鹿的電腦圖學筆記week10

 Step01:

1.加入上週程式如下:

#include <GL/glut.h>

#include <opencv/highgui.h>

#include <opencv/cv.h>

    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 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("week10_texture");

    glutDisplayFunc(display);

    myTexture("earth1.jpg");

    glutMainLoop();

}

2.修改opencv設定

Settings->Compiler

在Search directions->Compiler加入C:\OpenCV2.1\Include

再到Search directions->Linker加入C:\OpenCV2.1\lib

到LinkerSettins加入cv210,cxcore210,highgui210

3.修改圖片位置(查看Build log裡面的workplace)

4.執行結果

Step02:

1.display()加入以下程式:

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();

2.加入GLUquadric *sphere=NULL;///指標，只到二次曲面

3.在display()加入

gluQuadricTexture(sphere,1);

gluSphere(sphere,1,30,30);

4.在main()加入

sphere=gluNewQuadric();

5.執行結果

Step03:

1.寫入float angle=0;

2.在display()寫入

glPushMatrix();

    glRotatef(angle,0,0,1);

    gluSphere(sphere,1,30,30);

glPopMatrix();

angle+=0.1;

3.在main()加入

glutIdleFunc(display);

4.執行結果

5.在display()加入

glRotatef(90,1,0,0);

6.在main()加入

glEnable(GL_DEPTH_TEST);///

7.執行