private static void ApplySet(Value value, RenderableData renderData, ref Matrix4x4 matrix)
{
int count = value.Count;
for (int i = 0; i < count; i++)
{
// Get the child value:
Value childValue = value[i];
// Get it as a transformation:
Css.Functions.Transformation transformation = childValue as Css.Functions.Transformation;
if (transformation != null)
{
// Apply to matrix:
matrix *= transformation.CalculateMatrix(renderData);
}
else if (childValue.Type == ValueType.Set)
{
// This occurs if they used an awkward combo of ' ' and ,.
// No problems though - it's supported :)
ApplySet(childValue, renderData, ref matrix);
}
}
}
/// <summary>Sets the defaults for one or more transform functions.</summary>
private void SetDefaults(Css.Value set)
{
// Get as a function:
Css.Functions.Transformation tf = set as Css.Functions.Transformation;
if (tf != null)
{
tf.SetDefaults();
return;
}
// Should be a set:
if (set is Css.ValueSet)
{
for (int i = 0; i < set.Count; i++)
{
// Get as a function:
tf = set[i] as Css.Functions.Transformation;
if (tf != null)
{
tf.SetDefaults();
}
}
}
}
/// <summary>Computes a Matrix4x4 from a valid transform value.</summary>
public static Matrix4x4 Compute(Css.Value value, RenderableData renderData)
{
Matrix4x4 matrix = Matrix4x4.identity;
if (value == null)
{
return(matrix);
}
// For each function in value, combine into matrix.
// We either have a set of [TransformFunction]'s or a transform function
Css.Functions.Transformation transformation = value as Css.Functions.Transformation;
if (transformation != null)
{
// Single value.
matrix = transformation.CalculateMatrix(renderData);
}
else if (value.Type == ValueType.Set)
{
// Set of transformation functions:
ApplySet(value, renderData, ref matrix);
}
return(matrix);
}
