wall.cpp

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/*
 * Crossfire -- cooperative multi-player graphical RPG and adventure game
 *
 * Copyright (c) 1999-2013 Mark Wedel and the Crossfire Development Team
 * Copyright (c) 1992 Frank Tore Johansen
 *
 * Crossfire is free software and comes with ABSOLUTELY NO WARRANTY. You are
 * welcome to redistribute it under certain conditions. For details, please
 * see COPYING and LICENSE.
 *
 * The authors can be reached via e-mail at <crossfire@metalforge.org>.
 */
 
#include "global.h"
 
#include <string.h>
 
#include "random_map.h"
#include "rproto.h"
#include <assert.h>
 
int surround_flag(char **layout, int i, int j, RMParms *RP)
{
    int surround_index = 0;
 
    if ((i > 0) && layout[i-1][j] != 0) {
        surround_index |= 1;
    }
    if ((i < RP->Xsize-1) && layout[i+1][j] != 0) {
        surround_index |= 2;
    }
    if ((j > 0) && layout[i][j-1] != 0) {
        surround_index |= 4;
    }
    if ((j < RP->Ysize-1) && layout[i][j+1] != 0) {
        surround_index |= 8;
    }
    return surround_index;
}
 
int surround_flag2(char **layout, int i, int j, RMParms *RP)
{
    int surround_index = 0;
 
    if ((i > 0) && layout[i-1][j] == '#') {
        surround_index |= 1;
    }
    if ((i < RP->Xsize-1) && layout[i+1][j] == '#') {
        surround_index |= 2;
    }
    if ((j > 0) && layout[i][j-1] == '#') {
        surround_index |= 4;
    }
    if ((j < RP->Ysize-1) && layout[i][j+1] == '#') {
        surround_index |= 8;
    }
    return surround_index;
}
 
int surround_flag3(mapstruct *map, int i, int j, RMParms *RP)
{
    int surround_index = 0;
 
    if ((i > 0) && (GET_MAP_MOVE_BLOCK(map, i-1, j)&~MOVE_BLOCK_DEFAULT)) {
        surround_index |= 1;
    }
    if ((i < RP->Xsize-1) && (GET_MAP_MOVE_BLOCK(map, i+1, j)&~MOVE_BLOCK_DEFAULT)) {
        surround_index |= 2;
    }
    if ((j > 0) && (GET_MAP_MOVE_BLOCK(map, i, j-1)&~MOVE_BLOCK_DEFAULT)) {
        surround_index |= 4;
    }
    if ((j < RP->Ysize-1) && (GET_MAP_MOVE_BLOCK(map, i, j+1)&~MOVE_BLOCK_DEFAULT)) {
        surround_index |= 8;
    }
 
    return surround_index;
}
 
int surround_flag4(mapstruct *map, int i, int j, RMParms *RP)
{
    int surround_index = 0;
 
    if ((i > 0) && wall_blocked(map, i-1, j)) {
        surround_index |= 1;
    }
    if ((i < RP->Xsize-1) && wall_blocked(map, i+1, j)) {
        surround_index |= 2;
    }
    if ((j > 0) && wall_blocked(map, i, j-1)) {
        surround_index |= 4;
    }
    if ((j < RP->Ysize-1) && wall_blocked(map, i, j+1)) {
        surround_index |= 8;
    }
 
    return surround_index;
}
 
void make_map_walls(mapstruct *map, char **layout, char *w_style, RMParms *RP)
{
    mapstruct *style_map = NULL;
    object *the_wall;
 
    /* get the style map */
    if (!strcmp(w_style, "none")) {
        return;
    }
    const char *styledirname = "/styles/wallstyles";
    style_map = find_style(styledirname, w_style, -1);
    if (style_map == NULL) {
        return;
    }
 
