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Andras Schmelczer 2026-03-12 22:11:00 +00:00
parent 14a3555cf1
commit 7e92bf112e
34 changed files with 1214437 additions and 224 deletions
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18
frontend/src/lib/map-utils.ts
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@ -8,6 +8,7 @@ import {
ZOOM_TO_RESOLUTION_THRESHOLDS,
TWEMOJI_BASE,
BUFFER_MULTIPLIER,
ENUM_PALETTE,
} from './consts';
const ROAD_OPACITY = 0.4;
@ -193,9 +194,16 @@ export function emojiToTwemojiUrl(emoji: string): string {
return `${TWEMOJI_BASE}${hex}.png`;
}
/** Look up a discrete color from the enum palette by index (wraps if > palette size). */
export function enumIndexToColor(index: number): [number, number, number] {
const i = Math.round(Math.max(0, index)) % ENUM_PALETTE.length;
return ENUM_PALETTE[i];
}
/**
* Shared fill-color logic for hex and postcode layers.
* When a viewFeature is active, normalizes by colorRange and applies the feature gradient.
* For enum features (enumCount > 0), uses discrete palette colors instead of gradient.
* Otherwise falls back to density-based coloring using countRange.
*/
export function getFeatureFillColor(
@ -207,7 +215,8 @@ export function getFeatureFillColor(
countNormalized: number,
densityGradient: GradientStop[],
isDark: boolean,
alpha: number
alpha: number,
enumCount: number = 0
): [number, number, number, number] {
if (colorRange) {
if (value == null)
@ -222,6 +231,13 @@ export function getFeatureFillColor(
];
}
}
// Discrete coloring for enum features
if (enumCount > 0) {
const rgb = enumIndexToColor(Math.round(value as number));
return [...rgb, alpha] as [number, number, number, number];
}
const range = colorRange[1] - colorRange[0];
if (range === 0)
return [...FEATURE_GRADIENT[0].color, alpha] as [number, number, number, number];