Graphics Lab 1 assignment

#include<GL/gl.h>
#include<GL/glu.h>
#include<GL/glut.h>
#include<stdlib.h>
#include<stdio.h>
#include<windows.h>

int windowWidth = 800;
int windowHeight = 600;

int rot = 0;

float Txval = 0;
float Tyval = 0;

float sval = 1.00;
float rval = 1.00;

bool flagScale = false;
bool firstFlag = true;
bool lastFlag = false;

void triangle()
{
    glBegin(GL_TRIANGLES);
    // Define a group of vertices that define one or more primitives
        glColor3f(1.0, 1.0, 1.0);
        glVertex2f(2.0, 2.0);
        glColor3f(0.0, 1.0, 1.0);
        glVertex2f(2.0, 0.0);
        glColor3f(0.0, 1.0, 0.0);
        glVertex2f(0.0, 0.0);
    glEnd();
    // Terminates a list of vertices that specifies a primitive initiated by glBegin
}

void rectangle()
{
    glBegin(GL_QUADS);

        glColor3f(0.0, 1.0, 0.0);
        glVertex2f(1.0, 2.0);
        glColor3f(0.0, 1.0, 0.0);
        glVertex2f(0.0, 2.0);
        glColor3f(1.0, 0.0, 0.0);
        glVertex2f(0.0, 0.0);
        glColor3f(1.0, 0.0, 0.0);
        glVertex2f(1.0, 0.0);
    glEnd();
}

void cube()
{
    glBegin(GL_QUADS);                // Begin drawing the color cube with 6 quads
    // Top face (y = 1.0f)
    // Define vertices in counter-clockwise (CCW) order with normal pointing out

  glColor3f(0.0f, 1.0f, 0.0f);     // Green
      glVertex3f( 1.0f, 1.0f, -1.0f);
      glVertex3f(-1.0f, 1.0f, -1.0f);
      glVertex3f(-1.0f, 1.0f,  1.0f);
      glVertex3f( 1.0f, 1.0f,  1.0f);

      // Bottom face (y = -1.0f)
      glColor3f(1.0f, 0.5f, 0.0f);     // Orange
      glVertex3f( 1.0f, -1.0f,  1.0f);
      glVertex3f(-1.0f, -1.0f,  1.0f);
      glVertex3f(-1.0f, -1.0f, -1.0f);
      glVertex3f( 1.0f, -1.0f, -1.0f);

      // Front face  (z = 1.0f)
      glColor3f(1.0f, 0.0f, 0.0f);     // Red
      glVertex3f( 1.0f,  1.0f, 1.0f);
      glVertex3f(-1.0f,  1.0f, 1.0f);
      glVertex3f(-1.0f, -1.0f, 1.0f);
      glVertex3f( 1.0f, -1.0f, 1.0f);

      // Back face (z = -1.0f)
      glColor3f(1.0f, 1.0f, 0.0f);     // Yellow
      glVertex3f( 1.0f, -1.0f, -1.0f);
      glVertex3f(-1.0f, -1.0f, -1.0f);
      glVertex3f(-1.0f,  1.0f, -1.0f);
      glVertex3f( 1.0f,  1.0f, -1.0f);

      // Left face (x = -1.0f)
      glColor3f(0.0f, 0.0f, 1.0f);     // Blue
      glVertex3f(-1.0f,  1.0f,  1.0f);
      glVertex3f(-1.0f,  1.0f, -1.0f);
      glVertex3f(-1.0f, -1.0f, -1.0f);
      glVertex3f(-1.0f, -1.0f,  1.0f);

      // Right face (x = 1.0f)
      glColor3f(1.0f, 0.0f, 1.0f);     // Magenta
      glVertex3f(1.0f,  1.0f, -1.0f);
      glVertex3f(1.0f,  1.0f,  1.0f);
      glVertex3f(1.0f, -1.0f,  1.0f);
      glVertex3f(1.0f, -1.0f, -1.0f);



    glEnd();

}

void display_first(void)
{

        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();

        glViewport(0, 0, windowWidth/2, windowHeight/2);

        rectangle();
}

void myKeyboardFunc( unsigned char key, int x, int y)
{
    switch(key)
    {
    case '2':
        flagScale=true;
        firstFlag=false;
        lastFlag=false;
        break;
    case '1':
        flagScale=false;
        firstFlag=true;
        lastFlag=false;
        break;
    case '3':
        flagScale=false;
        firstFlag=false;
        lastFlag=true;
        break;
    case 27:
        exit(1);
    }
    glutPostRedisplay();
}

void animate()
{
    if(flagScale)
    {
        rval += 0.5;
        if(rval >= 359)
            rval = 1.0;
    }

    glutPostRedisplay();
}

void translate()
{
    glMatrixMode(GL_MODELVIEW);

    glTranslatef(0.0, 0.0, 0.0);
}

void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(-3, 3, -3, 3, -3, 10);

        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();

    if(flagScale)
    {
        glPushMatrix();
        glRotatef(rval, 0, 0, 1);
        triangle();
        glPopMatrix();
    }

    if(firstFlag)
    {
        glPushMatrix();
        rectangle();
        glPopMatrix();
    }

    if(lastFlag)
    {
        glPushMatrix();
        glRotatef(45,0,1,0);
        glRotatef(45,1,0,0);
        glRotatef(rot,1,0,1);
        cube();
        glPopMatrix();
    }

    glFlush();
    glutSwapBuffers();
}

int main(int argc, char **argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);

    glutInitWindowPosition(100, 100);
    glutInitWindowSize(windowWidth/2, windowHeight/2);
    glutCreateWindow("Lab-1 assignment");

    glShadeModel(GL_SMOOTH);
    glEnable(GL_DEPTH_TEST);

    glutDisplayFunc(display);

    glutIdleFunc(animate);

    glutKeyboardFunc(myKeyboardFunc);

    glutMainLoop();
}