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Update betterterrain.js
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@TheGreatRambler
TheGreatRambler authored Jan 10, 2018
1 parent 850436a commit c7ca7ce
Showing 1 changed file with 70 additions and 21 deletions.
91 changes: 70 additions & 21 deletions betterterrain.js
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Original file line number Diff line number Diff line change
Expand Up @@ -28,49 +28,65 @@ c(b);0>a.s2&&(a.s2+=1);c=null}})();
if (typeof options === "undefined") {
options = {};
}

if (typeof options.seed === "undefined") {
// seed is a number
options.seed = Math.random();
}

if (typeof options.freq === "undefined") {
options.freq = 10;
}
if (typeof options.defaultcolor === "undefined") {
options.defaultcolor = "#FFFFFF";
}

if (typeof options.defaultbiomechance === "undefined") {
options.defaultbiomechance = 80;
}

if (typeof options.biomes === "undefined") {
options.onlyheight = true;
}

if (typeof options.onlyheight === "undefined") {
options.onlyheight = false;
}

if (typeof options.biomemap === "undefined") {
options.onlyheight = true;
}

if (typeof options.initialripple === "undefined") {
options.initialripple = 1;
}

if (typeof options.continentmult === "undefined") {
options.continentmult = 2;
}

if (typeof options.continentfreq === "undefined") {
options.continentfreq = 10;
}

if (typeof options.moisturefreq === "undefined") {
options.moisturefreq = 2;
}

if (typeof options.exponent === "undefined") {
options.exponent = 2;
}

if (typeof options.invert === "undefined") {
options.invert = true;
}

if (typeof options.moistureweight === "undefined") {
options.moistureweight = 1;
}

if (typeof options.structures === "undefined") {
options.structuresgen = false;
} else {
options.structuresgen = true;
}

this.rng = new betterterrainhf.alea(options.seed);

Expand All @@ -81,6 +97,17 @@ c(b);0>a.s2&&(a.s2+=1);c=null}})();
this.dataarray = [];
this.options = options;
}

betterterrainhf.getindex = function(x, y) {
// Elegant Pairing Function (Szudzik)
var xx = x >= 0 ? x * 2 : x * -2 - 1;
var yy = y >= 0 ? y * 2 : y * -2 - 1;
return (xx >= yy) ? (xx * xx + xx + yy) : (yy * yy + xx);
};

betterterrainhf.getrandomnumber = function(min, max, randnum) {
return Math.floor(randnum * (max - min + 1)) + min;
};

betterterrain.prototype.getchancefunc = function(x, y) {
var specificnum = betterterrainhf.getindex(x, y);
Expand All @@ -89,15 +116,35 @@ c(b);0>a.s2&&(a.s2+=1);c=null}})();
return randnumgen.next;
}

betterterrainhf.getindex = function(x, y) {
// Elegant Pairing Function (Szudzik)
var xx = x >= 0 ? x * 2 : x * -2 - 1;
var yy = y >= 0 ? y * 2 : y * -2 - 1;
return (xx >= yy) ? (xx * xx + xx + yy) : (yy * yy + xx);
betterterrain.prototype._initxy = function(x, y) {
if (typeof this.dataarray[betterterrainhf.getindex(x, y)] === "undefined") {
this.dataarray[betterterrainhf.getindex(x, y)] = {};
}
};

betterterrain.prototype.initxy = function(x, y) {
this.dataarray[betterterrainhf.getindex(x, y)] = {};

betterterrain.prototype.generatestructures = function(x, y) {
if (typeof this.dataarray[betterterrainhf.getindex(x, y)].s === "undefined") {
var biomedata = this.options.biomes[this.dataarray[betterterrainhf.getindex(x, y)].b];
if (typeof biomedata.structures !== "undefined") {
var chancefunction = this.getchancefunc(x, y);
var choiceitemindex = betterterrainhf.getrandomnumber(0, biomedata.structures.length - 1, chancefunction());
var chosenstructure = biomedata.structures[choiceitemindex];
if (chancefunction() < (chosenstructure.chance / 100) * biomedata.structures.length) {
var data = this.options.structures[chosenstructure.name].data();
var width = data[0].length;
var height = data.length;
for (var f = 0; f < width; f++) {
for (var p = 0; p < height; p++) {
this._initxy(x + f, y + p);
if (typeof this.dataarray[betterterrainhf.getindex(x + f, y + p)].i === "undefined") {
this.dataarray[betterterrainhf.getindex(x + f, y + p)].i = data[p][f];
this.dataarray[betterterrainhf.getindex(x + f, y + p)].s = chosenstructure.name;
}
}
}
}
}
}
};

betterterrain.prototype.generatebiomes = function(x, y) {
Expand All @@ -122,11 +169,6 @@ c(b);0>a.s2&&(a.s2+=1);c=null}})();
}
}
}
if (typeof this.options.biomes[chosentile].color !== "undefined") {
this.dataarray[betterterrainhf.getindex(x, y)].c = this.options.biomes[chosentile].color;
} else {
this.dataarray[betterterrainhf.getindex(x, y)].c = this.options.defaultcolor;
}
}

this.dataarray[betterterrainhf.getindex(x, y)].b = chosentile;
Expand All @@ -140,9 +182,9 @@ c(b);0>a.s2&&(a.s2+=1);c=null}})();
var moistureoctave1 = this.terrainnoise.noise2D(x / frequency, y / frequency);
var moistureoctave2 = 0.5 * this.terrainnoise.noise2D(2 * x / frequency, 2 * y / frequency);
var moistureoctave3 = 0.25 * this.terrainnoise.noise2D(4 * x / frequency, 4 * y / frequency);
var moistureresult = (moistureoctave1 + moistureoctave2 + moistureoctave3) * this.options.moistureweight / this.getprobablemoisture();
var moistureresult = (moistureoctave1 + moistureoctave2 + moistureoctave3) * this.options.moistureweight;

this.dataarray[betterterrainhf.getindex(x, y)].m = moistureresult;
this.dataarray[betterterrainhf.getindex(x, y)].m = moistureresult / this.getprobablemoisture();
}
};

Expand Down Expand Up @@ -185,14 +227,21 @@ c(b);0>a.s2&&(a.s2+=1);c=null}})();
var moisture1 = 1.75 * this.options.moistureweight;
return moisture1;
};

betterterrain.prototype.getdata = function(x, y) {
this.initxy(x, y);
betterterrain.prototype.setdata = function(x, y) {
this._initxy(x, y);
this.generateheightmap(x, y);
if (!this.options.onlyheight) {
this.generatemoisture(x, y);
this.generatebiomes(x, y);
if (this.options.structuresgen) {
this.generatestructures(x, y);
}
}
}

betterterrain.prototype.getdata = function(x, y) {
this.setdata(x, y);
var result = this.dataarray[betterterrainhf.getindex(x, y)];
return result;
};
Expand Down

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