Creates an instance of LogarithmicCoordinateCalculator
The SciChart 2D WebAssembly Context or {@link TSciChart2D | SciChart 2D WebAssembly Context} containing native methods and access to our WebGL2 Engine and WebAssembly numerical methods
The size of the associated Axis at the time of drawing
The AxisCore.visibleRange.min at the time of drawing
The AxisCore.visibleRange.max at the time of drawing
Whether the parent axis is an X or Y axis
The Logarithmic base, e.g. 10, for calculating log coordinates
Whether the flip-coordinates flag is true on the associated axis
A constant pixel offset used in coordinate calculations
When true, this coordinate calculator has flipped coordinates
When true, this coordinate calculator behaves as a Category coordinate calculator, using index not x-value for measuring
Gets the native (WebAssembly) {@link CoordinateCalculator} instance
Gets or sets a constant offset in pixels for all generated coordinates
Gets or sets the ViewportDimension, corresponding to the size of the associated Axis at the time of drawing
Gets or sets the Visible maximum value, corresponding to AxisCore.visibleRange.max at the time of drawing
Gets or sets the Visible minimum value, corresponding to AxisCore.visibleRange.min at the time of drawing
The SciChart 2D WebAssembly Context or {@link TSciChart2D | SciChart 2D WebAssembly Context} containing native methods and access to our WebGL2 Engine and WebAssembly numerical methods
Deletes native (WebAssembly) memory used by this type, after which it cannot be used.
Converts the Data-value to a pixel coordinate Performs the inverse operation to getDataValue
The data-value
the pixel coordinate
Converts the pixel coordinate to a Data-value. Performs the inverse operation to getCoordinate
The pixel coordiante
the data value
Generated using TypeDoc
Provides an implementation of Numeric Coordinate Calculator which transforms numeric data-values to pixel coordinates using logarithmic scaling and vice versa.
SciChart's JavaScript Charts perform conversion operations between data-coordinates for all drawing and axis measurements.
You can fetch a CoordinateCalculator instance by calling AxisCore.getCurrentCoordinateCalculator. This will return a unique calculator for the current draw pass.
You can convert pixel to data-coordinates and back by using the following code:
const axis: AxisCore; const calc = axis.getCurrentCoordinateCalculator(); const pixel = calc.getCoordinate(1.23); // Gets the pixel coordinate for data-value 1.23 const dataValue = cald.getDataValue(pixel); // Performs the inverse operation to get data-valueUse the Coordinate calculators when drawing, placing markers, annotations or if you want to place a tooltip over the chart.