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feat: move biomes code to a separate module, reduce deserts amount
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| "use strict"; | ||
|
|
||
| const MIN_LAND_HEIGHT = 20; | ||
|
|
||
| const names = [ | ||
| "Marine", | ||
| "Hot desert", | ||
| "Cold desert", | ||
| "Savanna", | ||
| "Grassland", | ||
| "Tropical seasonal forest", | ||
| "Temperate deciduous forest", | ||
| "Tropical rainforest", | ||
| "Temperate rainforest", | ||
| "Taiga", | ||
| "Tundra", | ||
| "Glacier", | ||
| "Wetland" | ||
| ]; | ||
|
|
||
| window.Biomes = (function () { | ||
| const getDefault = () => { | ||
| const name = [ | ||
| "Marine", | ||
| "Hot desert", | ||
| "Cold desert", | ||
| "Savanna", | ||
| "Grassland", | ||
| "Tropical seasonal forest", | ||
| "Temperate deciduous forest", | ||
| "Tropical rainforest", | ||
| "Temperate rainforest", | ||
| "Taiga", | ||
| "Tundra", | ||
| "Glacier", | ||
| "Wetland" | ||
| ]; | ||
|
|
||
| const color = [ | ||
| "#466eab", | ||
| "#fbe79f", | ||
| "#b5b887", | ||
| "#d2d082", | ||
| "#c8d68f", | ||
| "#b6d95d", | ||
| "#29bc56", | ||
| "#7dcb35", | ||
| "#409c43", | ||
| "#4b6b32", | ||
| "#96784b", | ||
| "#d5e7eb", | ||
| "#0b9131" | ||
| ]; | ||
| const habitability = [0, 4, 10, 22, 30, 50, 100, 80, 90, 12, 4, 0, 12]; | ||
| const iconsDensity = [0, 3, 2, 120, 120, 120, 120, 150, 150, 100, 5, 0, 150]; | ||
| const icons = [ | ||
| {}, | ||
| {dune: 3, cactus: 6, deadTree: 1}, | ||
| {dune: 9, deadTree: 1}, | ||
| {acacia: 1, grass: 9}, | ||
| {grass: 1}, | ||
| {acacia: 8, palm: 1}, | ||
| {deciduous: 1}, | ||
| {acacia: 5, palm: 3, deciduous: 1, swamp: 1}, | ||
| {deciduous: 6, swamp: 1}, | ||
| {conifer: 1}, | ||
| {grass: 1}, | ||
| {}, | ||
| {swamp: 1} | ||
| ]; | ||
| const cost = [10, 200, 150, 60, 50, 70, 70, 80, 90, 200, 1000, 5000, 150]; // biome movement cost | ||
| const biomesMartix = [ | ||
| // hot ↔ cold [>19°C; <-4°C]; dry ↕ wet | ||
| new Uint8Array([1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 10]), | ||
| new Uint8Array([3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 9, 9, 9, 9, 10, 10, 10]), | ||
| new Uint8Array([5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 9, 9, 9, 9, 9, 10, 10, 10]), | ||
| new Uint8Array([5, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10]), | ||
| new Uint8Array([7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 10]) | ||
| ]; | ||
|
|
||
| // parse icons weighted array into a simple array | ||
| for (let i = 0; i < icons.length; i++) { | ||
| const parsed = []; | ||
| for (const icon in icons[i]) { | ||
| for (let j = 0; j < icons[i][icon]; j++) { | ||
| parsed.push(icon); | ||
| } | ||
| } | ||
| icons[i] = parsed; | ||
| } | ||
|
|
||
| return {i: d3.range(0, name.length), name, color, biomesMartix, habitability, iconsDensity, icons, cost}; | ||
| }; | ||
|
|
||
| // assign biome id for each cell | ||
| function define() { | ||
| TIME && console.time("defineBiomes"); | ||
|
|
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| const {fl: flux, r: riverIds, h: heights, c: neighbors, g: gridReference} = pack.cells; | ||
| const {temp, prec} = grid.cells; | ||
| pack.cells.biome = new Uint8Array(pack.cells.i.length); // biomes array | ||
|
|
||
| for (let cellId = 0; cellId < heights.length; cellId++) { | ||
| const height = heights[cellId]; | ||
| const moisture = height < MIN_LAND_HEIGHT ? 0 : calculateMoisture(cellId); | ||
| const temperature = temp[gridReference[cellId]]; | ||
| pack.cells.biome[cellId] = getId(moisture, temperature, height, Boolean(riverIds[cellId])); | ||
| } | ||
|
|
||
| function calculateMoisture(cellId) { | ||
| let moisture = prec[gridReference[cellId]]; | ||
| if (riverIds[cellId]) moisture += Math.max(flux[cellId] / 10, 2); | ||
|
|
||
| const moistAround = neighbors[cellId] | ||
| .filter(neibCellId => heights[neibCellId] >= MIN_LAND_HEIGHT) | ||
| .map(c => prec[gridReference[c]]) | ||
| .concat([moisture]); | ||
| return rn(4 + d3.mean(moistAround)); | ||
| } | ||
|
|
||
| TIME && console.timeEnd("defineBiomes"); | ||
| } | ||
|
|
||
| function getId(moisture, temperature, height, hasRiver) { | ||
| if (height < 20) return 0; // all water cells: marine biome | ||
| if (temperature < -5) return 11; // too cold: permafrost biome | ||
| if (temperature >= 25 && !hasRiver && moisture < 8) return 1; // too hot and dry: hot desert biome | ||
| if (isWetland(moisture, temperature, height)) return 12; // too wet: wetland biome | ||
|
|
||
| // in other cases use biome matrix | ||
| const moistureBand = Math.min((moisture / 5) | 0, 4); // [0-4] | ||
| const temperatureBand = Math.min(Math.max(20 - temperature, 0), 25); // [0-25] | ||
| return biomesData.biomesMartix[moistureBand][temperatureBand]; | ||
| } | ||
|
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| function isWetland(moisture, temperature, height) { | ||
| if (temperature <= -2) return false; // too cold | ||
| if (moisture > 40 && height < 25) return true; // near coast | ||
| if (moisture > 24 && height > 24 && height < 60) return true; // off coast | ||
| return false; | ||
| } | ||
|
|
||
| return {getDefault, define, getId}; | ||
| })(); |
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