public void Rotate_90()
{
var testInput = new Vector2(12.345f, -67.89f);
var expected = new Vector2(67.89f, 12.345f);
var result = S2VXUtils.Rotate(testInput, 90);
Assert.AreEqual(expected.X, result.X, FloatingPointTolerance);
Assert.AreEqual(expected.Y, result.Y, FloatingPointTolerance);
}
private static Vector2 CalculateCameraOffset(Vector2 position, float rotation, float scale)
{
var closestCoordinate = new Vector2(
(float)Math.Round(position.X),
(float)Math.Round(position.Y)
);
var offset = S2VXUtils.Rotate(closestCoordinate - position, rotation) * scale;
return(offset);
}
protected override void Update()
{
if (IsHidden())
{
if (InternalChildren.Count != 0)
{
ClearInternal();
}
return;
}
var camera = Story.Camera;
var position = camera.Position;
var rotation = camera.Rotation;
var scale = camera.Scale.X;
var cameraOffset = CalculateCameraOffset(position, rotation, scale);
var unitX = S2VXUtils.Rotate(new Vector2(1, 0), rotation);
var unitY = S2VXUtils.Rotate(new Vector2(0, 1), rotation);
var startDistance = scale / 2;
var endDistance = LineLength / 2;
var distanceIncrement = scale;
var lineIndex = 0;
for (var distance = startDistance; distance <= endDistance; distance += distanceIncrement)
{
var up = unitY * distance + cameraOffset;
var down = -unitY * distance + cameraOffset;
var right = unitX * distance + cameraOffset;
var left = -unitX * distance + cameraOffset;
UpdateLineProperties(lineIndex++, up, LineLength, Thickness, rotation);
UpdateLineProperties(lineIndex++, down, LineLength, Thickness, rotation);
UpdateLineProperties(lineIndex++, right, Thickness, LineLength, rotation);
UpdateLineProperties(lineIndex++, left, Thickness, LineLength, rotation);
}
CheckAndRemoveLines(lineIndex);
}
private bool IsMouseOnNote(Vector2 mousePos, S2VXNote note)
{
mousePos = ToSpaceOfOtherDrawable(ToLocalSpace(mousePos), Editor);
// DrawPosition is centered at (0,0). I convert it so (0,0) starts top left
var convertedCenterPoint = new Vector2(note.DrawPosition.X + Editor.DrawWidth / 2, note.DrawPosition.Y + Editor.DrawHeight / 2);
var topLeft = new Vector2(convertedCenterPoint.X - note.DrawWidth / 2, convertedCenterPoint.Y - note.DrawHeight / 2);
var topRight = new Vector2(convertedCenterPoint.X + note.DrawWidth / 2, convertedCenterPoint.Y - note.DrawHeight / 2);
var bottomLeft = new Vector2(convertedCenterPoint.X - note.DrawWidth / 2, convertedCenterPoint.Y + note.DrawHeight / 2);
// https://gamedev.stackexchange.com/a/110233
var pointA = S2VXUtils.Rotate(new Vector2(topLeft.X - convertedCenterPoint.X, topLeft.Y - convertedCenterPoint.Y), note.Rotation);
var pointB = S2VXUtils.Rotate(new Vector2(topRight.X - convertedCenterPoint.X, topRight.Y - convertedCenterPoint.Y), note.Rotation);
var pointC = S2VXUtils.Rotate(new Vector2(bottomLeft.X - convertedCenterPoint.X, bottomLeft.Y - convertedCenterPoint.Y), note.Rotation);
// Shift origin back after rotating
pointA = new Vector2(pointA.X + convertedCenterPoint.X, pointA.Y + convertedCenterPoint.Y);
pointB = new Vector2(pointB.X + convertedCenterPoint.X, pointB.Y + convertedCenterPoint.Y);
pointC = new Vector2(pointC.X + convertedCenterPoint.X, pointC.Y + convertedCenterPoint.Y);
var v0 = pointC - pointA;
var v1 = pointB - pointA;
var v2 = mousePos - pointA;
var dot00 = Vector2.Dot(v0, v0);
var dot01 = Vector2.Dot(v0, v1);
var dot02 = Vector2.Dot(v0, v2);
var dot11 = Vector2.Dot(v1, v1);
var dot12 = Vector2.Dot(v1, v2);
var invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
var u = (dot11 * dot02 - dot01 * dot12) * invDenom;
var v = (dot00 * dot12 - dot01 * dot02) * invDenom;
return(u >= 0 && v >= 0 && u <= 1 && v <= 1);
}