WIP GL Acre / Pixel renderer demo #6
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- using glsl es 3.0 and a basic sprite billbaord deal - using OffscreenCanvas and 2d array texture - support spin - design document - background tiles - tile sheet - layered world - curved tileset demo - element oriented drawing with implicit locaiton - faceted groups of layers
- glkit low level utiltiy module
- tilegen module for tileset particulars
- gltiles view engine
- reify texture unit cache
- moved index buffer responsibility under ElementIndex
- factored out TileRenderer
- encapsulates drawing over many layers
- abstracts gl program interface
- pushes more particulars down into layer.draw()
- inverts layer visibility control to the passed layer iterator
- may eventually erase over a better set of gltiles components, but
for now committing the sin of a "Renderer" rather than a "set of
things that you can use to render"
- more code moved into gldemo.js out of .html
- flatten away facets in passing, just layers now
- parameterize world more
- imporve world generation code coherence
- concurrently from more than one shader - more than one error from a shader - more than one error per line - strip the parsed "ERROR: N:M:" prefix
- use client size of canvas - just check at the top of every frame - move utility into glkit - prior approach called out as an anti pattern: <https://webgl2fundamentals.org/webgl/lessons/webgl-anti-patterns.html>
- generation corner sourcing was always wrong - needs to be +1 cell to cover the half cell overlap all around - therefore needs to be clipped to the nominal layer bounds - add demo ui toggles
Using canvas size is an anti pattern: <https://webgl2fundamentals.org/webgl/lessons/webgl-anti-patterns.html>
- fix mustGetAttr missing check - unbind buffers for best practice
- factor out loc center offset - add input documentation
- also add ui hookup for cell and world size
Add several other options nice for testing.
Setup to evolve cell/world size change without restart
Base layer is everything but the data, leaving DenseLayer to focus solely on its cellular xy space: - uses a proxy cell object with get/set accessors - uses null to signal at-out-of-bounds, whiche seems to work better, simplyfing caller use cases more than the exception avoidant prior Plus use of tile clearing in demo fore gen loop is a step towards regenerating the demo world without fully restarting it.
Unifies array and element buffer management, replacing prior ElementIndex and much dense layer code.
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