public PatchGrid( Terrain terrain, int gridWidth, int gridHeight )
{
int highestRes = Patch.GetLevelResolution( Patch.HighestDetailLod );
highestRes *= highestRes;
VertexBufferFormat format = new VertexBufferFormat( );
format.Add( VertexFieldSemantic.Position, VertexFieldElementTypeId.Float32, 3 );
m_Vb = RbGraphics.Factory.CreateVertexBuffer( );
m_Vb.Create( format, gridWidth * gridHeight * highestRes );
m_Patches = new Patch[ gridWidth, gridHeight ];
float z = -PatchDepth * ( gridHeight / 2 );
float xInc = PatchWidth;
float zInc = PatchDepth;
float maxWidth = gridWidth * PatchWidth;
float maxHeight = gridWidth * PatchDepth;
terrain.SetTerrainArea( maxWidth, maxHeight );
int vbOffset = 0;
for ( int row = 0; row < gridHeight; ++row, z += zInc )
{
float x = -PatchWidth * ( gridWidth / 2 );
for ( int col = 0; col < gridWidth; ++col, x += xInc )
{
Color c = ( ( col + row ) % 2 ) == 0 ? Color.Black : Color.White;
m_Patches[ col, row ] = new Patch( terrain, vbOffset, x, z, PatchWidth, PatchDepth, c );
vbOffset += highestRes;
}
}
int maxCol = gridWidth - 1;
int maxRow = gridHeight - 1;
for ( int row = 0; row < gridHeight; ++row )
{
for ( int col = 0; col < gridWidth; ++col )
{
Patch left = ( col == 0 ) ? null : ( m_Patches[ col - 1, row ] );
Patch right = ( col == maxCol ) ? null : ( m_Patches[ col + 1, row ] );
Patch up = ( row == 0 ) ? null : ( m_Patches[ col, row - 1] );
Patch down = ( row == maxRow ) ? null : ( m_Patches[ col, row + 1 ] );
m_Patches[ col, row ].Link( left, right, up, down );
}
}
}
public QuadPatch( Terrain terrain, QuadPatchVertices vertices, Color patchColour, float x, float z, float w, float d )
{
m_Rs.FaceRenderMode = PolygonRenderMode.Lines;
m_Rs.Colour = patchColour;
m_Terrain = terrain;
m_Vertices = vertices;
m_X = x;
m_Z = z;
m_Width = w;
m_Depth = d;
m_IncreaseDetailDistance = float.MaxValue;
m_VbIndex = vertices.Allocate( );
m_BuildVertices = true;
m_BuildIndices = true;
}
public QuadPatchTree( Terrain terrain )
{
terrain.SetTerrainArea( Width, Height );
m_Vertices = new QuadPatchVertices( );
m_Root = new QuadPatch( terrain, m_Vertices, Color.Black, -Width / 2, -Height / 2, Width, Height );
}