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swampthang

autoRotate immediateRender?

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Using a bezier path, I'd love for there to be an option for autoRotate like immediateRender works for autoAlpha. In the pen, you see the plane starts off with no rotation and then abruptly rotates. Is there a way to accomplish this using any current settings? If I seek to something like 0.01, I get the initial rotation which is what I'd love to see right from the start.

See the Pen gQVRRQ?editors=0010 by swampthang (@swampthang) on CodePen

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Unless I'm missing something, I don't think it will do that.

 

I just calculate it myself. Using the next control point will point it in the right direction.

 

let bez = MorphSVGPlugin.pathDataToBezier(path);
let rotation = Math.atan2(bez[1].y - bez[0].y, bez[1].x - bez[0].x) + "_rad";
TweenMax.set(plane,{x: bez[0].x, y: bez[0].y, rotation });

 

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Awesome, Blake! Thanks. My app offers an image rotation knob so I added conversion to percentage so I could add as rotation offset value.

 

Here's a forked pen with that added in. You can set the rotationOffset and it'll add it. I set the rotation offset to -10 degrees.

 

See the Pen RqXyZX by swampthang (@swampthang) on CodePen

 

Edited by swampthang
Clarification of settings.
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I'm noticing that doesn't work every time because some paths are returning duplicate values for the [0] and [1] items in the bezier array. Check out this version. Notice that bez[0] and bez[1] are the same values....

 

See the Pen YRmvZW?editors=0010 by swampthang (@swampthang) on CodePen

 

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Yeah, it looks like you just have a weird path. The first control point is at the start (c0,0).

 

M95.6,505c0,0

 

You could check for that condition like this.

 

let p0 = bez[0];
let p1 = bez[1];
  
if (p0.x === p1.x && p0.y === p1.y) {
  p1 = bez[2];
}
  
let rad = (Math.atan2(p1.y - p0.y, p1.x - p0.x)) * (180 / Math.PI);

 

 

 

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Hehe. Posted at the same time, but a loop like you did is probably better.

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Another clean solution! Thanks, Jack.

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  • 2 weeks later...

Just wanted to add this to the codepen stack in case anyone might get something out of it. I'm setting transformOrigin for rotation to happen at the end of a path and added a draggable to a rotation knob and a box that stays centered around the end point of the path. You can rotate the knob or enter a new offset value in either of the 2 fields.

See the Pen vQLLMN?editors=0110 by swampthang (@swampthang) on CodePen

 

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