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2024-05-10 17:50| 来源: 网络整理| 查看: 265

simpleheat

A super-tiny JavaScript library for drawing heatmaps with Canvas. Inspired by heatmap.js, but with focus on simplicity and performance.

Powers Leaflet.heat, a heatmap plugin for Leaflet.

Demo: http://mourner.github.io/simpleheat/demo

simpleheat('canvas').data(data).draw(); Reference Constructor // create a simpleheat object given an id or canvas reference var heat = simpleheat(canvas); Data // set data of [[x, y, value], ...] format heat.data(data); // set max data value (1 by default) heat.max(max); // add a data point heat.add(point); // clear data heat.clear(); Appearance // set point radius and blur radius (25 and 15 by default) heat.radius(r, r2); // set gradient colors as {: ''}, e.g. {0.4: 'blue', 0.65: 'lime', 1: 'red'} heat.gradient(grad); // call in case Canvas size changed heat.resize(); Rendering // draw the heatmap with optional minimum point opacity (0.05 by default) heat.draw(minOpacity);

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