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#include <GL/glut.h>
#include <stdlib.h>
#include <windows.h>
#include <iostream>
float force = .1; // kgm^-1/frame
class Ball
{
private:
double mass;
double Ymomentum;
double Xmomentum;
public:
double x;
double y;
double z;
Ball();
void UpdateFrame();
void AdjustYMomentum(float amount);
void AdjustXMomentum(float amount);
};
Ball::Ball()
{
x = 0;
y = -6;
z = 0;
mass = 30;
Ymomentum = 0;
Xmomentum = 0;
}
void Ball::UpdateFrame()
{
double Yvelocity = Ymomentum / mass;
double Xvelocity = Xmomentum / mass;
y += Yvelocity;
x += Xvelocity;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3d(1,0,0);
glPushMatrix();
glTranslated(x,z,y);
glRotated(60,1,0,0);
glRotated(0,0,0,1);
glutSolidSphere(1,32,32);
glPopMatrix();
glutSwapBuffers();
}
void Ball::AdjustYMomentum(float amount)
{
Ymomentum += amount;
}
void Ball::AdjustXMomentum(float amount)
{
Xmomentum += amount;
}
Ball mainball;
/* GLUT callback Handlers */
static void resize(int width, int height)
{
const float ar = (float) width / (float) height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-ar, ar, -1.0, 1.0,2, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity() ;
}
static void display(void)
{
mainball.UpdateFrame();
Sleep(33);
}
static void key(unsigned char key, int x, int y)
{
switch (key)
{
case 's':
{
mainball.AdjustYMomentum(force);
break;
}
case 'w':
{
mainball.AdjustYMomentum(-force);
break;
}
case 'd':
{
mainball.AdjustXMomentum(force);
break;
}
case 'a':
{
mainball.AdjustXMomentum(-force);
break;
}
case 'z':
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(mainball.x,5, mainball.y+5,mainball.x,mainball.z,mainball.y,0,1,0);
break;
}
break;
}
glutPostRedisplay();
}
static void idle(void)
{
glutPostRedisplay();
}
const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };
const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };
/* Program entry point */
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitWindowSize(640,480);
glutInitWindowPosition(10,10);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("GLUT Shapes");
glutReshapeFunc(resize);
glutDisplayFunc(display);
glutKeyboardFunc(key);
glutIdleFunc(idle);
glClearColor(1,1,1,1);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LIGHTING);
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
glutMainLoop();
return EXIT_SUCCESS;
}
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