第二章 開(kāi)發(fā)環(huán)境的建立

1、主講：汪日偉Email：2參考教材：OpenGL編程權(quán)威指南(第六版)http:/http:/ C+ & OpenGL gl庫(kù)： GL.H OPENGL32.LIB， opengl32.dll glu庫(kù) GLU.H GLU32.LIB glu32.dll glut庫(kù) glut.h glut32.lib glut32.dll#include / OpenGL32#include / GLu32#include / GLut #pragma comment( lib, opengl32.lib) #pragma comment( lib, glu32

2、.lib) #pragma comment( lib, glut32.lib) / GLut #pragma comment( linker, /subsystem:windows /entry:mainCRTStartup ) 功能 創(chuàng)建OpenGL程序 框架 創(chuàng)建Glut窗口 在窗口中繪制一個(gè)三角形The main part of the program. GLUT is used to open the OpenGL window, and handle input from the user void glutInit(int *argc, char *argv); Parameter

3、s:argc - A pointer to the unmodified argc variable from the main function. argv - A pointer to the unmodified argv variable from the main function. void glutInitWindowPosition(int x, int y); Parameters:x - the number of pixels from the left of the screen. -1 is the default value, meaning it is up to

4、 the window manager to decide where the window will appear. If not using the default values then you should pick a positive value, preferably one that will fit in your screen.y - the number of pixels from the top of the screen. The comments mentioned for the x parameter also apply in here. void glut

5、InitWindowSize(int width, int height); Parameters: width - The width of the window height - the height of the window void glutInitDisplayMode(unsigned int mode) Parameters: mode - specifies the display mode GLUT_RGBA or GLUT_RGB - default color mode. GLUT_INDEX - selects a color index mode. GLUT_SIN

6、GLE - single buffer window GLUT_DOUBLE - double buffer window GLUT_ACCUM - The accumulation buffer GLUT_STENCIL - The stencil buffer GLUT_DEPTH - The depth buffer int glutCreateWindow(char *title); Parameters: title - sets the window title void glutReshapeFunc(void (*func)(int width, int height); Pa

7、rameters:func - The name of the function that will be responsible for setting the correct perspective when the window changes size. void glutDisplayFunc(void (*func)(void); Parameters: func - the name of the function to be called when the window needs to be redrawn. Note: it is illegal to pass NULL

8、as the argument to this function. void glutIdleFunc(void (*func)(void); Parameters: func - The name of the function that will be called whenever the application is idle. void glutSwapBuffers(); / GLUT_DOUBLEThe function cause the front and back buffers to switch thereby showing what was previously d

9、rawn in the back buffer. void glutKeyboardFunc(void (*func) (unsigned char key, int x, int y); Parameters:func - The name of the function that will process the normal keyboard events. Passing NULL as an argument causes GLUT to ignore normal keys. func: 處理普通按鍵消息的函數(shù)的名稱。第一個(gè)表示按下的鍵的ASCII碼，其余兩個(gè)為當(dāng)鍵按下時(shí)當(dāng)前的鼠標(biāo)

10、位置。鼠標(biāo)位置是相對(duì)于當(dāng)前客戶窗口的左上角而言的。 void glutSpecialFunc(void (*func) (int key, int x, int y); Parameters:func - The name of the function that will process the special keyboard events. Passing NULL as an argument causes GLUT to ignore the special keys. GLUT_KEY_F1 F1 function key GLUT_KEY_F2 F2 function key G

11、LUT_KEY_F3 F3 function key GLUT_KEY_F4 F4 function key GLUT_KEY_F5 F5 function key GLUT_KEY_F6 F6 function key GLUT_KEY_F7 F7 function key GLUT_KEY_F8 F8 function key GLUT_KEY_F9 F9 function key GLUT_KEY_F10 F10 function key GLUT_KEY_F11 F11 function key GLUT_KEY_F12 F12 function key GLUT_KEY_LEFT L

12、eft function key GLUT_KEY_RIGHT Up function key GLUT_KEY_UP Right function key GLUT_KEY_DOWN Down function key GLUT_KEY_PAGE_UP Page Up function key GLUT_KEY_PAGE_DOWN Page Down function key GLUT_KEY_HOME Home function key GLUT_KEY_END End function key GLUT_KEY_INSERT Insert function key int glutGetModifiers(void); 1：GLUT_ACTIVE_SHIFT: 返回它，當(dāng)按下SHIFT鍵或按下CAPS LOCK. 注意兩者同時(shí)按下時(shí)，不會(huì)返回這個(gè)值。 2：GLUT_ACTIVE_CTRL: 按下CTRL鍵。 3：GLUT_ACTIVE_ATL: 按下ATL鍵。 void processNormalKeys(unsigned char key, int x, int y) if (key = 27) exit(0); else if (key=r) int mod = glutGetModifiers (); if (mod = GLUT_ACTIVE_ALT)