OpenGL - 光照

這個是書上的代碼，就是一個茶壺加上光照。以後學深了再補。

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運行效果：

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代碼如下：

#include<cstdio>
#include<GL\glut.h>
#include<Windows.h>
#include<algorithm>
using namespace std;
void init()
{
    GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat mat_shininess[] = { 50.0 };
    GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
    GLfloat white_light[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat Light_Model_Ambient[] = { 0.2, 0.2, 0.2, 1.0 };

    glClearColor(0, 0, 0, 0);
    glShadeModel(GL_SMOOTH);

    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light);
    glLightfv(GL_LIGHT0, GL_SPECULAR, white_light);
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, Light_Model_Ambient);

    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.8);
    glFlush();
}
void reshape(int w, int h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h)
        glOrtho(-1.5, 1.5, -1.5*h / w, 1.5*h / w, -10, 10);
    else
        glOrtho(-1.5*w / h, 1.5*w / h, -1.5, 1.5, -10, 10);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}
void initWindow(int &argc, char *argv[], int width, int height, char *title)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH);
    glutInitWindowPosition((GetSystemMetrics(SM_CXSCREEN) - width) >> 1, (GetSystemMetrics(SM_CYSCREEN) - height) >> 1);       //指定窗口位置
    glutInitWindowSize(width, height);       //指定窗口大小
    glutCreateWindow(title);
}
int main(int argc,char** argv)
{
    initWindow(argc, argv, 1000, 500, "光照實驗");

    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);

    glutMainLoop();
    return 0;
}