public override bool Paint(float dt, IPaintable canvas, IGridManager gridManager, Painter.InputState inputState, float minVal, float maxVal, Rect rect, Matrix4x4 TRS)
{
bool dirty = false;
var pos = inputState.GridPosition;
var baseCell = gridManager.GetCell(pos);
int stealCells = 2;
float stolenValue = 0;
for (var i = -stealCells; i <= stealCells; i += 1)
{
for (var j = -stealCells; j <= stealCells; j += 1)
{
if (i == 0 && j == 0)
{
continue;
}
var offset = gridManager.GetOffset(i, j);
var value = canvas.GetValue(baseCell + offset);
if (value <= 0)
{
continue;
}
var stealAmount = Mathf.Min(value, Strength);
stolenValue += stealAmount;
canvas.SetValue(baseCell + offset, value - stealAmount);
dirty = true;
}
}
canvas.SetValue(baseCell, canvas.GetValue(baseCell) + stolenValue);
return(dirty);
}
public override bool Paint(float dt, IPaintable canvas, IGridManager gridManager, Painter.InputState inputState, float minVal, float maxVal, Rect rect, Matrix4x4 TRS)
{
var dirty = false;
var scaledRad = gridManager.GetGridSize() * Radius;
for (var i = -scaledRad; i <= scaledRad; i += gridManager.GetGridSize())
{
for (var j = -scaledRad; j <= scaledRad; j += gridManager.GetGridSize())
{
var pos = inputState.GridPosition + new Vector3(i, 0, j);
var cell = gridManager.GetCell(pos);
if (rect.size.magnitude > 0 && !rect.Contains(pos.xz()))
{
canvas.RemoveCell(cell);
continue;
}
var normalisedDist = 1f;
if (BrushShape == EBrushShape.Circle)
{
var circleDist = Vector2.Distance(inputState.GridPosition.xz(), pos.xz());
if (circleDist > scaledRad)
{
continue;
}
normalisedDist = circleDist / scaledRad;
}
else
{
normalisedDist = Mathf.Abs(inputState.GridPosition.x - pos.x) +
Mathf.Abs(inputState.GridPosition.y - pos.y);
normalisedDist /= scaledRad;
}
var falloff = 1f;
if (!float.IsNaN(normalisedDist))
{
falloff = Falloff.Evaluate(normalisedDist);
}
var val = Strength * falloff;
//var existingVal = canvas.GetValue(cell);
var sum = 0f;
for (var iter = 0; iter < Iterations; ++iter)
{
for (var u = -1; u <= 1; ++u)
{
for (var v = -1; v <= 1; ++v)
{
var neighbourPos = inputState.GridPosition + new Vector3(i + u * gridManager.GetGridSize(), 0, j + v * gridManager.GetGridSize());
var neighbourCell = gridManager.GetCell(neighbourPos);
sum += canvas.GetValue(neighbourCell);
}
}
}
val = Mathf.Lerp(sum / 9, val, Strength * Flow * dt);
val = Mathf.Clamp(val, minVal, maxVal);
canvas.SetValue(cell, val);
dirty = true;
}
}
return(dirty);
}