ComputerGraphics/2-2.py at main · hkkim2021/ComputerGraphics · GitHub

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import glfw
from OpenGL.GL import *
import numpy as np

def render(T):
	glClear(GL_COLOR_BUFFER_BIT)
	glLoadIdentity()

	#draw coordinate
	glBegin(GL_LINES)
	glColor3ub(255,0,0)
	glVertex2fv(np.array([0.,0.]))
	glVertex2fv(np.array([1.,0.]))
	glColor3ub(0,255,0)
	glVertex2fv(np.array([0.,0.]))
	glVertex2fv(np.array([0.,1.]))
	glEnd()

	#draw triangle
	glBegin(GL_TRIANGLES)
	glColor3ub(255,255,255)
	glVertex2fv( (T @ np.array([.0,.5,1.])) [:-1] )
	glVertex2fv( (T @ np.array([.0,.0,1.])) [:-1] )
	glVertex2fv( (T @ np.array([.5,.0,1.])) [:-1] )
	glEnd()

def main():
	if not glfw.init():
		return
	window = glfw.create_window(480,480, "2021005923-2-2",None,None)

	if not window:
		glfw.terminate()
		return

	glfw.make_context_current(window)

	while not glfw.window_should_close(window):

		glfw.poll_events()

		t = glfw.get_time()

		R=np.array([[np.cos(t), -np.sin(t), 0.0],
			    [np.sin(t), np.cos(t), 0.0],
			    [0.0,0.0,1.0]])

		M=np.array([[1.,0.,.5],
			   [0.,1.,.1],
			   [0.,0.,1.]])

		render(R@M);

		glfw.swap_buffers(window)

	glfw.terminate()


if __name__ =="__main__":
	main()