pyopengl全解析-4

前言

还是，番外篇链接附上。
跟新速度会稍慢一些，因为我有项目要做，请各位看官不要着急哈~

开始

今天学习一个很重要的东西——事件
OpenGL支持的事件很少，都是由GLUT提供的，有：

• 键盘按下(glutKeyboardFunc、glutSpecialFunc)
• 鼠标移动(glutMotionFunc、glutPassiveMotionFunc)
• 鼠标按下、放开(glutMouseFunc)

注册方式都是register(func)，例如 glutKeyboardFunc(keyboard)

---

glutKeyboardFunc

glutKeyboardFunc在c++中的原型是：

void glutKeyboardFunc(void (*func) (unsigned char key, int x, int y)); 

学过c++能看明白，其参数是一个以(按钮，鼠标x轴位置，鼠标y轴位置)为参数的函数。另glutKeyboardFunc不处理特殊键。

例子：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)
    glRotatef(1, 0, 1, 0)
    glutWireTeapot(0.5)
    glFlush()
def procKeyboard(key,x,y):
	print('KEYBOARD RECALL:')
	print('MOUSE:%s,%s'%(x,y))
	print('KEY:%s'%key.decode())
glutInit()
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitWindowSize(400, 400)
glutCreateWindow(b"First")
glutKeyboardFunc(procKeyboard)
glutDisplayFunc(drawFunc)
glutIdleFunc(drawFunc)
glutMainLoop()

glutSpecialFunc

函数原型$\downarrow$

void glutSpecialFunc(void (*func)(int key,int x,int y));

其与glutKeyboardFunc相似，但只处理特殊键$\downarrow$

• GLUT_KEY_BEGIN
• GLUT_KEY_DELETE
• GLUT_KEY_DOWN
• GLUT_KEY_END
• GLUT_KEY_F1
• GLUT_KEY_F2
• GLUT_KEY_F3
• GLUT_KEY_F4
• GLUT_KEY_F5
• GLUT_KEY_F6
• GLUT_KEY_F7
• GLUT_KEY_F8
• GLUT_KEY_F9
• GLUT_KEY_F10
• GLUT_KEY_F11
• GLUT_KEY_F12
• GLUT_KEY_HOME
• GLUT_KEY_INSERT
• GLUT_KEY_LEFT
• GLUT_KEY_NUM_LOCK
• GLUT_KEY_PAGE_DOWN
• GLUT_KEY_PAGE_UP
• GLUT_KEY_REPEAT_DEFAULT
• GLUT_KEY_REPEAT_OFF
• GLUT_KEY_REPEAT_ON
• GLUT_KEY_RIGHT
• GLUT_KEY_UP

例子：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)
    glRotatef(1, 0, 1, 0)
    glutWireTeapot(0.5)
    glFlush()
def procKeyboard(key,x,y):
	print('KEYBOARD RECALL:')
	print('MOUSE:%s,%s'%(x,y))
	print('KEY:%s'%key)
glutInit()
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitWindowSize(400, 400)
glutCreateWindow(b"First")
glutSpecialFunc(procKeyboard)
glutDisplayFunc(drawFunc)
glutIdleFunc(drawFunc)
glutMainLoop()

glutMotionFunc

拖拽事件

函数原型$\downarrow$

void glutMotionFunc(void(*func)(int x,int y));

例子：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)
    glRotatef(1, 0, 1, 0)
    glutWireTeapot(0.5)
    glFlush()
def procMotion(x,y):
	print('MOTION RECALL:')
	print('MOUSE:%s,%s'%(x,y))
glutInit()
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitWindowSize(400, 400)
glutCreateWindow(b"First")
glutMotionFunc(procMotion)
glutDisplayFunc(drawFunc)
glutIdleFunc(drawFunc)
glutMainLoop()

glutPassiveMotionFunc

鼠标移动事件

函数原型$\downarrow$

void glutPassivMotionFunc(void(*func)(int x,int y));

例子：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)
    glRotatef(1, 0, 1, 0)
    glutWireTeapot(0.5)
    glFlush()
def procMotion(x,y):
	print('MOTION RECALL:')
	print('MOUSE:%s,%s'%(x,y))
glutInit()
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitWindowSize(400, 400)
glutCreateWindow(b"First")
glutPassiveMotionFunc(procMotion)
glutDisplayFunc(drawFunc)
glutIdleFunc(drawFunc)
glutMainLoop()

glutMouseFunc

函数原型$\downarrow$

void glutMouseFunc(void(*func)(int x,int y));

例子：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
def drawFunc():
    glClear(GL_COLOR_BUFFER_BIT)
    glRotatef(1, 0, 1, 0)
    glutWireTeapot(0.5)
    glFlush()
def procMouse(btn,state,x,y):
	st = 'pressed' if(state == GLUT_DOWN) else 'released'
	print('MOTION RECALL:')
	print('button %s %s'%(btn,st))
	print('MOUSE:%s,%s'%(x,y))
glutInit()
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitWindowSize(400, 400)
glutCreateWindow(b"First")
glutMouseFunc(procMouse)
glutDisplayFunc(drawFunc)
glutIdleFunc(drawFunc)
glutMainLoop()

作者

hit-road

拜拜,下课!
回到顶部