//////////////TRANSFORM_METHODS////////////////
///////////////////////////////////////////////
/////////////INTERSECTION_METHODS//////////////
public override GlPointR2[] getIntersection(GlLineR2 L)
{
GlVectorR2 translatedVector = new GlVectorR2(L.DirectVector).getRotatedVector(this.SIN, this.COS);
GlPointR2 FP = L.PointOfLine.getPointTranslatedToRotatedSystem(this.SIN, this.COS, this.Center);
GlPointR2 SP = translatedVector.fromPointToPoint(FP);
float fPartRes = (float)Math.Pow(AdditionalHalfAixis * (FP.X - SP.X), 2.0);
float sPartRes = (float)Math.Pow(RealHalfAixis * (FP.Y - SP.Y), 2.0);
float tPartRes = FP.X * SP.Y - SP.X * FP.Y;
float sqrtPart = RealHalfAixis * AdditionalHalfAixis * (FP.X - SP.X) * (float)Math.Sqrt(fPartRes - sPartRes + Math.Pow(tPartRes, 2.0));
float x1 = (-(float)Math.Pow(RealHalfAixis, 2.0) * (FP.Y - SP.Y) * tPartRes + sqrtPart) / (sPartRes - fPartRes);
float x2 = (-(float)Math.Pow(RealHalfAixis, 2.0) * (FP.Y - SP.Y) * tPartRes - sqrtPart) / (sPartRes - fPartRes);
float y1 = AdditionalHalfAixis * (float)Math.Sqrt(x1 * x1 - Math.Pow(RealHalfAixis, 2.0)) / RealHalfAixis;
float y2 = -AdditionalHalfAixis * (float)Math.Sqrt(x2 * x2 - Math.Pow(RealHalfAixis, 2.0)) / RealHalfAixis;
float y3 = -AdditionalHalfAixis * (float)Math.Sqrt(x1 * x1 - Math.Pow(RealHalfAixis, 2.0)) / RealHalfAixis;
float y4 = AdditionalHalfAixis * (float)Math.Sqrt(x2 * x2 - Math.Pow(RealHalfAixis, 2.0)) / RealHalfAixis;
GlPointR2[] RP =
{
new GlPointR2(x1, y1).getTranslatedBackPoint(this.SIN, this.COS, this.Center),
new GlPointR2(x2, y2).getTranslatedBackPoint(this.SIN, this.COS, this.Center),
new GlPointR2(x1, y3).getTranslatedBackPoint(this.SIN, this.COS, this.Center),
new GlPointR2(x2, y4).getTranslatedBackPoint(this.SIN, this.COS, this.Center)
};
List <GlPointR2> res = new List <GlPointR2>();
for (int i = 0; i < RP.Length; i++)
{
bool a = this.isPointBelongs(RP[i]);
bool b = L.isPointBelongs(RP[i]);
if (a && b)
{
res.Add(RP[i]);
}
}
return(res.ToArray());
}
//////////////TRANSFORM_METHODS////////////////
///////////////////////////////////////////////
/////////////INTERSECTION_METHODS//////////////
public override GlPointR2[] getIntersection(GlLineR2 L)
{
if (L == null || L.pointOfLine.isNullPoint())
{
return new GlPointR2[] { }
}
;
if (GlPointR2.Equals(this.pointOfLine, L.pointOfLine))//already have a result
{
return new GlPointR2[] { new GlPointR2(L.pointOfLine) }
}
;
bool isL1Point = this.DirectVector.isNullVector();
bool isL2Point = L.DirectVector.isNullVector();
if (isL1Point && isL2Point)//same points were catched in previous step
{
return new GlPointR2[] { }
}
;
if (this.DirectVector.isNullVector() && L.isPointBelongs(this.pointOfLine))//line and a point
{
return new GlPointR2[] { new GlPointR2(this.pointOfLine) }
}
;
if (L.DirectVector.isNullVector() && this.isPointBelongs(L.pointOfLine))//line and a point
{
return new GlPointR2[] { new GlPointR2(L.pointOfLine) }
}
;
if (GlLineR2.Equals(this, L))//lines are identical
{
return new GlPointR2[] { new GlPointR2(this.pointOfLine), new GlPointR2(L.PointOfLine) }
}
;
if (GlVectorR2.isParallel(this.DirectVector, L.DirectVector))//lines are parallel
{
return new GlPointR2[] { }
}
;
if (L.DirectVector.deltaX == 0)//L2 is parallel to Y axis
{
return new GlPointR2[] { new GlPointR2(L.pointOfLine.X, this.DirectVector.deltaY * (L.pointOfLine.X - this.pointOfLine.X) / this.DirectVector.deltaX + this.pointOfLine.Y) }
}
;
if (this.DirectVector.deltaY == 0)//L1 is parallel to X axis
{
return new GlPointR2[] { new GlPointR2(L.DirectVector.deltaX * (this.pointOfLine.Y - L.pointOfLine.Y) / L.DirectVector.deltaY + L.pointOfLine.X, this.pointOfLine.Y) }
}
;
float v2RatYX = L.DirectVector.deltaY / L.DirectVector.deltaX;
float v1RatXY = this.DirectVector.deltaX / this.DirectVector.deltaY;
float yInter = (v1RatXY * v2RatYX * this.pointOfLine.Y - v2RatYX * this.pointOfLine.X + v2RatYX * L.pointOfLine.X - L.pointOfLine.Y) / (v1RatXY * v2RatYX - 1);
float xInter = v1RatXY * (yInter - this.pointOfLine.Y) + this.pointOfLine.X;
return(new GlPointR2[] { new GlPointR2(xInter, yInter) });//common situation
}
