class

UnicodePlot::DensityCanvas

Inherits UnicodePlot::Canvas < UnicodePlot::GraphicsArea < Reference < Object

2D point-density canvas. Each character cell accumulates a hit count; at render time the count is normalised to the 5-level density palette. Matches Julia UnicodePlots DensityCanvas: y_pixel_per_char=2, x_pixel_per_char=1.

Constructors

new(char_height : Int32, char_width : Int32, *, visible : Bool = true, blend : Bool = true, origin_y : Float64 = 0.0, origin_x : Float64 = 0.0, height : Float64 = 1.0, width : Float64 = 1.0, yflip : Bool = false, xflip : Bool = false, yscale : Symbol | Proc(Float64, Float64) = :identity, xscale : Symbol | Proc(Float64, Float64) = :identity, dscale : Symbol | Proc(Float64, Float64) = :identity)
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Instance methods

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grid_char_at(row : Int32, col : Int32) : Char

Map grid value to display character. Must be overridden by subclasses.

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pixel!(pixel_x : Int32, pixel_y : Int32, color : UInt32, blend : Bool) : self
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preprocess(io : IO) : GraphicsArea ->

Preprocessing hook (returns cleanup proc). Override in subclasses that need it.

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x_pixel_per_char
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y_pixel_per_char
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