backups/Fantasy-Map-Generator
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Fractious template

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Azgaar 2022-05-21 19:46:42 +03:00
parent cf92a65ea1
commit a16e609696
5 changed files with 124 additions and 129 deletions
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19
modules/heightmap-generator.js
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@ -61,7 +61,7 @@ window.HeightmapGenerator = (function () {
if (a1 === "Range") return addRange(a2, a3, a4, a5);
if (a1 === "Trough") return addTrough(a2, a3, a4, a5);
if (a1 === "Strait") return addStrait(a2, a3);
if (a1 === "Insulate") return insulate(a2);
if (a1 === "Mask") return mask(a2);
if (a1 === "Add") return modify(a3, +a2, 1);
if (a1 === "Multiply") return modify(a3, 0, +a2);
if (a1 === "Smooth") return smooth(a2);
@ -432,14 +432,17 @@ window.HeightmapGenerator = (function () {
});
};
const insulate = (fr = 2) => {
const power = fr * 2;
const mask = (power = 1) => {
const fr = power ? Math.abs(power) : 1;
cells.h = cells.h.map((h, i) => {
const [x, y] = p[i];
const nx = (2 * x) / graphWidth - 1;
const ny = (2 * y) / graphHeight - 1;
const distance = (1 - nx ** power) * (1 - ny ** power); // 1 is center, 0 is edge
return h * distance;
const nx = (2 * x) / graphWidth - 1; // [-1, 1], 0 is center
const ny = (2 * y) / graphHeight - 1; // [-1, 1], 0 is center
let distance = (1 - nx ** 2) * (1 - ny ** 2); // 1 is center, 0 is edge
if (power < 0) distance = 1 - distance; // inverted, 0 is center, 1 is edge
const masked = h * distance;
return lim((h * (fr - 1) + masked) / fr);
});
};
@ -462,5 +465,5 @@ window.HeightmapGenerator = (function () {
}
}
return {generate, addHill, addRange, addTrough, addStrait, addPit, smooth, modify, insulate};
return {generate, addHill, addRange, addTrough, addStrait, addPit, smooth, modify, mask};
})();