立方体三维观察

第一关 立方体模型变换第二关 立方体视图变换第三关 立方体三点透视第四关 立方体平行投影第五关 立方体视口变换

第一关 立方体模型变换

// 提示：在合适的地方修改或添加代码#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GLint winWidth = 400, winHeight =400 ; //设置初始化窗口大小/*观察坐标系参数设置*/GLfloat x0 = 0.0, yy = 0.0, z0 = 5.0; //设置观察坐标系原点 GLfloat xref = 0.0, yref = 0.0, zref = 0.0;//设置观察坐标系参考点（视点） GLfloat Vx = 0.0, Vy = 1.0, Vz = 0.0; //设置观察坐标系向上向量（y轴） /*观察体参数设置 */GLfloat xwMin = -1.0, ywMin = -1.0, xwMax = 1.0, ywMax = 1.0;//设置裁剪窗口坐标范围GLfloat dnear = 1.5, dfar = 20.0;//设置远、近裁剪面深度范围void init(void){glClearColor(0.0, 0.0, 0.0, 0.0);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glLoadIdentity();/*观察变换*/gluLookAt(x0, yy, z0, xref, yref, zref, Vx, Vy, Vz); //指定三维观察参数// 请在此添加你的代码/********** Begin ********/glPushMatrix();glTranslatef(-2.0f,0.0f,0.0f);glColor3f (0.0, 0.0, 1.0);glutSolidCube (1.0);glPopMatrix();glPushMatrix();glColor3f (1.0, 0.0, 0.0);glutWireCube (1.0);glPopMatrix();glPushMatrix();glTranslatef(2.0f,0.0f,0.0f);glColor3f (0.0, 1.0, 0.0);glLineWidth (2.0);glutWireCube (1.0);glPopMatrix();/********** End **********/glFlush();}void reshape(GLint newWidth, GLint newHeight){/*视口变换*/glViewport(0, 0, newWidth, newHeight);//定义视口大小/*投影变换*/glMatrixMode(GL_PROJECTION);glLoadIdentity();/*透视投影，设置透视观察体*/glFrustum(xwMin, xwMax, ywMin, ywMax, dnear, dfar);/*模型变换*/glMatrixMode(GL_MODELVIEW);winWidth = newWidth;winHeight = newHeight;}int main(int argc, char* argv[]){glutInit(&argc, argv);glutInitWindowPosition(100, 100);glutInitWindowSize( 400 , 400 ); //设置初始化窗口大小glutCreateWindow("三维观察");init();glutDisplayFunc(display);glutReshapeFunc(reshape);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(800 * 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;}

第二关 立方体视图变换

// 提示：在合适的地方修改或添加代码#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GLint winWidth = 400, winHeight =400 ; //设置初始化窗口大小/*观察坐标系参数设置*/GLfloat x0 = 1.0, yy = 1.5, z0 = 8.0; //设置观察坐标系原点 GLfloat xref = 0.0, yref = 0.0, zref = 0.0;//设置观察坐标系参考点（视点） GLfloat Vx = 0.0, Vy = 1.0, Vz = 0.0; //设置观察坐标系向上向量（y轴） /*观察体参数设置 */GLfloat xwMin = -1.0, ywMin = -1.0, xwMax = 1.0, ywMax = 1.0;//设置裁剪窗口坐标范围GLfloat dnear = 1.5, dfar = 20.0;//设置远、近裁剪面深度范围void init(void){glClearColor(0.0, 0.0, 0.0, 0.0);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glLoadIdentity();/*观察变换*/gluLookAt(x0, yy, z0, xref, yref, zref, Vx, Vy, Vz); //指定三维观察参数// 请在此添加你的代码/********** Begin ********/glPushMatrix();glColor3f(1.0, 0.0, 0.0);glutWireCube(1.0);glPopMatrix();glPushMatrix();glColor3f(0.0, 1.0, 0.0);glLineWidth(2.0);glTranslatef(2.0f,0.0f,0.0f);glutWireCube(1.0);glPopMatrix();glPushMatrix();glColor3f(0.0, 0.0, 1.0);glLineWidth(2.0);glTranslatef(-2.0f,0.0f,0.0f);glutSolidCube(1.0);glPopMatrix();/********** End **********/glFlush();}void reshape(GLint newWidth, GLint newHeight){/*视口变换*/glViewport(0, 0, newWidth, newHeight);//定义视口大小/*投影变换*/glMatrixMode(GL_PROJECTION);glLoadIdentity();/*透视投影，设置透视观察体*/gluPerspective( 45, 1, 1, 100);/*模型变换*/glMatrixMode(GL_MODELVIEW);winWidth = newWidth;winHeight = newHeight;}int main(int argc, char* argv[]){GLubyte* pPixelData = (GLubyte*)malloc(800 * 400 * 3);//分配内存GLint viewport[4] = {0 };glutInit(&argc, argv);glutInitWindowPosition(100, 100);glutInitWindowSize( 400 , 400 ); //设置初始化窗口大小glutCreateWindow("三维观察");init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutMainLoopEvent();/*************以下为评测代码，与本次实验内容无关，请勿修改**************/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;}

