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EPSRenderer.cc

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/*
    File:           EPSRenderer.cc

    Function:       Implements EPSRenderer.h

    Author(s):      Andrew Willmott

    Copyright:      (c) 1997-2000, Andrew Willmott

*/

#include <iostream.h>
#include "gcl/EPSRenderer.h"

EPSRenderer::EPSRenderer() : 
    Renderer(),
    matrixStack(1, 32),
    start(true),
    style(renNone),
    itsFilename("out.eps")
{
    matrixStack.Top() = vl_I;
    itsPlot.SetOutputSize(192); 
    // 192 points: this gets us same size as 400x400 picture at 150dpi in frame
}

Void EPSRenderer::ViewPoint(const HPoint &hp, Bool draw)
{
    Point p = proj(hp);

    if (draw)
        itsPlot.LineTo(p[0], p[1]);
    else
        itsPlot.MoveTo(p[0], p[1]);
}

Void EPSRenderer::Attach(StrConst epsFilename)
{
    itsFilename = epsFilename;
}

Void EPSRenderer::MakeCurrent()
{
}

Void EPSRenderer::Show()
{
    itsPlot.Close();
}


// --- Renderer Drawing Operators ---------------------------------------------


Renderer &EPSRenderer::SetColour(const Colour &c)
{
    itsPlot.SetColour(c);
    return(SELF);
}

Renderer &EPSRenderer::SetPoint(const Point &p)
{
    HPoint  hp(p, 1.0);

    hp = xform(matrixStack.Top(), hp);

    ClipPoint(hp, !start);

    if (start)
    {
        firstPoint = p;
        start = false;
    }
        
    return(SELF);
}

Renderer &EPSRenderer::SetCoord(const Coord &c)
{
    return(SetPoint(Vector(c, 0.0)));
}

Renderer &EPSRenderer::SetNormal(const Vector &n)
{
    return(SELF);
}

Renderer &EPSRenderer::SetTransform(const Transform &t)
{
    matrixStack.Top() *= t; 
    return(SELF);
}

Renderer &EPSRenderer::SetCamera(const Camera &c)
{
    matrixStack.Clear();
    matrixStack.Push(c.ProjMatrix() * c.ModelMatrix());
    return(SELF);
}

Renderer &EPSRenderer::Pop()
{
    matrixStack.Pop();
    return(SELF);
}

Renderer &EPSRenderer::Push()
{
    matrixStack.Push(matrixStack.Top());    
    return(SELF);
}

Renderer &EPSRenderer::Clear()
{
    itsPlot.Open(itsFilename);  
    itsPlot.SetPort(-1, -1, 1, 1, true);
    itsPlot.SetWidth(0.0005);

    return(SELF);
}

Renderer &EPSRenderer::Begin(RenderStyle newStyle)
{
    Assert(style == renNone, "Unmatched EPSRenderer::Begin().");
    style = newStyle;
    start = true;
    return(SELF);
}

Renderer &EPSRenderer::End()
{
    Assert(style != renNone, "Unmatched EPSRenderer::End().");

    if (style == renPoly || style == renLineLoop)
        // close loop
        SetPoint(firstPoint);

    style = renNone;
    return(SELF);
}

Void EPSRenderer::Print(ostream &s)
{
#ifdef BROKEN 
    s << "EPS Renderer\n  style = " << (int) style
      << " matrix = " << matrixStack.Top()
      << " start = " << start << endl;  
#endif
}

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