private static void ShiftPoints(float irregularity)
{
for (var i = 0; i < pointCount; i++)
{
var point = points[i];
var delta = Random.insideUnitCircle.normalized * FindMaxMovement(point.X, point.Y) * irregularity;
var deltaX = Mathf.RoundToInt(delta.x);
var deltaY = Mathf.RoundToInt(delta.y);
if (point.X <= xMin || point.X >= xMax)
{
deltaX = 0;
}
if (point.Y <= yMin || point.Y >= yMax)
{
deltaY = 0;
}
if (deltaX != 0 || deltaY != 0)
{
var newPoint = new D2dVector2(point.X + deltaX, point.Y + deltaY);
MovePoints(point, newPoint);
points[i] = newPoint;
}
}
}
private static void TryMovePoint(ref D2dVector2 point, D2dVector2 oldPoint, D2dVector2 newPoint)
{
if (point.X == oldPoint.X && point.Y == oldPoint.Y)
{
point.X = newPoint.X;
point.Y = newPoint.Y;
}
}
private static void MovePoints(D2dVector2 oldPoint, D2dVector2 newPoint)
{
for (var i = 0; i < quadCount; i++)
{
var quad = quads[i];
TryMovePoint(ref quad.BL, oldPoint, newPoint);
TryMovePoint(ref quad.BR, oldPoint, newPoint);
TryMovePoint(ref quad.TL, oldPoint, newPoint);
TryMovePoint(ref quad.TR, oldPoint, newPoint);
quads[i] = quad;
}
}
public void AddTriangle(D2dVector2 a, D2dVector2 b, D2dVector2 c)
{
if (a.Y != b.Y || a.Y != c.Y)
{
//var z = (a.V + b.V + c.V) / 3.0f;
//var z1 = Vector3.MoveTowards(a.V, z, 1.0f);
//var z2 = Vector3.MoveTowards(b.V, z, 1.0f);
//var z3 = Vector3.MoveTowards(c.V, z, 1.0f);
//Debug.DrawLine(z1, z2, Color.red, 10.0f);
//Debug.DrawLine(z2, z3, Color.red, 10.0f);
//Debug.DrawLine(z3, z1, Color.red, 10.0f);
// Make a highest, and c lowest
if (b.Y > a.Y)
{
D2dHelper.Swap(ref a, ref b);
}
if (c.Y > a.Y)
{
D2dHelper.Swap(ref c, ref a);
}
if (c.Y > b.Y)
{
D2dHelper.Swap(ref b, ref c);
}
var fth = a.Y - c.Y; // Full triangle height
var tth = a.Y - b.Y; // Top triangle height
var bth = b.Y - c.Y; // Bottom triangle height
// Find a to c intercept along b plane
var inx = c.X + (a.X - c.X) * D2dHelper.Divide(bth, fth);
var d = new D2dVector2((int)inx, b.Y);
// Top triangle
var abs = D2dHelper.Divide(a.X - b.X, tth); // A/B slope
var ads = D2dHelper.Divide(a.X - d.X, tth); // A/D slope
AddTriangle(b.X, d.X, abs, ads, b.Y, 1, tth);
// Bottom triangle
var cbs = D2dHelper.Divide(c.X - b.X, bth); // C/B slope
var cds = D2dHelper.Divide(c.X - d.X, bth); // C/D slope
AddTriangle(b.X, d.X, cbs, cds, b.Y, -1, bth);
}
}
private static void TryAddPoint(D2dVector2 newPoint)
{
for (var i = 0; i < pointCount; i++)
{
var point = points[i];
if (point.X == newPoint.X && point.Y == newPoint.Y)
{
return;
}
}
if (points.Count > pointCount)
{
points[pointCount] = newPoint;
}
else
{
points.Add(newPoint);
}
pointCount += 1;
}
protected override void OnAlphaDataSubset(D2dVector2 size, D2dVector2 offset)
{
base.OnAlphaDataSubset(size, offset);
Rebuild();
}
protected virtual void OnAlphaDataSubset(D2dVector2 size, D2dVector2 offset)
{
UpdateBeforeBuild();
}
