(2)攝影機、運鏡
(3)播放MP3
(4)作業需求討論
TODO 看jsyeh.org/sdcg10
下載Viewing in 3D PDF檔
TODO 課本範例 Projection.exe
老師操作
實際操作
設定垂直投影
#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();
}
不管事窗大小如何 茶壺大小都不變
#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();
}
立永滑鼠轉動茶壺
#include <GL/glut.h>
float eyeX=0, eyeY=0,eyeZ=-200;
void display()
{
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();
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);
glutMotionFunc(motion);
glutMainLoop();
}
茶壺打光
#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();
glOrtho(-w/2,w/2,-h/2,h/2,-1000,1000);
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();
}
播放MP3未完成
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