GUI_CIRCLE_LUT

Vertex format for GUI circle LUT shader.

• UV0: Quad-local UV (0..1). Shader remaps this to -1,1 to evaluate circle SDF.

• UV2.x: LUT row index in net.ccbluex.liquidbounce.render.gui.GuiCircleLutAtlas.

• UV2.y: Encoded inner radius ratio (0..32767 => 0..1).