public void Translate(Vector3D translationVector)
{
for (int i = 0; i < this.vertices.Count; i++)
{
this.vertices[i] += translationVector;
}
}
public Vector3D GetNormal()
{
Vector3D center = this.GetCenter();
Vector3D A = new Vector3D(center.X + this.Radius, center.Y, center.Z),
B = new Vector3D(center.X, center.Y + this.Radius, center.Z);
Vector3D normal = Vector3D.CrossProduct(center - A, center - B);
normal.Normalize();
return normal;
}
public static double DotProduct(Vector3D a, Vector3D b)
{
double result = 0;
for (int d = 0; d < 3; d++)
{
result += a[d] * b[d];
}
return result;
}
public void Scale(Vector3D scaleCenter, double scaleFactor)
{
for (int i = 0; i < this.vertices.Count; i++)
{
Vector3D centeredCurrent = this.vertices[i] - scaleCenter;
Vector3D scaledCenteredCurrent = centeredCurrent * scaleFactor;
this.vertices[i] = scaledCenteredCurrent + scaleCenter;
}
}
public virtual Vector3D GetCenter()
{
Vector3D verticesSum = new Vector3D(0, 0, 0);
for (int i = 0; i < this.vertices.Count; i++)
{
verticesSum += this.vertices[i];
}
return verticesSum / this.vertices.Count;
}
public void RotateInXY(Vector3D rotCenter, double angleDegrees)
{
for (int i = 0; i < this.vertices.Count; i++)
{
Vector3D centeredCurrent = this.vertices[i] - rotCenter;
double angleRads = angleDegrees * Math.PI / 180.0;
Vector3D rotatedCenteredCurrent = new Vector3D(
centeredCurrent.X * Math.Cos(angleRads) - centeredCurrent.Y * Math.Sin(angleRads),
centeredCurrent.X * Math.Sin(angleRads) + centeredCurrent.Y * Math.Cos(angleRads),
centeredCurrent.Z
);
this.vertices[i] = rotatedCenteredCurrent + rotCenter;
}
}
public Cylinder(Vector3D bottom, Vector3D top, double radius)
: base(top, bottom)
{
this.Radius = radius;
}
public Circle(Vector3D center, double radius)
: base(center)
{
this.Radius = radius;
}
public static Vector3D CrossProduct(Vector3D a, Vector3D b)
{
double crossX = a.Y * b.Z - a.Z * b.Y;
double crossY = a.Z * b.X - a.X * b.Z;
double crossZ = a.X * b.Y - a.Y * b.X;
return new Vector3D(crossX, crossY, crossZ);
}
public static double GetAngleDegrees(Vector3D a, Vector3D b)
{
return Math.Acos(DotProduct(a, b) / a.Magnitude * b.Magnitude);
}
public Triangle(Vector3D a, Vector3D b, Vector3D c)
: base(a, b, c)
{
}
public LineSegment(Vector3D a, Vector3D b)
: base(a, b)
{
this.length = (this.A - this.B).Magnitude;
}