/// <summary>
/// Patches are defined in a local space. This determines the planet-space parameters of a patch
/// </summary>
private void SetPatchPlanetParameters( ITerrainPatch patch )
{
float radius = Planet.Model.Radius.ToRenderUnits;
Point3 edge = patch.LocalOrigin + ( patch.LocalUAxis / 2 );
Point3 centre = edge + ( patch.LocalVAxis / 2 );
Point3 plEdge = ( edge.ToVector3( ).MakeNormal( ) * radius ).ToPoint3( );
Point3 plCentre = ( centre.ToVector3( ).MakeNormal( ) * radius ).ToPoint3( );
patch.SetPlanetParameters( plCentre, plCentre.DistanceTo( plEdge ) );
}
/// <summary>
/// Generates vertices for a terrain patch
/// </summary>
/// <param name="patch">Terrain patch</param>
/// <param name="res">Terrain patch resolution</param>
/// <param name="firstVertex">Pointer to terrain vertices</param>
/// <param name="error">Terrain patch error output here</param>
public unsafe void GenerateTerrainPatchVertices( ITerrainPatch patch, int res, TerrainVertex* firstVertex, out float error )
{
m_Gen.GenerateVertices( patch.LocalOrigin, patch.LocalUStep, patch.LocalVStep, res, res, patch.Uv, patch.UvResolution, firstVertex, out error );
}
/// <summary>
/// Generates vertices for a patch. Calculates maximum error between this patch and next higher detail patch
/// </summary>
/// <param name="patch">Patch</param>
/// <param name="res">Patch resolution</param>
/// <param name="firstVertex">Patch vertices</param>
/// <param name="error">Maximum error value between this patch and higher level patch</param>
public unsafe void GenerateTerrainPatchVertices( ITerrainPatch patch, int res, TerrainPatchVertex* firstVertex, out float error )
{
SetPatchPlanetParameters( patch );
SafeTerrainGenerator.GenerateVertices( patch.LocalOrigin, patch.LocalUStep, patch.LocalVStep, res, res, patch.Uv, patch.UvResolution, firstVertex, out error );
}
