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Add labels on geometries in the various benchmarks #189

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Add labels on geometries in the various benchmarks #189

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a01fd8c
misc minor fixes
jahow Oct 17, 2025
4f1f34f
Add labels on geometries & show them in the various examples
jahow Mar 8, 2025
6d67bbe
add text toggle for some cases
jahow Oct 17, 2025
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10 changes: 9 additions & 1 deletion cases/common.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ import {
trackPerformance,
// @ts-ignore
} from '@camptocamp/rendering-analyzer';
import randomName from '@scaleway/random-name';
import lilGui from 'lil-gui';
import Map from 'ol/Map.js';
import View from 'ol/View.js';
Expand Down Expand Up @@ -164,11 +165,13 @@ export function generatePolygons(count, numVertices) {
// Close the polygon by adding the first vertex at the end
polygonCoordinates.push(polygonCoordinates[0]);

const label = `This area covers ${randomName()}`;
features.push({
type: 'Feature',
properties: {
color: getRandomPaletteColor(),
ratio: Math.round(Math.random() * 100),
label,
},
geometry: {
type: 'Polygon',
Expand Down Expand Up @@ -197,11 +200,13 @@ export function generatePoints(count, radius) {
for (let lon = -180; lon < 180 - size / 4; lon += size) {
for (let lat = -90; lat < 90 - size / 4; lat += size) {
const buffer = (0.3 + Math.random() * 0.2) * size * (radius / 5); // Increase the buffer for larger points
const label = randomName();
features.push({
type: 'Feature',
properties: {
color: getRandomPaletteColor(),
radius,
label,
},
geometry: {
type: 'Point',
Expand Down Expand Up @@ -254,11 +259,13 @@ export function generateLines(lineCount, curveComplexity, width) {
}
coordinates.push(...singleCurve);
}
const label = `This leads to ${randomName()}`;
features.push({
type: 'Feature',
properties: {
color: getRandomPaletteColor(), // Use deterministic color selection
width,
label,
},
geometry: {
type: 'LineString',
Expand All @@ -285,7 +292,7 @@ const guiParams = {};
* The `id` and `values` will show up in the url
* @param {string} id Id
* @param {string} label Label
* @param {Array<string>|Array<number>} values Either two string values for true/false, or two numbers defining a range
* @param {Array<string>|Array<number>} values Either two string values for true/false, or two numbers defining a range + optional step value
* @param {boolean|number|function(): void} defaultValue Default value
* @param {function(boolean|number|function(): void, boolean|null): void} callback Called when the parameter changes, and also on initialization
* First argument is the current value, second argument is true if this is the initial call
Expand Down Expand Up @@ -454,6 +461,7 @@ function animate() {
}, 1000);
}

/** @type {string} */
export const olVersion =
new URL(window.location.href).searchParams.get('olVersion') ??
// @ts-ignore
Expand Down
42 changes: 36 additions & 6 deletions cases/line-rendering/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,15 +16,27 @@ const source = new VectorSource({
});

/**
*
* @type {import('ol/style/flat.js').FlatStyle}
*/
const style = {
const baseStyle = {
'stroke-width': ['get', 'width'],
'stroke-color': ['get', 'color'],
'stroke-line-dash': [15, 15],
};

/**
* @type {import('ol/style/flat.js').FlatStyle}
*/
const textStyle = {
'text-value': ['get', 'label'],
'text-font': 'bold 12px "Open Sans", "Arial Unicode MS", sans-serif',
'text-fill-color': '#333',
'text-stroke-color': 'rgba(255,255,255,0.8)',
'text-stroke-width': 2,
'text-placement': 'line',
'text-repeat': 2000,
};

/**
* @param {number} lineCount From 1 to 100
* @param {number} curveComplexity From 2 to 1000
Expand All @@ -37,18 +49,24 @@ function resetData(lineCount, curveComplexity, width) {
function main() {
createMap(
(map) => {
const style = getGuiParameterValue('text')
? {...baseStyle, ...textStyle}
: baseStyle;
map.addLayer(new WebGLVectorLayer({source, properties: {style}}));
},
(map) => {
const style = getGuiParameterValue('text')
? {...baseStyle, ...textStyle}
: baseStyle;
map.addLayer(new VectorLayer({source, style}));
},
);
initializeGui();
registerGuiParameter(
'count',
'Line count',
[2, 100, 10],
2,
[2, 10000, 10],
10,
(value, initial) => {
if (initial) {
return;
Expand Down Expand Up @@ -93,9 +111,21 @@ function main() {
false,
(value, initial) => {
if (value) {
style['stroke-line-dash'] = [15, 15];
baseStyle['stroke-line-dash'] = [15, 15];
} else {
delete style['stroke-line-dash'];
delete baseStyle['stroke-line-dash'];
}
regenerateLayer();
},
);
registerGuiParameter(
'text',
'Show labels',
['yes', 'no'],
false,
(value, initial) => {
if (initial) {
return;
}
regenerateLayer();
},
Expand Down
34 changes: 32 additions & 2 deletions cases/point-rendering/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import {
generatePoints,
getGuiParameterValue,
initializeGui,
regenerateLayer,
registerGuiParameter,
} from '../common.js';

