week07_LSD'sHW

1. OpenCV

程式碼:
#include <opencv/highgui.h>//要去setting裡改link
int main()
{
    IplImage * img = cvLoadImage("a.jpg");//記得檔名和格式要一樣(檔案位置要和程式檔在同個地方)
    cvShowImage("week07",img);
    cvWaitKey(0);

}

2.OpenCV&Glut

想要把OPENCV和GLUT一起出現:
複製上面1.的程式碼
將opencv的主函式放入glut的主函式裡
記得在前面#include <opencv/highgui.h>

3. 期中考題 複習

①備份矩陣:glPushMatrix();

②移動glTranslatef(x,y,z);

③轉動glRotatef(angle,x,y,z);

④放大縮小glScalef(x,y,z)

⑤開始畫glBegin(GL_POLYGON);結束glEnd();

⑥顏色glColor3f(r,g,b);

⑦貼圖坐標glTexCoord2f(tx,ty);

⑧打光的法向量glNormal3f(nx,ny,nz);

⑨頂點glVertex3f(x,y,z);

⑩還原矩陣glPopMatrix();

4. 地球

#include <opencv/highgui.h> ///for cvLoadImage()

#include <opencv/cv.h> ///for cvCvtColor()

#include <GL/glut.h> ///3D glut

#include <stdio.h>

GLUquadric * quad;

GLuint id;

float angle=0;

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

        glRotatef(90, 1,0,0);

        glRotatef(angle, 0,0,1);///自動轉

        gluQuadricTexture(quad, 1);

        gluSphere(quad, 1, 30, 30);///glutSolidTeapot(0.3);

    glPopMatrix();///自動轉很帥

    glutSwapBuffers();

}

void timer(int t)

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

    angle+=1;///自動轉很帥

    glutPostRedisplay();

}

int myTexture(char *filename)

{

    IplImage * img = cvLoadImage(filename); ///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);

    return id;

}

void myInit()

{   quad = gluNewQuadric();

    id = myTexture("image.jpg");///要把你的 image.png放到執行目錄裡

}///ex. C:\Users\Administrator\Desktop\freeglut\bin 裡面, 看你的電腦在哪裡

int main(int argc, char**argv)

{   glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("3D");

    glutDisplayFunc(display); ///顯示

    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();

}