protected void setDepthFunc(DrawContext dc, OrderedIcon uIcon, Vec4 screenPoint) { GL gl = dc.getGL(); if (uIcon.icon.isAlwaysOnTop()) { gl.glDepthFunc(GL.GL_ALWAYS); return; } Position eyePos = dc.getView().getEyePosition(); if (eyePos == null) { gl.glDepthFunc(GL.GL_ALWAYS); return; } double altitude = eyePos.getElevation(); if (altitude < (dc.getGlobe().getMaxElevation() * dc.getVerticalExaggeration())) { double depth = screenPoint.z - (8d * 0.00048875809d); depth = depth < 0d ? 0d : (depth > 1d ? 1d : depth); gl.glDepthFunc(GL.GL_LESS); gl.glDepthRange(depth, depth); } else if (uIcon.eyeDistance > uIcon.horizonDistance) { gl.glDepthFunc(GL.GL_EQUAL); gl.glDepthRange(1d, 1d); } else { gl.glDepthFunc(GL.GL_ALWAYS); } }