/// <summary>
/// Raised by <see cref="OnTool"/> to perform painting upon pressing left or right mouse button.
/// </summary>
/// <param name="e">Tool event data.</param>
/// <param name="context">Context that tool is being used in.</param>
protected virtual void OnPaint(ToolEvent e, IToolContext context)
{
var brush = e.IsLeftButtonPressed
? ToolUtility.SelectedBrush
: ToolUtility.SelectedBrushSecondary;
// Like with the regular paint tool, null brush is the eraser!
if (brush != null && !PlopUtility.CanPlopWithBrush(brush))
{
return;
}
if (brush == null)
{
if (ToolUtility.ActivePlop != null)
{
PlopUtility.ErasePlop(ToolUtility.ActivePlop);
ToolUtility.ActivePlop = null;
}
}
else
{
if (!this.allowOverpaint && ToolUtility.ActivePlop != null)
{
// Cycle to next variation if replacing plop with same brush.
int nextVariation = ToolUtility.ActivePlop.VariationIndex;
if (brush == ToolUtility.ActivePlop.Brush)
{
++nextVariation;
}
ToolUtility.ActivePlop = PlopUtility.CyclePlop(context.TileSystem, ToolUtility.ActivePlop, brush, ToolUtility.Rotation, nextVariation);
}
else
{
var args = this.GetPaintingArgs(brush);
if (args.variation == Brush.RANDOM_VARIATION)
{
args.variation = this.PreRandomizeVariation(brush, 0);
this.RandomizeVariationShift();
}
int nextVariation = args.ResolveVariation(0);
var plop = PlopUtility.PaintPlop(context.TileSystem, this.ApplySnapping(this.localMousePoint), brush, ToolUtility.Rotation, nextVariation);
ToolUtility.ActivePlop = plop;
ToolUtility.PreviouslyPlopped = plop;
}
}
}
/// <inheritdoc/>
public override void OnTool(ToolEvent e, IToolContext context)
{
switch (e.Type)
{
case EventType.MouseDown:
// Note: Left button for next; right button for previous.
int offset = 0;
if (e.IsLeftButtonPressed)
{
offset = -1;
}
else if (e.IsRightButtonPressed)
{
offset = +1;
}
if (ToolUtility.ActivePlop != null)
{
// Variation index to use next?
int nextVariation = ToolUtility.ActivePlop.VariationIndex + offset;
// Cycle through plop variations.
ToolUtility.ActivePlop = PlopUtility.CyclePlop(context.TileSystem, ToolUtility.ActivePlop, ToolUtility.ActivePlop.Brush, ToolUtility.ActivePlop.PaintedRotation, nextVariation);
}
else
{
// Get tile at pointer
var tile = context.TileSystem.GetTile(e.MousePointerTileIndex);
if (tile == null || tile.brush == null)
{
return;
}
// Variation index to use next?
int nextVariation = tile.variationIndex + offset;
// Cycle through tile variations.
tile.brush.CycleWithSimpleRotation(context.TileSystem, e.MousePointerTileIndex, tile.PaintedRotation, nextVariation);
}
break;
}
}