/// <summary>
/// Sets box to extents of original box, transformed by the given matrix</summary>
/// <param name="M">Transformation matrix</param>
public void Transform(Matrix4F M)
{
// http://www.ics.uci.edu/~arvo/code/TransformingBoxes.c
// "Transforming Axis-Aligned Bounding Boxes",
// by Jim Arvo, in "Graphics Gems", Academic Press, 1990.
float[] oldMin = new[] { Min.X, Min.Y, Min.Z };
float[] oldMax = new[] { Max.X, Max.Y, Max.Z };
float[] newMin = new[] { M.M41, M.M42, M.M43 };
float[] newMax = new[] { newMin[0], newMin[1], newMin[2] };
float[] mArray = M.ToArray();
float a, b;
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < 3; ++j)
{
a = mArray[j * 4 + i] * oldMin[j];
b = mArray[j * 4 + i] * oldMax[j];
if (a < b)
{
newMin[i] += a;
newMax[i] += b;
}
else
{
newMin[i] += b;
newMax[i] += a;
}
}
}
Min.X = newMin[0];
Min.Y = newMin[1];
Min.Z = newMin[2];
Max.X = newMax[0];
Max.Y = newMax[1];
Max.Z = newMax[2];
m_initialized = true;
}
/// <summary>
/// Sets the DomNode attribute to the given Matrix4F</summary>
/// <param name="domNode">DomNode holding attribute</param>
/// <param name="attribute">Attribute of the DomNode that contains the data</param>
/// <param name="m">Matrix4F value to be set</param>
public static void SetMatrix(DomNode domNode, AttributeInfo attribute, Matrix4F m)
{
domNode.SetAttribute(attribute, m.ToArray());
}
public static void SetMatrix4x4(this DomNodeAdapter node, AttributeInfo attributeInfo, Matrix4F mat)
{
node.DomNode.SetAttribute(attributeInfo, mat.ToArray());
}
public virtual void UpdateTransform()
{
Matrix4F xform = TransformUtils.CalcTransform(this);
SetAttribute(Schema.gameObjectType.transformAttribute, xform.ToArray());
}
/// <summary>
/// Computes transformation matrix from transformation related atrributes.</summary>
public void ComputeTransform()
{
Matrix4F xform = TransformUtils.CalcTransform(m_transformable);
SetAttribute(Schema.gameObjectType.transformAttribute, xform.ToArray());
}
public static void SetMatrix4x4(this DomNodeAdapter node, AttributeInfo attributeInfo, Matrix4F mat)
{
node.DomNode.SetAttribute(attributeInfo, mat.ToArray());
}
/// <summary>
/// Sets the DomNode attribute to the given Matrix4F</summary>
/// <param name="domNode">DomNode holding attribute</param>
/// <param name="attribute">Attribute of the DomNode that contains the data</param>
/// <param name="m">Matrix4F value to be set</param>
public static void SetMatrix(DomNode domNode, AttributeInfo attribute, Matrix4F m)
{
domNode.SetAttribute(attribute, m.ToArray());
}
