114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
/*
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Copyright (C) 2018 Parallel Realities
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "util.h"
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static char TIME_STRING[MAX_NAME_LENGTH];
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int collision(int x1, int y1, int w1, int h1, int x2, int y2, int w2, int h2)
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{
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return (MAX(x1, x2) < MIN(x1 + w1, x2 + w2)) && (MAX(y1, y2) < MIN(y1 + h1, y2 + h2));
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}
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int lineLineIntersection(int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4)
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{
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int d, n1, n2, ua, ub;
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d = ((y4 - y3) * (x2 - x1)) - ((x4 - x3) * (y2 - y1));
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n1 = ((x4 - x3) * (y1 - y3)) - ((y4 - y3) * (x1 - x3));
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n2 = ((x2 - x1) * (y1 - y3)) - ((y2 - y1) * (x1 - x3));
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if (d == 0)
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{
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if ( n1 == 0 && n2 == 0)
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{
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return 0;
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}
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return 0;
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}
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ua = n1 / d;
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ub = n2 / d;
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return (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1);
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}
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int lineRectIntersection(int x1, int y1, int x2, int y2, SDL_Rect *r)
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{
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return (
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lineLineIntersection(x1, y1, x2, y2, r->x, r->y, r->x + r->w, r->y) || /* top */
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lineLineIntersection(x1, y1, x2, y2, r->x, r->y + r->h, r->x + r->w, r->y + r->h) || /* bottom */
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lineLineIntersection(x1, y1, x2, y2, r->x, r->y, r->x, r->y + r->h) || /* left */
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lineLineIntersection(x1, y1, x2, y2, r->x + r->w, r->y, r->x + r->w, r->y + r->h) /* right */
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);
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}
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char *timeToString(int seconds, int showHours)
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{
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int hours, minutes;
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/* max out at 99h 59m 59s */
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seconds = MIN(seconds, (100 * 60 * 60) - 1);
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hours = seconds / (FPS * FPS);
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minutes = (seconds / FPS) % FPS;
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seconds %= FPS;
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if (showHours)
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{
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sprintf(TIME_STRING, "%dh %02dm %02ds", hours, minutes, seconds);
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}
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else
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{
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sprintf(TIME_STRING, "%dm %02ds", minutes, seconds);
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}
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return TIME_STRING;
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}
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char *timeToDate(long millis)
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{
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static char DATE[MAX_NAME_LENGTH];
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struct tm *timeinfo;
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timeinfo = localtime(&millis);
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strftime(DATE, MAX_NAME_LENGTH, "%d %b %Y, %I:%M%p", timeinfo);
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return DATE;
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}
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void *resize(void *array, int oldSize, int newSize)
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{
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void **newArray;
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int copySize;
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copySize = newSize > oldSize ? oldSize : newSize;
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newArray = malloc(newSize);
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memset(newArray, 0, newSize);
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memcpy(newArray, array, copySize);
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free(array);
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return newArray;
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}
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