lab1_example.py

import glfw
from OpenGL.GL import *

delta = 0.1
angle = 0.0
posx = 0.0
posy = 0.0
size = 0.0

def main():
        if not glfw.init():
                return
        window = glfw.create_window(640, 640, "Lab1", None, None)
        if not window:
                glfw.terminate()
                return
        glfw.make_context_current(window)
        glfw.set_key_callback(window, key_callback)
        glfw.set_scroll_callback(window, scroll_callback)
        while not glfw.window_should_close(window):
                display(window)
        glfw.destroy_window(window)
        glfw.terminate()


def display(window):
        global angle
        glClear(GL_COLOR_BUFFER_BIT)
        glLoadIdentity()
        glClearColor(0.5, 0.25, 1.0, 1.0)
        glPushMatrix()
        glRotatef(angle, 0, 0, 1)
        glBegin(GL_POLYGON)
        glColor3f(0.1,0.1,0.1)
        glVertex2f(posx + size + 0.5,posy + size + 0.5)
        glColor3f(0.35,0.0,0.89)
        glVertex2f(posx - size + -0.5,posy + size + 0.5)
        glColor3f(0.0,1.0,1.0)
        glVertex2f(posx - size + -0.5,posy - size + -0.5)
        glColor3f(0.78,0.23,1.0)
        glVertex2f(posx + size + 0.5,posy - size + -0.5)
        glEnd()
        glPopMatrix()
        angle += delta
        glfw.swap_buffers(window)

        glfw.poll_events()



def key_callback(window, key, scancode, action, mods):
        global delta
        global angle
        if action == glfw.PRESS:
                if key == glfw.KEY_RIGHT:
                        delta = -3
                if key == 263: # glfw.KEY_LEFT
                 delta = 3


def scroll_callback(window, xoffset, yoffset):
        global size
        if (xoffset > 0):
                size -= yoffset/10
        else:
                size += yoffset/10

main()