private static void UpdateLocalMatrix(ref ModelNodeTransformation node)
{
var scaling = node.Transform.Scale;
TransformComponent.CreateMatrixTRS(ref node.Transform.Position, ref node.Transform.Rotation, ref scaling, 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;
}
}
}
/// <summary>
/// Get the transformation matrix to go from rootIndex to index.
/// </summary>
/// <param name="nodes">The nodes containing the local matrices.</param>
/// <param name="rootIndex">The root index.</param>
/// <param name="index">The current index.</param>
/// <returns>The matrix at this index.</returns>
private Matrix CombineMatricesFromNodeIndices(ModelNodeTransformation[] nodes, int rootIndex, int index)
{
if (index == -1 || index == rootIndex)
return Matrix.Identity;
var result = nodes[index].LocalMatrix;
if (index != rootIndex)
{
var topMatrix = CombineMatricesFromNodeIndices(nodes, rootIndex, nodes[index].ParentIndex);
result = Matrix.Multiply(result, topMatrix);
}
return result;
}
private static void UpdateLocalMatrix(ref ModelNodeTransformation node)
{
var scaling = node.Transform.Scale;
TransformComponent.CreateMatrixTRS(ref node.Transform.Position, ref node.Transform.Rotation, ref scaling, out node.LocalMatrix);
node.IsScalingNegative = scaling.X*scaling.Y*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)
{
// 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;
}
}
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);
}
