Develop a program to demonstrate 2D transformation on basic objects

Develop a program to demonstrate 2D transformation on basic objects

Program:

#include <GL/glut.h>

// Vertex coordinates for a square
GLfloat squareVertices[4][2] = {
    {-0.5, -0.5},
    {0.5, -0.5},
    {0.5, 0.5},
    {-0.5, 0.5}
};

// Vertex coordinates for a triangle
GLfloat triangleVertices[3][2] = {
    {-0.5, -0.5},
    {0.5, -0.5},
    {0.0, 0.5}
};

// Transformation parameters
GLfloat tx = 0.0, ty = 0.0; // Translation
GLfloat sx = 1.0, sy = 1.0; // Scaling
GLfloat angle = 0.0;        // Rotation angle

void drawSquare() {
    glBegin(GL_QUADS);
    for (int i = 0; i < 4; i++) {
        glVertex2fv(squareVertices[i]);
    }
    glEnd();
}

void drawTriangle() {
    glBegin(GL_TRIANGLES);
    for (int i = 0; i < 3; i++) {
        glVertex2fv(triangleVertices[i]);
    }
    glEnd();
}

void display() {
    glClear(GL_COLOR_BUFFER_BIT);
    
    // Apply transformations and draw square
    glPushMatrix();
    glTranslatef(tx, ty, 0.0);
    glRotatef(angle, 0.0, 0.0, 1.0);
    glScalef(sx, sy, 1.0);
    glColor3f(1.0, 0.0, 0.0); // Red color for square
    drawSquare();
    glPopMatrix();
    
    // Apply transformations and draw triangle
    glPushMatrix();
    glTranslatef(tx + 1.0, ty + 1.0, 0.0);
    glRotatef(angle, 0.0, 0.0, 1.0);
    glScalef(sx, sy, 1.0);
    glColor3f(0.0, 0.0, 1.0); // Blue color for triangle
    drawTriangle();
    glPopMatrix();
    
    glFlush();
}

void init() {
    glClearColor(0.0, 0.0, 0.0, 1.0);
    glColor3f(1.0, 1.0, 1.0);
    glMatrixMode(GL_PROJECTION);
    gluOrtho2D(-2.0, 2.0, -2.0, 2.0);
}

void keyboard(unsigned char key, int x, int y) {
    switch (key) {
        case 't': ty += 0.1; break; // Translate up
        case 'e': angle -= 5.0; break; // Rotate clockwise
        case 'i': sy += 0.1; sx += 0.1; break; // Scale up vertically
        case 27: exit(0); // ESC key to exit
    }
    glutPostRedisplay();
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(100, 100);
    glutCreateWindow("2D Transformations");
    init();
    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);
    glutMainLoop();
    return 0;
}