cam_zoom doesnt need to be repeated in RenderOptions.

docs/design/notes/gui.md

@@ -590,5 +590,5 @@ Plugin styles are blocking or ambient. And some can conflict...
 - can we somehow fold PluginsPerMap into PerMapUI? :D different API that doesnt blindly pass in all of primary field
 - Layers could be stackable modal too, but do that later. low-pri.
 - probably dont need all those methods in UIState. just a way to get the main state.
-- bulk-disable debug mode stuff in tutorial land. should be easy now!
 - dont recreate PluginCtx so many times? changing plugin API or something should help.
+- bulk-disable debug mode stuff in tutorial land. should be easy now!

editor/src/render/intersection.rs

@@ -63,7 +63,7 @@ impl Renderable for DrawIntersection {
         });
         g.draw_polygon(color, &self.polygon);
 
-        if opts.cam_zoom >= MIN_ZOOM_FOR_MARKINGS {
+        if ctx.canvas.cam_zoom >= MIN_ZOOM_FOR_MARKINGS {
             for corner in &self.sidewalk_corners {
                 g.draw_polygon(ctx.cs.get_def("sidewalk corner", Color::grey(0.7)), corner);
             }

editor/src/render/lane.rs

@@ -117,7 +117,7 @@ impl Renderable for DrawLane {
         });
         g.draw_polygon(color, &self.polygon);
 
-        if opts.cam_zoom >= MIN_ZOOM_FOR_MARKINGS {
+        if ctx.canvas.cam_zoom >= MIN_ZOOM_FOR_MARKINGS {
             for m in &self.markings {
                 m(g, ctx.cs);
             }

editor/src/render/mod.rs

@@ -54,7 +54,6 @@ pub struct RenderOptions {
     // The "main" color for the object, if available.
     pub color: Option<Color>,
     // TODO This should be accessible through ctx...
-    pub cam_zoom: f64,
     pub debug_mode: bool,
     pub is_selected: bool,
 }

editor/src/ui.rs

@@ -238,7 +238,6 @@ impl<S: UIState> GUI<RenderingHints> for UI<S> {
         {
             let opts = RenderOptions {
                 color: self.color_obj(obj.get_id(), &ctx),
-                cam_zoom: self.canvas.cam_zoom,
                 debug_mode: self.state.is_debug_mode_enabled(),
                 is_selected: self.state.is_current_selection(obj.get_id()),
             };