private Coordinate GetResizeDistance(Viewport2D viewport, ViewportEvent e, BaseBoxTool.BoxState state, Document document)
{
var origin = GetResizeOrigin(viewport, state, document);
if (origin == null)
{
return(null);
}
var before = state.MoveStart;
var after = viewport.ScreenToWorld(e.X, viewport.Height - e.Y);
return(SnapIfNeeded(origin + after - before, document) - origin);
}
private Coordinate GetResizeOrigin(Viewport2D viewport, BaseBoxTool.BoxState state, Document document)
{
if (state.Action != BaseBoxTool.BoxAction.Resizing || state.Handle != BaseBoxTool.ResizeHandle.Center)
{
return(null);
}
var sel = document.Selection.GetSelectedParents().ToList();
if (sel.Count == 1 && sel[0] is Entity && !sel[0].HasChildren)
{
return(viewport.Flatten(((Entity)sel[0]).Origin));
}
var st = viewport.Flatten(state.PreTransformBoxStart);
var ed = viewport.Flatten(state.PreTransformBoxEnd);
var points = new[] { st, ed, new Coordinate(st.X, ed.Y, 0), new Coordinate(ed.X, st.Y, 0) };
return(points.OrderBy(x => (state.MoveStart - x).LengthSquared()).First());
}
private static Coordinate GetOriginForTransform(Viewport2D viewport, BaseBoxTool.BoxState state)
{
decimal x = 0;
decimal y = 0;
var cstart = viewport.Flatten(state.PreTransformBoxStart);
var cend = viewport.Flatten(state.PreTransformBoxEnd);
switch (state.Handle)
{
case BaseBoxTool.ResizeHandle.TopLeft:
case BaseBoxTool.ResizeHandle.Top:
case BaseBoxTool.ResizeHandle.TopRight:
case BaseBoxTool.ResizeHandle.Left:
case BaseBoxTool.ResizeHandle.Right:
y = cstart.Y;
break;
case BaseBoxTool.ResizeHandle.BottomLeft:
case BaseBoxTool.ResizeHandle.Bottom:
case BaseBoxTool.ResizeHandle.BottomRight:
y = cend.Y;
break;
}
switch (state.Handle)
{
case BaseBoxTool.ResizeHandle.Top:
case BaseBoxTool.ResizeHandle.TopRight:
case BaseBoxTool.ResizeHandle.Right:
case BaseBoxTool.ResizeHandle.BottomRight:
case BaseBoxTool.ResizeHandle.Bottom:
x = cstart.X;
break;
case BaseBoxTool.ResizeHandle.TopLeft:
case BaseBoxTool.ResizeHandle.Left:
case BaseBoxTool.ResizeHandle.BottomLeft:
x = cend.X;
break;
}
return(viewport.Expand(new Coordinate(x, y, 0)));
}
public override Matrix4?GetTransformationMatrix(Viewport2D viewport, ViewportEvent e, BaseBoxTool.BoxState state, Document doc, IEnumerable <Widget> activeWidgets)
{
var origin = viewport.ZeroUnusedCoordinate((state.PreTransformBoxStart + state.PreTransformBoxEnd) / 2);
var rw = activeWidgets.OfType <RotationWidget>().FirstOrDefault();
if (rw != null)
{
origin = rw.GetPivotPoint();
}
var forigin = viewport.Flatten(origin);
var origv = (state.MoveStart - forigin).Normalise();
var newv = (viewport.ScreenToWorld(e.X, viewport.Height - e.Y) - forigin).Normalise();
var angle = DMath.Acos(Math.Max(-1, Math.Min(1, origv.Dot(newv))));
if ((origv.Cross(newv).Z < 0))
{
angle = 2 * DMath.PI - angle;
}
var shf = KeyboardState.Shift;
var def = Select.RotationStyle;
var snap = (def == RotationStyle.SnapOnShift && shf) || (def == RotationStyle.SnapOffShift && !shf);
if (snap)
{
var deg = angle * (180 / DMath.PI);
var rnd = Math.Round(deg / 15) * 15;
angle = rnd * (DMath.PI / 180);
}
Matrix4 rotm;
if (viewport.Direction == Viewport2D.ViewDirection.Top)
{
rotm = Matrix4.CreateRotationZ((float)angle);
}
else if (viewport.Direction == Viewport2D.ViewDirection.Front)
{
rotm = Matrix4.CreateRotationX((float)angle);
}
else
{
