等速轉動的地球
#include <opencv/highgui.h> ///for cvLoadImage()
#include <opencv/cv.h> ///for cvCvtColor()
#include <GL/glut.h> ///3D glut
#include <stdio.h>
float angle=0; ///自動轉很帥
GLUquadric * quad;
void display()
{ glEnable(GL_DEPTH_TEST); ///要啟動 Detph Test 深度值的測試,3D顯示才正確
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();///自動轉很帥
glRotatef(90, 1,0,0);
glRotatef(angle, 0,0,1);///自動轉很帥
gluQuadricTexture(quad, 1);
gluSphere(quad, 0.5, 30, 30); ///glutSolidTeapot(0.3);
glPopMatrix();///自動轉很帥
glFlush();
angle+=1;///自動轉很帥
}
void myInit()
{
quad = gluNewQuadric();
IplImage * img = cvLoadImage("image.jpg"); ///OpenCV讀圖
cvCvtColor(img,img, CV_BGR2RGB); ///OpenCV轉色彩 (需要cv.h)
glEnable(GL_TEXTURE_2D); ///1. 開啟貼圖功能
GLuint id; ///準備一個 unsigned int 整數, 叫 貼圖ID
glGenTextures(1, &id); /// 產生Generate 貼圖ID
glBindTexture(GL_TEXTURE_2D, id); ///綁定bind 貼圖ID
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖T, 就重覆貼圖
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖S, 就重覆貼圖
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); /// 貼圖參數, 放大時的內插, 用最近點
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); /// 貼圖參數, 縮小時的內插, 用最近點
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);
} ///最後一行最難/最重要, 所貼圖影像的資料都設定好
void timer(int t)
{/// 1000 msec 50fps:20msec
glutTimerFunc(20, timer, 0);
//printf("timer now\n");
glutPostRedisplay();
}
int main(int argc, char**argv)
{ glutInit(&argc, argv);
glutCreateWindow("3D");
glutDisplayFunc(display); ///顯示
//glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)
glutTimerFunc(0, timer, 0);
myInit(); ///我的 init 初始化 把貼圖準備好 前面OpenCV 2行, 後面 OpenGL 9行
glutMainLoop();
}
Freeglut timer 利用timer旋轉的茶壺
#include <GL/glut.h>
float angle=0;
void timer(int t)
{
glutTimerFunc(10,timer,t+1);
angle+=1;
glutPostRedisplay();
}
void display()
{
glEnable(Gl_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,1,0);
glutSolidTeapot(0.5);
glPopMatrix();
glFlush();
}
int main(int argc, char**argv)
{
glutInit(&argc,argv);
glutCreateWindow("3d");
glutDisplayFunc(display);
glutTimerFunc(10,timer,0);
glutMainLoop();
}
逆時針轉加自身旋轉的茶壺
#include <GL/glut.h>
#include <math.h>
float angle=0,potX=0,potY=0;
void timer(int t)
{
glutTimerFunc(10,timer,t+1);
angle+=1;
potX=cos(angle/180.0*3.14);
potY=0.5*sin(angle/180.0*3.14);
glutPostRedisplay();
}
void display()
{
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef(potX,potY,0);
glRotatef(angle,0,1,0);
glutSolidTeapot(0.5);
glPopMatrix();
glFlush();
}
int main(int argc, char**argv)
{
glutInit(&argc,argv);
glutCreateWindow("3d");
glutDisplayFunc(display);
glutTimerFunc(10,timer,0);
glutMainLoop();
}
上下彈跳加自身旋轉的茶壺
#include <GL/glut.h>
#include <math.h>
float angle=0,potX=0,potY=0;
void timer(int t)
{
glutTimerFunc(10,timer,t+1);
angle+=1;
//potX=cos(angle/180.0*3.14);
potY=0.5*sin(angle/180.0*3.14);
glutPostRedisplay();
}
void display()
{
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef(potX,potY,0);
glRotatef(angle,0,1,0);
glutSolidTeapot(0.5);
glPopMatrix();
glFlush();
}
int main(int argc, char**argv)
{
glutInit(&argc,argv);
glutCreateWindow("3d");
glutDisplayFunc(display);
glutTimerFunc(10,timer,0);
glutMainLoop();
}
憤怒的小茶壺
#include <GL/glut.h>
#include <math.h>
float angle=0, potX=0, potY=0, potVX=0, potVY=0;
int potState=0;
void timer(int t)
{
glutTimerFunc(10,timer, t+1);
angle+=1;
if(potState==0) potY=0.5*sin(angle/180.0*3.14);
if(potState==2){
potX+=potVX;
potY+=potVY;
}
glutPostRedisplay();
}
void display()
{ glEnable(GL_DEPTH_TEST); ///要啟動 Detph Test 深度值的測試,3D顯示才正確
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glutSolidTeapot(0.02);
glPushMatrix();///自動轉很帥
glTranslatef(potX,potY,0);
glRotatef(angle, 0,1,0);///自動轉很帥
glutSolidTeapot(0.03);
glPopMatrix();///自動轉很帥
glFlush();
}
void mouse(int button, int state,int x, int y )
{
if(state==GLUT_DOWN) potState=1;
else if(state==GLUT_UP){
potState=2;
potVX=-(x-350)/3500.0;
potVY=(y-350)/3500.0;
}
}
void motion(int x,int y)
{
if(potState==1){
potX=(x-350)/350.0;
potY=-(y-350)/350.0;
}
}
int main(int argc, char**argv)
{ glutInit(&argc, argv);
glutCreateWindow("angry");
glutReshapeWindow(700,700);
glutDisplayFunc(display);
glutTimerFunc(10,timer,0);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutMainLoop();
}
