Translation and zooming of squares
// Tip: After writing the code, please save it and then evaluate it.
#include <GL/freeglut.h>
#include<stdio.h>
//Header files used for evaluation code-start
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
//Header files used for evaluation code-end
void init(void)
{
glClearColor(0.0, 0.0, 0.0, 0.0); //Set the background color
glMatrixMode(GL_PROJECTION);
gluOrtho2D(-5.0, 5.0, -5.0, 5.0); //Set the display range to X:-5.0~5.0, Y:-5.0~5.0
glMatrixMode(GL_MODELVIEW);
}
void myDraw(void) //Two-dimensional geometric transformation
{
// Please add your code here
/********** Begin **********/
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
glPushMatrix();
glColor3f(1.0, 0.0, 0.0);
glRectf(-1.0,-1.0,1.0,1.0);
glTranslatef(0.0f, 2.0f, 0.0f);
glScalef(3.0, 0.5, 1.0);
glColor3f(1.0, 1.0, 1.0);
glRectf(-1.0,-1.0,1.0,1.0);
glPopMatrix();
/********** End **********/
glFlush();
}
int main(int argc, char *argv[])
{
glutInit( & argc, argv);
glutInitWindowPosition(100, 100);
glutInitWindowSize(400, 400);
glutCreateWindow("Geometric Transformation Example");
init();
glutDisplayFunc( & amp;myDraw);
glutMainLoopEvent();
/****************The following is the evaluation code and has nothing to do with the content of this experiment. Please do not modify it**************/
GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//Allocate memory
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;
}
Translation and rotation of square
// Tip: After writing the code, please save it and then evaluate it.
#include <GL/freeglut.h>
#include<stdio.h>
//Header files used for evaluation code-start
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
//Header files used for evaluation code-end
void init(void)
{
glClearColor(0.0, 0.0, 0.0, 0.0); //Set the background color
glMatrixMode(GL_PROJECTION);
gluOrtho2D(-5.0, 5.0, -5.0, 5.0); //Set the display range to X:-5.0~5.0, Y:-5.0~5.0
glMatrixMode(GL_MODELVIEW);
}
void myDraw(void) //Two-dimensional geometric transformation
{
// Please add your code here
/********** Begin **********/
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
glPushMatrix();
glColor3f(1.0, 0.0, 0.0);
glRectf(-1.0,-1.0,1.0,1.0);
glPopMatrix();
glTranslatef(-3.0, 0.0, 0.0);
glPushMatrix();
glRotatef(45.0, 0.0, 0.0, 3.0);
glColor3f(0.0, 1.0, 0.0);
glRectf(-1.0,-1.0,1.0,1.0);
glPopMatrix();
glTranslatef(6.0, 0.0, 0.0);
glPushMatrix();
glRotatef(45.0, 0.0, 0.0, 1.0);
glColor3f(0.0, 0.7, 0.0);
glRectf(-1.0,-1.0,1.0,1.0);
glFlush();
/********** End ************/
glFlush();
}
int main(int argc, char *argv[])
{
glutInit( & argc, argv);
glutInitWindowPosition(100, 100);
glutInitWindowSize(400, 400);
glutCreateWindow("Geometric Transformation Example");
init();
glutDisplayFunc( & amp;myDraw);
glutMainLoopEvent();
/****************The following is the evaluation code and has nothing to do with the content of this experiment. Please do not modify it**************/
GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//Allocate memory
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;
}
Transformation combination of squares
// Tip: After writing the code, please save it and then evaluate it.
#include <GL/freeglut.h>
#include<stdio.h>
//Header files used for evaluation code-start
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
//Header files used for evaluation code-end
void init(void)
{
glClearColor(0.0, 0.0, 0.0, 0.0); //Set the background color
glMatrixMode(GL_PROJECTION);
gluOrtho2D(-5.0, 5.0, -5.0, 5.0); //Set the display range to X:-5.0~5.0, Y:-5.0~5.0
glMatrixMode(GL_MODELVIEW);
}
void myDraw(void) //Two-dimensional geometric transformation
{
// Please add your code here
/********** Begin **********/
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
glPushMatrix();
glColor3f(1.0, 0.0, 0.0);
glRectf(-1.0,-1.0,1.0,1.0);
glPopMatrix();
glPushMatrix();
glTranslatef(0.0f, 2.0f, 0.0f);
glScalef(3.0, 0.5, 1.0);
glColor3f(1.0, 1.0, 1.0);
glRectf(-1.0,-1.0,1.0,1.0);
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(-1.0,-1.0,1.0,1.0);
glPopMatrix();
glTranslatef(6.0, 0.0, 0.0);
glPushMatrix();
glRotatef(45.0, 0.0, 0.0, 1.0);
glColor3f(0.0, 0.7, 0.0);
glRectf(-1.0,-1.0,1.0,1.0);
glPopMatrix();
glPopMatrix();
glTranslatef(0.0, -3.0, 0.0);
glScalef(4.0, 1.5, 1.0);
glColor3f(0.0, 0.0, 1.0);
glRectf(-1.0,-1.0,1.0,1.0);
/********** End ************/
glFlush();
}
int main(int argc, char *argv[])
{
glutInit( & argc, argv);
glutInitWindowPosition(100, 100);
glutInitWindowSize(400, 400);
glutCreateWindow("Geometric Transformation Example");
init();
glutDisplayFunc( & amp;myDraw);
glutMainLoopEvent();
/****************The following is the evaluation code and has nothing to do with the content of this experiment. Please do not modify it**************/
GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//Allocate memory
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;
}
Mitsubishi shape
// Tip: After writing the code, please save it and then evaluate it.
#include <GL/freeglut.h>
#include<stdio.h>
//Header files used for evaluation code-start
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
//Header files used for evaluation code-end
void init(void)
{
glClearColor(0.0, 0.0, 0.0, 0.0); //Set the background color
glMatrixMode(GL_PROJECTION);
gluOrtho2D(-5.0, 5.0, -5.0, 5.0); //Set the display range to X:-5.0~5.0, Y:-5.0~5.0
glMatrixMode(GL_MODELVIEW);
}
void drawDiamond(void) //Draw a diamond
{
// Please add your code here
/********** Begin **********/
glBegin(GL_POLYGON); //Vertex designation needs to be in the counterclockwise direction
glVertex2f(0.0f, -1.0f); //Lower point
glVertex2f(2.0f, 0.0f); //right point
glVertex2f(0.0f, 1.0f); //upper point
glVertex2f(-2.0f, 0.0f); //Left point
glEnd();
/********** End ************/
}
void myDraw(void) //Two-dimensional geometric transformation
{
// Please add your code here
/********** Begin **********/
glClear(GL_COLOR_BUFFER_BIT); //Clear
glLoadIdentity(); //Set the current matrix as the identity matrix
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(); //green diamond on the left
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(); //Blue diamond on the right
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(); //The red diamond on the top
glPopMatrix();
glFlush();
/********** End **********/
glFlush();
}
int main(int argc, char *argv[])
{
glutInit( & argc, argv);
glutInitWindowPosition(100, 100);
glutInitWindowSize(400, 400);
glutCreateWindow("Geometric Transformation Example");
init();
glutDisplayFunc( & amp;myDraw);
glutMainLoopEvent();
/****************The following is the evaluation code and has nothing to do with the content of this experiment. Please do not modify it**************/
GLubyte* pPixelData = (GLubyte*)malloc(400 * 400 * 3);//Allocate memory
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;
}