-
Angle Measure expression
Hello all,
I was just wondering if there was an expression to display an angle between two lines?
If i had two lines generated to a persons leg, could i write an expression to show me the angle between them as the person was to squat down?
Thank you
-
15 Replies
-
How are you creating the lines?
Dan
-
At the moment I am using Generate>Beam, but is there is a better way i’m all for it.
-
Depending on how you have things set up, some variation of this should work:
beam1 = thisComp.layer(“Beam Layer”).effect(“Beam”);
beam2 = thisComp.layer(“Beam Layer”).effect(“Beam 2”);
v1 = beam1(“Ending Point”) – beam1(“Starting Point”);
v2 = beam2(“Ending Point”) – beam2(“Starting Point”);
radiansToDegrees(Math.acos(dot(normalize(v1),normalize(v2))))Dan
-
And which layer(s) should i put this into?
I don’t use expressions that often, so i’m a little new to this. -
If you want to display it, I’d put it in the Source Text property of a text layer in the same comp.
Dan
-
ok so all of
beam1 = thisComp.layer(“Beam Layer”).effect(“Beam”);
beam2 = thisComp.layer(“Beam Layer”).effect(“Beam 2”);
v1 = beam1(“Ending Point”) – beam1(“Starting Point”);
v2 = beam2(“Ending Point”) – beam2(“Starting Point”);
radiansToDegrees(Math.acos(dot(normalize(v1),normalize(v2))))goes into the text layer, as long as my two beam layers are called ‘beam1’ and ‘beam2’?
-
The way the expression is written, it’s expecting two Beam effects (“Beam” and “Beam 2”) on a single layer (“Beam Layer”). It would be easy to change though, if your beams were on separate layers (“Beam Layer 1” and “Beam Layer 2”). That would be more like this:
beam1 = thisComp.layer(“Beam Layer 1”).effect(“Beam”);
beam2 = thisComp.layer(“Beam Layer 2”).effect(“Beam”);
v1 = beam1(“Ending Point”) – beam1(“Starting Point”);
v2 = beam2(“Ending Point”) – beam2(“Starting Point”);
radiansToDegrees(Math.acos(dot(normalize(v1),normalize(v2))))Dan
-
Ok thank you, I’ll play about with it and see what I get.
-
In the current situation, the expression is outputting “0”
I’ve tried moving the beams and rotating them but no change.
-
Hard to say without seeing how you have it set up. The expression assumes that the beam layers are not rotated or non-uniformly scaled. If that’s not the case, the expression needs to be more complex.
Dan
Reply to this Discussion! Login or Sign Up