/// <summary>
/// Applies script state and computes transformations.
/// </summary>
/// <param name="viewMatrix"></param>
/// <param name="parentNode"></param>
/// <param name="deltaTime"></param>
/// <param name="matrixRotate"></param>
public void PrepareForRender(Matrix4x4 viewMatrix, RenderTreeNode parentNode, int deltaTime,
bool matrixRotate = false)
{
var frontendObjectData = FrontendObject.Data;
var size = frontendObjectData.Size;
var position = frontendObjectData.Position;
var rotation = frontendObjectData.Rotation;
var color = frontendObjectData.Color;
if (frontendObjectData is ImageData imageData)
{
UpperLeft = imageData.UpperLeft;
LowerRight = imageData.LowerRight;
}
if (CurrentScript != null &&
(CurrentScript.Length > 0 || CurrentScript.ChainedId != 0xFFFFFFFF) &&
CurrentScriptTime >= 0)
{
if (CurrentScriptTime >= CurrentScript.Length)
{
if ((CurrentScript.Flags & 1) == 1)
{
Debug.WriteLine("looping script {0:X} for object {1:X}", CurrentScript.Id, FrontendObject.NameHash);
CurrentScriptTime = 0;
}
else if (CurrentScript.ChainedId != 0xFFFFFFFF)
{
var nextScript = FrontendObject.Scripts.Find(s => s.Id == CurrentScript.ChainedId) ??
throw new Exception(
$"Cannot find chained script (object {FrontendObject.NameHash:X}, base script {CurrentScript.Id:X}): {CurrentScript.ChainedId:X}");
Debug.WriteLine("activating chained script for object {1:X}: {0}",
nextScript.Name ?? nextScript.Id.ToString("X"), FrontendObject.NameHash);
SetScript(nextScript);
}
}
foreach (var track in CurrentScript.Tracks)
{
switch (track.Offset)
{
case 0: // Color
color = TrackInterpolation.Interpolate <Color4>(track, CurrentScriptTime);
break;
case 7: // Position
position = TrackInterpolation.Interpolate <Vector3>(track, CurrentScriptTime);
break;
case 10: // Rotation
rotation = TrackInterpolation.Interpolate <Quaternion>(track, CurrentScriptTime);
break;
case 14: // Size
size = TrackInterpolation.Interpolate <Vector3>(track, CurrentScriptTime);
break;
case 17: // UpperLeft
{
if (FrontendObject is IImage <ImageData> )
{
UpperLeft = TrackInterpolation.Interpolate <Vector2>(track, CurrentScriptTime);
}
else
{
throw new Exception("Encountered UpperLeft track for a non-image");
}
break;
}
case 19: // LowerRight
{
if (FrontendObject is IImage <ImageData> )
{
LowerRight = TrackInterpolation.Interpolate <Vector2>(track, CurrentScriptTime);
}
else
{
throw new Exception("Encountered LowerRight track for a non-image");
}
break;
}
default:
throw new IndexOutOfRangeException(
$"object {FrontendObject.NameHash:X} script {CurrentScript.Id:X} has unsupported track with offset {track.Offset}");
}
}
CurrentScriptTime += deltaTime;
}
var scaleMatrix = Matrix4x4.CreateScale(size.X, size.Y, size.Z);
var rotateMatrix = Matrix4x4.CreateFromQuaternion(rotation);
var transMatrix = Matrix4x4.CreateTranslation(position.X, position.Y, position.Z);
if (matrixRotate)
{
ObjectMatrix = scaleMatrix * rotateMatrix * transMatrix * viewMatrix;
}
else
{
ObjectMatrix = scaleMatrix * transMatrix * viewMatrix;
}
ObjectRotation = rotation;
ObjectColor = color;
if (parentNode != null)
{
ObjectRotation *= parentNode.ObjectRotation;
ObjectColor = Color4.Blend(ObjectColor, parentNode.ObjectColor);
}
}