Visions of visibility

- Add visible/skipDraw getter/setter to InstanceTree
- Minecart finally gets to resolve its TODO!

common/src/lib/java/dev/engine_room/flywheel/lib/model/part/InstanceTree.java

@@ -39,10 +39,8 @@ public final class InstanceTree {
 	private float xScale;
 	private float yScale;
 	private float zScale;
-	@ApiStatus.Experimental
+	private boolean visible = true;
-	public boolean visible = true;
+	private boolean skipDraw = false;
-	@ApiStatus.Experimental
-	public boolean skipDraw;
 
 	private boolean changed;
 
@@ -235,6 +233,48 @@ public final class InstanceTree {
 		changed = false;
 	}
 
+	/**
+	 * Set the visibility of this tree and all its children, recursively.
+	 *
+	 * @param visible Whether to make this tree visible.
+	 */
+	public void visible(boolean visible) {
+		this.visible = visible;
+
+		updateVisible();
+
+		// I think you'll get weird behavior if you mark a parent invisible and then mark its child visible.
+		// Not sure if there's a good way to solve that, though.
+		for (InstanceTree child : children) {
+			child.visible(visible);
+		}
+	}
+
+	/**
+	 * Set the visibility of this specific node in the tree.
+	 *
+	 * @param skipDraw Whether this node should skip rendering.
+	 */
+	public void skipDraw(boolean skipDraw) {
+		this.skipDraw = skipDraw;
+
+		updateVisible();
+	}
+
+	private void updateVisible() {
+		if (instance != null) {
+			instance.setVisible(visible && !skipDraw);
+		}
+	}
+
+	public boolean visible() {
+		return visible;
+	}
+
+	public boolean skipDraw() {
+		return skipDraw;
+	}
+
 	public float xPos() {
 		return x;
 	}

common/src/main/java/dev/engine_room/flywheel/vanilla/MinecartVisual.java

@@ -43,7 +43,6 @@ public class MinecartVisual<T extends AbstractMinecart> extends ComponentEntityV
 	private final Matrix4fStack stack = new Matrix4fStack(2);
 
 	private BlockState blockState;
-	private boolean active;
 
 	public MinecartVisual(VisualizationContext ctx, T entity, float partialTick, ModelLayerLocation layerLocation) {
 		super(ctx, entity, partialTick);
@@ -65,11 +64,9 @@ public class MinecartVisual<T extends AbstractMinecart> extends ComponentEntityV
 		RenderShape shape = blockState.getRenderShape();
 
 		if (shape == RenderShape.ENTITYBLOCK_ANIMATED) {
-			instances.traverse(instance -> instance.setZeroTransform().setChanged());
+			instances.visible(false);
-			active = false;
 			return null;
 		}
-		active = true;
 
 		if (shape == RenderShape.INVISIBLE) {
 			return null;
@@ -100,8 +97,7 @@ public class MinecartVisual<T extends AbstractMinecart> extends ComponentEntityV
 			return;
 		}
 
-		// TODO: add proper way to temporarily disable rendering a specific instance
+		if (!instances.visible()) {
-		if (!active) {
 			return;
 		}