#region LICENSE
/*
* Copyright (C) 2004 - 2007 David Hudson (jendave@yahoo.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#endregion LICENSE
using System;
using System.Collections;
using System.Drawing;
using System.Globalization;
using Tao.Sdl;
using SdlDotNet.Core;
namespace SdlDotNet.Graphics.Primitives{
/// <summary>
/// Circle Primitive
/// </summary>
public struct Circle : IPrimitive
{
short x;
short y;
short r;
/// <summary>
/// Constructor for Circle
/// </summary>
/// <param name="positionX">X coordinate of Center</param>
/// <param name="positionY">Y coordinate of Center</param>
/// <param name="radius">Radius</param>
public Circle(short positionX, short positionY, short radius)
{
this.x = positionX;
this.y = positionY;
this.r = radius;
}
/// <summary>
/// Constructor for Circle
/// </summary>
/// <param name="center">Center point</param>
/// <param name="radius">Radius</param>
public Circle(Point center, short radius)
{
this.x = (short)center.X;
this.y = (short)center.Y;
this.r = radius;
}
/// <summary>
/// Center of circle
/// </summary>
public Point Center
{
get
{
return new Point(this.x, this.y);
}
set
{
this.x = (short)value.X;
this.y = (short)value.Y;
}
}
/// <summary>
/// X position of circle
/// </summary>
public short PositionX
{
get
{
return this.x;
}
set
{
this.x = value;
}
}
/// <summary>
/// Y position of circle
/// </summary>
public short PositionY
{
get
{
return this.y;
}
set
{
this.y = value;
}
}
/// <summary>
/// Radius of circle
/// </summary>
public short Radius
{
get
{
return this.r;
}
set
{
this.r = value;
}
}
/// <summary>
/// Draw filled primitive onto surface
/// </summary>
/// <param name="surface">Surface to draw to</param>
/// <param name="color">Color to fill primitive</param>
/// <param name="antiAlias">antialias primitive</param>
/// <param name="fill">fill primitive with color</param>
public void Draw(Surface surface, System.Drawing.Color color, bool antiAlias, bool fill)
{
if (surface == null)
{
throw new ArgumentNullException("surface");
}
if (fill)
{
int result = SdlGfx.filledCircleRGBA(surface.Handle, this.PositionX, this.PositionY, this.Radius, color.R, color.G, color.B,
color.A);
GC.KeepAlive(this);
if (result != (int)SdlFlag.Success)
{
throw SdlException.Generate();
}
}
else
{
int result = 0;
if (antiAlias)
{
result = SdlGfx.aacircleRGBA(surface.Handle, this.PositionX, this.PositionY, this.Radius, color.R, color.G, color.B,
color.A);
GC.KeepAlive(this);
}
else
{
result = SdlGfx.circleRGBA(surface.Handle, this.PositionX, this.PositionY, this.Radius, color.R, color.G, color.B,
color.A);
GC.KeepAlive(this);
}
if (result != (int)SdlFlag.Success)
{
throw SdlException.Generate();
}
}
}
/// <summary>
/// Draw primitive onto surface
/// </summary>
/// <param name="surface">surface to draw to</param>
/// <param name="color">Color of primitive</param>
/// <param name="antiAlias">Antialias primitive</param>
public void Draw(Surface surface, System.Drawing.Color color, bool antiAlias)
{
this.Draw(surface, color, antiAlias, false);
}
/// <summary>
/// Draw primitive onto surface
/// </summary>
/// <param name="surface">surface to draw to</param>
/// <param name="color">Color of primitive</param>
public void Draw(Surface surface, System.Drawing.Color color)
{
Draw(surface, color, true, false);
}
/// <summary>
/// String representation of circle
/// </summary>
/// <returns>string representation of circle</returns>
public override string ToString()
{
return String.Format(CultureInfo.CurrentCulture, "({0},{1}, {2})", x, y, r);
}
/// <summary>
/// Equals operator
/// </summary>
/// <param name="obj">Circle to compare</param>
/// <returns>true if circles are equal</returns>
public override bool Equals(object obj)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (obj.GetType() != typeof(Circle))
return false;
Circle c = (Circle)obj;
return ((this.x == c.x) && (this.y == c.y) && (this.r == c.r));
}
/// <summary>
/// Equals operator
/// </summary>
/// <param name="c1">Circle to compare</param>
/// <param name="c2">Circle to compare</param>
/// <returns>True if circles are equal</returns>
public static bool operator ==(Circle c1, Circle c2)
{
return ((c1.x == c2.x) && (c1.y == c2.y) && (c1.r == c2.r));
}
/// <summary>
/// Not equals operator
/// </summary>
/// <param name="c1">Circle to compare</param>
/// <param name="c2">Circle to compare</param>
/// <returns>True if circles are not equal</returns>
public static bool operator !=(Circle c1, Circle c2)
{
return !(c1 == c2);
}
/// <summary>
/// Hash Code
/// </summary>
/// <returns>Hash code</returns>
public override int GetHashCode()
{
return x ^ y ^ r;
}
}
}
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