engine.c

著名物理引擎Hawk的源代码

/* engine.c, HAWK game engine
 *
 * Copyright 1997-1998 by Phil Frisbie, Jr.
 * for Hawk Software
 *
 */

#include "hawk.h"
#include "internal.h"

#define E_FADEIN	30

void engUpdate(void)
{
	static int	starttime = 0;
	float		scale;

	if(Engine.stopping)
		Engine.running = FALSE;

	if(Engine.starting)
	{
		int	frames, i;

		if(!starttime)
			starttime = Engine.gameframes;
		frames = Engine.gameframes - starttime;
		frames = MAX(1, frames);	/* cannot have 0 */
		scale = (float)frames/E_FADEIN;
		if((frames)>E_FADEIN)
		{
			Engine.starting = FALSE;
			scale = 1.0;
			starttime = 0;
		}
		for(i=0;i<GLevel.nview;i++)
			GLevel.view[i]->scaling = scale;
	}
}