46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
# Testing the BGL module
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import Blender
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from Blender.BGL import *
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from Blender import Draw
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R = G = B = 0
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A = 1
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instructions = "Hold mouse buttons to change the background color."
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quitting = " Press ESC or q to quit."
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def show_win():
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glClearColor(R,G,B,A) # define color used to clear buffers
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glClear(GL_COLOR_BUFFER_BIT) # use it to clear the color buffer
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glColor3f(1,1,1) # change default color
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glRasterPos2i(50,100) # move cursor to x = 50, y = 100
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Draw.Text("Testing BGL + Draw") # draw this text there
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glRasterPos2i(350,20) # move cursor again
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Draw.Text(instructions + quitting) # draw another msg
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glBegin(GL_LINE_LOOP) # begin a vertex-data list
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glVertex2i(46,92)
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glVertex2i(120,92)
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glVertex2i(120,115)
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glVertex2i(46,115)
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glEnd() # close this list
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glColor3f(0.35,0.18,0.92) # change default color again
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glBegin(GL_POLYGON) # another list, for a polygon
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glVertex2i(315, 292)
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glVertex2i(412, 200)
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glVertex2i(264, 256)
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glEnd()
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Draw.Redraw(1) # make changes visible.
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def ev(evt, val): # this is a callback for Draw.Register()
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global R,G,B,A # it handles input events
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if evt == Draw.ESCKEY or evt == Draw.QKEY:
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Draw.Exit() # this quits the script
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elif evt == Draw.LEFTMOUSE: R = 1 - R
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elif evt == Draw.MIDDLEMOUSE: G = 1 - G
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elif evt == Draw.RIGHTMOUSE: B = 1 - B
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else:
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Draw.Register(show_win, ev, None)
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Draw.Register(show_win, ev, None) # start the main loop
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