rotm = Matrix4.CreateRotationY((float)-angle); // The Y axis rotation goes in the reverse direction for whatever reason
}
var mov = Matrix4.CreateTranslation((float)-origin.X, (float)-origin.Y, (float)-origin.Z);
var rot = Matrix4.Mult(mov, rotm);
return(Matrix4.Mult(rot, Matrix4.Invert(mov)));
}
public override Matrix4?GetTransformationMatrix(Viewport2D viewport, ViewportEvent e, BaseBoxTool.BoxState state, Document doc, IEnumerable <Widget> activeWidgets)
{
var shearUpDown = state.Handle == BaseBoxTool.ResizeHandle.Left || state.Handle == BaseBoxTool.ResizeHandle.Right;
var shearTopRight = state.Handle == BaseBoxTool.ResizeHandle.Top || state.Handle == BaseBoxTool.ResizeHandle.Right;
var nsmd = viewport.ScreenToWorld(e.X, viewport.Height - e.Y) - state.MoveStart;
var mouseDiff = SnapIfNeeded(nsmd, doc);
if (KeyboardState.Shift)
{
mouseDiff = doc.Snap(nsmd, doc.Map.GridSpacing / 2);
}
var relative = viewport.Flatten(state.PreTransformBoxEnd - state.PreTransformBoxStart);
var shearOrigin = (shearTopRight) ? state.PreTransformBoxStart : state.PreTransformBoxEnd;
var shearAmount = new Coordinate(mouseDiff.X / relative.Y, mouseDiff.Y / relative.X, 0);
if (!shearTopRight)
{
shearAmount *= -1;
}
var shearMatrix = Matrix4.Identity;
var sax = (float)shearAmount.X;
var say = (float)shearAmount.Y;
switch (viewport.Direction)
{
case Viewport2D.ViewDirection.Top:
if (shearUpDown)
{
shearMatrix.M12 = say;
}
else
{
shearMatrix.M21 = sax;
}
break;
case Viewport2D.ViewDirection.Front:
if (shearUpDown)
{
shearMatrix.M23 = say;
}
else
{
shearMatrix.M32 = sax;
}
break;
case Viewport2D.ViewDirection.Side:
if (shearUpDown)
{
shearMatrix.M13 = say;
}
else
{
shearMatrix.M31 = sax;
}
break;
}
var stran = Matrix4.CreateTranslation((float)-shearOrigin.X, (float)-shearOrigin.Y, (float)-shearOrigin.Z);
var shear = Matrix4.Mult(stran, shearMatrix);
return(Matrix4.Mult(shear, Matrix4.Invert(stran)));
}
public abstract Matrix4?GetTransformationMatrix(Viewport2D viewport, ViewportEvent mouseEventArgs, BaseBoxTool.BoxState state, Document doc, IEnumerable <Widget> activeWidgets);
private Tuple <Coordinate, Coordinate> GetBoxCoordinatesForSelectionResize(Viewport2D viewport, ViewportEvent e, BaseBoxTool.BoxState state, Document document)
{
if (state.Action != BaseBoxTool.BoxAction.Resizing)
{
return(Tuple.Create(state.BoxStart, state.BoxEnd));
}
var now = SnapIfNeeded(viewport.ScreenToWorld(e.X, viewport.Height - e.Y), document);
var cstart = viewport.Flatten(state.BoxStart);
var cend = viewport.Flatten(state.BoxEnd);
// Proportional scaling
var ostart = viewport.Flatten(state.PreTransformBoxStart ?? Coordinate.Zero);
var oend = viewport.Flatten(state.PreTransformBoxEnd ?? Coordinate.Zero);
var owidth = oend.X - ostart.X;
var oheight = oend.Y - ostart.Y;
var proportional = KeyboardState.Ctrl && state.Action == BaseBoxTool.BoxAction.Resizing && owidth != 0 && oheight != 0;
switch (state.Handle)
{
case BaseBoxTool.ResizeHandle.TopLeft:
cstart.X = Math.Min(now.X, cend.X - 1);
cend.Y = Math.Max(now.Y, cstart.Y + 1);
break;
case BaseBoxTool.ResizeHandle.Top:
cend.Y = Math.Max(now.Y, cstart.Y + 1);
break;
case BaseBoxTool.ResizeHandle.TopRight:
cend.X = Math.Max(now.X, cstart.X + 1);
cend.Y = Math.Max(now.Y, cstart.Y + 1);
break;
case BaseBoxTool.ResizeHandle.Left:
cstart.X = Math.Min(now.X, cend.X - 1);
break;
case BaseBoxTool.ResizeHandle.Center:
