public void Draw(IEditorGame game)
{
game.GraphicsDevice.SetBlendState(game.GraphicsDevice.BlendStates.NonPremultiplied);
var viewProj = game.Camera.ViewMatrix * game.Camera.ProjectionMatrix;
// CullNone, if the camera is inside the selection.
var cullNone = Cuboid.Within((Point3)game.Camera.Position);
if (cullNone)
{
game.GraphicsDevice.SetRasterizerState(game.GraphicsDevice.RasterizerStates.CullNone);
}
foreach (var face in FacesUtils.AllFaces)
{
var quad = GetQuad(face);
var leftFace = face.GetLeftVisualFace();
var topFace = face.GetTopVisualFace();
var transform = new Vector4(
Cuboid.GetLengthComponent(leftFace),
Cuboid.GetLengthComponent(topFace),
Cuboid.GetPositionComponent(leftFace),
Cuboid.GetPositionComponent(topFace));
// TODO: texture scaling on the bottom face is fudged
// invert in certain edge cases
if (face.HasSideFaces())
{
transform.Y = -transform.Y;
if (face == Faces.Right)
{
transform.X = -transform.X;
}
else if (face == Faces.Forward)
{
transform.X = -transform.X;
}
}
switch (face)
{
case Faces.Left:
_effect.TransformMatrix = Matrix.Scaling(0, Cuboid.Height, Cuboid.Width) *
Matrix.Translation(Cuboid.Left - _zBias, Cuboid.Bottom, Cuboid.Forward) *
viewProj;
break;
case Faces.Bottom:
_effect.TransformMatrix = Matrix.Scaling(Cuboid.Length, 0, Cuboid.Width) *
Matrix.Translation(Cuboid.Left, Cuboid.Bottom - _zBias, Cuboid.Forward) *
viewProj;
break;
case Faces.Forward:
_effect.TransformMatrix = Matrix.Scaling(Cuboid.Length, Cuboid.Height, 0) *
Matrix.Translation(Cuboid.Left, Cuboid.Bottom, Cuboid.Forward - _zBias) *
viewProj;
break;
case Faces.Right:
_effect.TransformMatrix = Matrix.Scaling(0, Cuboid.Height, Cuboid.Width) *
Matrix.Translation(Cuboid.Left + Cuboid.Length + _zBias, Cuboid.Bottom, Cuboid.Forward) *
viewProj;
break;
case Faces.Top:
_effect.TransformMatrix = Matrix.Scaling(Cuboid.Length, 0, Cuboid.Width) *
Matrix.Translation(Cuboid.Left, Cuboid.Bottom + Cuboid.Height + _zBias, Cuboid.Forward) *
viewProj;
break;
case Faces.Backward:
_effect.TransformMatrix = Matrix.Scaling(Cuboid.Length, Cuboid.Height, 0) *
Matrix.Translation(Cuboid.Left, Cuboid.Bottom, Cuboid.Forward + Cuboid.Width + _zBias) *
viewProj;
break;
default:
Debug.Assert(false);
break;
}
_effect.MainTransform = transform * _textureScaling;
quad.Draw(game.GraphicsDevice);
}
// reset to default
if (cullNone)
{
game.GraphicsDevice.SetRasterizerState(game.GraphicsDevice.RasterizerStates.CullBack);
}
}
