protected void KochGenerate(Vector3[] positions, bool outwards, float generatorMultiplyer)
{
_lineSegment.Clear();
for (int i = 0; i < positions.Length - 1; i++)
{
Linesegment line = new Linesegment();
line.StartPosition = positions[i];
if (i == positions.Length - 1)
{
line.EndPosition = positions[0];
}
else
{
line.EndPosition = positions[i + 1];
}
line.Direction = (line.EndPosition - line.StartPosition).normalized;
line.Length = Vector3.Distance(line.EndPosition, line.StartPosition);
_lineSegment.Add(line);
}
List <Vector3> newPos = new List <Vector3>();
List <Vector3> targetPos = new List <Vector3>();
for (int i = 0; i < _lineSegment.Count; i++)
{
newPos.Add(_lineSegment[i].StartPosition);
targetPos.Add(_lineSegment[i].StartPosition);
for (int j = 1; j < _keys.Length - 1; j++)
{
float moveAmount = _lineSegment[i].Length * _keys[j].time;
float heightAmount = (_lineSegment[i].Length * _keys[j].value) * generatorMultiplyer;
Vector3 movePos = _lineSegment[i].StartPosition + (_lineSegment[i].Direction * moveAmount);
Vector3 Dir;
if (outwards)
{
Dir = Quaternion.AngleAxis(-90, _rotateAxis) * _lineSegment[i].Direction;
}
else
{
Dir = Quaternion.AngleAxis(90, _rotateAxis) * _lineSegment[i].Direction;
}
newPos.Add(movePos);
targetPos.Add(movePos + (Dir * heightAmount));
}
}
newPos.Add(_lineSegment[0].StartPosition);
targetPos.Add(_lineSegment[0].StartPosition);
_position = new Vector3[newPos.Count];
_targetPosition = new Vector3[newPos.Count];
_position = newPos.ToArray();
_targetPosition = targetPos.ToArray();
_bezierPosition = BezierCurve(_targetPosition, _bezierVertexCount);
_generationCount++;
}
// Bullet pattern generation taken from user Felsir on gamedev.stackexchange
// from the following post https://gamedev.stackexchange.com/questions/124688/how-to-create-shockwave-of-objects-in-other-shapes-than-circle
private IntersectionResult ProcessIntersection(Linesegment linesegment, Vector2 origin, double theta)
{
//since this is linesegment versus linesegment code; transform the ray into a point somewhere far away...
Vector2 rayend = origin + new Vector2((float)Math.Cos(theta), (float)Math.Sin(theta)) * 1000;
float ua = (rayend.X - origin.X) * (linesegment.point1.Y - origin.Y) - (rayend.Y - origin.Y) * (linesegment.point1.X - origin.X);
float ub = (linesegment.point2.X - linesegment.point1.X) * (linesegment.point1.Y - origin.Y) - (linesegment.point2.Y - linesegment.point1.Y) * (linesegment.point1.X - origin.X);
float denominator = (rayend.Y - origin.Y) * (linesegment.point2.X - linesegment.point1.X) - (rayend.X - origin.X) * (linesegment.point2.Y - linesegment.point1.Y);
IntersectionResult result = new IntersectionResult {
intersection = false, coincident = false, intersectionPoint = Vector2.Zero
};
if (Math.Abs(denominator) <= 0.00001f) // epsilon, check if the point is on the line (within a very small distance for rounding errors).
{
if (Math.Abs(ua) <= 0.00001f && Math.Abs(ub) <= 0.00001f)
{
result.intersection = true;
result.coincident = true;
result.intersectionPoint = (linesegment.point1 + linesegment.point2) / 2;
}
}
else
{
ua /= denominator;
ub /= denominator;
if (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)
{
result.intersection = true;
result.intersectionPoint.X = linesegment.point1.X + ua * (linesegment.point2.X - linesegment.point1.X);
result.intersectionPoint.Y = linesegment.point1.Y + ua * (linesegment.point2.Y - linesegment.point1.Y);
}
}
return(result);
}
