glut_moving.cpp

glut_moving.cpp

#include <iostream>
#include<GL/gl.h>
#include <GL/glut.h>
#include <math.h>

using namespace std;

#define PI 3.1415926535897932384626433832795

float _move = 0.0f;
float _wave = 0.0f;

void drawScene() {


    glClearColor(52, 152, 219,1.0);
    glClear (GL_COLOR_BUFFER_BIT);


	glLoadIdentity();
	glMatrixMode(GL_MODELVIEW);



    glPushMatrix();
    glTranslatef(-_wave, 0.0f, 0.0f);

    //water
    glColor3d(0.0f,0.8f,1.0f);
    glBegin(GL_POLYGON);
        glVertex3f(-50.0f, -1.0f, 0.0f);
        glVertex3f(50.0f, -1.0f, 0.0f);
        glVertex3f(50.0f, -0.5f, 0.0f);


        float bend = 0.1;
        for(float i = -49; i < 50; i = i + 0.3)
        {
                glVertex3f(i, -0.5 + bend, 0.0f);
                glVertex3f(i+0.2, -0.5, 0.0f);
        }


        glVertex3f(-50.0f, -0.5f, 0.0f);
	glEnd();


    glPopMatrix();

    glPushMatrix();


    //Draw Circle
			glBegin(GL_POLYGON);
			glColor3d(0.9,0.9,0);
				for(double i = 0; i < 2 * PI; i += PI / 8) {
 					glVertex3f(cos(i) * 0.15-0.7, sin(i) * 0.15, 0.0);
				}
			glEnd();


    glTranslatef(-0.5, 0.0f, 0.0f);


	glTranslatef(_move, 0.0f, 0.0f);

	//ship
	glColor3d(0.1,0,0.1);
    glBegin(GL_POLYGON);
        glVertex3f(-0.1f, -0.5f, 0.0f);
        glVertex3f(-0.0f, -0.35f, 0.0f);


        glVertex3f(-0.5f, -0.35f, 0.0f);
        glVertex3f(-0.4f, -0.5f, 0.0f);
	glEnd();


	//chimney
	glBegin(GL_POLYGON);
        glVertex3f(-0.15f,-0.35f, 0.0f);
        glVertex3f(-0.1f, -0.35f, 0.0f);
        glVertex3f(-0.1f, -0.1f, 0.0f);
        glVertex3f(-0.15f,-0.1f, 0.0f);
	glEnd();

	glBegin(GL_POLYGON);
        glVertex3f(-0.25f,-0.35f, 0.0f);
        glVertex3f(-0.2f, -0.35f, 0.0f);
        glVertex3f(-0.2f, -0.1f, 0.0f);
        glVertex3f(-0.25f,-0.1f, 0.0f);
	glEnd();

	glBegin(GL_POLYGON);
        glVertex3f(-0.35f,-0.35f, 0.0f);
        glVertex3f(-0.3f, -0.35f, 0.0f);
        glVertex3f(-0.3f, -0.1f, 0.0f);
        glVertex3f(-0.35f,-0.1f, 0.0f);
	glEnd();





    glPopMatrix();

	glutSwapBuffers();
}

void update(int value) {

    _move += .004;
    _wave += .009;


    if(_move-0.8 > 1.0)
    {
        _move = -1.0;

    }

	glutPostRedisplay(); //Notify GLUT that the display has changed
	glutTimerFunc(50, update, 0); //Notify GLUT to call update again in 25 milliseconds
}


int main(int argc, char** argv) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
	glutInitWindowSize(800, 800);
	glutCreateWindow("Transformation");
	glutDisplayFunc(drawScene);


	glutTimerFunc(50, update, 0); //Add a timer
	glutMainLoop();
	return 0;
}