/// <summary>
/// 枝を作成する
/// </summary>
/// <returns></returns>
RefParticle MakeBranch(RefStructure s, int depth, RefParticle parent, float angle, float length)
{
var t = 1f - ((float)depth / _maxBranchDepth);
if (depth > 0)
{
depth--;
var position = parent.position + Utilities.Angle2Vector(angle * Mathf.Deg2Rad) * length;
var current = s.AddParticle(position, _branchJointSize, RandomGradient(_leafColor), _branchJointMaterialID);
// 次の枝へ
var deltaAngle = _branchAngleDeltaFactor * _branchAngleDeltaMultiplierCurve.Evaluate(t);
MakeBranch(s, depth, current, angle + deltaAngle, length * _branchDamping);
s.AddEdge(parent, current, _branchWidth, RandomGradient(_branchColor), _branchMaterialID);
if (Random.Range(0f, 1f) > 0.5f)
{
MakeBranch(s, depth, current, angle + Random.Range(-60f, 60f), length * _branchDamping);
}
return(current);
}
else
{
var position = parent.position + Utilities.Angle2Vector(angle * Mathf.Deg2Rad) * _leafSize.y;
var current = s.AddParticle(position, 0f, RandomGradient(_branchJointColor), _branchJointMaterialID);
// 本当の葉っぱ
s.AddEdge(parent, current, _leafSize.x, RandomGradient(_leafColor), _leafMaterialID);
return(null);
}
}
/// <summary>
/// 指定した構造体にパーティクルを追加する
/// </summary>
/// <param name="s"></param>
/// <param name="targets"></param>
static void AddParticles(RefStructure s, RefParticle[] targets)
{
Assert.IsNotNull(s);
Assert.IsNotNull(targets);
for (var i = 0; i < targets.Length; ++i)
{
var t = targets[i];
s.AddParticle(t.position, t.size, t.color, t.materialID);
}
}
public override RefParticle Add(RefStructure s, Vector2 p)
{
return(s.AddParticle(p, _size.random, _color.E_Random(), _materialID));
}
public override RefParticle Add(RefStructure s, Vector2 p, float t)
{
return(s.AddParticle(p, _size.Lerp(t), _color.Evaluate(t), _materialID));
}