/// <summary>
/// Handle additional <see cref="CreateMessage"/> data.
/// </summary>
/// <param name="msg"></param>
/// <param name="packet"></param>
/// <param name="reader"></param>
/// <param name="cache"></param>
/// <param name="shapeIndex"></param>
/// <returns></returns>
protected override Error PostHandleMessage(CreateMessage msg, PacketBuffer packet, BinaryReader reader,
ShapeCache cache, int shapeIndex)
{
if (shapeIndex >= 0)
{
// Read the text in the buffer.
TextShapeData textData = new TextShapeData();
int textLength = reader.ReadUInt16();
textData.Mesh = null;
textData.Text = string.Empty;
if (textLength > 0)
{
byte[] textBytes = reader.ReadBytes(textLength);
textData.Text = System.Text.Encoding.UTF8.GetString(textBytes);
}
textData.FontSize = (int)msg.Attributes.ScaleZ;
if ((msg.Flags & (ushort)Text3DFlag.ScreenFacing) != 0)
{
// Need to use -forward for text.
// ScreenFacing.AddToManager(obj, -Vector3.forward, Vector3.up);
textData.ScreenFacing = true;
}
cache.SetShapeDataByIndex(shapeIndex, textData);
}
return(base.PostHandleMessage(msg, packet, reader, cache, shapeIndex));
}
/// <summary>
/// Creates a text shape for serialisation.
/// </summary>
/// <param name="shapeComponent">The component to create a shape for.</param>
/// <returns>A shape instance suitable for configuring to generate serialisation messages.</returns>
protected override Shapes.Shape CreateSerialisationShape(ShapeCache cache, int shapeIndex, CreateMessage shape)
{
TextShapeData textData = cache.GetShapeDataByIndex <TextShapeData>(shapeIndex);
// Note: initialise position to zero. SetAttributes() below will overwrite this.
var textShape = new Shapes.Text3D(textData.Text, shape.ObjectID, shape.Category, Maths.Vector3.Zero);
textShape.SetAttributes(shape.Attributes);
return(textShape);
}
/// <summary>
/// Handle additional <see cref="UpdateMessage"/> data.
/// </summary>
/// <param name="obj"></param>
/// <param name="msg"></param>
/// <param name="packet"></param>
/// <param name="reader"></param>
/// <returns></returns>
protected override Error PostHandleMessage(UpdateMessage msg, PacketBuffer packet, BinaryReader reader,
ShapeCache cache, int shapeIndex)
{
TextShapeData textData = cache.GetShapeDataByIndex <TextShapeData>(shapeIndex);
// textData.Mesh.fontSize = (int)msg.Attributes.ScaleZ;
// textData.Mesh.color = Maths.ColourExt.ToUnity32(new Maths.Colour(msg.Attributes.Colour));
textData.ScreenFacing = (msg.Flags & (ushort)Text3DFlag.ScreenFacing) != 0;
cache.SetShapeDataByIndex(shapeIndex, textData);
return(base.PostHandleMessage(msg, packet, reader, cache, shapeIndex));
}
protected void Render(CameraContext cameraContext, ShapeCache shapeCache)
{
// TODO: (KS) verify material setup.
// TODO: (KS) incorporate the 3es scene transform.
// TODO: (KS) handle multiple cameras (code only tailored to one).
Vector3 cameraPosition = (Vector3)cameraContext.CameraToWorldTransform.GetColumn(3);
CategoriesState categories = this.CategoriesState;
// Walk the items in the shape cache.
foreach (int shapeIndex in shapeCache.ShapeIndices)
{
// if (shapeCache.GetShapeDataByIndex<CreateMessage>(shapeIndex).Category)
CreateMessage shape = shapeCache.GetShapeByIndex(shapeIndex);
if (!categories.IsActive(shape.Category))
{
// Category not enabled.
continue;
}
// Get transform and text data.
Matrix4x4 transform = shapeCache.GetShapeTransformByIndex(shapeIndex);
TextShapeData textData = shapeCache.GetShapeDataByIndex <TextShapeData>(shapeIndex);
if (textData.Mesh == null || textData.Material == null)
{
// No mesh/material. Try instantiate via the delegate.
if (CreateTextMeshHandler != null)
{
CreateTextMeshHandler(textData.Text, textData.FontSize,
Maths.ColourExt.ToUnity(new Maths.Colour(shape.Attributes.Colour)),
ref textData.Mesh, ref textData.Material);
}
if (textData.Mesh == null || textData.Material == null)
{
continue;
}
// Newly creates mesh/material. Store the changes.
shapeCache.SetShapeDataByIndex <TextShapeData>(shapeIndex, textData);
}
if (textData.Mesh == null || textData.Material == null)
{
continue;
}
if (textData.ScreenFacing)
{
Vector3 textPosition = cameraContext.TesSceneToWorldTransform * (Vector3)transform.GetColumn(3);
Vector3 toCamera = cameraPosition - textPosition;
// Remove any height component from the camera. Indexing using Unity's left handed, Y up system.
toCamera[1] = 0;
if (toCamera.sqrMagnitude > 1e-3f)
{
toCamera = toCamera.normalized;
Vector3 side = Vector3.Cross(toCamera, Vector3.up);
// Build new rotation axes using toCamera for forward and a new Up axis.
transform.SetColumn(0, new Vector4(side.x, side.y, side.z));
transform.SetColumn(1, new Vector4(Vector3.up.x, Vector3.up.y, Vector3.up.z));
transform.SetColumn(2, new Vector4(toCamera.x, toCamera.y, toCamera.z));
transform.SetColumn(3, new Vector4(textPosition.x, textPosition.y, textPosition.z, 1.0f));
}
// else too close to the camera to build a rotation.
}
else
{
// transform = cameraContext.TesSceneToWorldTransform * transform;
// Just extract the text position.
// TODO: (KS) will have to look at allowing users to orient the text from the server.
Vector3 textPosition = cameraContext.TesSceneToWorldTransform * (Vector3)transform.GetColumn(3);
transform = Matrix4x4.identity;
transform.SetColumn(3, new Vector4(textPosition.x, textPosition.y, textPosition.z, 1.0f));
}
cameraContext.TransparentBuffer.DrawMesh(textData.Mesh, transform, textData.Material);
// TODO: (KS) resolve procedural rendering without a game object. Consider TextMeshPro.
// TODO: (KS) select opaque layer.
// Graphics.DrawMesh(textData.Mesh, transform, material, 0);
}
}
