plotboilerplate.js

Class: Grid

Grid(center, size)

new Grid(center, size)

The constructor.
Parameters:
Name Type Description
center Vertex The offset of the grid (default is [0,0]).
size Vertex The x- and y-size of the grid.
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Members

(static) utils

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Methods

(inner) baseLog(base, num) → {number}

Calculate the logarithm of the given number (num) to a given base.

This function returns the number l with
num == Math.pow(base,l)
Parameters:
Name Type Description
base number The base to calculate the logarithm to.
num number The number to calculate the logarithm for.
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Returns:
log(base)/log(num)
Type
number

(inner) mapRasterScale(adjustFactor, scale) → {number}

Calculate the raster scale for a given logarithmic mapping.

Example (with adjustFactor=2):
If scale is 4.33, then the mapping is 1/2 (because 2^2 <= 4.33 <= 2^3)

If scale is 0.33, then the mapping is 2 because (2^(1/2) >= 0.33 >= 2^(1/4)
Parameters:
Name Type Description
adjustFactor number The base for the logarithmic raster scaling when zoomed.
scale number The currently used scale factor.
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Returns:
Type
number