view xrogue/outside.c @ 223:0e99eade579c

Generate text documentation from the troff source files. This is done by make, in the 'docs' target, which is now part of the normal build process. Unfortunately, not all the games include troff sources. Getting decent HTML output from groff is still a difficult process which will not be attempted at this time. There are a few bugs in the 'install' and 'uninstall' rules. Not to mention that the documentation is sometimes inaccurate.
author John "Elwin" Edwards
date Sun, 21 Feb 2016 20:47:12 -0500
parents e6179860cb76
children f54901b9c39b
line wrap: on
line source

/*
    outside.c  -  functions for dealing with the "outside" level

    XRogue: Expeditions into the Dungeons of Doom
    Copyright (C) 1991 Robert Pietkivitch
    All rights reserved.
    
    Based on "Advanced Rogue"
    Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
    All rights reserved.

    See the file LICENSE.TXT for full copyright and licensing information.
*/

#include <curses.h>
#include "rogue.h"

extern char rnd_terrain(), get_terrain();

/*
 * init_terrain:
 *      Get the single "outside room" set up correctly
 */

void
init_terrain()
{
    register struct room *rp;

    for (rp = rooms; rp < &rooms[MAXROOMS]; rp++) {
            rp->r_flags = ISGONE;       /* kill all rooms */
            rp->r_fires = NULL;         /* no fires */
    }
    rp = &rooms[0];                     /* point to only room */
    rp->r_flags = ISDARK;               /* outside is always dark */
    rp->r_pos.x = 0;                    /* room fills whole screen */
    rp->r_pos.y = 1;
    rp->r_max.x = cols;
    rp->r_max.y = lines - 3;
}

void
do_terrain(basey, basex, deltay, deltax, fresh)
int basey, basex, deltay, deltax;
bool fresh;
{
    register int cury, curx;        /* Current y and x positions */

    /* Lay out the boundary */
    for (cury=1; cury<lines-2; cury++) {        /* Vertical "walls" */
        mvaddch(cury, 0, VERTWALL);
        mvaddch(cury, cols-1, VERTWALL);
    }
    for (curx=0; curx<cols; curx++) {           /* Horizontal "walls" */
        mvaddch(1, curx, HORZWALL);
        mvaddch(lines-3, curx, HORZWALL);
    }

    /* If we are not continuing, let's start out with a line of terrain */
    if (fresh) {
        char ch;        /* Next char to add */

        /* Move to the starting point (should be (1, 0)) */
        move(basey, basex);
        curx = basex;

        /* Start with some random terrain */
        if (basex == 0) {
            ch = rnd_terrain();
            addch(ch);
        }
        else ch = mvinch(basey, basex);

        curx += deltax;

        /* Fill in the rest of the line */
        while (curx > 0 && curx < cols-1) {
            /* Put in the next piece */
            ch = get_terrain(ch, '\0', '\0', '\0');
            mvaddch(basey, curx, ch);
            curx += deltax;
        }

        basey++;        /* Advance to next line */
    }

    /* Fill in the rest of the lines */
    cury = basey;
    while (cury > 1 && cury < lines - 3) {
        curx = basex;
        while (curx > 0 && curx < cols-1) {
            register char left, top_left, top, top_right;
            register int left_pos, top_pos;

            /* Get the surrounding terrain */
            left_pos = curx - deltax;
            top_pos = cury - deltay;

            left = mvinch(cury, left_pos);
            top_left = mvinch(top_pos, left_pos);
            top = mvinch(top_pos, curx);
            top_right = mvinch(top_pos, curx + deltax);

            /* Put the piece of terrain on the map */
            mvaddch(cury, curx, get_terrain(left, top_left, top, top_right));

            /* Get the next x coordinate */
            curx += deltax;
        }

        /* Get the next y coordinate */
        cury += deltay;
    }
        /* The deeper we go.. */
        if (level > 40)         genmonsters(20, (bool) 0);
        else if (level > 10)    genmonsters(15, (bool) 0);
        else                    genmonsters(10, (bool) 0);

        /* sometimes they're real angry */
        if (rnd(100) < 65) {
            /* protect good guys */
            if (player.t_ctype == C_PALADIN ||
                player.t_ctype == C_RANGER  || player.t_ctype == C_MONK) {
                    aggravate(TRUE, FALSE);
            }
            else {
                aggravate(TRUE, TRUE);
            }
        }
}

/*
 * do_paths:
 *      draw at least a single path-way through the terrain
 */

/*
 * rnd_terrain:
 *      return a weighted, random type of outside terrain
 */

char
rnd_terrain()
{
    int chance = rnd(100);

    /* Meadow is most likely */
    if (chance < 40) return(FLOOR);

    /* Next comes forest */
    if (chance < 65) return(FOREST);

    /* Then comes lakes */
    if (chance < 85) return(POOL);

    /* Finally, mountains */
    return(WALL);
}


/*
 * get_terrain:
 *      return a terrain weighted by what is surrounding
 */

char
get_terrain(one, two, three, four)
char one, two, three, four;
{
    register int i;
    int forest = 0, mountain = 0, lake = 0, meadow = 0, total = 0;
    char surrounding[4];

    surrounding[0] = one;
    surrounding[1] = two;
    surrounding[2] = three;
    surrounding[3] = four;

    for (i=0; i<4; i++) 
        switch (surrounding[i]) {
            case FOREST:
                forest++;
                total++;
            
            when WALL:
                mountain++;
                total++;

            when POOL:
                lake++;
                total++;

            when FLOOR:
                meadow++;
                total++;
        }

    /* Should we continue mountain? */
    if (rnd(total+1) < mountain) return(WALL);

    /* Should we continue lakes? */
    if (rnd(total+1) < lake) return(POOL);

    /* Should we continue meadow? */
    if (rnd(total+1) < meadow) return(FLOOR);

    /* Should we continue forest? */
    if (rnd(total+2) < forest) return(FOREST);

    /* Return something random */
    return(rnd_terrain());
}

/*
 * lake_check:
 *      Determine if the player would drown
 */

/*UNUSED*/
/* void
 * lake_check(place)
 * register coord *place;
 * {
 * }
 */