/// <summary>
/// Adds the face which faces the given direction to the given chunk mesh.
/// </summary>
/// <param name="direction">The direction of the face</param>
/// <param name="chunkMesh">The reference to the chunk mesh that is going to be manipulated</param>
void AddBlockFace(FaceDirection direction, ref ChunkMesh chunkMesh)
{
Vector3 point1;
Vector3 point2;
Vector3 point3;
Vector3 point4;
// assign the points depending on the directio of the face
switch (direction)
{
case FaceDirection.south:
point1 = new Vector3(blockPos.x - 0.5f, blockPos.y + 0.5f, blockPos.z - 0.5f); // upper left front point
point2 = new Vector3(blockPos.x + 0.5f, blockPos.y + 0.5f, blockPos.z - 0.5f); // upper right front point
point3 = new Vector3(blockPos.x + 0.5f, blockPos.y - 0.5f, blockPos.z - 0.5f); // lower right front point
point4 = new Vector3(blockPos.x - 0.5f, blockPos.y - 0.5f, blockPos.z - 0.5f); // lower left front point
break;
case FaceDirection.north:
point1 = new Vector3(blockPos.x + 0.5f, blockPos.y + 0.5f, blockPos.z + 0.5f); // upper right back point
point2 = new Vector3(blockPos.x - 0.5f, blockPos.y + 0.5f, blockPos.z + 0.5f); // upper left back point
point3 = new Vector3(blockPos.x - 0.5f, blockPos.y - 0.5f, blockPos.z + 0.5f); // lower left back point
point4 = new Vector3(blockPos.x + 0.5f, blockPos.y - 0.5f, blockPos.z + 0.5f); // lower right back poin
break;
case FaceDirection.west:
point1 = new Vector3(blockPos.x - 0.5f, blockPos.y + 0.5f, blockPos.z + 0.5f); // upper left back point
point2 = new Vector3(blockPos.x - 0.5f, blockPos.y + 0.5f, blockPos.z - 0.5f); // upper left front point
point3 = new Vector3(blockPos.x - 0.5f, blockPos.y - 0.5f, blockPos.z - 0.5f); // lower left front point
point4 = new Vector3(blockPos.x - 0.5f, blockPos.y - 0.5f, blockPos.z + 0.5f); // lower left back point
break;
case FaceDirection.east:
point1 = new Vector3(blockPos.x + 0.5f, blockPos.y + 0.5f, blockPos.z - 0.5f); // upper right front point
point2 = new Vector3(blockPos.x + 0.5f, blockPos.y + 0.5f, blockPos.z + 0.5f); // upper right back point
point3 = new Vector3(blockPos.x + 0.5f, blockPos.y - 0.5f, blockPos.z + 0.5f); // lower right back point
point4 = new Vector3(blockPos.x + 0.5f, blockPos.y - 0.5f, blockPos.z - 0.5f); // lower right front poin
break;
case FaceDirection.down:
point1 = new Vector3(blockPos.x - 0.5f, blockPos.y - 0.5f, blockPos.z - 0.5f); // lower left front point
point2 = new Vector3(blockPos.x + 0.5f, blockPos.y - 0.5f, blockPos.z - 0.5f); // lower right front point
point3 = new Vector3(blockPos.x + 0.5f, blockPos.y - 0.5f, blockPos.z + 0.5f); // lower right back point
point4 = new Vector3(blockPos.x - 0.5f, blockPos.y - 0.5f, blockPos.z + 0.5f); // upper left front point
break;
default: // default case is to add the upper face
point1 = new Vector3(blockPos.x - 0.5f, blockPos.y + 0.5f, blockPos.z + 0.5f); // upper left back point
point2 = new Vector3(blockPos.x + 0.5f, blockPos.y + 0.5f, blockPos.z + 0.5f); // upper right back point
point3 = new Vector3(blockPos.x + 0.5f, blockPos.y + 0.5f, blockPos.z - 0.5f); // upper right front point
point4 = new Vector3(blockPos.x - 0.5f, blockPos.y + 0.5f, blockPos.z - 0.5f); // upper left front point
break;
}
// add the mesh data to the chunk mesh
chunkMesh.AddFace(point1, point2, point3, point4);
// add the uv coordinates of the face
Vector2[] uvCoords = GetFaceUVCoordinates(direction);
chunkMesh.AddUVCoordinates(uvCoords);
}