Dear Reader, i create a tube extrusion along a curve path with 7 vertices the amount of vertices are dynamic. when i load my scene, the tube is nicely colored as expected, but when i add vertices to the curve(thus adding new faces), the newly created faces stay grey, instead of white, as the rest…

The pattern you need to use is something like this: // initialize geometry (one time) const tubeGeometry = new THREE.BufferGeometry(); const tubePositions = new THREE.BufferAttribute( new Float32Array( 30000 ), 3 ); const tubeIndex = new THREE.BufferAttribute( new Uint32Array( 10000 ), 1 ); tubeGeo…

I’m not sure disposing the geometry and then increasing its size is supported, disposal is (as far as I know…) intended to be permanent. Setting the material aside for a moment, a better pattern would be: Allocate a BufferGeometry with more vertices than you need Call geometry.setDrawRange to use…

Hi Don, thank you for sharing wisdom and time… got rid of the dispose, i thought i need it to clean the cache of my browser did set a huge drawrange tried updating the position attribute, but then the scene crashes updating the index then updating the material. no change in end result, am i us…

Hi Don, updating my ass off… :wink: i kinda tried updating everything that made a little sense to my understanding… no success yet, i hope you or someone else knows the solution… when i do not computeVertexNormals, the whole tube is similar grey on initial load, not nicely white anymore… so it …

Would it be possible to share a JSFiddle or Codepen or something like that? Note that only geometry.attributes.position.needsUpdate = true is required to update vertex positions. If you are updating the indices then similarly, a large BufferAttribute index should be allocated and updated later, not…

its a big project and do not have JSFiddle or Codepen accounts… teamviewer meeting or skype screenshare, could be an option. its a vite poject, in a private message i can send you a download link to the project… also very curious what a professional thinks of my newby 3d adventure… :wink: Since …

as long as flatshading is true, no updates needed bufInitTube.setFromPoints(arrPoints) // bufInitTube.attributes.position.needsUpdate = true // bufInitTube.drawRange.needsUpdate = true // bufInitTube.needsUpdate = true; // bufInitTube.elementsNeedUpdate = true; let myIndexArray = [] for (let i = 0…

Hi Don, did create a jsFiddle Tube Shader Issue - JSFiddle - Code Playground Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor. line 145 = flatShading line 231 = Set initial Vertex Amount In GUI, use VTX amount slider to adj…

Hi Don, Dont we all agree… a getXYZ( i ) function would be awesome… will it ever be reality?

[image] shakena: a getXYZ( i ) function would be awesome Will it do the same as: Vector3.fromBufferAttribute ?

it would do exactly the same… thank you… cheers…

Shader not updating when changing BufferGeometry

Questions

shakena May 5, 2024, 10:26am 16

Hi Don,

after some fiddling, did get it working both ways…
line 135 you can switch between points and vectors…

any ideas on how to test it on performance???

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Shader not updating when changing BufferGeometry

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