diff --git a/osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs b/osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs index 0418aa1925..595357ee65 100644 --- a/osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs +++ b/osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs @@ -215,23 +215,23 @@ namespace osu.Game.Rulesets.Osu.Edit private bool scaleHitObjects(OsuHitObject[] hitObjects, Anchor reference, Vector2 scale) { + scale = getClampedScale(hitObjects, reference, scale); + // move the selection before scaling if dragging from top or left anchors. float xOffset = ((reference & Anchor.x0) > 0) ? -scale.X : 0; float yOffset = ((reference & Anchor.y0) > 0) ? -scale.Y : 0; Quad selectionQuad = getSurroundingQuad(hitObjects); - Quad scaledQuad = new Quad(selectionQuad.TopLeft.X + xOffset, selectionQuad.TopLeft.Y + yOffset, selectionQuad.Width + scale.X, selectionQuad.Height + scale.Y); - (bool xInBounds, bool yInBounds) = isQuadInBounds(scaledQuad); foreach (var h in hitObjects) { var newPosition = h.Position; // guard against no-ops and NaN. - if (scale.X != 0 && selectionQuad.Width > 0 && xInBounds) + if (scale.X != 0 && selectionQuad.Width > 0) newPosition.X = selectionQuad.TopLeft.X + xOffset + (h.X - selectionQuad.TopLeft.X) / selectionQuad.Width * (selectionQuad.Width + scale.X); - if (scale.Y != 0 && selectionQuad.Height > 0 && yInBounds) + if (scale.Y != 0 && selectionQuad.Height > 0) newPosition.Y = selectionQuad.TopLeft.Y + yOffset + (h.Y - selectionQuad.TopLeft.Y) / selectionQuad.Height * (selectionQuad.Height + scale.Y); h.Position = newPosition; @@ -269,6 +269,43 @@ namespace osu.Game.Rulesets.Osu.Edit h.Position += delta; } + /// + /// Clamp scale where selection does not exceed playfield bounds or flip. + /// + /// The hitobjects to be scaled + /// The anchor from which the scale operation is performed + /// The scale to be clamped + /// The clamped scale vector + private Vector2 getClampedScale(OsuHitObject[] hitObjects, Anchor reference, Vector2 scale) + { + float xOffset = ((reference & Anchor.x0) > 0) ? -scale.X : 0; + float yOffset = ((reference & Anchor.y0) > 0) ? -scale.Y : 0; + + Quad selectionQuad = getSurroundingQuad(hitObjects); + + //todo: this is not always correct for selections involving sliders + Quad scaledQuad = new Quad(selectionQuad.TopLeft.X + xOffset, selectionQuad.TopLeft.Y + yOffset, selectionQuad.Width + scale.X, selectionQuad.Height + scale.Y); + + //max Size -> playfield bounds + if (scaledQuad.TopLeft.X < 0) + scale.X += scaledQuad.TopLeft.X; + if (scaledQuad.TopLeft.Y < 0) + scale.Y += scaledQuad.TopLeft.Y; + + if (scaledQuad.BottomRight.X > DrawWidth) + scale.X -= scaledQuad.BottomRight.X - DrawWidth; + if (scaledQuad.BottomRight.Y > DrawHeight) + scale.Y -= scaledQuad.BottomRight.Y - DrawHeight; + + //min Size -> almost 0. Less than 0 causes the quad to flip, exactly 0 causes scaling to get stuck at minimum scale. + Vector2 scaledSize = selectionQuad.Size + scale; + Vector2 minSize = new Vector2(Precision.FLOAT_EPSILON); + + scale = Vector2.ComponentMax(minSize, scaledSize) - selectionQuad.Size; + + return scale; + } + /// /// Returns a gamefield-space quad surrounding the provided hit objects. ///