public static PolyShapeInfo CloneAndTransformShape(PolyShapeInfo poly, Transform xform, Vector2 spriteSize, SpriteRenderer.FlipMode flip)
{
MathF.GetTransformDotVec(xform.Angle, xform.Scale, out var xDot, out var yDot);
var shape = new PolyShapeInfo();
var center = spriteSize / 2;
var verts = poly.Vertices.Select(v =>
{
v = v * PhysicsUnit.LengthToDuality - center;
if (flip.HasFlag(SpriteRenderer.FlipMode.Horizontal))
{
v.X *= -1;
}
if (flip.HasFlag(SpriteRenderer.FlipMode.Vertical))
{
v.Y *= -1;
}
//Vector2.Transform(ref v, ref matrix, out var v2);
MathF.TransformDotVec(ref v, ref xDot, ref yDot);
v += xform.Pos.Xy;
return(v);
});
if (flip.HasFlag(SpriteRenderer.FlipMode.Horizontal) ^ flip.HasFlag(SpriteRenderer.FlipMode.Vertical))
{
verts = verts.Reverse();
}
shape.Vertices = verts.ToArray();
return(shape);
}
public static CircleShapeInfo CloneAndTransformShape(CircleShapeInfo circle, Transform xform, Vector2 spriteSize, SpriteRenderer.FlipMode flip)
{
MathF.GetTransformDotVec(xform.Angle, xform.Scale, out var xDot, out var yDot);
Vector2 tmpPos = circle.Position * PhysicsUnit.LengthToDuality - spriteSize / 2;
if (flip.HasFlag(SpriteRenderer.FlipMode.Horizontal))
{
tmpPos.X *= -1;
}
if (flip.HasFlag(SpriteRenderer.FlipMode.Vertical))
{
tmpPos.Y *= -1;
}
MathF.TransformDotVec(ref tmpPos, ref xDot, ref yDot);
tmpPos += xform.Pos.Xy;
var shape = new CircleShapeInfo();
shape.Density = circle.Density;
shape.Friction = circle.Friction;
shape.IsSensor = circle.IsSensor;
shape.Position = tmpPos;
shape.Radius = circle.Radius * xform.Scale * PhysicsUnit.LengthToDuality;
return(shape);
}
