Leiter.MarchingsquaresPixmap:

Marching squares algorithm implementation

This module provides an implementation of the marching squares algorithm.
Short info: The marching squares algorithm is an algorithm to plot implicit functions.
Working with this module is kind of straightforward: Create an object of TCurvePlotter and feed it with the necessary information:
-The sampling function, the sample's width and height
-Whether or not you want to interpolate
-the threshold (look up how the algorithm works if you want to know what the threshold is)
-the number of cells in horizontal and vertical direction
-the color of the contour which will be plotted

After that, invoke the "Plot"-Method (which returns a new pixmap containing the contour) or the "PlotToPixmap"-Method
(if you already have a pixmap on which you want to plot the contour). For plotting you can also specify a viewport.

Types Summary

TCurvePlotter

Curve plotter Type.

Types

Type TCurvePlotter
Description	Curve plotter Type.

Methods Summary
__MarchCell	Private method. DO NOT TOUCH!
Plot	Plot.
PlotToPixmap	Plot to a specified pixmap.
SetCellNum	Set cell number.
SetColorARGB	Set color.
SetInterpolation
SetSampleFnc	Set sample function.
SetSampleSize	Set sample size.
SetThreshold	Set the threshold.

Method __MarchCell(X:Int,Y:Int,CellWidth:Int,CellHeight:Int)
Description	Private method. DO NOT TOUCH!

Method Plot:TPixmap(Width:Int,Height:Int,VX1:Int=0,VY1:Int=0,VX2:Int=-1,VY2:Int=-1)
Description	Plot.
Information	This function creates a new pixmap and plots to it.

Method PlotToPixmap(Pixmap:TPixmap,VX1:Int=0,VY1:Int=0,VX2:Int=-1,VY2:Int=-1)
Description	Plot to a specified pixmap.

Method SetCellNum(Size:Int)
Description	Set cell number.
Information	Use this to set the number of cells in horizontal and vertical direction.

Method SetColorARGB(ARGB:Int)
Description	Set color.
Information	Use this to set the color (as an ARGB integer) of the plotted contour.

Method SetInterpolation(fInterpolate:Int=False)

Method SetSampleFnc(Fnc:Float(X:Int,Y:Int))
Description	Set sample function.
Information	Use this to set the function which returns the used data.

Method SetSampleSize(Width:Int,Height:Int)
Description	Set sample size.
Information	Use this to set the maximum size of the sample (limits the viewport of plotting)

Method SetThreshold(Threshold:Float=0)
Description	Set the threshold.
Information	Use this to set the used threshold.

Module Information

Author	Calvin 'n-Halbleiter' Bornhofen
Version	1.0
License	Public Domain
Copyright	Calvin Bornhofen