private void RemoveItem(TransformComponent item)
{
if (item.Parent != this)
throw new InvalidOperationException("This TransformComponent's parent is not the expected value.");
item.parent = null;
}
internal void Update(TransformComponent transformComponent, ref Matrix worldMatrix)
{
if (!Enabled || modelViewHierarchy == null)
return;
// Check if scaling is negative
bool isScalingNegative = false;
{
Vector3 scale, translation;
Matrix rotation;
if (worldMatrix.Decompose(out scale, out rotation, out translation))
isScalingNegative = scale.X*scale.Y*scale.Z < 0.0f;
}
// Update model view hierarchy node matrices
modelViewHierarchy.NodeTransformations[0].LocalMatrix = worldMatrix;
modelViewHierarchy.NodeTransformations[0].IsScalingNegative = isScalingNegative;
modelViewHierarchy.UpdateMatrices();
// Update the bounding sphere / bounding box in world space
var meshes = Model.Meshes;
var modelBoundingSphere = BoundingSphere.Empty;
var modelBoundingBox = BoundingBox.Empty;
bool hasBoundingBox = false;
Matrix world;
foreach (var mesh in meshes)
{
var meshBoundingSphere = mesh.BoundingSphere;
modelViewHierarchy.GetWorldMatrix(mesh.NodeIndex, out world);
Vector3.TransformCoordinate(ref meshBoundingSphere.Center, ref world, out meshBoundingSphere.Center);
BoundingSphere.Merge(ref modelBoundingSphere, ref meshBoundingSphere, out modelBoundingSphere);
var boxExt = new BoundingBoxExt(mesh.BoundingBox);
boxExt.Transform(world);
var meshBox = (BoundingBox)boxExt;
if (hasBoundingBox)
{
BoundingBox.Merge(ref modelBoundingBox, ref meshBox, out modelBoundingBox);
}
else
{
modelBoundingBox = meshBox;
}
hasBoundingBox = true;
}
// Update the bounds
BoundingBox = modelBoundingBox;
BoundingSphere = modelBoundingSphere;
}
private void AddItem(TransformComponent item)
{
if (item.Parent != null)
throw new InvalidOperationException("This TransformComponent already has a Parent, detach it first.");
item.parent = this;
}
/// <inheritdoc/>
public override void Process(TransformComponent transformComponent)
{
// Waiting for roslyn ref locals to avoid having to pass world matrix
modelComponent.Update(transformComponent, ref transformComponent.WorldMatrix);
}
