Check if block is in FOV of player?

[Jelly298]

I want to check if a block can be seen by a player given its FOV (It is client-sided). Is there any function or algorithm that could help me do so?

[warjort]

I don't think it works that way. But I am no expert on this.

The FOV can be altered dynamically during rendering, including Forge's ComputeFovModifierEvent. e.g. the zoom in when pulling a bow before firing

I don't think it remembers this change after it is done with rendering.

 

And the way blocks are drawn is done by sending their model data to opengl which computes which "pixels" should have which color by drawing the textures and doing a depth test versus what has previously been drawn there.

This rendering is done in world (block) co-ordinates and only when it is complete is the buffer mapped into screen co-ordinates.

See RenderTarget._blitToScreen()

The culling of which blocks/entities should be drawn is done at the chunk level rather than individual blocks. Which means it is drawing some blocks that are offscreen.

See LevelRenderer.applyFrustrum()

 

You will likely get a better answer to your question if you contacted the projects that work on graphics optimisations.