T value works also witout cad !
It's the projection of the measured point along the theo vector from the theo point.
ASSIGN/T_VAL=DOT(PT1.XYZ-PT1.TXYZ,PT1.IJK)
You can also calculate the T values on a scan (if you know the theo !)
ASSIGN/T_VAL=DOT(SCN1.HIT[1..SCN1.NUMHITS].XYZ-SCN1.HIT[1..SCN1.NUMHITS].TXYZ,SCN1.HIT[1..SCN1.NUMHITS].TIJK)
T+ is + material, T- is -material, so, as you said, a scan in a hole with T_values <0 is larger than the theo diam.
T value works also witout cad !
It's the projection of the measured point along the theo vector from the theo point.
ASSIGN/T_VAL=DOT(PT1.XYZ-PT1.TXYZ,PT1.IJK)
You can also calculate the T values on a scan (if you know the theo !)
ASSIGN/T_VAL=DOT(SCN1.HIT[1..SCN1.NUMHITS].XYZ-SCN1.HIT[1..SCN1.NUMHITS].TXYZ,SCN1.HIT[1..SCN1.NUMHITS].TIJK)
T+ is + material, T- is -material, so, as you said, a scan in a hole with T_values <0 is larger than the theo diam.