第三关 立方体三点透视

// 提示：在合适的地方修改或添加代码#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GLint winWidth = 400, winHeight =400 ; //设置初始化窗口大小/*观察坐标系参数设置*/GLfloat x0 = 0.0, yy = 0.0, z0 = 5.0; //设置观察坐标系原点 GLfloat xref = 0.0, yref = 0.0, zref = 0.0;//设置观察坐标系参考点（视点） GLfloat Vx = 0.0, Vy = 1.0, Vz = 0.0; //设置观察坐标系向上向量（y轴） /*观察体参数设置 */GLfloat xwMin = -1.0, ywMin = -1.0, xwMax = 1.0, ywMax = 1.0;//设置裁剪窗口坐标范围GLfloat dnear = 1.5, dfar = 20.0;//设置远、近裁剪面深度范围void init(void){glClearColor(0.0, 0.0, 0.0, 0.0);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glLoadIdentity();/*观察变换*/gluLookAt(x0, yy, z0, xref, yref, zref, Vx, Vy, Vz); //指定三维观察参数// 请在此添加你的代码/********** Begin ********/glPushMatrix();glTranslatef(-2.0f,0.0f,0.0f);glColor3f (0.0, 0.0, 1.0);glutSolidCube (1.0);glPopMatrix();glPushMatrix();glColor3f (1.0, 0.0, 0.0);glutWireCube (1.0);glPopMatrix();glPushMatrix();glTranslatef(2.0f,0.0f,0.0f);glRotatef(30.0,1.0,0.0,0.0);glColor3f (0.0, 1.0, 0.0);glLineWidth (2.0);glutWireCube (1.0);glPopMatrix();/********** End **********/glFlush();}void reshape(GLint newWidth, GLint newHeight){/*视口变换*/glViewport(0, 0, newWidth, newHeight);//定义视口大小/*投影变换*/glMatrixMode(GL_PROJECTION);glLoadIdentity();/*透视投影，设置透视观察体*/glFrustum(xwMin, xwMax, ywMin, ywMax, dnear, dfar);/*模型变换*/glMatrixMode(GL_MODELVIEW);winWidth = newWidth;winHeight = newHeight;}int main(int argc, char* argv[]){glutInit(&argc, argv);glutInitWindowPosition(100, 100);glutInitWindowSize( 400 , 400 ); //设置初始化窗口大小glutCreateWindow("三维观察");init();glutDisplayFunc(display);glutReshapeFunc(reshape);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(800 * 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;}

