於week07

 week07

貼圖 Texture

下載老師給的範例

到老師的網頁 https://jsyeh.org/3dcg10/ 下載 win32 和data

解壓縮win32 和 data

將data放入window

打開 Transformation.exe

改變GlColor4f 會變色

改變glVertex3f 會改變頂點

改變glTexCoord2f會改變貼圖座標

OpenCV

安裝OpenCV (不要勾選原本的 勾第二個)

Compiler的目錄  C:\OpenCV2.1\include

Linker的目錄 C:\OpenCV2.1\lib

Linker Setting 要加入 cv210 cxcore210 highgui210

設定好即可開始打程式

開新的Empty file

存檔在桌面

找一張圖放桌面取名image.jpg

貼上貼紙

week07-1

#include <opencv/highgui.h>

int main(){

    IplImage * img = cvLoadImage("image.jpg");

    cvShowImage("week07", img);

    cvWaitKey(0);

}

有圖案的茶壺

week07-2

*去gist.github.com/jsyeh複製mytexture_sample.cpp

找一張jpg圖放入freeglut\bin

開啟GLUT

並貼上

#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);

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

int main(int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week07 texture");

    glutDisplayFunc(display);

    myTexture("earth.jpg");

    glutMainLoop();

}

地球旋轉

week07-3

#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, 0);glVertex2f(-1, +1);

        glTexCoord2f(1, 0);glVertex2f(+1, +1);

        glTexCoord2f(1, 1);glVertex2f(+1, -1);

        glTexCoord2f(0, 1);glVertex2f(-1, -1);

    glEnd();

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

int main(int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);

    myTexture("earth.jpg");

    glutMainLoop();

}

旋轉地球

week07-4

去gist.github.com/jsyeh複製myEarth.cpp

#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(angle, 0,-1,0);

        glRotatef(90, 1,0,0);

        gluQuadricTexture(sphere, 1);

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

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week10 texture background");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    myTexture("myEarth.jpg");

    sphere = gluNewQuadric();

    glEnable(GL_DEPTH_TEST);

    glutMainLoop();

}

如何github

1. 開啟 Git Bash

2. cd desktop 進入桌面
    git clone https://github.com/jsyeh/2021cce2 把雲端複製下來
    cd 2021cce2 進入你的目錄

3. 把你的 桌面\2021cce2 裡面, 放好你本週的程式 ex. week06 裡面有今天的程式

4. 先把你放好的程式,加入 git 的帳冊
git status (看到紅紅的檔案)

git add .

git status (看到綠綠的檔案)

5. 你要 commit 它
git config --global user.email jsyeh@mail.mcu.edu.tw
git config --global user.name jsyeh

git commit -m "add week06" 

6. git push 推送上雲端