02160111_鄭庭峰 week11

(1) Timer計時器

#include <GL/glut.h>

float angle=0;

void display()

{

    glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0,1,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glFlush();

    ///    angle++;

}

void timer(int t)

{

    glutTimerFunc(10,timer,0);

    angle+=1;

    glutPostRedisplay();

}

int main (int argc, char**argv)

{

    glutInit(&argc, argv);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    ///glutIdleFunc(display);

    glutTimerFunc(10,timer,0);

    glutMainLoop();

}

茶壺會固定的旋轉

(2)多個貼圖

 

#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 timer(int t)

{

    glutTimerFunc(20, timer,0);  ///  1000 msec   50fps:20msec

    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);

    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

}

GLuint id; ///準備一個 unsigned int 整數, 叫 貼圖ID

GLuint id2; ///準備一個 unsigned int 整數, 叫 貼圖ID

void mouse(int button, int state, int x, int y)

{

    if(state==GLUT_UP)

        glBindTexture(GL_TEXTURE_2D, id2);

    else if(state==GLUT_DOWN)

        glBindTexture(GL_TEXTURE_2D, id);

}

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

    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);

    IplImage * img2 = cvLoadImage("image2.jpg"); ///OpenCV讀圖

    cvCvtColor(img2,img2, CV_BGR2RGB); ///OpenCV轉色彩 (需要cv.h)

    glEnable(GL_TEXTURE_2D); ///1. 開啟貼圖功能

    glGenTextures(1, &id2); /// 產生Generate 貼圖ID

    glBindTexture(GL_TEXTURE_2D, id2); ///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, img2->width, img2->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img2->imageData);

}   ///最後一行最難/最重要, 所貼圖影像的資料都設定好

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);

    glutMouseFunc(mouse);

    myInit(); ///我的 init 初始化 把貼圖準備好 前面OpenCV 2行, 後面 OpenGL 9行

    glutMainLoop();

}