Possible to update vertex positions?

[nwpointer]

first off wanted to say lamina is awesome, have really enjoyed playing around with it so far!

I was interested in making some custom layers that modified vertex positions eg:

1. fullscreen layer (gl_Position = vec4(position * 2.0, 1.0) ...)
2. height-map displacement layer (gl_Position.z += texture2d(map, uv).r)

Is this kinda thing out of scope for Lamina?

took a stab at implementing these but ran into issues because the ${body.vert} is included before gl_position is set and currently gl_position is determined entirely by unmodifiable input values. (modelViewMatrix, position, & projectionMatrix).

[FarazzShaikh]

Hey! Thanks for using this!

There is an experimental Branch for vertex shader support here: https://github.com/pmndrs/lamina/tree/experimental/vertex-shaders

However, I’d recommend you to wait for the 1.1.0 release that will come out in the next couple days as it will natively support displacement layers with loads of options and a much simpler API. Here’s a sneak peek: https://github.com/pmndrs/lamina/blob/1.1.0/src/core/Displace.ts

edit: to answer your question, in current release (1.0.x) there is no vertex shader support

[nwpointer]

gotcha - thanks for the sneak peek at 1.1.0 :)

[FarazzShaikh]

Closed via 1.1.1

[michaeljblum]

Vertex manipulation looks awesome on really small objects, e.g. a sphere with args [0.5,64,64], but imperceivable on larger objects, same sphere with args [20,64,64].

I'm still learning glsl so I can't say for sure how to scale the shader's effect. Is there any way of achieving for larger objects what is readily available for much smaller ones? I tried messing around with parameters but nothing worked.