Expand All @@ -17,15 +18,26 @@ const source = new VectorSource({
/**
* @type {import('ol/style/flat.js').FlatStyle}
*/
const style = {
const baseStyle = {
// This has to be fixed upstream
// @ts-ignore
'circle-radius': ['get', 'radius'],
'circle-fill-color': ['get', 'color'],
'circle-stroke-color': 'gray',
'circle-stroke-width': 0.5,
};

/**
* @type {import('ol/style/flat.js').FlatStyle}
*/
const textStyle = {
'text-value': ['get', 'label'],
'text-font': 'bold 12px "Open Sans", "Arial Unicode MS", sans-serif',
'text-fill-color': '#333',
'text-stroke-color': 'rgba(255,255,255,0.8)',
'text-stroke-width': 2,
'text-offset-y': -12,
};

/**
* @param {number} count The number of features to create.
* @param {number} radius
Expand All @@ -38,9 +50,15 @@ function resetData(count, radius) {
function main() {
createMap(
(map) => {
const style = getGuiParameterValue('text')
? {...baseStyle, ...textStyle}
: baseStyle;
map.addLayer(new WebGLVectorLayer({source, properties: {style}}));
},
(map) => {
const style = getGuiParameterValue('text')
? {...baseStyle, ...textStyle}
: baseStyle;
map.addLayer(new VectorLayer({source, style}));
},
);
Expand Down Expand Up @@ -69,6 +87,18 @@ function main() {
/** @type {number} */ (value),
);
});
registerGuiParameter(
'text',
'Show labels',
['yes', 'no'],
false,
(value, initial) => {
if (initial) {
return;
}
regenerateLayer();
},
);

resetData(
/** @type {number} */ (getGuiParameterValue('count')),
Expand Down
45 changes: 40 additions & 5 deletions cases/polygon-rendering/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,8 +18,25 @@ const source = new VectorSource({
/**
* @type {import('ol/style/flat.js').FlatStyle}
*/
const style = {
const baseStyle = {
'fill-color': ['get', 'color'],
'text-value': ['get', 'label'],
'text-font': 'bold 12px "Open Sans", "Arial Unicode MS", sans-serif',
'text-fill-color': '#333',
'text-stroke-color': 'rgba(255,255,255,0.8)',
'text-stroke-width': 2,
};

/**
* @type {import('ol/style/flat.js').FlatStyle}
*/
const textStyle = {
'text-value': ['get', 'label'],
'text-font': 'bold 12px "Open Sans", "Arial Unicode MS", sans-serif',
'text-fill-color': '#333',
'text-stroke-color': 'rgba(255,255,255,0.8)',
'text-stroke-width': 2,
'text-offset-y': -12,
};

/**
Expand All @@ -33,9 +50,15 @@ function resetData(count, numVertices) {
function main() {
createMap(
(map) => {
const style = getGuiParameterValue('text')
? {...baseStyle, ...textStyle}
: baseStyle;
map.addLayer(new WebGLVectorLayer({source, properties: {style}}));
},
(map) => {
const style = getGuiParameterValue('text')
? {...baseStyle, ...textStyle}
: baseStyle;
map.addLayer(new VectorLayer({source, style}));
},
);
Expand Down Expand Up @@ -77,11 +100,23 @@ function main() {
true,
(value, initial) => {
if (value) {
style['stroke-width'] = 2;
style['stroke-color'] = 'gray';
baseStyle['stroke-width'] = 2;
baseStyle['stroke-color'] = 'gray';
} else {
delete style['stroke-width'];
delete style['stroke-color'];
delete baseStyle['stroke-width'];
delete baseStyle['stroke-color'];
}
regenerateLayer();
},
);
registerGuiParameter(
'text',
'Show labels',
['yes', 'no'],
false,
(value, initial) => {
if (initial) {
return;
}
regenerateLayer();
},
Expand Down
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