Leiter.Marchingsquares:

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: At first, you must define a line drawing function for the module to use.
This Function has to accept the following parameters: The rendertarget (an Object), the four coordinates of the line (x and y coordinates of
starting- and endpoint) (Integers) and the color of the line (an Integer).
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 will use your line drawing function. 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.
SetCellNum	Set cell number.
SetColorARGB	Set color.
SetInterpolation	Set interpolation.
SetLineFnc	Line function setter.
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(Target:Object,Width:Int,Height:Int,VX1:Int=0,VY1:Int=0,VX2:Int=-1,VY2:Int=-1)
Description	Plot.
Information	This function plots to the specified rendertarget.

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)
Description	Set interpolation.
Information	Set whether the plotting will be interpolated or not.

Method SetLineFnc(Fnc(Target:Object,X1:Int,Y1:Int,X2:Int,Y2:Int,ARGB:Int))
Description	Line function setter.
Information	Use this method to set the used line drawing function to your own.

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