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#include <string.h>
#include <math.h>
#include <stdlib.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/gl.h>
#include "main/foghandler.h"
#include "exception.h"
#include "demolib_prefs.h"
#ifndef M_PI
#define M_PI 3.141592653589793238462643383279502
#endif
#if DEMOLIB_MAINLOOP
FogHandler::FogHandler(MainLoop *ml, const char *title, const char *elem, Hashtable *attr) :
Event(ml, title, elem, attr, "start:end:r:g:b:a")
{
}
FogHandler::~FogHandler()
{
}
void FogHandler::start_effect()
{
glEnable(GL_FOG);
glHint(GL_FOG_HINT, GL_FASTEST);
glFogi(GL_FOG_MODE, GL_LINEAR);
}
void FogHandler::draw_scene(float progress)
{
GLfloat fog_color[] = {
this->get_val("r", progress),
this->get_val("g", progress),
this->get_val("b", progress),
this->get_val("a", progress)
};
glFogf(GL_FOG_START, this->get_val("start", progress));
glFogf(GL_FOG_END, this->get_val("end", progress));
glFogfv(GL_FOG_COLOR, fog_color);
}
void FogHandler::end_effect()
{
glDisable(GL_FOG);
}
#endif
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