public override void Render(ViewControl vc) { Matrix4F normWorld = GetManipulatorMatrix(); if (normWorld == null) { return; } Util3D.RenderFlag = BasicRendererFlags.WireFrame | BasicRendererFlags.DisableDepthTest; Color xcolor = (m_hitRegion == HitRegion.XAxis) ? Color.LightSalmon : Color.Red; Color ycolor = (m_hitRegion == HitRegion.YAxis) ? Color.LightGreen : Color.Green; Color Zcolor = (m_hitRegion == HitRegion.ZAxis) ? Color.LightBlue : Color.Blue; float s; Util.CalcAxisLengths(vc.Camera, normWorld.Translation, out s); Vec3F axScale = new Vec3F(s, s, s); Matrix4F scale = new Matrix4F(); scale.Scale(axScale); Matrix4F xform = scale * normWorld; Util3D.DrawCircle(xform, Zcolor); Matrix4F rot = new Matrix4F(); rot.RotY(MathHelper.PiOver2); xform = scale * rot * normWorld; Util3D.DrawCircle(xform, xcolor); rot.RotX(MathHelper.PiOver2); xform = scale * rot * normWorld; Util3D.DrawCircle(xform, ycolor); }