/// <summary>
/// Function to update a point in the triangle.
/// </summary>
/// <param name="pointIndex">Index of the point.</param>
/// <param name="point">Point information.</param>
/// <remarks>The <paramref name="pointIndex"/> must be between 0 and 2 (inclusive) or an exception will be raised.</remarks>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown when the pointIndex parameter is less than 0 or greater than 2.</exception>
public void SetPoint(int pointIndex, GorgonPolygonPoint point)
{
if ((pointIndex < 0) ||
(pointIndex > 2))
{
throw new ArgumentOutOfRangeException("pointIndex");
}
_points[pointIndex] = point;
NeedsTextureUpdate = true;
}
/// <summary>
/// Function to draw an unfilled triangle.
/// </summary>
/// <param name="position">Position of the triangle.</param>
/// <param name="point1">First point in the triangle.</param>
/// <param name="point2">Second point in the triangle.</param>
/// <param name="point3">Third point in the triangle.</param>
/// <param name="thickness">Line thickness.</param>
/// <param name="texture">Texture to apply to the triangle.</param>
public void DrawTriangle(Vector2 position, GorgonPolygonPoint point1, GorgonPolygonPoint point2, GorgonPolygonPoint point3, Vector2 thickness, GorgonTexture2D texture)
{
SetStates(_triangle);
_triangle.IsFilled = false;
_triangle.Position = position;
_triangle.SetPoint(0, point1);
_triangle.SetPoint(1, point2);
_triangle.SetPoint(2, point3);
_triangle.Texture = texture;
_triangle.LineThickness = thickness;
_triangle.Draw();
}
/// <summary>
/// Function to draw a filled triangle.
/// </summary>
/// <param name="position">Position of the triangle.</param>
/// <param name="point1">First point in the triangle.</param>
/// <param name="point2">Second point in the triangle.</param>
/// <param name="point3">Third point in the triangle.</param>
/// <param name="texture">Texture to apply to the triangle.</param>
public void FilledTriangle(Vector2 position, GorgonPolygonPoint point1, GorgonPolygonPoint point2, GorgonPolygonPoint point3, GorgonTexture2D texture)
{
SetStates(_triangle);
_triangle.IsFilled = true;
_triangle.Position = position;
_triangle.SetPoint(0, point1);
_triangle.SetPoint(1, point2);
_triangle.SetPoint(2, point3);
_triangle.Texture = texture;
_triangle.LineThickness = new Vector2(1.0f);
_triangle.Draw();
}
/// <summary>
/// Function to create a new triangle object.
/// </summary>
/// <param name="name">Name of the triangle.</param>
/// <param name="point1">First point in the triangle.</param>
/// <param name="point2">Second point in the triangle.</param>
/// <param name="point3">Third point in the triangle.</param>
/// <param name="filled">TRUE to create a filled triangle, FALSE to create an unfilled triangle.</param>
/// <returns>A new triangle primitive object.</returns>
/// <remarks>The points defined in the triangle use relative coordinates, and are offset from an origin that is defined by the <see cref="P:GorgonLibrary.Renderers.GorgonTriangle.Anchor">Anchor</see> property.</remarks>
/// <exception cref="System.ArgumentNullException">Thrown when the <paramref name="name"/> parameter is NULL (Nothing in VB.Net).</exception>
/// <exception cref="System.ArgumentException">Thrown when the name parameter is an empty string.</exception>
public GorgonTriangle CreateTriangle(string name, GorgonPolygonPoint point1, GorgonPolygonPoint point2, GorgonPolygonPoint point3, bool filled)
{
if (name == null)
{
throw new ArgumentNullException("name");
}
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentException(Resources.GOR2D_PARAMETER_MUST_NOT_BE_EMPTY, "name");
}
var result = new GorgonTriangle(_gorgon2D, name)
{
IsFilled = filled
};
result.SetPoint(0, point1);
result.SetPoint(1, point2);
result.SetPoint(2, point3);
return(result);
}
