+ double visibleRegionFillRatio = Math.max(getBounds().width / visibleRegion.width, getBounds().height / visibleRegion.height);
+ double alphaFactor = map(visibleRegionFillRatio, maxVisibleRegionFillRatioForAlpha0, minVisibleRegionFillRatioForAlpha1, 0, 1);
+ alphaFactor = Math.max(0, Math.min(1, alphaFactor));
+ // we need to take the old alpha into account to support nested submodules better.
+ int oldAlpha = gc.getAlpha();
+ gc.setAlpha(Math.max(0, Math.min(255, (int) (oldAlpha * alphaFactor))));
+ renderer.render(tgc, visibleRegion.translate(-posX, -posY, 1 / submodelScale));
+ gc.setAlpha(Math.max(0, Math.min(255, (int) (oldAlpha * (1 - alphaFactor)))));
+ Font oldFont = gc.getFont();
+ Font labelFont = new Font(oldFont.getName(), 6, oldFont.getStyle());
+ gc.setFont(labelFont);
+ Point textExtent = gc.textExtent(label);
+ gc.drawText(label, posX + (getBounds().width - textExtent.x) / 2, posY + (getBounds().height - textExtent.y) / 2, true);
+ gc.setFont(oldFont);