Unit cave

Description

Generate a cave using two passes of a cellular automata algorithm and then remove any unreachable areas by floodfilling the map and discarding maps that are less than 39% floor tiles. Stairs are placed on the top level and a connecting stairway is placed on the floor below. If the floor below has a wall tile where the stair should be, that floor is discarded and generated again.

Uses

• SysUtils
• globalutils
• Classes

Overview

Functions and Procedures

procedure fillWithWalls;

procedure randomTileFill;

procedure digCave(floorNumber: byte);

procedure generate(title: string; idNumber: smallint; totalDepth: byte);

function blockORnot(x, y: integer): Tbkinds;

procedure calcDistances(x, y: smallint);

function leftHasFloor(): boolean;

function rightHasFloor(): boolean;

Types

Tbkinds = (...);

TDist = array [1..MAXROWS, 1..MAXCOLUMNS] of integer;

Constants

BLOCKVALUE = 99;

Variables

c: smallint;

distances: TDist;

i: smallint;

iterations: smallint;

r: smallint;

stairX: smallint;

stairY: smallint;

tempArray: array[1..MAXROWS, 1..MAXCOLUMNS] of shortstring;

tempArray2: array[1..MAXROWS, 1..MAXCOLUMNS] of shortstring;

terrainArray: array[1..MAXROWS, 1..MAXCOLUMNS] of shortstring;

tileCounter: smallint;

totalRooms: byte;

Description

Functions and Procedures

procedure fillWithWalls;

Fill array with walls

procedure randomTileFill;

Fill array with random tiles

procedure digCave(floorNumber: byte);

Dig out the cave

procedure generate(title: string; idNumber: smallint; totalDepth: byte);

Generate a caves and place the stairs

function blockORnot(x, y: integer): Tbkinds;

Determines if a tile is a wall or not

procedure calcDistances(x, y: smallint);

Floodfill cave to find unreachable areas

function leftHasFloor(): boolean;

Check that the left side of the map contains floor tiles

function rightHasFloor(): boolean;

Check that the right side of the map contains floor tiles

Types

Tbkinds = (...);

Values bWall bClear

TDist = array [1..MAXROWS, 1..MAXCOLUMNS] of integer;

Constants

BLOCKVALUE = 99;

Variables

c: smallint;

distances: TDist;

i: smallint;

iterations: smallint;

r: smallint;

stairX: smallint;

stairY: smallint;

tempArray: array[1..MAXROWS, 1..MAXCOLUMNS] of shortstring;

tempArray2: array[1..MAXROWS, 1..MAXCOLUMNS] of shortstring;

terrainArray: array[1..MAXROWS, 1..MAXCOLUMNS] of shortstring;

tileCounter: smallint;

totalRooms: byte;

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