MTLVertexFormat.char3 A three-component vector with 8-bit, signed integer values. Declarationcase char3 See Also8-bit integer formatsMTLVertexFormat.charMTLVertexFormat.char2MTLVertexFormat.char4MTLVertexFormat.ucharMTLVertexFormat.uchar2MTLVertexFormat.uchar3MTLVertexFormat.uchar4