Blender的几何节点变得疯狂！

creating the iris of an eye in blender using X geometry has always been quite a hard thing to do and of course image textures could be a good solution for this however since geometry noes has gotten so insanely good over the last couple of years I thought it would be a great idea to create the iris of an eye using actual geometry in Geometry notes so let's open up blender 4.3 and let's get started by clicking on the cube and create a new geometry notes for it of course however in our case we do not need the actual cube of course so we're going to remove the group input and what we are going to start off with is a curve Circle note and the idea behind what we are going to do first is we're this curved Circle and and then we're going to make go from the outer part to the inside of our eye so in order to do this we are going to need a instance on points Noe and the object that we want to instance on each point of the curve circle is a curve line note so if you connect it like so then you see on each part of the curve we get a line however you see that our lines are now going straight up however we want that the rotation of the curves is dependent on the normal direction of the point that it's on so to get the normal direction of each point of this curve Circle we can just do a normal note if you connect that with the rotation then you see okay that already does something however in order to actually align these lines with the normal we're going to need an align rotation to Vector noes connect that like this and then you see they are following it however they are now going to the out side but we want them to go to the inside so let's just go over here