protected virtual void begin_stroke(Frame3f vStartFrameL, int nHitTID)
{
activeBrushOp = (UseSecondary && secondaryBrushOp != null) ? secondaryBrushOp : primaryBrushOp;
activeBrushOp.Mesh = Target.Mesh;
activeBrushOp.Radius = this.Radius.SceneValue;
activeBrushOp.Invert = this.Invert;
activeBrushOp.BeginStroke(vStartFrameL, nHitTID);
}
protected virtual void update_preview(Frame3f vLocalF, int nHitTID)
{
activeBrushOp = (UseSecondary && secondaryBrushOp != null) ? secondaryBrushOp : primaryBrushOp;
activeBrushOp.UpdatePreview(vLocalF, nHitTID);
}