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feat: 3d mode - improve water bodies mesh

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Azgaar 2025-10-31 02:55:02 +01:00
parent 0eaabcb051
commit 585f3c34b1
3 changed files with 48 additions and 6 deletions
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41
modules/ui/3d.js
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@ -39,6 +39,7 @@ window.ThreeD = (function () {
let labels = [];
let icons = [];
let lines = [];
let gridToPackCellMap = null; // Map from grid cell index to pack cell index
const context2d = document.createElement("canvas").getContext("2d");
@ -486,8 +487,20 @@ window.ThreeD = (function () {
};
});
}
// create a mesh from pixel data
async function createMesh(width, height, segmentsX, segmentsY) {
// Build lookup map from grid cell index to pack cell index
gridToPackCellMap = new Map();
if (pack.cells?.g && pack.cells?.i) {
for (const packCellIndex of pack.cells.i) {
const gridCellIndex = pack.cells.g[packCellIndex];
if (!gridToPackCellMap.has(gridCellIndex)) {
gridToPackCellMap.set(gridCellIndex, packCellIndex);
}
}
}
if (texture) texture.dispose();
if (!options.wireframe) {
texture = new THREE.TextureLoader().load(await createMeshTextureUrl(), render);
@ -541,9 +554,32 @@ window.ThreeD = (function () {
}
}
const LOWER_BY_WATER = 18;
const DIVIDER = 100 - LOWER_BY_WATER;
function getMeshHeight(i) {
const h = grid.cells.h[i];
return h < 20 ? 0 : ((h - 18) / 82) * options.scale;
const height = grid.cells.h[i];
let waterCellId = null;
if (height < 20) {
waterCellId = i;
} else if (grid.cells.c[i]) {
waterCellId = grid.cells.c[i].find(c => grid.cells.h[c] < 20) ?? null;
}
// If water vertex, get uniform elevation
if (waterCellId !== null) {
const packCellIndex = gridToPackCellMap.get(waterCellId);
const featureId = pack.cells.f[packCellIndex];
if (featureId === undefined) return 0;
const feature = pack.features[featureId];
const waterHeight = feature.type === "lake" && feature.height ? feature.height : 20;
return ((waterHeight - LOWER_BY_WATER) / DIVIDER) * options.scale;
}
// Land vertex
return ((height - LOWER_BY_WATER) / DIVIDER) * options.scale;
}
function extendWater(width, height) {
@ -699,6 +735,7 @@ window.ThreeD = (function () {
script.onerror = () => resolve(false);
});
}
function OrbitControls(camera, domElement) {
if (THREE.OrbitControls) return new THREE.OrbitControls(camera, domElement);