Pan & Zoom III

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Pan & Zoom III

✓ Published0🌍 Public

Last edited Apr 7, 2017

Created on Apr 7, 2017

This example shows a dense spiral of 2,000 circles generated by a phyllotaxis pattern, which users can pan and zoom. The d3-zoom behavior is attached to an invisible overlay rectangle that covers the entire SVG, ensuring it captures all pointer input. On each zoom event, the code applies the current zoom transform to the group element containing the circles via `d3.event.transform` in the `zoomed` callback. This uses SVG transforms and d3.v4’s zoom API, with scale limits set between 0.5 and 4.

AI-generated description

This example demonstrates using d3-zoom to pan and zoom an SVG element by applying an SVG transform using transform.toString. The zoom behavior is applied to an invisible rect overlaying the SVG element; this ensures that it receives input, and that the pointer coordinates are not affected by the zoom behavior’s transform.

forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/4e3925cdc804db257a86fdef3a032a45'>Pan & Zoom III</a>

gpl-3.0 Licensed

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