van Wijk Smooth Zooming

van Wijk Smooth Zooming

This example demonstrates smooth zooming transitions between two positions and scales over a static hexbin mesh. The visualization uses `d3.interpolateZoom` to interpolate between two center coordinates and zoom levels, with an SVG `g` element animated via `transition.attrTween`. The code renders a hexagonal grid mesh using the d3.hexbin library, with circular markers highlighting the start and end points. The animation loops indefinitely, alternating direction between the two views, and uses the `transform` function to calculate the appropriate translation and scaling for each frame.

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Pan & Zoom IV

Two thousand circles laid out in a phyllotaxis spiral show the d3.zoom behavior applied by directly manipulating each circle’s SVG transform attribute. On every zoom event, the code calls *transform*.applyX and *transform*.applyY to remap the original data coordinates, keeping all circle radii constant at 2.5 pixels while allowing pan and zoom between half and four times the initial scale. This approach, written in d3.v4 with SVG, demonstrates an alternative to scaling a single parent group, trading performance for customization.

74% match

Zoom Transitions

A thousand points arranged in a phyllotaxis spiral zoom smoothly between random targets. Every 2.5 seconds, the d3-zoom transform animates to center a newly selected point, shown in red, at the viewport’s center. The example uses d3.zoom’s `transform` method within a d3.transition, rendering the points to a Canvas 2D context via the `zoom` event handler.

Zoom + Pan

A zoomable and pannable SVG viewport displays a large grid with axes, controlled by the mouse. The example shows how to programmatically reset the zoom state using a button. It uses d3.behavior.zoom with d3.scale.linear domains, and a transition tween with d3.interpolate to animate the domain reset. The axes and grid are rendered as SVG shapes, and zoomed() rebinds the axes to the updated scales during the transition.

SVG Semantic Zooming

SVG semantic zooming applies a zoom transform to the positions of 2,000 circles generated with d3.randomNormal, while keeping their radius constant. The example uses d3.zoom to listen for wheel and drag events, and each circle’s transform attribute is updated via a custom function that applies d3.event.transform to its datum coordinates. A transparent overlay rectangle captures pointer events, and the circles are rendered as SVG elements with a fixed radius of 2.5 pixels, demonstrating how semantic zoom scales positions without altering symbol size.

Van Wijk & Nuij Zooming

This example demonstrates a smooth and efficient zooming and panning animation for interactive maps, based on the algorithm by Van Wijk and Nuij. It uses Polymaps to render Bing Maps imagery and animates the map's center and zoom level over time. The JavaScript code calculates a path between two map states, applying logarithmic interpolation to create a natural, accelerated motion. The animation is triggered by a search query, which finds a location and animates the map to focus on it.

Zoom Transitions

Animated grid lines on a canvas demonstrate D3’s zoom transitions, which smoothly pan and scale the view every five seconds to a new random location. The example uses `d3.behavior.zoom` with linear scales, and `transition.call` to invoke the zoom’s translate and event methods. Grid rendering relies on the Canvas 2D API, drawing vertical and horizontal lines based on the current domain, with line width scaling by zoom level.

72% match