eobish: src/player.c annotate

eobish

mostly works

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 18 Jan 2015 13:30:30 +0200
parents
children

rev	line source
nuclear@4	1 #include <stdio.h>
nuclear@4	2 #include "player.h"
nuclear@4	3 #include "level.h"
nuclear@4	4
nuclear@4	5 static char *dirnames[] = {
nuclear@4	6 "north", "east", "south", "west"
nuclear@4	7 };
nuclear@4	8
nuclear@4	9 void player_init(struct player p, struct level lvl)
nuclear@4	10 {
nuclear@4	11 p->x = lvl->start_pos[0];
nuclear@4	12 p->y = lvl->start_pos[1];
nuclear@4	13 p->lvl = lvl;
nuclear@4	14 p->dir = DIR_NORTH;
nuclear@4	15 }
nuclear@4	16
nuclear@4	17 int player_move(struct player *p, int dfwd, int dside)
nuclear@4	18 {
nuclear@4	19 int nx, ny;
nuclear@4	20 int dx, dy;
nuclear@4	21
nuclear@4	22 player_dir_vec(p, &dx, &dy);
nuclear@4	23 nx = p->x + dx * dfwd - dy * dside;
nuclear@4	24 ny = p->y + dy * dfwd + dx * dside;
nuclear@4	25
nuclear@4	26 if(level_cell(p->lvl, nx, ny) == '#') {
nuclear@4	27 return -1;
nuclear@4	28 }
nuclear@4	29 p->x = nx;
nuclear@4	30 p->y = ny;
nuclear@4	31 return 0;
nuclear@4	32 }
nuclear@4	33
nuclear@4	34 void player_turn(struct player *p, int angle)
nuclear@4	35 {
nuclear@4	36 int dir = (p->dir + angle) % 4;
nuclear@4	37 if(dir < 0) dir += 4;
nuclear@4	38
nuclear@4	39 printf("turn(%d): %s -> %s\n", angle, dirnames[p->dir], dirnames[dir]);
nuclear@4	40 p->dir = dir;
nuclear@4	41 }
nuclear@4	42
nuclear@4	43 void player_dir_vec(struct player p, int dx, int *dy)
nuclear@4	44 {
nuclear@4	45 *dx = p->dir == DIR_EAST ? 1 : (p->dir == DIR_WEST ? -1 : 0);
nuclear@4	46 *dy = p->dir == DIR_NORTH ? -1 : (p->dir == DIR_SOUTH ? 1 : 0);
nuclear@4	47 }