    /* fill up the map with the given floor style */
    if ((the_wall = pick_random_object(style_map)) != NULL) {
        int i, j;
        char *cp;
        int joinedwalls = 0;
        object *thiswall;
 
        strlcpy(RP->wall_name, the_wall->arch->name, sizeof(RP->wall_name));
        if ((cp = strchr(RP->wall_name, '_')) != NULL) {
            *cp = 0;
            joinedwalls = 1;
        }
 
        for (i = 0; i < RP->Xsize; i++)
            for (j = 0; j < RP->Ysize; j++) {
                if (layout[i][j] == '#') {
                    if (joinedwalls) {
                        thiswall = pick_joined_wall(the_wall, layout, i, j, RP);
                    } else {
                        thiswall = arch_to_object(the_wall->arch);
                    }
                    thiswall->move_block = MOVE_ALL;
                    thiswall->move_allow = 0;
                    object_insert_in_map_at(thiswall, map, thiswall, INS_NO_MERGE|INS_NO_WALK_ON, i, j);
                }
            }
    }
}
 
static const char* wall_join[16] = {
    "_0", "_1_3", "_1_4", "_2_1_2",
    "_1_2", "_2_2_4", "_2_2_1", "_3_1",
    "_1_1", "_2_2_3", "_2_2_2", "_3_3",
    "_2_1_1", "_3_4", "_3_2", "_4"
};
 
object *pick_joined_wall(object *the_wall, char **layout, int i, int j, RMParms *RP)
{
    /* 1 = wall to left,
       2 = wall to right,
       4 = wall above
       8 = wall below */
    int surround_index = 0;
    int l;
    char wall_name[64];
    archetype *wall_arch = NULL;
 
    strncpy(wall_name, the_wall->arch->name, sizeof(wall_name));
 
    /* conventionally, walls are named like this:
     wallname_wallcode, where wallcode indicates
     a joinedness, and wallname is the wall.
     this code depends on the convention for
     finding the right wall. */
 
    /* extract the wall name, which is the text up to the leading _ */
    for (l = 0; l < 64; l++) {
        if (wall_name[l] == '_') {
            wall_name[l] = 0;
            break;
        }
    }
 
    surround_index = surround_flag2(layout, i, j, RP);
    assert(surround_index >= 0 && surround_index < 16);
    strcat(wall_name, wall_join[surround_index]);
 
    wall_arch = try_find_archetype(wall_name);
    if (wall_arch) {
        return arch_to_object(wall_arch);
    } else {
        return arch_to_object(the_wall->arch);
    }
}
 
object *retrofit_joined_wall(mapstruct *the_map, int i, int j, int insert_flag, RMParms *RP)
{
    /* 1 = wall to left,
     * 2 = wall to right,
     * 4 = wall above
     * 8 = wall below
     */
    int surround_index = 0;
    int l;
    object *the_wall = NULL;
    object *new_wall = NULL;
    archetype *wall_arch = NULL;
 
    /* first find the wall */
    FOR_MAP_PREPARE(the_map, i, j, tmp)
    if ((tmp->move_type&MOVE_WALK) && tmp->type != EXIT && tmp->type != TELEPORTER) {
        the_wall = tmp;
        break;
    }
    FOR_MAP_FINISH();
 
    /* if what we found is a door, don't remove it, set the_wall to NULL to
     * signal that later.
     */
    if (the_wall && (the_wall->type == DOOR || the_wall->type == LOCKED_DOOR)) {
        the_wall = NULL;
        /* if we're not supposed to insert a new wall where there wasn't one,
         * we've gotta leave.
         */
        if (insert_flag == 0) {
            return NULL;
        }
    } else if (the_wall == NULL) {
        return NULL;
    }
 
    /* canonicalize the wall name */
    for (l = 0; l < 64; l++) {
        if (RP->wall_name[l] == '_') {
            RP->wall_name[l] = 0;
            break;
        }
    }
 
    surround_index = surround_flag4(the_map, i, j, RP);
    assert(surround_index >= 0 && surround_index < 16);
    strcat(RP->wall_name, wall_join[surround_index]);
    wall_arch = try_find_archetype(RP->wall_name);
    if (wall_arch != NULL) {
        new_wall = arch_to_object(wall_arch);
        if (the_wall && the_wall->map) {
            object_remove(the_wall);
            object_free_drop_inventory(the_wall);
        }
        the_wall->move_block = MOVE_ALL;
        object_insert_in_map_at(new_wall, the_map, new_wall, INS_NO_MERGE|INS_NO_WALK_ON, i, j);
    }
    return new_wall;
}