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// primShape.cpp
// Context Free
// ---------------------
// Copyright (C) 2006-2011 John Horigan
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// John Horigan can be contacted at john@glyphic.com or at
// John Horigan, 1209 Villa St., Mountain View, CA 94041-1123, USA
//
//
#include "primShape.h"
#include <cmath>
#include "agg2/agg_basics.h"
using namespace agg;
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
static const double h = 0.5 / cos(M_PI/6.0);
static const double hp = h;
static const double hn = -h / 2.0;
static const double t = sqrt(2.0) / 4.0;
const primShape::primShapes_t primShape::shapeMap = { {
{ // circle pseudo-vertices
{ 0.5, 0.0 },
{ t, t },
{ 0.0, 0.5 },
{ -t, t },
{-0.5, 0.0 },
{ -t, -t },
{ 0.0, -0.5 },
{ t, -t }
},
{ // square vertices
{ 0.5, 0.5 },
{ -0.5, 0.5 },
{ -0.5, -0.5 },
{ 0.5, -0.5 }
},
{ // triangle vertices
{ 0.0, hp },
{-0.5, hn },
{ 0.5, hn }
}
} };
const primShape::primNames_t primShape::shapeNames = {
{ "CIRCLE", "SQUARE", "TRIANGLE", "FILL" }
};
unsigned
primIter::vertex(double* x, double* y)
{
if (mData && mIndex < mData->total_vertices()) {
return mData->vertex(mIndex++, x, y);
} else {
*x = *y = 0.0;
return agg::path_cmd_stop;
}
}
void
primIter::rewind(unsigned i)
{
mIndex = i;
}
void
primIter::init(const primShape* shape)
{
mData = shape;
mIndex = 0;
}
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