第四关 立方体平行投影

// 提示：在合适的地方修改或添加代码#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GLint winWidth = 400, winHeight =400 ; //设置初始化窗口大小/*观察坐标系参数设置*/GLfloat x0 = 0.0, yy = 0.0, z0 = 5.0; //设置观察坐标系原点 GLfloat xref = 0.0, yref = 0.0, zref = 0.0;//设置观察坐标系参考点（视点） GLfloat Vx = 0.0, Vy = 1.0, Vz = 0.0; //设置观察坐标系向上向量（y轴） /*观察体参数设置 */GLfloat xwMin = -1.0, ywMin = -1.0, xwMax = 1.0, ywMax = 1.0;//设置裁剪窗口坐标范围GLfloat dnear = 1.5, dfar = 20.0;//设置远、近裁剪面深度范围void init(void){glClearColor(0.0, 0.0, 0.0, 0.0);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glLoadIdentity();/*观察变换*/gluLookAt(x0, yy, z0, xref, yref, zref, Vx, Vy, Vz); //指定三维观察参数// 请在此添加你的代码/********** Begin ********/glPushMatrix();glTranslatef(-2.0f,0.0f,0.0f);glColor3f (0.0, 0.0, 1.0);glutSolidCube (1.0);glPopMatrix();glPushMatrix();glColor3f (1.0, 0.0, 0.0);glutWireCube (1.0);glPopMatrix();glPushMatrix();glTranslatef(2.0f,0.0f,0.0f);glColor3f (0.0, 1.0, 0.0);glLineWidth (2.0);glutWireCube (1.0);glPopMatrix();/********** End **********/glFlush();}void reshape(GLint newWidth, GLint newHeight){/*视口变换*/glViewport(0, 0, newWidth, newHeight);//定义视口大小/*投影变换*/glMatrixMode(GL_PROJECTION);glLoadIdentity();/*平行投影*/glOrtho( -3.0, 3.0, -3.0, 3.0,-100.0 , 100.0);/*模型变换*/glMatrixMode(GL_MODELVIEW);winWidth = newWidth;winHeight = newHeight;}int main(int argc, char* argv[]){GLubyte* pPixelData = (GLubyte*)malloc(800 * 400 * 3);//分配内存GLint viewport[4] = {0 };glutInit(&argc, argv);glutInitWindowPosition(100, 100);glutInitWindowSize( 400 , 400 ); //设置初始化窗口大小glutCreateWindow("三维观察");init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutMainLoopEvent();/*************以下为评测代码，与本次实验内容无关，请勿修改**************/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;}

第五关 立方体视口变换

// 提示：在合适的地方修改或添加代码#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GLint winWidth = 800, winHeight = 400; //设置初始化窗口大小/*观察坐标系参数设置*/GLfloat x0 = 0.0, yy = 0.0, z0 = 5.0; //设置观察坐标系原点 GLfloat xref = 0.0, yref = 0.0, zref = 0.0;//设置观察坐标系参考点（视点） GLfloat Vx = 0.0, Vy = 1.0, Vz = 0.0; //设置观察坐标系向上向量（y轴） /*观察体参数设置 */GLfloat xwMin = -1.0, ywMin = -1.0, xwMax = 1.0, ywMax = 1.0;//设置裁剪窗口坐标范围GLfloat dnear = 1.5, dfar = 20.0;//设置远、近裁剪面深度范围void init(void){glClearColor(0.0, 0.0, 0.0, 0.0);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glLoadIdentity();/*观察变换*/gluLookAt(x0, yy, z0, xref, yref, zref, Vx, Vy, Vz); //指定三维观察参数// 请在此添加你的代码/********** Begin ********/glPushMatrix();glTranslatef(-2.0f,0.0f,0.0f);glColor3f (0.0, 0.0, 1.0);glutSolidCube (1.0);glPopMatrix();glPushMatrix();glColor3f (1.0, 0.0, 0.0);glutWireCube (1.0);glPopMatrix();glPushMatrix();glTranslatef(2.0f,0.0f,0.0f);glColor3f (0.0, 1.0, 0.0);glLineWidth (2.0);glutWireCube (1.0);glPopMatrix();/********** End **********/glFlush();}void reshape(GLint newWidth, GLint newHeight){/*视口变换*/glViewport(0, 0, newWidth, newHeight);//定义视口大小/*投影变换*/glMatrixMode(GL_PROJECTION);glLoadIdentity();/*透视投影，设置透视观察体*/gluPerspective( 45,2 ,1 ,100 );/*模型变换*/glMatrixMode(GL_MODELVIEW);winWidth = newWidth;winHeight = newHeight;}int main(int argc, char* argv[]){GLubyte* pPixelData = (GLubyte*)malloc(800 * 400 * 3);//分配内存GLint viewport[4] = {0 };glutInit(&argc, argv);glutInitWindowPosition(100, 100);glutInitWindowSize( 800, 400 ); //设置初始化窗口大小glutCreateWindow("三维观察");init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutMainLoopEvent();/*************以下为评测代码，与本次实验内容无关，请勿修改**************/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, 800, 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 < 800; j++) {int k = 3 * (i * 800 + 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_step5/test.jpg", img);return 0;}