public void ComposeShape()
{
ColliderShapeChanged = false;
if (ColliderShape != null)
{
if (!ColliderShape.IsPartOfAsset)
{
ColliderShape.Dispose();
ColliderShape = null;
}
else
{
ColliderShape = null;
}
}
CanScaleShape = true;
if (ColliderShapes.Count == 1) //single shape case
{
if (ColliderShapes[0] == null)
{
return;
}
if (ColliderShapes[0].GetType() == typeof(ColliderShapeAssetDesc))
{
CanScaleShape = false;
}
ColliderShape = PhysicsColliderShape.CreateShape(ColliderShapes[0]);
ColliderShape?.UpdateLocalTransformations();
}
else if (ColliderShapes.Count > 1) //need a compound shape in this case
{
var compound = new CompoundColliderShape();
foreach (var desc in ColliderShapes)
{
if (desc == null)
{
continue;
}
if (desc.GetType() == typeof(ColliderShapeAssetDesc))
{
CanScaleShape = false;
}
var subShape = PhysicsColliderShape.CreateShape(desc);
if (subShape != null)
{
compound.AddChildShape(subShape);
}
}
ColliderShape = compound;
ColliderShape.UpdateLocalTransformations();
}
}
internal void DeriveBonePhysicsTransformation(out Matrix derivedTransformation)
{
Quaternion rotation;
Vector3 translation;
//derive rotation and translation, scale is ignored for now
Vector3 scale;
BoneWorldMatrix.Decompose(out scale, out rotation, out translation);
derivedTransformation = Matrix.RotationQuaternion(rotation) * Matrix.Translation(translation);
//handle dynamic scaling if allowed (aka not using assets)
if (CanScaleShape)
{
if (scale != ColliderShape.Scaling)
{
ColliderShape.Scaling = scale;
ColliderShape.UpdateLocalTransformations();
if (DebugEntity != null)
{
DebugEntity.Transform.Scale = scale;
}
}
}
//Handle collider shape offset
if (ColliderShape.LocalOffset != Vector3.Zero || ColliderShape.LocalRotation != Quaternion.Identity)
{
derivedTransformation = Matrix.Multiply(ColliderShape.PositiveCenterMatrix, derivedTransformation);
}
}