Hi Experts, If I want to create the following curve, how to do in three.s to create multiple same objects in one call, in order to be less expensive? And how to animate them all together? Should I just use Three.group? Thanks. const curve = new THREE.CatmullRomCurve3([ new THREE.Vector3( -5, 0, 5…

Something spherical, made of instanced curves :thinking: [image] Receptaculum [container] Showcase Hi community! Video: Demo: https://codepen.io/prisoner849/full/LYXGzRb This is an attempt to crossbreed these ones: Catmull-Rom curve 3D [vertex shader] How t…

Please use instancedmesh, and move each base gl_InstanceID

Thanks for your info. I’m trying it out. One more question, if I want to make those multiple curves fixed onto one single surface, like plane or ball, how to use Three.js in the regard? Thanks.

I think depends on how you define the plane/sphere in the coordinate axis. then based on normal and core point to use projection, or projection matrix

Thanks for your good examples. You are pro.

Hi Pro, Can I ask you one further question ? How about use MeshSurfaceSampler to get Vertex and Normal from any 3D object like a ball and then add other 3D object onto it? What’s the difference between using this way and your self-made examples? Thanks.

[image] S_Loan: How about use MeshSurfaceSampler to get Vertex and Normal from any 3D object like a ball and then add other 3D object onto it? Explore the source code of this example: three.js examples All the things you ask about is there [image] S_Loan: What’s the difference between u…

I’m not a technical guy. From the examples given, MeshSurfaceSampler seems to be able to do the same in the https://codepen.io/prisoner849/pen/LYXGzRb . That’s why I’m curious about the difference they make to implement the similar effect.

[image] S_Loan: I’m not a technical guy. Neither am I :slight_smile: [image] S_Loan: From the examples given, MeshSurfaceSampler seems to be able to do the same If you see it this way, don’t hesitate to implement it with MeshSurfaceSampler. Creativity is up to you :handshake:

MeshSurfaceSampler cant, Such implementations are only really possible in some simple geometries like Sphere, Cube (With cube you will need to calculate like Pavel Boytchev did), Plane. Just some simple geometry. ==> As for complex geometries. You must have another method ( SDF/Volume/DepthTexture …

How to create multiple 3D curves in one call to be less expensive

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prisoner849 October 15, 2024, 8:17pm 7

Something spherical, made of instanced curves

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How to create multiple 3D curves in one call to be less expensive

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