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Example webgpu_tsl_editor: Simple uv.x animation #26368

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merged 1 commit into from
Jul 4, 2023

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sunag
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@sunag sunag commented Jul 4, 2023

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Improving the example a bit.

@sunag sunag added this to the r155 milestone Jul 4, 2023

const timer = timerLocal( .5 ); // .5 is speed
const uv0 = uv();
const animateUv = vec2( uv0.x.add( oscSine( timer ) ), uv0.y );
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By the way... Could we try adding support for something like vectorVariable.x.addAssign( something ), based on how we have that for VarNodes?

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Interesting you think this, because I was drafting something similar but using setXYZ(), like node.setX( x ), maybe node.addX( node ) too. I think that node.x.addAssign() seems more complicated.

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I like node.x.assign/addAssign more because it better mirrors the shader code -- i.e. var.x = something or var.x += something. It also feels more understandable for me.
(And to add all the *Assign things we should only add assign support for SplitNode -- other *Assigns will be supported automatically)

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It looks good 👍

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Merging now, anyway better to create a new PR for it.

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Would you rather work on it, or I work on it?

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@sunag sunag Jul 4, 2023

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Hmm... worries me a bit the users use just uv0.x.addAssign( oscSine( timer ) ); instead of const animateUv = uv0.x.addAssign( oscSine( timer ) );

const animateUv = uv0.x.addAssign( oscSine( timer ) );

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Maybe we should just note somewhere that they should either do const animateUv = temp( uv() ); animateUv.x.addAssign( oscSine( timer ) ) or const uv0 = uv(); const animateUv = uv0.x.addAssign( oscSine( timer ) ).

Would you rather work on it, or I work on it?

I think you can implement this better than me 👍

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// Example 1
const animateUv = temp( uv() ); 
animateUv.x.addAssign( oscSine( timer ) );

// Example 2
const uv0 = uv(); 
const animateUv = uv0.x.addAssign( oscSine( timer ) );

// Example 3
const uv0 = uv(); 
const animateUv = uv0.addX( oscSine( timer ) );

It seems that we have 3 options at now, .set*(), .add*() still seems more simple for me.

I think you can implement this better than me 👍

Thanks, but you'd do a great job all the same.

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It seems that we have 3 options at now, .set*(), .add*() still seems more simple for me.

I think we can try to support both first two options -- we can check in SplitNode whether the node it's acting on is VarNode, and if it is not it automatically makes it a such.

@sunag sunag merged commit 775ff28 into mrdoob:dev Jul 4, 2023
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2 participants