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/*
Copyright (C) 2007 Paul Davis
Author: David Robillard
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "diamond.h"
using namespace Gnome::Canvas;
using namespace Gnome::Art;
Diamond::Diamond(Group& group, double height)
: Polygon(group)
, _x (0)
, _y (0)
, _h (height)
{
points = gnome_canvas_points_new (4);
move_to (0, 0);
}
Diamond::~Diamond ()
{
gnome_canvas_points_free (points);
}
void
Diamond::set_height (double height)
{
_h = height;
move_to (_x, _y);
}
void
Diamond::move_to (double x, double y)
{
_x = x;
_y = y;
points->coords[0] = _x;
points->coords[1] = _y + (_h * 2.0);
points->coords[2] = _x + _h;
points->coords[3] = _y + _h;
points->coords[4] = _x;
points->coords[5] = _y;
points->coords[6] = _x - _h;
points->coords[7] = _y + _h;
g_object_set (gobj(), "points", points, NULL);
}
void
Diamond::move_by (double dx, double dy)
{
points->coords[0] += dx;
points->coords[1] += dy;
points->coords[2] += dx;
points->coords[3] += dy;
points->coords[4] += dx;
points->coords[5] += dy;
points->coords[6] += dx;
points->coords[7] += dy;
g_object_set (gobj(), "points", points, NULL);
}
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