-
Z Rotation based on camera proximity??
I’m clearly missing something critical. Any assitance will be gratefully appreciated.
I’ve tried the following expression:
startR =150// start rotation 150 pixels from camera
endR = 0; // end rotation 0 pixels from camera
C= thisComp.activeCamera;
P = length(toWorld(anchorPoint),C.toWorld([0,0,0]));
linear(P,startR,endR,0,-20)//0 degrees at start minus 20 at endThis yields odd results though I can’t see my error. The layer rotates but the distance from the camera isn’t accurate. In fact the layer starts in the rotated position and rotates to 0 as the camera approaches…
Thanks.
-
3 Replies
-
Trying your expression, the distances work for me; with x and y equal for camera and rotating layer, when the z gets within 150 pixels it makes the rotating layer start to rotate.
The only change I can see is to switch the 0, and -20 to make the last line this:
linear(P,startR,endR,-20,0)//0 degrees at start minus 20 at end
That works in a test.
-
I’d reversed the values in the final line…. Doh!
With some assistance from Adobe Expression reference:
startR = 800; //start rotation 800 pixels from camera
endR = 300; //end rotation 300 pixels from camera
C = thisCoe.activeCamera.toWorld([0,0,0]);
P = toWorld(anchorPoint);
d = length(C,P);
linear(d,startR,endR,-20,0) -
Thanks Mike. While you were posting I had some caffiene and my discovered my error as well.
Many thanks.
Reply to this Discussion! Login or Sign Up