forked from s444420/AL-2020
130 lines
3.3 KiB
Python
130 lines
3.3 KiB
Python
#!/usr/bin/env python
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"""Draw a cube on the screen. every frame we orbit
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the camera around by a small amount and it appears
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the object is spinning. note i've setup some simple
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data structures here to represent a multicolored cube,
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we then go through a semi-unoptimized loop to draw
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the cube points onto the screen. opengl does all the
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hard work for us. :]
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"""
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import pygame
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from pygame.locals import *
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try:
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from OpenGL.GL import *
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from OpenGL.GLU import *
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except ImportError:
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print ('The GLCUBE example requires PyOpenGL')
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raise SystemExit
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#some simple data for a colored cube
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#here we have the 3D point position and color
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#for each corner. then we have a list of indices
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#that describe each face, and a list of indieces
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#that describes each edge
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CUBE_POINTS = (
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(0.5, -0.5, -0.5), (0.5, 0.5, -0.5),
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(-0.5, 0.5, -0.5), (-0.5, -0.5, -0.5),
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(0.5, -0.5, 0.5), (0.5, 0.5, 0.5),
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(-0.5, -0.5, 0.5), (-0.5, 0.5, 0.5)
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)
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#colors are 0-1 floating values
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CUBE_COLORS = (
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(1, 0, 0), (1, 1, 0), (0, 1, 0), (0, 0, 0),
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(1, 0, 1), (1, 1, 1), (0, 0, 1), (0, 1, 1)
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)
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CUBE_QUAD_VERTS = (
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(0, 1, 2, 3), (3, 2, 7, 6), (6, 7, 5, 4),
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(4, 5, 1, 0), (1, 5, 7, 2), (4, 0, 3, 6)
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)
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CUBE_EDGES = (
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(0,1), (0,3), (0,4), (2,1), (2,3), (2,7),
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(6,3), (6,4), (6,7), (5,1), (5,4), (5,7),
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)
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def drawcube():
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"draw the cube"
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allpoints = list(zip(CUBE_POINTS, CUBE_COLORS))
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glBegin(GL_QUADS)
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for face in CUBE_QUAD_VERTS:
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for vert in face:
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pos, color = allpoints[vert]
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glColor3fv(color)
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glVertex3fv(pos)
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glEnd()
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glColor3f(1.0, 1.0, 1.0)
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glBegin(GL_LINES)
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for line in CUBE_EDGES:
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for vert in line:
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pos, color = allpoints[vert]
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glVertex3fv(pos)
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glEnd()
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def init_gl_stuff():
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glEnable(GL_DEPTH_TEST) #use our zbuffer
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#setup the camera
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glMatrixMode(GL_PROJECTION)
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glLoadIdentity()
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gluPerspective(45.0,640/480.0,0.1,100.0) #setup lens
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glTranslatef(0.0, 0.0, -3.0) #move back
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glRotatef(25, 1, 0, 0) #orbit higher
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def main():
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"run the demo"
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#initialize pygame and setup an opengl display
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pygame.init()
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fullscreen = True
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pygame.display.set_mode((640,480), OPENGL|DOUBLEBUF|FULLSCREEN)
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init_gl_stuff()
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going = True
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while going:
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#check for quit'n events
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events = pygame.event.get()
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for event in events:
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if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
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going = False
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elif event.type == KEYDOWN:
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if event.key == pygame.K_f:
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if not fullscreen:
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print("Changing to FULLSCREEN")
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pygame.display.set_mode((640, 480), OPENGL | DOUBLEBUF | FULLSCREEN)
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else:
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print("Changing to windowed mode")
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pygame.display.set_mode((640, 480), OPENGL | DOUBLEBUF)
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fullscreen = not fullscreen
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init_gl_stuff()
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#clear screen and move camera
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glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
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#orbit camera around by 1 degree
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glRotatef(1, 0, 1, 0)
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drawcube()
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pygame.display.flip()
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pygame.time.wait(10)
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if __name__ == '__main__': main()
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