var cdiff = cend - cstart;
cstart = viewport.Flatten(state.PreTransformBoxStart) + now - SnapIfNeeded(state.MoveStart, document);
cend = cstart + cdiff;
break;
case BaseBoxTool.ResizeHandle.Right:
cend.X = Math.Max(now.X, cstart.X + 1);
break;
case BaseBoxTool.ResizeHandle.BottomLeft:
cstart.X = Math.Min(now.X, cend.X - 1);
cstart.Y = Math.Min(now.Y, cend.Y - 1);
break;
case BaseBoxTool.ResizeHandle.Bottom:
cstart.Y = Math.Min(now.Y, cend.Y - 1);
break;
case BaseBoxTool.ResizeHandle.BottomRight:
cend.X = Math.Max(now.X, cstart.X + 1);
cstart.Y = Math.Min(now.Y, cend.Y - 1);
break;
default:
throw new ArgumentOutOfRangeException();
}
if (proportional)
{
var nwidth = cend.X - cstart.X;
var nheight = cend.Y - cstart.Y;
var mult = Math.Max(nwidth / owidth, nheight / oheight);
var pwidth = owidth * mult;
var pheight = oheight * mult;
var wdiff = pwidth - nwidth;
var hdiff = pheight - nheight;
switch (state.Handle)
{
case BaseBoxTool.ResizeHandle.TopLeft:
cstart.X -= wdiff;
cend.Y += hdiff;
break;
case BaseBoxTool.ResizeHandle.TopRight:
cend.X += wdiff;
cend.Y += hdiff;
break;
case BaseBoxTool.ResizeHandle.BottomLeft:
cstart.X -= wdiff;
cstart.Y -= hdiff;
break;
case BaseBoxTool.ResizeHandle.BottomRight:
cend.X += wdiff;
cstart.Y -= hdiff;
break;
}
}
return(SnapBoxCoordinatesIfNeeded(viewport, state, document, cstart, cend));
}
public override Matrix4?GetTransformationMatrix(Viewport2D viewport, ViewportEvent e, BaseBoxTool.BoxState state, Document doc, IEnumerable <Widget> activeWidgets)
{
var coords = GetBoxCoordinatesForSelectionResize(viewport, e, state, doc);
state.BoxStart = coords.Item1;
state.BoxEnd = coords.Item2;
Matrix4 resizeMatrix;
if (state.Handle == BaseBoxTool.ResizeHandle.Center)
{
var movement = state.BoxStart - state.PreTransformBoxStart;
resizeMatrix = Matrix4.CreateTranslation((float)movement.X, (float)movement.Y, (float)movement.Z);
}
else
{
var resize = (state.PreTransformBoxStart - state.BoxStart) +
(state.BoxEnd - state.PreTransformBoxEnd);
resize = resize.ComponentDivide(state.PreTransformBoxEnd - state.PreTransformBoxStart);
resize += new Coordinate(1, 1, 1);
var offset = -GetOriginForTransform(viewport, state);
var trans = Matrix4.CreateTranslation((float)offset.X, (float)offset.Y, (float)offset.Z);
var scale = Matrix4.Mult(trans, Matrix4.Scale((float)resize.X, (float)resize.Y, (float)resize.Z));
resizeMatrix = Matrix4.Mult(scale, Matrix4.Invert(trans));
}
return(resizeMatrix);
}
private Tuple <Coordinate, Coordinate> SnapBoxCoordinatesIfNeeded(Viewport2D viewport, BaseBoxTool.BoxState state, Document document, Coordinate start, Coordinate end)
{
if (state.Action == BaseBoxTool.BoxAction.Resizing && state.Handle == BaseBoxTool.ResizeHandle.Center)
{
// Pick the corner to snap
var ms = state.MoveStart;
var pts = viewport.Flatten(state.PreTransformBoxStart);
var pte = viewport.Flatten(state.PreTransformBoxEnd);
var ss = SnapIfNeeded(start, document);
var se = SnapIfNeeded(end, document);
var middle = (pts + pte) / 2;
var delta = ss - start;
if (ms.Y > middle.Y)
{
// Top
delta.Y = se.Y - end.Y;
}
if (ms.X > middle.X)
{
// Right
delta.X = se.X - end.X;
}
start += delta;
end += delta;
}
var cstart = viewport.Expand(start) + viewport.GetUnusedCoordinate(state.BoxStart);
var cend = viewport.Expand(end) + viewport.GetUnusedCoordinate(state.BoxEnd);
return(Tuple.Create(cstart, cend));
}
