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levelGenerator.js
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/**
Generates a psuedo-random procedural level.
Code by Rob Kleffner, 2011
*/
Mario.LevelGenerator = function(width, height) {
this.Width = width;
this.Height = height;
this.Odds = [];
this.TotalOdds = 0;
this.Difficulty = 0;
this.Type = 0;
};
Mario.LevelGenerator.prototype = {
CreateLevel: function(type, difficulty) {
var i = 0, length = 0, floor = 0, x = 0, y = 0, ceiling = 0, run = 0, level = null;
this.Type = type;
this.Difficulty = difficulty;
this.Odds[Mario.Odds.Straight] = 20;
this.Odds[Mario.Odds.HillStraight] = 10;
this.Odds[Mario.Odds.Tubes] = 2 + difficulty;
this.Odds[Mario.Odds.Jump] = 2 * difficulty;
this.Odds[Mario.Odds.Cannon] = -10 + 5 * difficulty;
if (this.Type !== Mario.LevelType.Overground) {
this.Odds[Mario.Odds.HillStraight] = 0;
}
for (i = 0; i < this.Odds.length; i++) {
if (this.Odds[i] < 0) {
this.Odds[i] = 0;
}
this.TotalOdds += this.Odds[i];
this.Odds[i] = this.TotalOdds - this.Odds[i];
}
level = new Mario.Level(this.Width, this.Height);
length += this.BuildStraight(level, 0, level.Width, true);
while (length < level.Width - 64) {
length += this.BuildZone(level, length, level.Width - length);
}
floor = this.Height - 1 - (Math.random() * 4) | 0;
level.ExitX = length + 8;
level.ExitY = floor;
for (x = length; x < level.Width; x++) {
for (y = 0; y < this.Height; y++) {
if (y >= floor) {
level.SetBlock(x, y, 1 + 9 * 16);
}
}
}
if (type === Mario.LevelType.Castle || type === Mario.LevelType.Underground) {
for (x = 0; x < level.Width; x++) {
if (run-- <= 0 && x > 4) {
ceiling = (Math.random() * 4) | 0;
run = ((Math.random() * 4) | 0) + 4;
}
for (y = 0; y < level.Height; y++) {
if ((x > 4 && y <= ceiling) || x < 1) {
level.SetBlock(x, y, 1 + 9 * 16);
}
}
}
}
this.FixWalls(level);
return level;
},
BuildZone: function(level, x, maxLength) {
var t = (Math.random() * this.TotalOdds) | 0, type = 0, i = 0;
for (i = 0; i < this.Odds.length; i++) {
if (this.Odds[i] <= t) {
type = i;
}
}
switch (type) {
case Mario.Odds.Straight:
return this.BuildStraight(level, x, maxLength, false);
case Mario.Odds.HillStraight:
return this.BuildHillStraight(level, x, maxLength);
case Mario.Odds.Tubes:
return this.BuildTubes(level, x, maxLength);
case Mario.Odds.Jump:
return this.BuildJump(level, x, maxLength);
case Mario.Odds.Cannons:
return this.BuildCannons(level, x, maxLength);
}
return 0;
},
BuildJump: function(level, xo, maxLength) {
var js = ((Math.random() * 4) | 0) + 2, jl = ((Math.random() * 2) | 0) + 2, length = js * 2 + jl, x = 0, y = 0,
hasStairs = ((Math.random() * 3) | 0) === 0, floor = this.Height - 1 - ((Math.random() * 4) | 0);
for (x = xo; x < xo + length; x++) {
if (x < xo + js || x > xo + length - js - 1) {
for (y = 0; y < this.Height; y++) {
if (y >= floor) {
level.SetBlock(x, y, 1 + 9 * 16);
} else if (hasStairs) {
if (x < xo + js) {
if (y >= floor - (x - xo) + 1) {
level.SetBlock(x, y, 9);
}
} else {
if (y >= floor - ((xo + length) - x) + 2) {
level.SetBlock(x, y, 9);
}
}
}
}
}
}
return length;
},
BuildCannons: function(level, xo, maxLength) {
alert("cannons");
var length = ((Math.random() * 10) | 0) + 2, floor = this.Height - 1 - (Math.random() * 4) | 0,
xCannon = xo + 1 + (Math.random() * 4) | 0, x = 0, y = 0, cannonHeight = 0;
if (length > maxLength) {
length = maxLength;
}
for (x = xo; x < xo + length; x++) {
if (x > xCannon) {
xCannon += 2 * (Math.random() * 4) | 0;
