#ifdef _WIN32
#include <windows.h>
#endif

#include <GL/gl.h>
#include <GL/glu.h>
#include "example.h"
Example::Example()
{
m_rotationAngle = 0.0f;
}
bool Example::init()
{
glEnable(GL_DEPTH_TEST);
glClearColor(0.5f, 0.5f, 0.5f, 0.5f);
//Return success
return true;
}
void Example::prepare(float dt)
{
const float SPEED = 15.0f;
m_rotationAngle += SPEED * dt;
if (m_rotationAngle > 360.0f)
{
m_rotationAngle -= 360.0f;
}
}
void Example::render()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glRotatef(m_rotationAngle, 0.0f, 0.0f, 1.0f);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-0.5f, -0.5f, -2.0f);
glColor3f(1.0f, 1.0f, 0.0f);
glVertex3f( 0.5f, -0.5f, -2.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f( 0.0f, 0.5f, -2.0f);
glEnd();
38 Chapter 2 n Creating a Simple OpenGL Application}
void Example::shutdown()
{
//Nothing to do here yet
}
void Example::onResize(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, float(width) / float(height), 1.0f, 100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}