D3 layout to visualize distance variables using a continuous Morton (Z-order) space-filling curve. Here's an example.
See also d3-hilbert.
import d3ZOrder from 'd3-morton';or using a script tag
<script src="//unpkg.com/d3-morton"></script>then
const myRange = { start: 4, length: 9 };
d3.zOrder()
.order(2)
.layout(myRange)| Method | Description | Default |
|---|---|---|
| canvasWidth([number]) | Getter/setter for the length of each side of the square canvas which covers the full domain of the Z-order curve. | 1 |
| order([int]) | Getter/setter for the extent of the Z-Order curve domain, determined by 4^order. The maximum safe order is 26, due to the JS numbers upper-boundary of 53 bits. |
4 |
| simplifyCurves([boolean]) | Getter/setter for whether to simplify the resolution of the curve to the most canonical 2-bit boundary that fits the range integral. For example, in a 2nd order curve (16 values), a range from 8 to 15 can be simplified from 8 vertices to 2 (each filling a square with 4 values), on the lower quadrants. This simplification greatly reduces the number of vertices in the curve and improves the calculation and rendering performance, specially for high-order ranges which tend to fall on 2-bit boundaries. | true |
| layout(rangeObject) | Extends the input rangeObject (syntax: {start:<int>, length:<int>}) with 2 additional properties defining the Z-Order curve: .cellWidth (number defining the side length of each square cell and essentially the thickness of the line, according to the canvasWidth) and .pathVertices (Array of [num,num], the sequential x,y coordinates of all the vertex points in the curve). |
|
| getValAtXY(num, num) | Returns the reverse translated value on the curve domain found at coordinates x,y, relative to the canvasWidth. |