/// <summary>
/// (Internal) Updates the VBO data for a given tile.
/// </summary>
/// <param name="x">Tile X INDEX (not position) in the VBO</param>
/// <param name="y">Tile Y INDEX (not position) in the VBO</param>
/// <param name="xPos">Tile X POSITION (not index) on the screen</param>
/// <param name="yPos">Tile Y POSITION (not index) on the screen</param>
/// <param name="tile">Tile index</param>
/// <param name="color">Tile color</param>
/// <param name="tilemap">Tilemap from which to load the tile</param>
/// <param name="vfx">Special shader VFX to use for this tile</param>
internal void UpdateTileData(int x, int y, float xPos, float yPos, int tile, RGBColor color, int tilemap = 0, TileVFX vfx = TileVFX.None)
{
if ((x < 0) || (y < 0) || (x >= Columns) || (y >= Rows))
{
return; // Tile index is out of bounds
}
int index = y * Columns + x;
int tileY = tile / Renderer.TilemapCount.Width;
int tileX = tile - tileY * Renderer.TilemapCount.Width;
float[] vertexData = new float[FLOATS_PER_VERTEX * 4];
Color4 color4 = color.ToColor4();
for (int i = 0; i < 4; i++)
{
Array.Copy(
new float[]
{
xPos + TILE_CORNERS[i].X,
yPos + TILE_CORNERS[i].Y,
color4.R, color4.G, color4.B,
(tileX + TILE_CORNERS[i].X) * Renderer.TileUV.Width,
(tileY + TILE_CORNERS[i].Y) * Renderer.TileUV.Height,
tilemap, (float)vfx
},
0, vertexData, FLOATS_PER_VERTEX * i, FLOATS_PER_VERTEX);
}
GL.BindBuffer(BufferTarget.ArrayBuffer, Handle);
GL.BufferSubData(BufferTarget.ArrayBuffer, (IntPtr)(index * BYTES_PER_TILE), BYTES_PER_TILE, vertexData);
}
