/// <summary>
/// Get World Matrix For NifGeometry
/// </summary>
/// <param name="nifGeom"></param>
/// <param name="UnitFactor"></param>
/// <param name="heightCalculator"></param>
/// <returns></returns>
protected static Matrix ComputeWorldMatrix(NifGeometry nifGeom, float UnitFactor, TerrainHeightCalculator heightCalculator)
{
if (nifGeom == null)
{
throw new ArgumentNullException("nifGeom");
}
// Find Ground
float nifHeight = nifGeom.Z * UnitFactor;
if (nifGeom.OnGround)
{
nifHeight = heightCalculator[nifGeom.X, nifGeom.Y] * UnitFactor;
}
// Get Translation (XY Inverted), Scale, Rotation
Matrix translation;
ZoneDrawingExtensions.CreateTranslation(nifGeom.X * UnitFactor, nifHeight, nifGeom.Y * UnitFactor, out translation);
Matrix scale;
ZoneDrawingExtensions.CreateScale(nifGeom.Scale * UnitFactor, out scale);
Matrix rotation;
ZoneDrawingExtensions.CreateRotation(new Vector3(nifGeom.RotationX, nifGeom.RotationY, nifGeom.RotationZ), nifGeom.Angle, out rotation);
Matrix result = Matrix.Identity;
// Flip if needed
if (nifGeom.Flip)
{
Matrix flip;
ZoneDrawingExtensions.CreateScale(-1f, 1f, 1f, out flip);
result = flip;
}
Matrix intermediateResult;
// Combine Scale, Rotation, Invertion Rotation, Translation
ZoneDrawingExtensions.Mult(ref result, ref scale, out intermediateResult);
result = intermediateResult;
ZoneDrawingExtensions.Mult(ref result, ref rotation, out intermediateResult);
result = intermediateResult;
ZoneDrawingExtensions.Mult(ref result, ref RotationMatrix, out intermediateResult);
result = intermediateResult;
ZoneDrawingExtensions.Mult(ref result, ref translation, out intermediateResult);
result = intermediateResult;
// Combine Matrix with Parent Matrix
if (nifGeom.RelativeTo != null)
{
Matrix relativeMatrix = ComputeWorldMatrix(nifGeom.RelativeTo, UnitFactor, heightCalculator);
ZoneDrawingExtensions.Mult(ref result, ref relativeMatrix, out intermediateResult);
result = intermediateResult;
}
return(result);
}
/// <summary>
/// Get World Matrix For NifGeometry
/// </summary>
/// <param name="nifGeom"></param>
/// <param name="UnitFactor"></param>
/// <returns></returns>
protected static Matrix ComputeWorldMatrix(NifGeometry nifGeom, float UnitFactor)
{
if (nifGeom == null)
throw new ArgumentNullException("nifGeom");
// Get Translation (XY Inverted), Scale, Rotation
Matrix translation;
ZoneDrawingExtensions.CreateTranslation(nifGeom.X * UnitFactor, nifGeom.Y * UnitFactor, nifGeom.Z * UnitFactor, out translation);
Matrix scale;
ZoneDrawingExtensions.CreateScale(nifGeom.Scale * UnitFactor, out scale);
Matrix rotation;
ZoneDrawingExtensions.CreateRotation(new Vector3(nifGeom.RotationX, nifGeom.RotationY, nifGeom.RotationZ * -1f), nifGeom.Angle , out rotation);
Matrix result = Matrix.Identity;
// Flip if needed
if (nifGeom.Flip)
{
Matrix flip;
ZoneDrawingExtensions.CreateScale(-1f, 1f, 1f, out flip);
result = flip;
}
Matrix intermediateResult;
// Combine Scale, Rotation, Translation, Invertion Rotation
ZoneDrawingExtensions.Mult(ref result, ref scale, out intermediateResult);
result = intermediateResult;
ZoneDrawingExtensions.Mult(ref result, ref rotation, out intermediateResult);
result = intermediateResult;
ZoneDrawingExtensions.Mult(ref result, ref translation, out intermediateResult);
result = intermediateResult;
ZoneDrawingExtensions.Mult(ref result, ref RotationMatrix, out intermediateResult);
result = intermediateResult;
// Combine Matrix with Parent Matrix
if (nifGeom.RelativeTo != null)
{
Matrix relativeMatrix = ComputeWorldMatrix(nifGeom.RelativeTo, UnitFactor);
ZoneDrawingExtensions.Mult(ref result, ref relativeMatrix, out intermediateResult);
result = intermediateResult;
}
return result;
}
