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2022年6月26日 星期日

VERY BEAUTIFUL, VERY POWERFUL

一.
    安裝freeglut並設定好，在打開Codeblocks建個新的glut專案project:week10_texturere
，在把上禮拜的程式複製進來，在main函式內新增myTexture("earth.jpg"); 這行程式碼
///
#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可
#include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * week09_opencv)
{

    IplImage * img = cvLoadImage(week09_opencv); ///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 display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glutSolidTeapot(0.3);
    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);
    myTexture("earth.jpg"); ///地球的地圖，等下才會進來
    glutMainLoop();
}
///
    然後按照上禮拜的設定設定OpenCV
    下載一張地球的圖並放到freeglut->lib的資料夾內



二.
    把期中考考的glBegin(GL_POLYGON) 、glEnd()、glTexCoord2f(tx,ty)、glVertex3f(x,y,z)都加main函式就可以執行出地圖了
///
#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可
#include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * week09_opencv)
{

    IplImage * img = cvLoadImage(week09_opencv); ///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 display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    Begin(GL_POLYGON);
            glTexCoord2f(0,1);glVertex2f(-1,-1);
            glTexCoord2f(1,1);glVertex2f(+1,-1);
            glTexCoord2f(1,0);glVertex2f(+1,+1);
            glTexCoord2f(0,0);glVertex2f(-1,+1);
    glEnd();

    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);
    myTexture("earth.jpg"); ///地球的地圖，等下才會進來
    glutMainLoop();
}
///
三.
    直接新增一個新glut專案，命名為week10_texture_earth並把剛剛的程式貼上來
///
#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可
#include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * week09_opencv)
{

    IplImage * img = cvLoadImage(week09_opencv); ///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 display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    gluQuadricTexture(sphere, 1);///=設好貼圖
    gluSphere(sphere, 1, 30, 30);///圓球
    /*Begin(GL_POLYGON);
            glTexCoord2f(0,1);glVertex2f(-1,-1);
            glTexCoord2f(1,1);glVertex2f(+1,-1);
            glTexCoord2f(1,0);glVertex2f(+1,+1);
            glTexCoord2f(0,0);glVertex2f(-1,+1);
    glEnd();*/
    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);
    myTexture("earth.jpg"); ///地球的地圖，等下才會進來
    sphere = gluNewQuadric();///準備好二次曲面
    glutMainLoop();
}
///


為了讓地球能夠旋轉
新增一個flaot angle=0;
在display() 加入Rotatef(angle,0,0,1)函數(讓地球旋轉)
///
#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可
#include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * week09_opencv)
{

    IplImage * img = cvLoadImage(week09_opencv); ///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;
}
float angle = 0;///旋轉角度
void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    gluQuadricTexture(sphere, 1);///=設好貼圖
    gluSphere(sphere, 1, 30, 30);///圓球
    /*Begin(GL_POLYGON);
            glTexCoord2f(0,1);glVertex2f(-1,-1);
            glTexCoord2f(1,1);glVertex2f(+1,-1);
            glTexCoord2f(1,0);glVertex2f(+1,+1);
            glTexCoord2f(0,0);glVertex2f(-1,+1);
    glEnd();*/
    glutSwapBuffers();
    angle+=0.1;///每次執行display()增加一度
}
int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);
    myTexture("earth.jpg"); ///地球的地圖，等下才會進來
    sphere = gluNewQuadric();///準備好二次曲面
    glutMainLoop();
}
///
四.
    為了讓地球轉正(1)，然後不要破圖(2)
    (1)在display()中新增 glRotatef(90,1,0,0);
    (2)在main函式中 新增 glEnable(GL_DEPTH_TEST); 開啟3D功能
///
#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可
#include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * week09_opencv)
{

    IplImage * img = cvLoadImage(week09_opencv); ///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;
}
float angle = 0;///旋轉角度
void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();
        glRotatef(90, 1, 0, 0);
        glRotatef(angle, 0, 0, 1);
        gluQuadricTexture(sphere, 1);///=設好貼圖
        gluSphere(sphere, 1, 30, 30);///圓球
    glPopMatrix();
    /*Begin(GL_POLYGON);
            glTexCoord2f(0,1);glVertex2f(-1,-1);
            glTexCoord2f(1,1);glVertex2f(+1,-1);
            glTexCoord2f(1,0);glVertex2f(+1,+1);
            glTexCoord2f(0,0);glVertex2f(-1,+1);
    glEnd();*/
    glutSwapBuffers();
    angle+=0.1;///每次執行display()增加一度
}
int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 texture");

    glEnable(GL_DEPTH_TEST);///開啟3D的功能，看起來比較立體
    glutDisplayFunc(display);
    myTexture("earth.jpg"); ///地球的地圖，等下才會進來
    sphere = gluNewQuadric();///準備好二次曲面
    glutMainLoop();
}
///


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2022年5月6日 星期五

電腦圖學筆記 week10

筆記

討論: 期中考成績、快篩
        1)主題: 上週貼圖+貼到四邊形=背景圖
        2)主題: 上週貼圖+貼到圓球=會轉的地球
        3)主題: 上週貼圖+貼到模型=鋼彈模型


