Python 언어로 작성하여 실행해 본 OpenGL 예제: Redbook 의 Teapots

아래의 파이썬용 소스를 실행시키자면 PyOpenGL 을 먼저 설치해야 한다.

소스의 구조는 C 언어 용으로 작성된 teapots,c 의 것과 거의 유사하다.

 

# Filename: teapots.py
#
# See Wiki: http://www.de-brauwer.be/wiki/wikka.php?wakka=PyOpenGL
# See Source: http://www.de-brauwer.be/wiki/wikka.php?wakka=PyOpenGLHelloWorld
# See C Source: http://www.glprogramming.com/red/chapter03.html

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

teapotList = 0

def initFun():
    global teapotList

    ambient = [ 0.0, 0.0, 0.0, 1.0 ]
    diffuse = [ 1.0, 1.0, 1.0, 1.0 ]
    specular = [ 1.0, 1.0, 1.0, 1.0 ]
    position = [ 0.0, 3.0, 3.0, 0.0 ]

    lmodel_ambient = [ 0.2, 0.2, 0.2, 1.0 ]
    local_view = [ 0.0 ]

    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient)
    glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse)
    glLightfv(GL_LIGHT0, GL_POSITION, position)
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient)
    glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view)

    glFrontFace(GL_CW)
    glEnable(GL_LIGHTING)
    glEnable(GL_LIGHT0)
    glEnable(GL_AUTO_NORMAL)
    glEnable(GL_NORMALIZE)
    glEnable(GL_DEPTH_TEST)
    # be efficient--make teapot display list
    teapotList = glGenLists(1)
    glNewList (teapotList, GL_COMPILE)
    glutSolidTeapot(1.0)
    glEndList ()

# Move object into position.  Use 3rd through 12th
# parameters to specify the material property.  Draw a teapot.
def renderTeapot(x, y, ambr, ambg, ambb, difr, difg, difb, specr, specg, specb, shine):
    global teapotList

    mat = [ 0.0, 0.0, 0.0, 0.0 ]

    glPushMatrix()
    glTranslatef(x, y, 0.0)
    mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0
    glMaterialfv(GL_FRONT, GL_AMBIENT, mat)
    mat[0] = difr; mat[1] = difg; mat[2] = difb
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat)
    mat[0] = specr; mat[1] = specg; mat[2] = specb
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat)
    glMaterialf(GL_FRONT, GL_SHININESS, shine * 128.0)
    glCallList(teapotList)
    glPopMatrix()

#  First column:  emerald, jade, obsidian, pearl, ruby, turquoise
#  2nd column:  brass, bronze, chrome, copper, gold, silver
#  3rd column:  black, cyan, green, red, white, yellow plastic
#  4th column:  black, cyan, green, red, white, yellow rubber
def displayFun():
    global teapotList

