CG-IP_Lab/Scaling.py at master · 101rror/CG-IP_Lab · GitHub

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import OpenGL
from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *

def draw_axes():
    glColor3f(1.0, 1.0, 1.0)  # White color for axes
    glBegin(GL_LINES)
    glVertex2f(-10, 0)  # x-axis
    glVertex2f(10, 0)
    glVertex2f(0, -10)  # y-axis
    glVertex2f(0, 10)
    glEnd()

def basic_triangle(x1, y1, x2, y2, x3, y3):
    glColor3f(1.0, 0.0, 0.0)  # Red color for points
    glPointSize(5)
    glBegin(GL_LINES)
    glVertex2f(x1, y1)  # (5, 4)
    glVertex2f(x2, y2)

    glVertex2f(x2, y2)
    glVertex2f(x3, y3)

    glVertex2f(x3, y3)
    glVertex2f(x1, y1)
    glEnd()

def scaled_triangle(x1, y1, x2, y2, x3, y3, scale):

    x1 = x1*scale
    y1 = y1*scale

    x2 = x2*scale
    y2 = y2*scale

    x3 = x3*scale
    y3 = y3*scale

    glColor3f(0.0, 1.0, 0.0)  # Green color for points
    glPointSize(5)
    glBegin(GL_LINES)
    glVertex2f(x1, y1)  # (5, 4)
    glVertex2f(x2, y2)
    glVertex2f(x2, y2)
    glVertex2f(x3, y3)
    glVertex2f(x3, y3)
    glVertex2f(x1, y1)
    glEnd()

def display():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()

    draw_axes()

    basic_triangle(1, 1, 3, 3, 5, 2)
    scaled_triangle(1, 1, 3, 3, 5, 2, 2)

    glFlush()
    glutSwapBuffers()

def reshape(width, height):
    glViewport(0, 0, width, height)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    glOrtho(-10, 10, -10, 10, -1, 1)
    glMatrixMode(GL_MODELVIEW)


glutInit()  # Initialize GLUT
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH)
glutInitWindowSize(500, 500)
glutCreateWindow(b"Plotting with PyOpenGL")
glEnable(GL_DEPTH_TEST)
glClearColor(0.0, 0.0, 0.0, 1.0)
glutDisplayFunc(display)
glutReshapeFunc(reshape)
glutMainLoop()