Contact point visualization tool

nataddrho

nataddrho

www.digicue.net
Silver Member
I made this a long time ago. It is just sitting on my computer buried in files from the past.

I don't know how useful it is or really WHY I made it, but it exists. lol

You can change the target "pockets" by clicking on them.

contactpoint - Google Drive

drive.google.com drive.google.com

1699936559387.png


1699936584642.png

1699936646982.png
 
nataddrho said:
I made this a long time ago. It is just sitting on my computer buried in files from the past.

I don't know how useful it is or really WHY I made it, but it exists. lol

You can change the target "pockets" by clicking on them.

contactpoint - Google Drive

drive.google.com drive.google.com

View attachment 727597

View attachment 727598
View attachment 727599
Click to expand...
If you scribe an ellipse representing the equator of the cue ball, you can easily "see" the front of the ball and how the contact point sits on it.
 
straightline said:
If you scribe an ellipse representing the equator of the cue ball, you can easily "see" the front of the ball and how the contact point sits on it.
Click to expand...
But with caution, as explained in Kranicki's Pool Player's Prayers:
  • The perception of the equator changes as the head lowers into the full stance
  • People see the equator (and therefore, the contact point) as higher than it is and therefore hit the ball too thick
 
BilliardsAbout said:
But with caution, as explained in Kranicki's Pool Player's Prayers:
  • The perception of the equator changes as the head lowers into the full stance
  • People see the equator (and therefore, the contact point) as higher than it is and therefore hit the ball too thick
Click to expand...
Here's an easy way to see it. In pre-stance looking down the shot at the object ball, simply duplicate the contact point on the cue ball. That's correct; facing you on and on the same side as on the object ball. A line from that point through center sphere will show <the> contact point equidistant from center sphere. If you lower your view, the ellipse will of course flatten but you can do the same "schtick" from the duplicate contact through center sphere out to the actual point. In 2D, the line always rises through center ball and ends at the contact point. You connect the termination point to the contact point on the object ball. Done.
 
BilliardsAbout said:
But with caution, as explained in Kranicki's Pool Player's Prayers:
  • The perception of the equator changes as the head lowers into the full stance
  • People see the equator (and therefore, the contact point) as higher than it is and therefore hit the ball too thick
Click to expand...
Actually that is a good point
 
straightline said:
Here's an easy way to see it. In pre-stance looking down the shot at the object ball, simply duplicate the contact point on the cue ball. That's correct; facing you on and on the same side as on the object ball. A line from that point through center sphere will show <the> contact point equidistant from center sphere. If you lower your view, the ellipse will of course flatten but you can do the same "schtick" from the duplicate contact through center sphere out to the actual point. In 2D, the line always rises through center ball and ends at the contact point. You connect the termination point to the contact point on the object ball. Done.
Click to expand...
I'm having trouble following you, but want to learn more. Would you mind posting a diagram?
 
BilliardsAbout said:
I'm having trouble following you, but want to learn more. Would you mind posting a diagram?
Click to expand...

It's pretty simple. Say you're cutting a ball off in the distance to the right.
CP.jpg

This is your cue-ball duplicating the contact point on the object ball. The blue line connects the point duped from the object ball to its own contact point on the far side. Without the ellipse you can see the blue line simply angles upward through the center of the sphere and terminates at a point equidistant to the < face to center> segment.
This may take a bit of eye training for some but it's not that difficult and like drawing, doesn't need to be photorealistic to work. I get perfect looking results even with the limited practice I'm getting these days.
 
BilliardsAbout said:
But with caution, as explained in Kranicki's Pool Player's Prayers:
  • The perception of the equator changes as the head lowers into the full stance
  • People see the equator (and therefore, the contact point) as higher than it is and therefore hit the ball too thick
Click to expand...
I wonder if that’s why dominant eye (or better yet “vision center”) is so useful. I found my vision center through shooting. I took a shot that looked right while standing, looked right while down, and missed fat. Lined the cue under a different eye and missed thin. Lined the cue somewhere in between and got closer. One small adjustment from there and suddenly what looks right standing, looks right down also leads to making the ball. I wonder if what I really found was the head position that compensates for that distortion when getting down.
 
You must log in or register to reply here.
Back
Top