计算机图形学头歌实训平台——二维几何变换

黄桃罐头_hhh

3616人浏览 · 2023-01-05 17:24:41

黄桃罐头_hhh · 2023-01-05 17:24:41 发布

第1关：正方形的平移与缩放

// 提示：写完代码请保存之后再进行评测
#include <GL/freeglut.h>
#include<stdio.h>

// 评测代码所用头文件-开始
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
// 评测代码所用头文件-结束

void init(void)
{  
    glClearColor(0.0, 0.0, 0.0, 0.0);       //设置背景颜色
    glMatrixMode(GL_PROJECTION);
    gluOrtho2D(-5.0, 5.0, -5.0, 5.0);       //设置显示的范围是X:-5.0~5.0, Y:-5.0~5.0
    glMatrixMode(GL_MODELVIEW);
}

void myDraw(void)                           //二维几何变换
{
   // 请在此添加你的代码
   /********** Begin ********/
    glPushMatrix();
    glColor3f(1.0, 0.0, 0.0);
    glRectf(-1.0f, - 1.0f,1.0f,1.0f);
    glPopMatrix();
    glPushMatrix();

    glTranslatef(0.0f,2.0f,0.0f);

    glPushMatrix();
    glScalef(3.0,0.5,1.0);
    glColor3f (1.0, 1.0, 1.0);
    glRectf(-1.0f, - 1.0f,1.0f,1.0f);

    glFlush();
    
   /********** End **********/                          
    glFlush();
}

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

    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(400, 400);
    glutCreateWindow("几何变换示例");
    
    init();
    glutDisplayFunc(&myDraw);
    glutMainLoopEvent();     
     
     
    /*************以下为评测代码，与本次实验内容无关，请勿修改**************/
    GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//分配内存
    GLint viewport[4] = {0};
    glReadBuffer(GL_FRONT);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
    glGetIntegerv(GL_VIEWPORT, viewport);
    glReadPixels(viewport[0], viewport[1], viewport[2], viewport[3], GL_RGB, GL_UNSIGNED_BYTE, pPixelData);

     cv::Mat img;
    std::vector<cv::Mat> imgPlanes;
    img.create(400, 400, CV_8UC3);
    cv::split(img, imgPlanes);
 
        for(int i = 0; i < 400; i ++) {
            unsigned char* plane0Ptr = imgPlanes[0].ptr<unsigned char>(i);
            unsigned char* plane1Ptr = imgPlanes[1].ptr<unsigned char>(i);
            unsigned char* plane2Ptr = imgPlanes[2].ptr<unsigned char>(i);
            for(int j = 0; j < 400; j ++) {
                int k = 3 * (i * 400 + j);
                plane2Ptr[j] = pPixelData[k];
                plane1Ptr[j] = pPixelData[k+1];
                plane0Ptr[j] = pPixelData[k+2];
            }
        }
        cv::merge(imgPlanes, img);
        cv::flip(img, img ,0); 
        cv::namedWindow("openglGrab");
        cv::imshow("openglGrab", img);
        //cv::waitKey();
        cv::imwrite("../img_step1/test.jpg", img);
    return 0;
}

第2关：正方形的平移和旋转

// 提示：写完代码请保存之后再进行评测
#include <GL/freeglut.h>
#include<stdio.h>

// 评测代码所用头文件-开始
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
// 评测代码所用头文件-结束

void init(void)
{  
    glClearColor(0.0, 0.0, 0.0, 0.0);       //设置背景颜色
    glMatrixMode(GL_PROJECTION);
    gluOrtho2D(-5.0, 5.0, -5.0, 5.0);       //设置显示的范围是X:-5.0~5.0, Y:-5.0~5.0
    glMatrixMode(GL_MODELVIEW);
}

void myDraw(void)                           //二维几何变换
{
   // 请在此添加你的代码
    glPushMatrix();
    glColor3f(1.0, 0.0, 0.0);
    glRectf(-1.0f, - 1.0f,1.0f,1.0f);
    glPopMatrix();
    //glPushMatrix();

    glTranslatef(-3.0f,0.0f,0.0f);

    glPushMatrix();
    glRotatef(45.0,0.0,0.0,1.0);
    glColor3f (0.0, 1.0, 0.0);
    glRectf(-1.0f, - 1.0f,1.0f,1.0f);
    glPopMatrix();

    glTranslatef(6.0f,0.0f,0.0f);

    glPushMatrix();
    glRotatef(45.0,0.0,0.0,1.0);
    glColor3f (0.0, 0.7, 0.0);
    glRectf(-1.0f, - 1.0f,1.0f,1.0f);
    glPopMatrix();
    glFlush();

   /********** End **********/                          
    glFlush();
}

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

    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(400, 400);
    glutCreateWindow("几何变换示例");
    
    init();
    glutDisplayFunc(&myDraw);
    glutMainLoopEvent();     
     
     
    /*************以下为评测代码，与本次实验内容无关，请勿修改**************/
    GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//分配内存
    GLint viewport[4] = {0};
    glReadBuffer(GL_FRONT);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
    glGetIntegerv(GL_VIEWPORT, viewport);
    glReadPixels(viewport[0], viewport[1], viewport[2], viewport[3], GL_RGB, GL_UNSIGNED_BYTE, pPixelData);

     cv::Mat img;
    std::vector<cv::Mat> imgPlanes;
    img.create(400, 400, CV_8UC3);
    cv::split(img, imgPlanes);
 
        for(int i = 0; i < 400; i ++) {
            unsigned char* plane0Ptr = imgPlanes[0].ptr<unsigned char>(i);
            unsigned char* plane1Ptr = imgPlanes[1].ptr<unsigned char>(i);
            unsigned char* plane2Ptr = imgPlanes[2].ptr<unsigned char>(i);
            for(int j = 0; j < 400; j ++) {
                int k = 3 * (i * 400 + j);
                plane2Ptr[j] = pPixelData[k];
                plane1Ptr[j] = pPixelData[k+1];
                plane0Ptr[j] = pPixelData[k+2];
            }
        }
        cv::merge(imgPlanes, img);
        cv::flip(img, img ,0); 
        cv::namedWindow("openglGrab");
        cv::imshow("openglGrab", img);
        //cv::waitKey();
        cv::imwrite("../img_step2/test.jpg", img);
    return 0;
}

第3关：正方形的变换组合

// 提示：写完代码请保存之后再进行评测
#include <GL/freeglut.h>
#include<stdio.h>

// 评测代码所用头文件-开始
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
// 评测代码所用头文件-结束

void init(void)
{  
    glClearColor(0.0, 0.0, 0.0, 0.0);       //设置背景颜色
    glMatrixMode(GL_PROJECTION);
    gluOrtho2D(-5.0, 5.0, -5.0, 5.0);       //设置显示的范围是X:-5.0~5.0, Y:-5.0~5.0
    glMatrixMode(GL_MODELVIEW);
}

void myDraw(void)                           //二维几何变换
{
   // 请在此添加你的代码
   /********** Begin ********/
    glClear (GL_COLOR_BUFFER_BIT); //清空
    glLoadIdentity(); //将当前矩阵设为单位矩阵

    glPushMatrix();
    glTranslatef(0.0f,2.0f,0.0f);
    glScalef(3.0,0.5,1.0);
    glColor3f (1.0, 1.0, 1.0);
    glRectf(-1.0f, -1.0f, 1.0f, 1.0f); //上面白色矩形
    glPopMatrix();

    glPushMatrix();

    glTranslatef(-3.0,0.0,0.0);

    glPushMatrix();
    glRotatef(45.0,0.0,0.0,1.0);
    glColor3f (0.0, 1.0, 0.0);
    glRectf(-1.0f, -1.0f, 1.0f, 1.0f); //中间左菱形
    glPopMatrix();

    glTranslatef(3.0,0.0,0.0);

    glPushMatrix();
    glColor3f (1.0, 0.0, 0.0);
    glRectf(-1.0f, -1.0f, 1.0f, 1.0f); //中间中菱形
    glPopMatrix();

    glTranslatef(3.0,0.0,0.0);

    glPushMatrix();
    glRotatef(45.0,0.0,0.0,1.0);
    glColor3f (0.0, 0.7, 0.0);
    glRectf(-1.0f, -1.0f, 1.0f, 1.0f); //中间右菱形
    glPopMatrix();

    glPopMatrix();

    glTranslatef(0.0,-3.0,0.0);
    glScalef(4.0,1.5,1.0);
    glColor3f (0.0, 0.0, 1.0);
    glRectf(-1.0f, -1.0f, 1.0f, 1.0f); //下面蓝色矩形

    glFlush ( );

   /********** End **********/                          
    glFlush();
}

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

    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(400, 400);
    glutCreateWindow("几何变换示例");
    
    init();
    glutDisplayFunc(&myDraw);
    glutMainLoopEvent();     
     
