internal override void RecalculateBounds(Collider collider)
{
// if we dont have rotation or dont care about TRS we use localOffset as the center so we'll start with that
center = collider.LocalOffset;
if (collider.ShouldColliderScaleAndRotateWithTransform)
{
var hasUnitScale = true;
Matrix2D tempMat;
var combinedMatrix = Matrix2D.CreateTranslation(-_polygonCenter);
if (collider.Entity.Transform.Scale != Vector2.One)
{
Matrix2D.CreateScale(collider.Entity.Transform.Scale.X, collider.Entity.Transform.Scale.Y,
out tempMat);
Matrix2D.Multiply(ref combinedMatrix, ref tempMat, out combinedMatrix);
hasUnitScale = false;
// scale our offset and set it as center. If we have rotation also it will be reset below
var scaledOffset = collider.LocalOffset * collider.Entity.Transform.Scale;
center = scaledOffset;
}
if (collider.Entity.Transform.Rotation != 0)
{
Matrix2D.CreateRotation(collider.Entity.Transform.Rotation, out tempMat);
Matrix2D.Multiply(ref combinedMatrix, ref tempMat, out combinedMatrix);
// to deal with rotation with an offset origin we just move our center in a circle around 0,0 with our offset making the 0 angle
// we have to deal with scale here as well so we scale our offset to get the proper length first.
var offsetAngle = Mathf.Atan2(collider.LocalOffset.Y, collider.LocalOffset.X) * Mathf.Rad2Deg;
var offsetLength = hasUnitScale
? collider._localOffsetLength
: (collider.LocalOffset * collider.Entity.Transform.Scale).Length();
center = Mathf.PointOnCircle(Vector2.Zero, offsetLength,
collider.Entity.Transform.RotationDegrees + offsetAngle);
}
Matrix2D.CreateTranslation(ref _polygonCenter, out tempMat); // translate back center
Matrix2D.Multiply(ref combinedMatrix, ref tempMat, out combinedMatrix);
// finaly transform our original points
Vector2Ext.Transform(_originalPoints, ref combinedMatrix, Points);
IsUnrotated = collider.Entity.Transform.Rotation == 0;
// we only need to rebuild our edge normals if we rotated
if (collider._isRotationDirty)
{
_areEdgeNormalsDirty = true;
}
}
position = collider.Entity.Transform.Position + center;
bounds = RectangleF.RectEncompassingPoints(Points);
bounds.Location += position;
}
/// <summary>
/// Returns the transform for this group's coordinate system
/// </summary>
/// <returns>The transform.</returns>
protected Matrix2D ComputeTransform()
{
var mat = Matrix2D.Identity;
if (originX != 0 || originY != 0)
{
mat = Matrix2D.Multiply(mat, Matrix2D.CreateTranslation(-originX, -originY));
}
if (rotation != 0)
{
mat = Matrix2D.Multiply(mat, Matrix2D.CreateRotation(MathHelper.ToRadians(rotation)));
}
if (scaleX != 1 || scaleY != 1)
{
mat = Matrix2D.Multiply(mat, Matrix2D.CreateScale(scaleX, scaleY));
}
mat = Matrix2D.Multiply(mat, Matrix2D.CreateTranslation(x + originX, y + originY));
// Find the first parent that transforms
Group parentGroup = parent;
while (parentGroup != null)
{
if (parentGroup.transform)
{
break;
}
parentGroup = parentGroup.parent;
}
if (parentGroup != null)
{
mat = Matrix2D.Multiply(mat, parentGroup.ComputeTransform());
}
return(mat);
}
public void DrawInto(Batcher batcher, ref FontCharacterSource text, Vector2 position, Color color,
float rotation, Vector2 origin, Vector2 scale, SpriteEffects effect, float depth)
{
var flipAdjustment = Vector2.Zero;
var flippedVert = (effect & SpriteEffects.FlipVertically) == SpriteEffects.FlipVertically;
var flippedHorz = (effect & SpriteEffects.FlipHorizontally) == SpriteEffects.FlipHorizontally;
if (flippedVert || flippedHorz)
{
var size = MeasureString(ref text);
if (flippedHorz)
{
origin.X *= -1;
flipAdjustment.X = -size.X;
}
if (flippedVert)
{
origin.Y *= -1;
flipAdjustment.Y = LineHeight - size.Y;
}
}
var requiresTransformation = flippedHorz || flippedVert || rotation != 0f || scale != new Vector2(1);
if (requiresTransformation)
{
Matrix2D temp;
Matrix2D.CreateTranslation(-origin.X, -origin.Y, out _transformationMatrix);
Matrix2D.CreateScale((flippedHorz ? -scale.X : scale.X), (flippedVert ? -scale.Y : scale.Y), out temp);
Matrix2D.Multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
Matrix2D.CreateTranslation(flipAdjustment.X, flipAdjustment.Y, out temp);
Matrix2D.Multiply(ref temp, ref _transformationMatrix, out _transformationMatrix);
Matrix2D.CreateRotation(rotation, out temp);
Matrix2D.Multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
Matrix2D.CreateTranslation(position.X, position.Y, out temp);
Matrix2D.Multiply(ref _transformationMatrix, ref temp, out _transformationMatrix);
}
var previousCharacter = ' ';
Character currentChar = null;
var offset = requiresTransformation ? Vector2.Zero : position - origin;
for (var i = 0; i < text.Length; ++i)
{
var c = text[i];
if (c == '\r')
{
continue;
}
if (c == '\n')
{
offset.X = requiresTransformation ? 0f : position.X - origin.X;
offset.Y += LineHeight;
currentChar = null;
continue;
}
if (currentChar != null)
{
offset.X += Spacing.X + currentChar.XAdvance;
}
currentChar = ContainsCharacter(c) ? this[c] : DefaultCharacter;
var p = offset;
if (flippedHorz)
{
p.X += currentChar.Bounds.Width;
}
p.X += currentChar.Offset.X + GetKerning(previousCharacter, currentChar.Char);
if (flippedVert)
{
p.Y += currentChar.Bounds.Height - LineHeight;
}
p.Y += currentChar.Offset.Y;
// transform our point if we need to
if (requiresTransformation)
{
Vector2Ext.Transform(ref p, ref _transformationMatrix, out p);
}
var destRect = RectangleExt.FromFloats
(
p.X, p.Y,
currentChar.Bounds.Width * scale.X,
currentChar.Bounds.Height * scale.Y
);
batcher.Draw(Textures[currentChar.TexturePage], destRect, currentChar.Bounds, color, rotation, Vector2.Zero, effect, depth);
previousCharacter = c;
}
}