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EPSPlot.h

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/*
    File:       EPSPlot.h

    Purpose:    Defines vanilla class for doing 2D plotting and producing eps output.
                adopted from Paul Heckbert's libplo/ps.c
    
    Author:     Paul Heckbert, Andrew Willmott
*/

#ifndef __EPSPlot__
#define __EPSPlot__

#include "gcl/Geometry.h"
#include "gcl/Colour.h"
#include "cl/String.h"


enum { lineDashed, lineDotted, lineSolid };

class EPSPlot
{
public:
    EPSPlot();
    
    Void    Open(const Char *filename);
    Void    Close();
    
    Void    MoveTo(GCLReal x, GCLReal y);
    Void    LineTo(GCLReal x, GCLReal y);
    Void    SetWidth(GCLReal width);
    Void    LineStyle(Int style);
    Void    Dot(GCLReal x, GCLReal y, GCLReal r);
    Void    Circle(GCLReal x, GCLReal y, GCLReal r);
    Void    DrawText(GCLReal x, GCLReal y, Char *string);

    Void    SetColour(const Colour &c);
    
    Void    SetOutputSize(GCLReal size);        // measured in 1/72 of an inch.
            // Must be called before an 'Open'.
    Void    SetPort(GCLReal left, GCLReal bottom, 
                GCLReal right, GCLReal top, Bool centred);
            // If 'centred' is true, the origin will be at the centre of the port,
            // otherwise it will be placed at the bottom-left. Other positions
            // for the origin can be achieved by using 'Translate' after calling
            // SetPort.
            // If you want more than one view setup,
            // you must Push/Pop around the previous one.
            
    Void    Push();
    Void    Pop();
    Void    Translate(GCLReal tx, GCLReal ty);
    Void    Scale(GCLReal sx, GCLReal sy);
    Void    Rotate(GCLReal angle);

    Void    Comment(StrConst string);

    Bool    level2;
    // Warning: Adobe "Illustrator" can't handle level2, so it's off
    // by default.

protected:
    Void    Stroke();

    FILE    *file;
    Bool    drawn;
    GCLReal scale;
    Char    *font;
    GCLReal width;
    GCLReal worldScale;
};

#endif

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