//Draws a blackhole and its accretion disk
final class BlackholeNodeScript {	
	BlackholeNodeScript(Node& node) {
		node.transparent = true;
		node.customColor = true;
		node.autoCull = false;
	}
	
	void establish(Node& node, Star& star) {
		auto@ gfx = PersistentGfx();
		gfx.establish(star, "BlackholeGlitter");
		gfx.rotate(quaterniond_fromAxisAngle(vec3d_right(), pi * 0.5));
	}
	
	bool preRender(Node& node) {
		return isSphereVisible(node.abs_position, 20.0 * node.abs_scale);
	}

	void render(Node& node) {
		double dist = node.sortDistance / (2500.0 * node.abs_scale * pixelSizeRatio);
		
		if(dist < 1.0) {
			node.applyTransform();
			
			material::Blackhole.switchTo();
			model::Sphere_max.draw(node.sortDistance / (node.abs_scale * pixelSizeRatio));
			
			undoTransform();
			
			renderPlane(material::AccretionDisk, node.abs_position, node.abs_scale * 20.0, Color(0xffffffff));
		}
		
		if(dist > 0.5) {
			Color col(node.color);
			col.a = dist > 1.0 ? 255 : int((dist - 0.5)*255.0/0.5);
			renderBillboard(material::DistantStar, node.abs_position, node.abs_scale * 320.0, 0.0, col);
		}
	}
};