MTLAttributeFormat.char3 A three-component vector with 8-bit, signed integer values. Declarationcase char3 See Also8-bit integer formatsMTLAttributeFormat.charMTLAttributeFormat.char2MTLAttributeFormat.char4MTLAttributeFormat.ucharMTLAttributeFormat.uchar2MTLAttributeFormat.uchar3MTLAttributeFormat.uchar4