VStructure Build()
{
var s = new VStructure();
var stepSize = Mathf.PI * 2f / resolution;
// パーティクル
for (var i = 0; i < resolution; ++i)
{
var step = stepSize * i;
var x = Mathf.Cos(step) * radius;
var y = Mathf.Sin(step) * radius;
s.AddParticle(new Vector2(x, y), 0.2f);
}
// エッジ
for (var i = 0; i < resolution; ++i)
{
// 前後のつなぎ
s.AddEdge(i, (i + 1) % resolution);
// 支持棒
for (var j = 0; j < supports.Length; ++j)
{
var i2 = (i + supports[j]) % resolution;
s.AddEdge(i, i2);
}
}
return(s);
}
public override VStructure CreateStructure(Matrix4x4 toWorld)
{
var s = new VStructure();
var stepSize = Mathf.PI * 2f / resolution;
// パーティクル
for (var i = 0; i < resolution; ++i)
{
var step = stepSize * i;
var x = Mathf.Cos(step) * radius;
var y = Mathf.Sin(step) * radius;
s.AddParticle(toWorld.MultiplyPoint3x4(new Vector2(x, y)), 0.2f);
}
// エッジ
for (var i = 0; i < resolution; ++i)
{
// 前後のつなぎ
s.AddEdge(i, (i + 1) % resolution);
// 支持棒
for (var j = 0; j < supports.Length; ++j)
{
var i2 = (i + supports[j]) % resolution;
s.AddEdge(i, i2);
}
}
return(s);
}
int MakeBranch(VStructure s, int depth, int originID, int parentID, Vector2 parentPosition, float angle, float length)
{
var position = parentPosition + Utilities.Angle2Vector(angle) * length;
var currentID = s.AddParticle(position, 0.1f);
s.AddEdge(parentID, currentID, 0.1f, _branchGradient.Evaluate(Random.Range(0f, 1f)));
depth--;
if (depth > 0)
{
var branchAngle = (Random.Range(0f, 1f) < 0.5f ? _subBranchAngle : -_subBranchAngle) * Mathf.Rad2Deg;
var branchDir = Utilities.Angle2Vector(angle + branchAngle) * length * _subBranchLengthMutiplier;
var branchID = s.AddParticle(branchDir + position, 0.2f, _leafGradient.Evaluate(Random.Range(0f, 1f)));
s.AddEdge(currentID, branchID, 0.1f, _branchGradient.Evaluate(Random.Range(0f, 1f)));
s.AddEdge(parentID, branchID, 0.025f, _branchGradient.Evaluate(Random.Range(0f, 1f)));
var nextID = MakeBranch(s, depth, originID, currentID, position, angle, length * _lengthDamping);
s.AddEdge(parentID, nextID, 0.025f, _branchGradient.Evaluate(Random.Range(0f, 1f)));
}
return(currentID);
}
public override VStructure CreateStructure(Matrix4x4 toWorld)
{
var s = new VStructure();
// まずは使用する座標のリストを作成
var positions = new Vector2[_mainBranchResolution];
Vector2 position = new Vector2(0f, 0f);
positions[0] = toWorld.MultiplyPoint3x4(position);
float length = baseLength;
float angle = baseAngle;
for (var i = 1; i < _mainBranchResolution; ++i)
{
var t = (float)i / _mainBranchResolution;
var lengthMultiplier = _mainBranchLengthMultiplierhCurve.Evaluate(t);
var deltaAngle = (_inverseMainBranchDeltaAngle ? -1 : 1) * _mainBranchDeltaAngleCurve.Evaluate(t);
length = baseLength * lengthMultiplier;
angle += deltaAngle;
position += Utilities.Angle2Vector(angle * Mathf.Deg2Rad) * length;
positions[i] = toWorld.MultiplyPoint3x4(position);
}
// 座標を元にパーティクルとエッジを追加
for (var i = 0; i < positions.Length; ++i)
{
var t = (float)i / positions.Length;
s.AddParticle(
positions[i],
_baseLeafSize * _leafSizeMultiplierCurve.Evaluate(t),
_leafGradient.Evaluate(Random.Range(0f, 1f))
);
}
// エッジの作成
for (var i = 1; i < positions.Length; ++i)
{
s.AddEdge(i - 1, i, _mainBranchWidth, _mainBranchGradient.Evaluate(Random.Range(0f, 1f)));
// サポートの作成
for (var j = 0; j < _supportEdges.Length; ++j)
{
var t = _supportEdges[j];
if (i >= t.supportInterval)
{
s.AddEdge(i - t.supportInterval, i, t.supportWidth, _mainBranchGradient.Evaluate(Random.Range(0f, 1f)));
}
}
}
// 根本をピンどめ
s.AddAfterStep(new VPin(0, positions[0]));
s.AddAfterStep(new VPin(1, positions[1]));
return(s);
}
/// <summary>
/// 枝を一つ作成する
/// </summary>
/// <returns></returns>
int MakeBranch(
VStructure structure,
int depth,
int parentID,
Vector2 parentPosition,
float angle,
float length)
{
// パーティクルの大きさは幹と葉で分ける
var size = 0f;
Color32 color;
if (depth == 1)
{
// 葉
size = Random.Range(_minSize, _maxSize);
color = _leafColor.Evaluate(Random.Range(0f, 1f));
}
else
{
// 幹
size = 0f;
color = _branchColor;
}
var position = parentPosition + Utilities.Angle2Vector(angle) * length;
var currentID = structure.AddParticle(position, size, color);
structure.AddEdge(parentID, currentID, _branchWidth, _branchColor);
depth--;
// 最大深度未満の場合は次の枝へ
if (depth > 0)
{
// child.hide = true;
// branch A
int aID;
if ((length * Random.Range(1f, 2f)) / _initialLength > lengthBranchAThreshold)
{
aID = MakeBranch(structure, depth, currentID, position, angle + Random.Range(angleOffsetMin, angleOffsetMax), length * Random.Range(lengthMin1, lengthMax1));
}
else
{
aID = MakeBranch(structure, depth, currentID, position, angle + Random.Range(angleOffsetMin, angleOffsetMax), length * Random.Range(lengthMin2, lengthMax2));
}
// branch B
int bID;
if ((length * Random.Range(1f, 2f)) / _initialLength > lengthBranchBThreshold)
{
bID = MakeBranch(structure, depth, currentID, position, angle - Random.Range(angleOffsetMin, angleOffsetMax), length * Random.Range(lengthMin1, lengthMax1));
}
else
{
bID = MakeBranch(structure, depth, currentID, position, angle - Random.Range(angleOffsetMin, angleOffsetMax), length * Random.Range(lengthMin2, lengthMax2));
}
structure.AddEdge(currentID, aID, _branchWidth);
structure.AddEdge(currentID, bID, _branchWidth);
structure.AddEdge(parentID, aID, 0.025f, _branchColor);
structure.AddEdge(parentID, bID, 0.025f, _branchColor);
structure.AddEdge(aID, bID, 0.025f, _branchColor);
}
return(currentID);
}