week13_02160615_成庭萱

(1)投影矩陣(Ortho Perspective)

#include <GL/glut.h>

void display()
{
    glPushMatrix();
        glutSolidTeapot(100);
    glPopMatrix();
    glFlush();
}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(800,600);
    glutCreateWindow("3D");
    glutDisplayFunc(display);
    glViewport(0,0,800,600);
    glMatrixMode(GL_PROJECTION);
    glOrtho(-400,400,-300,300,-1000,1000);
    glMatrixMode(GL_MODELVIEW);
    glutMainLoop();
}


(2)調視窗大小 茶壺不動

#include <GL/glut.h>

void display()

{

    glPushMatrix();

        glutSolidTeapot(100);

    glPopMatrix();

    glFlush();

}

void reshape(int w,int h)

{

    glViewport(0,0,w,h);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    glOrtho(-w/2,w/2,-h/2,h/2,-1000,1000);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitWindowSize(800,600);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutMainLoop();

}

(3)運鏡

#include <GL/glut.h>

float eyeX=-100,eyeY=80,eyeZ=-200;

void display()

{

    GLfloat pos[] = { 0, 0, 200, 0 };

    glLightfv(GL_LIGHT0, GL_POSITION, pos);

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_LIGHTING);

    glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        gluLookAt(eyeX,eyeY,eyeZ,0,0,0,0,1,0);

        glPushMatrix();

            glutSolidTeapot(100);

        glPopMatrix();

    glPopMatrix();

    glFlush();

}

void motion(int x,int y)

{

    eyeX=x-400;

    eyeY=300-y;

    glutPostRedisplay();

}

void reshape(int w,int h)

{

    glViewport(0,0,w,h);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluPerspective(90,w/h,0.001,10000);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

}

void timer(int t)

{

    glutTimerFunc(20,timer,t+1);

    eyeX+=2;

    if(eyeX>300) eyeY+=4;

    glutPostRedisplay();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitWindowSize(800,600);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutMotionFunc(motion);

    glutTimerFunc(0,timer,0);

    glutMainLoop();

}

(4)播放MP3

#include <GL/glut.h>

#include "CMP3_MCI.h"

CMP3_MCI MyMP3;

float eyeX=-100,eyeY=80,eyeZ=-200;

void display()

{

    GLfloat pos[] = { 0, 0, 200, 0 };

    glLightfv(GL_LIGHT0, GL_POSITION, pos);

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_LIGHTING);

    glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        gluLookAt(eyeX,eyeY,eyeZ,0,0,0,0,1,0);

        glPushMatrix();

            glutSolidTeapot(100);

        glPopMatrix();

    glPopMatrix();

    glFlush();

}

void motion(int x,int y)

{

    eyeX=x-400;

    eyeY=300-y;

    glutPostRedisplay();

}

void reshape(int w,int h)

{

    glViewport(0,0,w,h);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluPerspective(90,w/h,0.001,10000);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

}

void timer(int t)

{

    glutTimerFunc(20,timer,t+1);

    eyeX+=2;

    if(eyeX>300) eyeY+=4;

    glutPostRedisplay();

}

void keyboard(unsigned char key,int x,int y)

{

    MyMP3.Play();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitWindowSize(800,600);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutMotionFunc(motion);

    glutTimerFunc(0,timer,0);

    glutKeyboardFunc(keyboard);

    MyMP3.Load("music.mp3");

    glutMainLoop();

}