Sign of life

- Move all text handling into the TextVisual class
- Add SignVisual
- Flesh out the glyph model cache
- Render effect glyphs
- Clean up variable names

common/src/backend/java/dev/engine_room/flywheel/backend/engine/EngineImpl.java

@@ -90,6 +90,7 @@ public void onLightUpdate(SectionPos sectionPos, LightLayer layer) {
 	@Override
 	public void setupRender(RenderContext context) {
 		try (var state = GlStateTracker.getRestoreState()) {
+			// Process the render queue for font updates
 			RenderSystem.replayQueue();
 			Uniforms.update(context);
 			environmentStorage.flush();

common/src/lib/java/dev/engine_room/flywheel/lib/instance/GlyphInstance.java

@@ -83,6 +83,10 @@ public GlyphInstance color(int red, int green, int blue) {
 		return color((byte) red, (byte) green, (byte) blue);
 	}
 
+	public GlyphInstance color(float red, float green, float blue, float alpha) {
+		return color((byte) (red * 255f), (byte) (green * 255f), (byte) (blue * 255f), (byte) (alpha * 255f));
+	}
+
 	public GlyphInstance color(byte red, byte green, byte blue, byte alpha) {
 		this.red = red;
 		this.green = green;