     
    /*************以下为评测代码，与本次实验内容无关，请勿修改**************/
    GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//分配内存
    GLint viewport[4] = {0};
    glReadBuffer(GL_FRONT);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
    glGetIntegerv(GL_VIEWPORT, viewport);
    glReadPixels(viewport[0], viewport[1], viewport[2], viewport[3], GL_RGB, GL_UNSIGNED_BYTE, pPixelData);

     cv::Mat img;
    std::vector<cv::Mat> imgPlanes;
    img.create(400, 400, CV_8UC3);
    cv::split(img, imgPlanes);
 
        for(int i = 0; i < 400; i ++) {
            unsigned char* plane0Ptr = imgPlanes[0].ptr<unsigned char>(i);
            unsigned char* plane1Ptr = imgPlanes[1].ptr<unsigned char>(i);
            unsigned char* plane2Ptr = imgPlanes[2].ptr<unsigned char>(i);
            for(int j = 0; j < 400; j ++) {
                int k = 3 * (i * 400 + j);
                plane2Ptr[j] = pPixelData[k];
                plane1Ptr[j] = pPixelData[k+1];
                plane0Ptr[j] = pPixelData[k+2];
            }
        }
        cv::merge(imgPlanes, img);
        cv::flip(img, img ,0); 
        cv::namedWindow("openglGrab");
        cv::imshow("openglGrab", img);
        //cv::waitKey();
        cv::imwrite("../img_step3/test.jpg", img);
    return 0;
}

第4关：三菱形状

// 提示：写完代码请保存之后再进行评测
#include <GL/freeglut.h>
#include<stdio.h>

// 评测代码所用头文件-开始
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
// 评测代码所用头文件-结束

void init(void)
{  
    glClearColor(0.0, 0.0, 0.0, 0.0);       //设置背景颜色
    glMatrixMode(GL_PROJECTION);
    gluOrtho2D(-5.0, 5.0, -5.0, 5.0);       //设置显示的范围是X:-5.0~5.0, Y:-5.0~5.0
    glMatrixMode(GL_MODELVIEW);
}
void drawDiamond(void)                        //绘制一个菱形
{
   // 请在此添加你的代码
   /********** Begin ********/
    glBegin (GL_POLYGON); //顶点指定需要按逆时针方向
    glVertex2f (0.0f,-1.0f);//下点
    glVertex2f (2.0f,0.0f);//右点
    glVertex2f (0.0f, 1.0f);//上点
    glVertex2f (-2.0f,0.0f);//左点
    glEnd ( );

   /********** End **********/
}

void myDraw(void)                           //二维几何变换
{
   // 请在此添加你的代码
   /********** Begin ********/
    glClear(GL_COLOR_BUFFER_BIT); //清空
    glLoadIdentity(); //将当前矩阵设为单位矩阵

    glPushMatrix();
    glRotatef(30.0, 0.0, 0.0, 1.0);
    glTranslatef(-2.0, 0.0, 0.0);
    glColor3f(0.0, 1.0, 0.0);
    drawDiamond();
    glPopMatrix();

    glPushMatrix();
    glRotatef(150.0, 0.0, 0.0, 1.0);
    glTranslatef(-2.0, 0.0, 0.0);
    glColor3f(0.0, 0.0, 1.0);
    drawDiamond();
    glPopMatrix();

    glPushMatrix();
    glRotatef(270.0, 0.0, 0.0, 1.0);
    glTranslatef(-2.0, 0.0, 0.0);
    glColor3f(1.0, 0.0, 0.0);
    drawDiamond();
   /********** End **********/                          
    glFlush();
}

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

    glutInit(&argc, argv);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(400, 400);
    glutCreateWindow("几何变换示例");
    
    init();
    glutDisplayFunc(&myDraw);
    glutMainLoopEvent();     
     
     
    /*************以下为评测代码，与本次实验内容无关，请勿修改**************/
    GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//分配内存
    GLint viewport[4] = {0};
    glReadBuffer(GL_FRONT);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
    glGetIntegerv(GL_VIEWPORT, viewport);
    glReadPixels(viewport[0], viewport[1], viewport[2], viewport[3], GL_RGB, GL_UNSIGNED_BYTE, pPixelData);

     cv::Mat img;
    std::vector<cv::Mat> imgPlanes;
    img.create(400, 400, CV_8UC3);
    cv::split(img, imgPlanes);
 
        for(int i = 0; i < 400; i ++) {
            unsigned char* plane0Ptr = imgPlanes[0].ptr<unsigned char>(i);
            unsigned char* plane1Ptr = imgPlanes[1].ptr<unsigned char>(i);
            unsigned char* plane2Ptr = imgPlanes[2].ptr<unsigned char>(i);
            for(int j = 0; j < 400; j ++) {
                int k = 3 * (i * 400 + j);
                plane2Ptr[j] = pPixelData[k];
                plane1Ptr[j] = pPixelData[k+1];
                plane0Ptr[j] = pPixelData[k+2];
            }
        }
        cv::merge(imgPlanes, img);
        cv::flip(img, img ,0); 
        cv::namedWindow("openglGrab");
        cv::imshow("openglGrab", img);
        //cv::waitKey();
        cv::imwrite("../img_step4/test.jpg", img);
    return 0;
}

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