python+OpenGL

python+OpenGL

两个pyOpenGL的小例子

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

global size
size=0.5
#键盘交互有点问题
def keyboard(input="a",x=0,y=0):
    global size
    if(input=='w'):
        size+=1.0
    if(input=='s'):
        size-=1.0
    if(size<0.1):
        size=0.1

    print(input)
    print(size)

    glutPostRedisplay()

#通过指定参数缺省值，来设置参数类型
def myMouse(button=0,state=0,x=0,y=0):
    if(state==GLUT_DOWN):
        print(x,y)

def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)#绘制当前帧时，先擦黑板
    glRotatef(1, 0, 1, 0)
    glutWireTeapot(size)
    glFlush()#它是处理OpenGL的渲染流水线，让所有排队中的命令得到执行。

glutInit()#初始化
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)#单缓冲
glutInitWindowPosition(0,0)#设置窗口位置
glutInitWindowSize(400, 400)#设置窗口大小
glutCreateWindow("teaPot")#出现窗口，质变

#回调函数
glutDisplayFunc(drawFunc)#里面是实际的绘图操作
#glutIdleFunc(drawFunc)#可以让OpenGL在闲暇之余，调用一下注册的函数，产生动画
glutKeyboardFunc(keyboard)#键盘交互
glutMouseFunc(myMouse)#鼠标交互

glutMainLoop()

运行结果：鼠标点击，显示点击坐标

 

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

def init():
    glClearColor(0.0, 0.0, 0.0, 1.0)
    gluOrtho2D(-1.0, 1.0, -1.0, 1.0)

def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)

    #先画一横一竖两条直线
    glBegin(GL_LINES)
    glVertex2f(-1.0, 0.0)
    glVertex2f(1.0, 0.0)
    glVertex2f(0.0, 1.0)
    glVertex2f(0.0, -1.0)
    glEnd()

    #右上部分的3个点
    glPointSize(5.0)
    glBegin(GL_POINTS)
    glColor3f(1.0, 0.0, 0.0)
    glVertex2f(0.3, 0.3)
    glColor3f(0.0, 1.0, 0.0)
    glVertex2f(0.6, 0.6)
    glColor3f(0.0, 0.0, 1.0)
    glVertex2f(0.9, 0.9)
    glEnd()

    #左上部分的
    glColor3f(1.0, 1.0, 0)
    glBegin(GL_QUADS)
    glVertex2f(-0.2, 0.2)
    glVertex2f(-0.2, 0.5)
    glVertex2f(-0.5, 0.5)
    glVertex2f(-0.5, 0.2)
    glEnd()
    #左下
    glColor3f(0.0, 1.0, 1.0)
    glPolygonMode(GL_FRONT, GL_LINE)
    glPolygonMode(GL_BACK, GL_FILL)
    glBegin(GL_POLYGON)
    glVertex2f(-0.5, -0.1)
    glVertex2f(-0.8, -0.3)
    glVertex2f(-0.8, -0.6)
    glVertex2f(-0.5, -0.8)
    glVertex2f(-0.2, -0.6)
    glVertex2f(-0.2, -0.3)
    glEnd()
    #右下
    glPolygonMode(GL_FRONT, GL_FILL)
    glPolygonMode(GL_BACK, GL_LINE)
    glBegin(GL_POLYGON)
    glVertex2f(0.5, -0.1)
    glVertex2f(0.2, -0.3)
    glVertex2f(0.2, -0.6)
    glVertex2f(0.5, -0.8)
    glVertex2f(0.8, -0.6)
    glVertex2f(0.8, -0.3)
    glEnd()

    glFlush()

glutInit()
glutInitDisplayMode(GLUT_RGBA|GLUT_SINGLE)
glutInitWindowSize(400, 400)
glutCreateWindow("Sencond")

glutDisplayFunc(drawFunc)
init()
glutMainLoop()

运行结果，画了一点图