Open bz-next opened 5 months ago
Hello -- I already replied on Gitter, but replying here as well to not make it look like I'm ignoring this.
Artifacts with the near clip plane are a problem I'm aware of and on my list of things to fix. Enabling GL::Renderer::Feature::DepthClamp should help with that, at least in most cases. I looked around and discovered that it's now also available on WebGL, so with bb4064beda78259b7e050558971abe8c7d8f727a you should be able to use it there as well.
I'll comment here once I get back to investigating this.
I toyed around with the LineGL3D shader to render a simple debug grid:
The trouble is, when I zoom in close to the grid, the window gets filled with some artifacts:
I am just using the default LineGL3D shader with no special config.
Below is the code that generates the line objects and attaches the drawables:
And the drawable itself:
Generator for the debug line mesh:
In terms of scale: The lines themselves are 2 units long (-1.0 to 1.0 on their respective axes). They are parented to an Object3D that has a scale factor of 100 in all dimensions. That Object3D is parented to another object that has a scale factor of 0.05. The overall hierarchy is:
[scene manipulator] <- [world object (0.05x)] <- [debug lines object (100x)] <- [the lines]
The camera projection matrix is defined by
.setProjectionMatrix(Matrix4::perspectiveProjection(35.0_degf, 1.0f, 0.1f, 1000.0f))
I tried increasing my near plane from 0.1f to 1.0f since I read this helps with z-buffer artifacts, and it doesn't eliminate the issue, just changes it:
Is there something I'm doing wrong with using the shader? I've tried changing the number of points / line (ideally I'd just use 2, but I tried varying it in case it made a difference. Here I'm using 11 points.)