public Line(PointF p1, VectorF vec)
{
P1 = p1;
P2 = p1 + vec;
GeometryHelper.CalcABC(P1, P2, out A, out B, out C);
Type = LineType.Ray;
}
public PointF?Projection(PointF p)
{
var vec = new VectorF(A, B);
var cps = Cross(new Line(p, vec));
return(cps);
}
public bool HitTest(RectF rect, float scale)
{
if (_height == 0 || _width == 0)
{
return(false);
}
var height = _height / scale;
var hwidth = _width / (2 * scale);
var b = _origin + _direction * height;
var hdir = new VectorF(_direction.Y, -_direction.X);
var wl = hdir * hwidth;
var p1 = b + wl;
var p2 = b - wl;
var line1 = new Line(_origin, b);
var line2 = new Line(p1, p2);
if (_Contains(line1, line2, rect.BottomLeft, hwidth, height) ||
_Contains(line1, line2, rect.BottomRight, hwidth, height) ||
_Contains(line1, line2, rect.TopLeft, hwidth, height) ||
_Contains(line1, line2, rect.TopRight, hwidth, height))
{
return(true);
}
return(rect.Contains(_origin) || rect.Contains(p1) || rect.Contains(p2));
}
public VectorF Transform(VectorF vector)
{
VectorF newVector = vector;
MultiplyVector(ref newVector._x, ref newVector._y);
return(newVector);
}
public _Arrow(PointF origin, float height, float width, VectorF direction, Color fillColor)
{
_origin = origin;
_height = height;
_width = width;
_direction = direction;
_fillColor = fillColor;
}
public void Offset(VectorF offsetVector)
{
if (IsEmpty)
{
throw new System.InvalidOperationException();
}
_x += offsetVector._x;
_y += offsetVector._y;
}
public override bool Equals(object o)
{
if ((null == o) || !(o is VectorF))
{
return(false);
}
VectorF value = (VectorF)o;
return(VectorF.Equals(this, value));
}
private RectF _GetBounds(float scale)
{
if (_height == 0 || _width == 0)
{
return(RectF.Empty);
}
var height = _height / scale;
var hwidth = _width / (2 * scale);
var p = _origin + _direction * height;
var hdir = new VectorF(_direction.Y, -_direction.X);
var wl = hdir * hwidth;
var bound = RectF.Empty;
bound.Union(new RectF(_origin, p + wl));
bound.Union(new RectF(_origin, p - wl));
return(bound);
}
public bool HitTest(PointF p, float sensitive, float scale)
{
if (_height == 0 || _width == 0)
{
return(false);
}
var height = _height / scale;
var hwidth = _width / (2 * scale);
var b = _origin + _direction * height;
var hdir = new VectorF(_direction.Y, -_direction.X);
var wl = hdir * hwidth;
var p1 = b + wl;
var p2 = b - wl;
var line1 = new Line(_origin, b);
var line2 = new Line(p1, p2);
return(_Contains(line1, line2, p, hwidth, height));
}
public static Float Determinant(VectorF vector1, VectorF vector2)
{
return(vector1._x * vector2._y - vector1._y * vector2._x);
}
public static bool Equals(VectorF vector1, VectorF vector2)
{
return(vector1.X.Equals(vector2.X) &&
vector1.Y.Equals(vector2.Y));
}
public static VectorF Multiply(VectorF vector, MatrixF matrix)
{
return(matrix.Transform(vector));
}
public static Float Multiply(VectorF vector1, VectorF vector2)
{
return(vector1._x * vector2._x + vector1._y * vector2._y);
}
public static RectF Offset(RectF rect, VectorF offsetVector)
{
rect.Offset(offsetVector.X, offsetVector.Y);
return(rect);
}
public static VectorF Divide(VectorF vector, Float scalar)
{
return(vector * (1.0f / scalar));
}
public static PointF Add(VectorF vector, PointF point)
{
return(new PointF(point._x + vector._x, point._y + vector._y));
}
public static VectorF Add(VectorF vector1, VectorF vector2)
{
return(new VectorF(vector1._x + vector2._x,
vector1._y + vector2._y));
}
public bool Equals(VectorF value)
{
return(VectorF.Equals(this, value));
}
public RectF(PointF point,
VectorF vector) : this(point, point + vector)
{
}
public static PointF Subtract(PointF point, VectorF vector)
{
return(new PointF(point._x - vector._x, point._y - vector._y));
}
public static Float CrossProduct(VectorF vector1, VectorF vector2)
{
return(vector1._x * vector2._y - vector1._y * vector2._x);
}
public void Translate(VectorF vector, bool isRefresh = true)
{
Translate(vector.X, vector.Y, isRefresh);
}
public static VectorF Subtract(VectorF vector1, VectorF vector2)
{
return(new VectorF(vector1._x - vector2._x,
vector1._y - vector2._y));
}
public static VectorF Multiply(Float scalar, VectorF vector)
{
return(new VectorF(vector._x * scalar,
vector._y * scalar));
}
public void DrawArrow(Color fillColor, PointF origin, float height, float width, VectorF direction, bool isFixedSize)
{
fillColor = _transform.Transform(fillColor);
origin = _transform.Transform(origin);
direction = _transform.Transform(-direction);
direction.Normalize();
if (isFixedSize)
{
_primitives.Add(new _Arrow(origin, height, width, direction, fillColor));
}
else
{
var p1 = origin + direction * height;
var v = new VectorF(direction.Y, -direction.X);
var wd = v * width / 2;
var p2 = p1 + wd;
p1 -= wd;
var geo = new _ComplexGeometry();
var subgeo = new _SimpleGeometry(PenF.NULL, fillColor, origin, false);
subgeo.StreamTo(new _Line(origin, p1, PenF.NULL));
subgeo.StreamTo(new _Line(p1, p2, PenF.NULL));
subgeo.StreamTo(new _Line(p2, origin, PenF.NULL));
geo.AddChild(subgeo);
geo.Close();
_primitives.Add(geo);
}
}
internal VectorF Transform(VectorF vector)
{
return(_matrix.Transform(vector));
}