}
if (xCannon === xo + length - 1) {
xCannon += 10;
}
cannonHeight = floor - ((Math.random() * 4) | 0) - 1;
for (y = 0; y < this.Height; y++) {
if (y >= floor) {
level.SetBlock(x, y, 1 + 9 * 16);
} else {
if (x === xCannon && y >= cannonHeight) {
if (y === cannonHeight) {
level.SetBlock(x, y, 14);
} else if (y === cannonHeight + 1) {
level.SetBlock(x, y, 14 + 16);
} else {
level.SetBlock(x, y, 14 + 2 * 16);
}
}
}
}
}
return length;
},
BuildHillStraight: function(level, xo, maxLength) {
var length = ((Math.random() * 10) | 0) + 10, floor = this.Height - 1 - (Math.random() * 4) | 0,
x = 0, y = 0, h = floor, keepGoing = true, l = 0, xxo = 0, occupied = [], xx = 0, yy = 0;
if (length > maxLength) {
length = maxLength;
}
for (x = xo; x < xo + length; x++) {
for (y = 0; y < this.Height; y++) {
if (y >= floor) {
level.SetBlock(x, y, 1 + 9 * 16);
}
}
}
this.AddEnemyLine(level, xo + 1, xo + length - 1, floor - 1);
while (keepGoing) {
h = h - 2 - (Math.random() * 3) | 0;
if (h <= 0) {
keepGoing = false;
} else {
l = ((Math.random() * 5) | 0) + 3;
xxo = ((Math.random() * (length - l - 2)) | 0) + xo + 1;
if (occupied[xxo - xo] || occupied[xxo - xo + l] || occupied[xxo - xo - 1] || occupied[xxo - xo + l + 1]) {
keepGoing = false;
} else {
occupied[xxo - xo] = true;
occupied[xxo - xo + l] = true;
this.AddEnemyLine(level, xxo, xxo + l, h - 1);
if (((Math.random() * 4) | 0) === 0) {
this.Decorate(level, xxo - 1, xxo + l + 1, h);
keepGoing = false;
}
for (x = xxo; x < xxo + l; x++) {
for (y = h; y < floor; y++) {
xx = 5;
yy = 9;
if (x === xxo) {
xx = 4;
}
if (x === xxo + l - 1) {
xx = 6;
}
if (y === h) {
yy = 8;
}
if (level.GetBlock(x, y) === 0) {
level.SetBlock(x, y, xx + yy * 16);
} else {
if (level.GetBlock(x, y) === (4 + 8 * 16)) {
level.SetBlock(x, y, 4 + 11 * 16);
}
if (level.GetBlock(x, y) === (6 + 8 * 16)) {
level.SetBlock(x, y, 6 + 11 * 16);
}
}
}
}
}
}
}
return length;
},
AddEnemyLine: function(level, x0, x1, y) {
var x = 0, type = 0;
for (x = x0; x < x1; x++) {
if (((Math.random() * 35) | 0) < this.Difficulty + 1) {
type = (Math.random() * 4) | 0;
if (this.Difficulty < 1) {
type = Mario.Enemy.Goomba;
} else if (this.Difficulty < 3) {
type = (Math.random() * 3) | 0;
}
level.SetSpriteTemplate(x, y, new Mario.SpriteTemplate(type, ((Math.random() * 35) | 0) < this.Difficulty));
}
}
},
BuildTubes: function(level, xo, maxLength) {
var length = ((Math.random() * 10) | 0) + 5, floor = this.Height - 1 - (Math.random() * 4) | 0,
xTube = xo + 1 + (Math.random() * 4) | 0, tubeHeight = floor - ((Math.random() * 2) | 0) - 2,
x = 0, y = 0, xPic = 0;
if (length > maxLength) {
length = maxLength;
}
for (x = xo; x < xo + length; x++) {
if (x > xTube + 1) {
xTube += 3 + ((Math.random() * 4) | 0);
tubeHeight = floor - ((Math.random() * 2) | 0) - 2;
}
if (xTube >= xo + length - 2) {
xTube += 10;
}
if (x === xTube && ((Math.random() * 11) | 0) < this.Difficulty + 1) {
level.SetSpriteTemplate(x, tubeHeight, new Mario.SpriteTemplate(Mario.Enemy.Flower, false));
}
for (y = 0; y < this.Height; y++) {
if (y >= floor) {
level.SetBlock(x, y, 1 + 9 * 16);
} else {
if ((x === xTube || x === xTube + 1) && y >= tubeHeight) {
xPic = 10 + x - xTube;
if (y === tubeHeight) {
level.SetBlock(x, y, xPic);
} else {
level.SetBlock(x, y, xPic + 16);
}
}
}
}
}
return length;
},
BuildStraight: function(level, xo, maxLength, safe) {
var length = ((Math.random() * 10) | 0) + 2, floor = this.Height - 1 - ((Math.random() * 4) | 0), x = 0, y = 0;
