Viewing in 3D.
投影矩陣- Orthographic
└ Perspective
window資料夾內,projection.exe範例可做投影(投影矩陣)
gluLookAt( eyex, eyey, eyez , aimx, aimy, aimz , upx, upy, upz )
glOrtho( 左 , 右 , 下 , 上 , 近 , 遠 );
可自訂視窗大小座標
#include <GL/glut.h>
void display()
{
glPushMatrix();
glutSolidTeapot(10);
glPopMatrix();
glFlush();
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitWindowSize(800,600);
glutCreateWindow("3D");
glutDisplayFunc(display);
///glutReshapeFunc(reshape);
glViewport(0,0,800,600);
glMatrixMode(GL_PROJECTION);
glOrtho(-40,40,-30,30,-100,100);
glMatrixMode(GL_MODELVIEW);
glutMainLoop();
}
物件不會受視窗大小影響
#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();
}
增加鏡頭,運鏡,打光;滑鼠可控制鏡頭
#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();
}
加入MP3檔 (將MP3檔放入freeglut/bin資料夾內)
#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();
}
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