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/*
* screen_quake.c: Τɤ餹
*
* Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
* 1998- <masaki-c@is.aist-nara.ac.jp>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* $Id: screen_quake.c,v 1.1 2003/04/22 16:29:52 chikama Exp $ */
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <glib.h>
#include "portab.h"
#include "system.h"
// #include "LittleEndian.h"
#include "ags.h"
#include "imput.h"
#include "sact.h"
#include "surface.h"
#include "ngraph.h"
#include "sprite.h"
#include "counter.h"
#include "randMT.h"
typedef void entrypoint (double step, int p1, int p2, int *retx, int *rety);
// 岼ɤ餷
static void quake0(double step, int ampx, int ampy, int *adjx, int *adjy) {
static int i = 0;
*adjx = (int)(genrand() * ampx/2);
*adjy = (int)(genrand() * ampy/2);
*adjx *= ((-1)*(i%2) + ((i+1)%2));
*adjy *= ((-1)*((i+1)%2) + (i%2));
i++;
}
// žɤ餷
static void quake1(double curstep, int diam, int round, int *adjx, int *adjy) {
double R = (1 - curstep) * diam / 2;
double th = curstep * 2 * M_PI * round;
*adjx = (int)(R * cos(th));
*adjy = (int)(R * sin(th));
}
/*
ɤ餷
@param wType: 0=IJ, 1:ž
@param wParam1: wType=0ΤȤxο
wType=1ΤȤ
@param wParam2: wType=0ΤȤyο
wType=1ΤȤž
@param wCount: (1/100)
@param nfKeyEnable: ȴ (1ͭ)
*/
int sp_quake_screen(int type, int p1, int p2, int time, int cancel) {
int sttime, edtime, curtime;
int key;
entrypoint *cb[2] = {quake0, quake1};
if (type > 1) return OK;
sttime = get_high_counter(SYSTEMCOUNTER_MSEC);
edtime = time * 10 + sttime;
while ((curtime = get_high_counter(SYSTEMCOUNTER_MSEC)) < edtime) {
int adjx, adjy;
cb[type]((double)(curtime - sttime)/(edtime - sttime), p1, p2, &adjx, &adjy);
ags_setViewArea(adjx, adjy, sf0->width, sf0->height);
ags_updateFull();
key = sys_keywait(10, cancel);
if (cancel && key) break;
}
ags_setViewArea(0, 0, sf0->width, sf0->height);
ags_updateFull();
return OK;
}
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