OpenMetaverse.TerrainCompressor.CreateLandPacket C# (CSharp) Method

TerrainCompressor Class Documentation ファイルを表示 Open project: 3di/3di-viewer-rei-libs

CreateLandPacket() public static method

Creates a LayerData packet for compressed land data given a full simulator heightmap and an array of indices of patches to compress

public static CreateLandPacket ( float heightmap, int patches ) : LayerDataPacket
heightmap	float	A 256 * 256 array of floating point values /// specifying the height at each meter in the simulator
patches	int	Array of indexes in the 16x16 grid of patches /// for this simulator. For example if 1 and 17 are specified, patches /// x=1,y=0 and x=1,y=1 are sent
return	LayerDataPacket

        public static LayerDataPacket CreateLandPacket(float[] heightmap, int[] patches)
        {
            LayerDataPacket layer = new LayerDataPacket();
            layer.LayerID.Type = (byte)TerrainPatch.LayerType.Land;

            TerrainPatch.GroupHeader header = new TerrainPatch.GroupHeader();
            header.Stride = STRIDE;
            header.PatchSize = 16;
            header.Type = TerrainPatch.LayerType.Land;

            byte[] data = new byte[1536];
            BitPack bitpack = new BitPack(data, 0);
            bitpack.PackBits(header.Stride, 16);
            bitpack.PackBits(header.PatchSize, 8);
            bitpack.PackBits((int)header.Type, 8);

            for (int i = 0; i < patches.Length; i++)
                CreatePatchFromHeightmap(bitpack, heightmap, patches[i] % 16, (patches[i] - (patches[i] % 16)) / 16);

            bitpack.PackBits(END_OF_PATCHES, 8);

            layer.LayerData.Data = new byte[bitpack.BytePos + 1];
            Buffer.BlockCopy(bitpack.Data, 0, layer.LayerData.Data, 0, bitpack.BytePos + 1);

            return layer;
        }