# ----------------------------------------------------------------------------- # Python & OpenGL for Scientific Visualization # www.labri.fr/perso/nrougier/python+opengl # Copyright (c) 2017, Nicolas P. Rougier # Distributed under the 2-Clause BSD License. # ----------------------------------------------------------------------------- from glumpy import app, gloo, gl vertex = """ attribute vec2 position; attribute vec4 color; varying vec4 v_color; void main(){ gl_Position = vec4(position, 0.0, 1.0); v_color = color; } """ fragment = """ varying vec4 v_color; void main() { gl_FragColor = v_color; } """ # Create a window with a valid GL context window = app.Window() # Build the program and corresponding buffers (with 4 vertices) quad = gloo.Program(vertex, fragment, count=4) # Upload data into GPU quad['position'] = (-1,+1), (+1,+1), (-1,-1), (+1,-1) quad['color'] = (1,1,0,1), (1,0,0,1), (0,0,1,1), (0,1,0,1) # Tell glumpy what needs to be done at each redraw @window.event def on_draw(dt): window.clear() quad.draw(gl.GL_TRIANGLE_STRIP) # Run the app app.run()