Method perform

src/main/java/field/graphics/BaseMesh.java:246–293

(int pass)

	}

	@Override
	public boolean perform(int pass) {

		Log.log("graphics.trace", () -> " perform pass :" + this + " / " + pass);

		if (pass == 0) {
			Integer va = GraphicsContext.get(this);
			if (va == null) {
				va = glGenVertexArrays();
				GraphicsContext.put(this, va);
				Integer finalVa1 = va;
				Log.log("graphics.trace", () -> " allocated new VA name for this " + finalVa1);
			}

			final Integer finalVa = va;
			Log.log("graphics.trace", () -> " va name is " + finalVa);
			glBindVertexArray(va);

			boolean work = false;

			trimElementLimit();
			trimVertexLimit();

			if (elements != null) work |= elements.clean(limitElement);

			LinkedHashSet<Integer> notSeen = new LinkedHashSet<>();
			notSeen.addAll(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15));

			for (ArrayBuffer b : buffers)
				if (b != null) {
					work |= b.clean(limitVertex);
					notSeen.remove(b.getAttribute());
				}

			if (work) {
				for (ArrayBuffer b : buffers)
					if (b != null) glEnableVertexAttribArray(b.getAttribute());

				for (Integer i : notSeen)
					glDisableVertexAttribArray(i);
			}

			super.update(0, this::performNow);

			glBindVertexArray(0);
		}
		return true;
	}

	protected boolean performNow() {
		return true;