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    renderTeapot(2.0, 17.0, 0.0215, 0.1745, 0.0215, 0.07568, 0.61424, 0.07568, 0.633, 0.727811, 0.633, 0.6)
    renderTeapot(2.0, 14.0, 0.135, 0.2225, 0.1575, 0.54, 0.89, 0.63, 0.316228, 0.316228, 0.316228, 0.1)
    renderTeapot(2.0, 11.0, 0.05375, 0.05, 0.06625, 0.18275, 0.17, 0.22525, 0.332741, 0.328634, 0.346435, 0.3)
    renderTeapot(2.0, 8.0, 0.25, 0.20725, 0.20725, 1, 0.829, 0.829, 0.296648, 0.296648, 0.296648, 0.088)
    renderTeapot(2.0, 5.0, 0.1745, 0.01175, 0.01175, 0.61424, 0.04136, 0.04136, 0.727811, 0.626959, 0.626959, 0.6)
    renderTeapot(2.0, 2.0, 0.1, 0.18725, 0.1745, 0.396, 0.74151, 0.69102, 0.297254, 0.30829, 0.306678, 0.1)
    renderTeapot(6.0, 17.0, 0.329412, 0.223529, 0.027451, 0.780392, 0.568627, 0.113725, 0.992157, 0.941176, 0.807843, 0.21794872)
    renderTeapot(6.0, 14.0, 0.2125, 0.1275, 0.054, 0.714, 0.4284, 0.18144, 0.393548, 0.271906, 0.166721, 0.2)
    renderTeapot(6.0, 11.0, 0.25, 0.25, 0.25, 0.4, 0.4, 0.4, 0.774597, 0.774597, 0.774597, 0.6)
    renderTeapot(6.0, 8.0, 0.19125, 0.0735, 0.0225, 0.7038, 0.27048, 0.0828, 0.256777, 0.137622, 0.086014, 0.1)
    renderTeapot(6.0, 5.0, 0.24725, 0.1995, 0.0745, 0.75164, 0.60648, 0.22648, 0.628281, 0.555802, 0.366065, 0.4)
    renderTeapot(6.0, 2.0, 0.19225, 0.19225, 0.19225, 0.50754, 0.50754, 0.50754, 0.508273, 0.508273, 0.508273, 0.4)
    renderTeapot(10.0, 17.0, 0.0, 0.0, 0.0, 0.01, 0.01, 0.01, 0.50, 0.50, 0.50, 0.25)
    renderTeapot(10.0, 14.0, 0.0, 0.1, 0.06, 0.0, 0.50980392, 0.50980392, 0.50196078, 0.50196078, 0.50196078, 0.25)
    renderTeapot(10.0, 11.0, 0.0, 0.0, 0.0, 0.1, 0.35, 0.1, 0.45, 0.55, 0.45, 0.25)
    renderTeapot(10.0, 8.0, 0.0, 0.0, 0.0, 0.5, 0.0, 0.0, 0.7, 0.6, 0.6, 0.25)
    renderTeapot(10.0, 5.0, 0.0, 0.0, 0.0, 0.55, 0.55, 0.55, 0.70, 0.70, 0.70, 0.25)
    renderTeapot(10.0, 2.0, 0.0, 0.0, 0.0, 0.5, 0.5, 0.0, 0.60, 0.60, 0.50, 0.25)
    renderTeapot(14.0, 17.0, 0.02, 0.02, 0.02, 0.01, 0.01, 0.01, 0.4, 0.4, 0.4, 0.078125)
    renderTeapot(14.0, 14.0, 0.0, 0.05, 0.05, 0.4, 0.5, 0.5, 0.04, 0.7, 0.7, 0.078125)
    renderTeapot(14.0, 11.0, 0.0, 0.05, 0.0, 0.4, 0.5, 0.4, 0.04, 0.7, 0.04, 0.078125)
    renderTeapot(14.0, 8.0, 0.05, 0.0, 0.0, 0.5, 0.4, 0.4, 0.7, 0.04, 0.04, 0.078125)
    renderTeapot(14.0, 5.0, 0.05, 0.05, 0.05, 0.5, 0.5, 0.5, 0.7, 0.7, 0.7, 0.078125)
    renderTeapot(14.0, 2.0, 0.05, 0.05, 0.0, 0.5, 0.5, 0.4, 0.7, 0.7, 0.04, 0.078125)
    glFlush()

def reshapeFun(w, h):
    glViewport(0, 0, w, h)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    if w <= h:
        glOrtho(0.0, 16.0, 0.0, 16.0*h/w, -10.0, 10.0)
    else:
        glOrtho(0.0, 16.0*w/h, 0.0, 16.0, -10.0, 10.0)
    glMatrixMode(GL_MODELVIEW)

def keyboardFun(key, x, y):
    if key == chr(27):
        sys.exit(0)

if __name__ == '__main__':
    glutInit()
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH)
    glutInitWindowSize(500, 600)
    glutInitWindowPosition(50,50)
    glutCreateWindow("Teapots")
    initFun()
    glutReshapeFunc(reshapeFun)
    glutDisplayFunc(displayFun)
    glutKeyboardFunc (keyboardFun)
    glutMainLoop()

 

실행하기: python teapots.py

실행 결과: