三維茶壺

// ConsoleApplication1.cpp : 定義控制檯應用程序的入口點。
//

#include "stdafx.h"
#include <stdlib.h>  
#include <GL/glut.h>  
#include<iostream>
#pragma comment(lib, "glut32.lib")  
using namespace std;
GLfloat roate = 0.0;// set rote of roate設置旋轉速率
GLfloat rote = 0.0;//設置旋轉角度
GLfloat anglex = 0.0;//X 軸旋轉
GLfloat angley = 0.0;//Y 軸旋轉
GLfloat anglez = 0.0;//Z 軸旋轉
GLint WinW = 300;
GLint WinH = 300;
GLfloat oldx;//當左鍵按下時記錄鼠標座標  
GLfloat oldy;
void init(void)
{
    glClearColor(1.0, 1.0, 1.0, 1.0); //背景黑色  
}
void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(1.0, 0.0, 0.0); //畫筆紅色
    glLoadIdentity();  //加載單位矩陣  
    gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
    glRotatef(rote, 0.0f, 1.0f, 0.0f);
    glRotatef(anglex,1.0,0.0,0.0);
    glRotatef(angley,0.0,1.0,0.0);
    glRotatef(anglez,0.0,0.0,1.0);
    glutWireTeapot(2);
    rote += roate;
    //glRotatef(angle, 0.0, 1.0, 0.0);
    //angle += 1.0f;
    glutSwapBuffers();
}
void reshape(int w, int h)
{
    glViewport(0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}
void mouse(int button, int state, int x, int y)
{
    if (button == GLUT_LEFT_BUTTON)
    {
        if (state == GLUT_DOWN)
        {
            roate = 0;
            rote = 0;
            oldx = x;//當左鍵按下時記錄鼠標座標  
            oldy = y;
            cout << "left" << endl;
        }       
    }
    if (button == GLUT_RIGHT_BUTTON)
    {
        if (state == GLUT_DOWN)
        {
            roate += 1.0f;
            cout << "right" << endl;
        }   
    }
}
void motion(int x, int y)
{
    GLint deltax = oldx - x;
    GLint deltay = oldy - y;
    anglex  += 360 * (GLfloat)deltax / (GLfloat)WinW;//根據屏幕上鼠標滑動的距離來設置旋轉的角度  
    angley += 360 * (GLfloat)deltay / (GLfloat)WinH;
    anglez += 360 * (GLfloat)deltay / (GLfloat)WinH;
    oldx = x;//記錄此時的鼠標座標，更新鼠標座標  
    oldy = y;//若是沒有這兩句語句，滑動是旋轉會變得不可控  
    glutPostRedisplay();
    glutPostRedisplay();
}
int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowSize(600, 600);
    glutInitWindowPosition(100, 100);
    glutCreateWindow(argv[0]);
    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutIdleFunc(display);
    glutMainLoop();
    return 0;
}

---

// ConsoleApplication1.cpp : 定義控制檯應用程序的入口點。
//

#include "stdafx.h"

#include <windows.h>
#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif

#include <stdlib.h>

double angle = 0.0;

void initialize()
{
    glClearColor(1.0,1.0,1.0,0.0);
    //設置光照
    const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
    const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
    const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
    const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

    const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
    const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
    const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
    const GLfloat high_shininess[] = { 100.0f };

    glEnable(GL_CULL_FACE);
    glCullFace(GL_BACK);

    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

}

static void resize(int width, int height)
{
    //指定視口
    glViewport(0, 0, width, height);

    //投影變換---平截頭體
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(40.0,(GLdouble)width/(GLdouble)height,0.1,10000.0);
}

static void display(void)
{
    //視圖變換，指定相機
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0,0.0,5.0, 0.0,0.0,0.0, 0.0,1.0,0.0);

    //模型變換
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1.0,0.0,0.0);

    glPushMatrix();
    glRotatef(angle,0.0,1.0,0.0);
    glutSolidTeapot(1.0);
    glPopMatrix();

    glutSwapBuffers();
}


static void key(unsigned char key, int x, int y)
{
    switch (key)
    {
    case 27 :
    case 'q':
        exit(0);
        break;

    case '+':
        angle++;
        break;

    case '-':
        angle--;
        break;
    }

    glutPostRedisplay();
}



/* Program entry point */

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(640,480);
    glutInitWindowPosition(10,10);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    initialize();

    glutReshapeFunc(resize);
    glutDisplayFunc(display);
    glutKeyboardFunc(key);

    glutMainLoop();

    return EXIT_SUCCESS;
}