hexagon logo
Register Sign in
  • Replies 6 replies
  • Subscribers 221 subscribers
  • Views 104 views
  • Users 0 members are here
Options
Related

How to construct circles with different math methods from hit points data?

RobOntario
Happy Friday! Can not wait to watch my boy play Hockey game tomorrow afternoon. Slight smile
From other threads, I knew we can construct features from points data with different math methods.
The core manual is perfect, but I could not help try right away.

I had a circle C1 now, since I could not construct circle with F9, so constructed a circle with other points and replaced with hit data, but it did not work well.
Can we type those construct command ? And how to work on with hit data for those?

Thank you for any help




Attached Files
Parents
  • Better off using a closed scan then using those points to construct your various circles. 


    SC_B1 =FEAT/SCAN,LINEARCLOSE,NUMBER OF HITS=103,SHOW HITS=NO,SHOWALLPARAMS=NO
MEAS/SCAN
BASICSCAN/LINE,NUMBER OF HITS=103,SHOW HITS=NO,SHOWALLPARAMS=NO
ENDSCAN
ENDMEAS/
CIRCLE1 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO
THEO/<-0.0005,0,-8>,<0,0,1>,8.235
ACTL/<-0.0005,0,458.5778>,<0,0,1>,8.235
CONSTR/CIRCLE,BF,2D,SC_B1.HIT[1..SC_B1.NUMHITS],,
OUTLIER_REMOVAL/OFF,3
FILTER/OFF,UPR=0
CIRCLE1 =FEAT/CIRCLE,CARTESIAN,OUT,MAX_INSC,NO
THEO/<-0.0005,0,-8>,<0,0,1>,8.235
ACTL/<-0.0005,0,458.5778>,<0,0,1>,8.235
CONSTR/CIRCLE,BF,2D,SC_B1.HIT[1..SC_B1.NUMHITS],,
OUTLIER_REMOVAL/OFF,3
FILTER/OFF,UPR=0
    ​

    Thank you so much.

    But How can we input those? :

    CIRCLE1 =FEAT/CIRCLE,CARTESIAN,OUT,LEAST_SQR,NO
    THEO/<-0.0005,0,-8>,<0,0,1>,8.235
    ACTL/<-0.0005,0,458.5778>,<0,0,1>,8.235
    CONSTR/CIRCLE,BF,2D,SC_B1.HIT[1..SC_B1.NUMHITS],,
    OUTLIER_REMOVAL/OFF,3
    FILTER/OFF,UPR=0
    ?​
  • in reply to RobOntario
    The only time there should not be any difference between BF and BFRE constructions would be when a non-contact sensor was used to gather the data (laser scanner / vision camera). For all tactile sensors, there should always be a difference. This is because BF constructions take the previously compensated hits and construct a feature through them, whereas BFRE take the hit centroids (the RAWHITS), construct the feature through those centroids and then apply compensation based on the newly computed feature. The amount of difference will vary depending on how "good" the original hits were - it's a bit like removing the cosine error.
Reply
  • in reply to RobOntario
    The only time there should not be any difference between BF and BFRE constructions would be when a non-contact sensor was used to gather the data (laser scanner / vision camera). For all tactile sensors, there should always be a difference. This is because BF constructions take the previously compensated hits and construct a feature through them, whereas BFRE take the hit centroids (the RAWHITS), construct the feature through those centroids and then apply compensation based on the newly computed feature. The amount of difference will vary depending on how "good" the original hits were - it's a bit like removing the cosine error.
Children
No Data
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement