Week08 柯建良

1.

<期中考複習>
glPushMatrix(); //push 備份矩陣

    glTranslatef( x, y, z); //移動
    glRotatef(角度, x, y, z,); //旋轉
    glScalef( x, y, z); //縮放

    glBegin(GL_POLYGON); //開始

        glNormal3f( nx, ny, nz); //法向量
        glTexCoord2f(tx, ty); //貼圖座標

        glColor3f(r, g, b); //色彩
        glVertex3f(x, y, z); //頂點

    glEnd(); //結束

glPopMatrix(); //pop還原矩陣

2.

下載opencv 2.1.0

OpenCV for Windows, VC2008, special pack

安裝選項

codeblock opencv 設定

codeblock 程式

#include <opencv/highgui.h>
int main()
{
    IplImage * img = cvLoadImage("C:\\Users\\Public\\Pictures\\Sample Pictures\\Desert.jpg");
    cvNamedWindow("cv");
    cvShowImage("cv", img);
    cvWaitKey(0);
}

重開codeblock

執行程式

完成

地球

程式

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

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

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

#include <stdio.h>

float angle=0, earthX=-0.8, earthY=-0.3, earthVY=0, earthVX=0; ///自動轉很帥

GLUquadric * quad;

int pikaState=0;

void timer(int t)

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

    angle+=1;///自動轉很帥

    if(pikaState==0){

        //earthX=0.8*cos(angle*3.14/180);

        //earthY=0.8*sin(angle*3.14/180);

    }else if(pikaState==2){

        earthX+=earthVX;

        earthY+=earthVY;

        if(earthY<=-0.30001){earthVY=0; earthY=-0.3;}

        if(earthY>-0.3000) earthVY-=0.0098;

    }

    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

        glTranslatef(earthX, earthY, 0);

        glRotatef(90, 1,0,0);

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

        gluQuadricTexture(quad, 1);

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

    glPopMatrix();///自動轉很帥

    glFlush();

}

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);

        pikaState=2;

        //earthVX=??

        //earthVY= 0.1;

        earthVY= (y-150.0)/500;

        earthVX= (150.0-x)/500;

    }else if(state==GLUT_DOWN){

        pikaState=1;

        glBindTexture(GL_TEXTURE_2D, id);

    }

}

void motion(int x, int y){

    earthX=(x-150.0)/150.0;

    earthY=(150.0-y)/150.0;

}

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 keyboard(unsigned char key, int x, int y)

{

    if(key==' ') {

            earthVY= 0.13;

            pikaState=2;

    }

}

void myInit()

{   quad = gluNewQuadric();

    id = myTexture("image.jpg");

    id2 = myTexture("image2.jpg");

}   ///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

    glutTimerFunc(0, timer, 0);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

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

    glutMainLoop();

}