private static void UpdateLocalMatrix(ref ModelNodeTransformation node)
{
var scaling = node.Transform.Scale;
Matrix.Transformation(ref scaling, ref node.Transform.Rotation, ref node.Transform.Position, out node.LocalMatrix);
node.IsScalingNegative = (scaling.X < 0.0f) ^ (scaling.Y < 0.0f) ^ (scaling.Z < 0.0f);
}
private static void UpdateLocalMatrix(ref ModelNodeTransformation node)
{
var scaling = node.Transform.Scale;
Quaternion rotation;
//Bit of a hack to let us override the animation system with our own rotations
if ((node.Flags & ModelNodeFlags.CustomRotationOverride) == ModelNodeFlags.CustomRotationOverride)
{
rotation = node.CustomRotation;
}
else
{
rotation = node.Transform.Rotation * node.CustomRotation;
}
Matrix.Transformation(ref scaling, ref rotation, ref node.Transform.Position, out node.LocalMatrix);
node.IsScalingNegative = (scaling.X < 0.0f) ^ (scaling.Y < 0.0f) ^ (scaling.Z < 0.0f);
}
private void UpdateNode(ref ModelNodeTransformation node)
{
// Compute LocalMatrix
if ((node.Flags & ModelNodeFlags.EnableTransform) == ModelNodeFlags.EnableTransform)
{
UpdateLocalMatrix(ref node);
}
var nodeTransformationsLocal = this.nodeTransformations;
var parentIndex = node.ParentIndex;
// Update Enabled
bool renderingEnabledRecursive = (node.Flags & ModelNodeFlags.EnableRender) == ModelNodeFlags.EnableRender;
if (parentIndex != -1)
{
renderingEnabledRecursive &= nodeTransformationsLocal[parentIndex].RenderingEnabledRecursive;
}
node.RenderingEnabledRecursive = renderingEnabledRecursive;
if (renderingEnabledRecursive && (node.Flags & ModelNodeFlags.OverrideWorldMatrix) != ModelNodeFlags.OverrideWorldMatrix)
{
// Compute WorldMatrix
if (parentIndex != -1)
{
Matrix.Multiply(ref node.LocalMatrix, ref nodeTransformationsLocal[parentIndex].WorldMatrix, out node.WorldMatrix);
if (nodeTransformationsLocal[parentIndex].IsScalingNegative)
{
node.IsScalingNegative = !node.IsScalingNegative;
}
}
else
{
node.WorldMatrix = node.LocalMatrix;
}
}
}