1.背景圖

#include <opencv/highgui.h>
#include <opencv/cv.h>
#include <GL/glut.h>
int myTexture(char * filename)
{
    IplImage * img = cvLoadImage(filename);
    cvCvtColor(img,img, CV_BGR2RGB);
    glEnable(GL_TEXTURE_2D);
    GLuint id;
    glGenTextures(1, &id);
    glBindTexture(GL_TEXTURE_2D, id);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);
    return id;
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glBegin(GL_POLYGON);
        glTexCoord2f(0,1);  glVertex2f(-1,-1);///左下
        glTexCoord2f(1,1);  glVertex2f(1,-1);///右下
        glTexCoord2f(1,0);  glVertex2f(1,1);///右上
        glTexCoord2f(0,0);  glVertex2f(-1,1);///左上
    glEnd();///圖片左上角是(0,0)，視窗左下角是(-1,-1)
    glutSwapBuffers();
}
int main(int argc,char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week10 texture background");
    glutDisplayFunc(display);
    myTexture("earth.jpg");
    glutMainLoop();
}

2.會轉的地球
#include <opencv/highgui.h>
#include <opencv/cv.h>
#include <GL/glut.h>
GLUquadric * sphere=NULL;///指到二次曲面的指標
int myTexture(char * filename)
{
    IplImage * img = cvLoadImage(filename);
    cvCvtColor(img,img, CV_BGR2RGB);
    glEnable(GL_TEXTURE_2D);
    GLuint id;
    glGenTextures(1, &id);
    glBindTexture(GL_TEXTURE_2D, id);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);
    return id;
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    gluQuadricTexture(sphere,1);///二次曲面貼圖(指標,是否貼圖)
    gluSphere(sphere,1,30,30);///圓球(指標,半徑,直切數,橫切數)
    glutSwapBuffers();
}
int main(int argc,char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week10 texture earth");
    glutDisplayFunc(display);
    myTexture("earth.jpg");
    sphere=gluNewQuadric();///準備二次曲面
    glutMainLoop();
}

3.鋼彈模型
#include <opencv/highgui.h> #include <opencv/cv.h> #include <GL/glut.h> GLUquadric * sphere=NULL; int myTexture(char * filename) { IplImage * img = cvLoadImage(filename); cvCvtColor(img,img, CV_BGR2RGB); glEnable(GL_TEXTURE_2D); GLuint id; glGenTextures(1, &id); glBindTexture(GL_TEXTURE_2D, id); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData); return id; } float angle=0; void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); glRotatef(90,1,0,0);///轉正地球 glRotatef(angle,0,0,1); gluQuadricTexture(sphere,1); gluSphere(sphere,1,30,30); glPopMatrix(); glutSwapBuffers(); angle+=1;///每次執行都轉1度 } int main(int argc,char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH); glutCreateWindow("week10 texture earth"); glEnable(GL_DEPTH_TEST);///3D深度測試，開了才有3D效果 glutIdleFunc(display);///有空就執行display glutDisplayFunc(display); myTexture("earth.jpg"); sphere=gluNewQuadric(); glutMainLoop(); }
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2022年5月3日 星期二

A

 WEEK10

1.貼圖

#include<GL/glut.h>
#include <opencv/highgui.h> #include <opencv/cv.h> #include <GL/glut.h> int myTexture(char * filename)
{
IplImage * img = cvLoadImage(filename);
cvCvtColor(img,img, CV_BGR2RGB);
glEnable(GL_TEXTURE_2D);
GLuint id;
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);
return id;
} void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_POLYGON);
glTexCoord2f(0,1); glVertex2f(-1,-1);
glTexCoord2f(1,1); glVertex2f(1,-1);
glTexCoord2f(1,0); glVertex2f(1,1);
glTexCoord2f(0,0); glVertex2f(-1,1);
glEnd();
glutSwapBuffers();
}
int main(int argc,char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week10 texture background");
glutDisplayFunc(display);
myTexture("earth.jpg");
glutMainLoop();
}
2.球不會貼
#include <opencv/highgui.h> 
#include <opencv/cv.h>
#include <GL/glut.h>
GLUquadric * sphere =NULL; 
int myTexture(char * filename)
{

    IplImage * img = cvLoadImage(filename); 
    cvCvtColor(img,img, CV_BGR2RGB); 
    glEnable(GL_TEXTURE_2D); 
    GLuint id; 
    glGenTextures(1, &id); 
    glBindTexture(GL_TEXTURE_2D, id); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);
    return id;
}

void display(){

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    gluQuadricTexture(sphere, 1); 
    gluSphere(sphere, 1, 30, 30); 
    glutSwapBuffers();

}

int main(int argc, char**argv){

    glutInit( &argc, argv );
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week09 texture");


    glutDisplayFunc(display);
    myTexture("OIP.png"); 
    sphere=gluNewQuadric(); 


    glutMainLoop();

}





















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