my, omx, omy, mode) :
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#
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if mode == 1 :
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mat = orient(mat, mx, my, omx, omy)
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draw_scene(mat)
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return mat
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def orient (mat, mx, my, omx, omy) :
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#
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#
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pushmatrix()
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loadmatrix(idmat)
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#
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if mx - omx : rot (float (mx - omx), 'y')
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if omy - my : rot (float (omy - my), 'x')
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#
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multmatrix(mat)
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mat = getmatrix()
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#
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popmatrix()
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#
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return mat
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def draw_scene (mat) :
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RGBcolor(40, 100, 200)
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clear()
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zclear()
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#
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perspective(400, 1.25, 30.0, 60.0)
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translate(0.0, 0.0, -40.0)
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multmatrix(mat)
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#
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# skews original view to show all polygons
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#
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rotate(-580, 'y')
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draw_polys()
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#
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swapbuffers()
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polygon1 = [(-10.0,-10.0,0.0),(10.0,-10.0,0.0),(-10.0,10.0,0.0)]
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polygon2 = [(0.0,-10.0,-10.0),(0.0,-10.0,10.0),(0.0,5.0,-10.0)]
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polygon3 = [(-10.0,6.0,4.0),(-10.0,3.0,4.0),(4.0,-9.0,-10.0),(4.0,-6.0,-10.0)]
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def draw_polys():
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bgnpolygon()
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cpack(0x0)
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v3f(polygon1[0])
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cpack(0x007F7F7F)
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v3f(polygon1[1])
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cpack(0x00FFFFFF)
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v3f(polygon1[2])
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endpolygon()
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#
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bgnpolygon()
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cpack(0x0000FFFF)
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v3f(polygon2[0])
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cpack(0x007FFF00)
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v3f(polygon2[1])
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cpack(0x00FF0000)
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v3f(polygon2[2])
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endpolygon()
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#
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bgnpolygon()
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cpack(0x0000FFFF)
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v3f(polygon3[0])
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cpack(0x00FF00FF)
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v3f(polygon3[1])
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cpack(0x00FF0000)
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v3f(polygon3[2])
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cpack(0x00FF00FF)
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v3f(polygon3[3])
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endpolygon()
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main ()
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