/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
LitMath.Vector2 pnt = _center + new LitMath.Vector2(_radius, 0);
_center = transform * _center;
_radius = (transform * pnt - _center).length;
}
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
for (int i = 0; i < this.NumberOfVertices; ++i)
{
_vertices[i] = transform * _vertices[i];
}
}
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
LitMath.Vector2 refPnt = _basePoint + _direction;
_basePoint = transform * _basePoint;
refPnt = transform * refPnt;
_direction = (refPnt - _basePoint).normalized;
}
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
LitMath.Vector2 spnt = transform * this.startPoint;
LitMath.Vector2 epnt = transform * this.endPoint;
LitMath.Vector2 mpnt = transform * this.middlePoint;
_center = transform * _center;
_radius = (spnt - _center).length;
double sAngle = LitMath.Vector2.SignedAngleInRadian(
new LitMath.Vector2(1, 0),
spnt - _center);
double eAngle = LitMath.Vector2.SignedAngleInRadian(
new LitMath.Vector2(1, 0),
epnt - _center);
if (LitMath.Vector2.SignedAngle(spnt - _center, mpnt - _center) >= 0)
{
this.startAngle = sAngle;
this.endAngle = eAngle;
}
else
{
this.startAngle = eAngle;
this.endAngle = sAngle;
}
}
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
LitMath.Vector2 pntX = _center + new LitMath.Vector2(_radiusX, 0);
LitMath.Vector2 pntY = _center + new LitMath.Vector2(0, _radiusY);
_center = transform * _center;
_radiusX = (transform * pntX - _center).length;
_radiusY = (transform * pntY - _center).length;
}
/// <summary>
/// 刷新结果图元
/// </summary>
private void UpdateResultEntities()
{
LitMath.Matrix3 mirrorMatrix = MathUtils.MirrorMatrix(
new LitMath.Line2(_mirrorLine.startPoint, _mirrorLine.endPoint));
_resultEntities.Clear();
foreach (Entity entity in _entities)
{
Entity copy = entity.Clone() as Entity;
copy.TransformBy(mirrorMatrix);
_resultEntities.Add(copy);
}
}
/// <summary>
/// 镜像矩阵
/// </summary>
internal static LitMath.Matrix3 MirrorMatrix(LitMath.Line2 mirrorLine)
{
LitMath.Vector2 lineDir = mirrorLine.direction;
LitMath.Matrix3 matPos1 = LitMath.Matrix3.Translate(-mirrorLine.startPoint);
double rotAngle = LitMath.Vector2.SignedAngle(lineDir, new LitMath.Vector2(1, 0));
LitMath.Matrix3 matRot1 = LitMath.Matrix3.Rotate(rotAngle);
LitMath.Matrix3 mirrorMatX = new LitMath.Matrix3(
1, 0, 0,
0, -1, 0,
0, 0, 1);
LitMath.Matrix3 matRot2 = LitMath.Matrix3.Rotate(-rotAngle);
LitMath.Matrix3 matPos2 = LitMath.Matrix3.Translate(mirrorLine.startPoint);
return(matPos2 * matRot2 * mirrorMatX * matRot1 * matPos1);
}
/// <summary> /// Transform /// 前提: 变换不改变图元整体形状 /// </summary> public abstract void TransformBy(LitMath.Matrix3 transform);
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
_position = transform * _position;
}
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
_startPoint = transform * _startPoint;
_endPoint = transform * _endPoint;
}
/// <summary>
/// Transform
/// </summary>
public override void TransformBy(LitMath.Matrix3 transform)
{
}
