| public static Dot ( Vector2 value1, Vector2 value2 ) : float | ||
| value1 | Vector2 | Source vector. |
| value2 | Vector2 | Source vector. |
| return | float | |
public static float Dot(Vector2 value1, Vector2 value2)
{
return value1.X * value2.X + value1.Y * value2.Y;
}
/// <summary>Calculates the dot product of two vectors and writes the result to a user-specified variable. If the two vectors are unit vectors, the dot product returns a floating point value between -1 and 1 that can be used to determine some properties of the angle between two vectors. For example, it can show whether the vectors are orthogonal, parallel, or have an acute or obtuse angle between them.</summary>| Vector2::Dot ( Vector2 &value1, Vector2 &value2, float &result ) : void |
public float DistanceToSquared(ref Vector3 vector, out Segment connectingSegment)
{
float segmentLength = (float)this.GetLength();
Vector2 normalizedLine = new Vector2(
(float)(Point2.X - Point1.X) / segmentLength,
(float)(Point2.Y - Point1.Y) / segmentLength);
Vector2 pointVector = new Vector2((float)(vector.X - Point1.X), (float)(vector.Y - Point1.Y));
float length = Vector2.Dot(pointVector, normalizedLine);
if (length < 0)
{
connectingSegment.Point1 = new Point(ref vector);
connectingSegment.Point2 = Point1;
return((float)connectingSegment.GetLengthSquared());
}
else if (length > segmentLength)
{
connectingSegment.Point1 = new Point(ref vector);
connectingSegment.Point2 = Point2;
return((float)connectingSegment.GetLengthSquared());
}
else
{
connectingSegment.Point1 = new Point(ref vector);
connectingSegment.Point2 = new Point(Point1.X + length * normalizedLine.X,
Point1.Y + length * normalizedLine.Y);
return((float)connectingSegment.GetLengthSquared());
}
}
