(2)攝影機、運鏡
(3)播放mp3
(4)作業需求討論
TO do : http://jsyeh.org/3dcg10下載 view in 3D PDF檔
TO do : projection.exe
gluLookAt (eye x y z
center x y z
up x y z)
TO do : 垂直投影
glViewport(0, 0, 800, 600);
glMatrixMode(GL_PROJECTION);
glOrtho(左, 右, 下, 上, 近, 遠);
glMatrixMode(GL_MODELVIEW);
茶壺會隨著視窗的改變而變形放大縮小↓
#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);
//glutReshapeFunc(reshapes);
glViewport(0,0, 800, 600);
glMatrixMode(GL_PROJECTION);
glOrtho(-400,400,-300,300,-1000,1000);
glMatrixMode(GL_MODELVIEW);
glutMainLoop();
}
茶壺不會依視窗大小的改變而變形放大縮小↓
#include <GL/glut.h>
void display()
{
glPushMatrix();
glutSolidTeapot(100);
glPopMatrix();
glFlush();
}
void reshape(int w, int h) //即使改變視窗大小,茶壺也不會因此改變大小
{
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();
}
#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); //運鏡,眼睛從哪裡, 看哪裡, 上面在哪裡
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();
}
![]() |
記得將CMP3_MCI.h檔案放入專案和freeglut的bin |
加入音樂檔,讓程式可以跑出音樂
#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) //即使改變視窗大小,茶壺也不會因此改變大小
{
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) eyeX+=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();
}
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