if (safe) {
length = 10 + ((Math.random() * 5) | 0);
}
if (length > maxLength) {
length = maxLength;
}
for (x = xo; x < xo + length; x++) {
for (y = 0; y < this.Height; y++) {
if (y >= floor) {
level.SetBlock(x, y, 1 + 9 * 16);
}
}
}
if (!safe) {
if (length > 5) {
this.Decorate(level, xo, xo + length, floor);
}
}
return length;
},
Decorate: function(level, x0, x1, floor) {
if (floor < 1) {
return;
}
var rocks = true, s = (Math.random() * 4) | 0, e = (Math.random() * 4) | 0, x = 0;
this.AddEnemyLine(level, x0 + 1, x1 - 1, floor - 1);
if (floor - 2 > 0) {
if ((x1 - 1 - e) - (x0 + 1 + s) > 1) {
for (x = x0 + 1 + s; x < x1 - 1 - e; x++) {
level.SetBlock(x, floor - 2, 2 + 2 * 16);
}
}
}
s = (Math.random() * 4) | 0;
e = (Math.random() * 4) | 0;
if (floor - 4 > 0) {
if ((x1 - 1 - e) - (x0 + 1 + s) > 2) {
for (x = x0 + 1 + s; x < x1 - 1 - e; x++) {
if (rocks) {
if (x !== x0 + 1 && x !== x1 - 2 && ((Math.random() * 3) | 0) === 0) {
if (((Math.random() * 4) | 0) === 0) {
level.SetBlock(x, floor - 4, 4 + 2 + 16);
} else {
level.SetBlock(x, floor - 4, 4 + 1 + 16);
}
} else if (((Math.random() * 4) | 0) === 0) {
if (((Math.random() * 4) | 0) === 0) {
level.SetBlock(x, floor - 4, 2 + 16);
} else {
level.SetBlock(x, floor - 4, 1 + 16);
}
} else {
level.SetBlock(x, floor - 4, 16);
}
}
}
}
}
},
FixWalls: function(level) {
var blockMap = [], x = 0, y = 0, xx = 0, yy = 0, blocks = 0;
for (x = 0; x < this.Width + 1; x++) {
blockMap[x] = [];
for (y = 0; y < this.Height + 1; y++) {
blocks = 0;
for (xx = x - 1; xx < x + 1; xx++) {
for (yy = y - 1; yy < y + 1; yy++) {
if (level.GetBlockCapped(xx, yy) === (1 + 9 * 16)) {
blocks++;
}
}
}
blockMap[x][y] = blocks === 4;
}
}
this.Blockify(level, blockMap, this.Width + 1, this.Height + 1);
},
Blockify: function(level, blocks, width, height) {
var to = 0, b = [], x = 0, y = 0, xx = 0, yy = 0, i = 0, _xx = 0, _yy = 0;
for (i = 0; i < 2; i++) {
b[i] = [];
}
if (this.Type === Mario.LevelType.Castle) {
to = 8;
} else if (this.Type === Mario.LevelType.Underground) {
to = 12;
}
for (x = 0; x < width; x++) {
for (y = 0; y < height; y++) {
for (xx = x; xx <= x + 1; xx++) {
for (yy = y; yy <= y + 1; yy++) {
_xx = xx;
_yy = yy;
if (_xx < 0) {
_xx = 0;
}
if (_yy < 0) {
_yy = 0;
}
if (_xx > width - 1) {
_xx = width - 1;
}
if (_yy > height - 1) {
_yy = height - 1;
}
b[xx - x][yy - y] = blocks[_xx][_yy];
}
}
if (b[0][0] === b[1][0] && b[0][1] === b[1][1]) {
if (b[0][0] === b[0][1]) {
if (b[0][0]) {
level.SetBlock(x, y, 1 + 9 * 16 + to);
}
} else {
if (b[0][0]) {
level.SetBlock(x, y, 1 + 10 * 16 + to);
} else {
level.SetBlock(x, y, 1 + 8 * 16 + to);
}
}
} else if (b[0][0] === b[0][1] && b[1][0] === b[1][1]) {
if (b[0][0]) {
level.SetBlock(x, y, 2 + 9 * 16 + to);
} else {
level.SetBlock(x, y, 9 * 16 + to);
}
} else if (b[0][0] === b[1][1] && b[0][1] === b[1][0]) {
level.SetBlock(x, y, 1 + 9 * 16 + to);
} else if (b[0][0] === b[1][0]) {
if (b[0][0]) {
if (b[0][1]) {
level.SetBlock(x, y, 3 + 10 * 16 + to);
} else {
level.SetBlock(x, y, 3 + 11 * 16 + to);
}
} else {
if (b[0][1]) {
level.SetBlock(x, y, 2 + 8 * 16 + to);
} else {
level.SetBlock(x, y, 8 * 16 + to);
}
}
} else if (b[0][1] === b[1][1]) {
if (b[0][1]) {
if (b[0][0]) {
level.SetBlock(x, y, 3 + 9 * 16 + to);
} else {
level.SetBlock(x, y, 3 + 8 * 16 + to);
}
} else {
if (b[0][0]) {
level.SetBlock(x, y, 2 + 10 * 16 + to);
} else {
level.SetBlock(x, y, 10 * 16 + to);
}
}
} else {
level.SetBlock(x, y, 1 + 16 * to);
}
}
}
}
};