do not call update 2x on the hipses, render the raytracer with depth=1 too

src/core/src/app.rs

@@ -721,7 +721,7 @@ impl App {
         }
 
         // The update from the camera
-        self.layers.update(&mut self.camera, &self.projection);
+        //self.layers.update(&mut self.camera, &self.projection);
 
         if self.request_for_new_tiles
             && Time::now() - self.last_time_request_for_new_tiles > DeltaTime::from(200.0)

src/core/src/renderable/hips/mod.rs

@@ -25,6 +25,7 @@ use crate::{shader::ShaderManager, survey::config::HiPSConfig};
 
 use crate::downloader::request::allsky::Allsky;
 use crate::healpix::{cell::HEALPixCell, coverage::HEALPixCoverage};
+use crate::math::angle::ToAngle;
 use crate::math::lonlat::LonLat;
 use crate::time::Time;
 
@@ -42,6 +43,8 @@ use std::fmt::Debug;
 use wasm_bindgen::JsValue;
 use web_sys::WebGl2RenderingContext;
 
+use super::utils::index_patch::CCWCheckPatchIndexIter;
+
 const M: f64 = 280.0 * 280.0;
 const N: f64 = 150.0 * 150.0;
 const RAP: f64 = 0.7;
@@ -586,11 +589,13 @@ impl HiPS {
         self.textures.contains_tile(cell)
     }
 
-    pub fn update(&mut self, camera: &mut CameraViewPort, projection: &ProjectionType) {
-        let raytracing = {
-            let depth = camera.get_tile_depth();
-            camera.is_allsky() || depth == 0
-        };
+    pub fn update(
+        &mut self,
+        raytracer: &RayTracer,
+        camera: &mut CameraViewPort,
+        projection: &ProjectionType,
+    ) {
+        let raytracing = raytracer.is_rendering(camera);
 
         let vertices_recomputation_needed =
             !raytracing && (self.textures.reset_available_tiles() | camera.has_moved());
@@ -814,10 +819,12 @@ impl HiPS {
                         pos.push(ndc);
                     }
 
-                    let patch_indices_iter = DefaultPatchIndexIter::new(
+                    let patch_indices_iter = CCWCheckPatchIndexIter::new(
                         &(0..=n_segments_by_side),
                         &(0..=n_segments_by_side),
                         n_vertices_per_segment,
+                        &pos,
+                        camera,
                     )
                     .flatten()
                     .map(|indices| {

src/core/src/renderable/hips/raytracing.rs

@@ -242,6 +242,6 @@ impl RayTracer {
         // Check whether the tile depth is 0 for square projection
         // definition domains i.e. Mercator
         let depth = camera.get_tile_depth();
-        camera.is_allsky() || depth == 0
+        camera.is_allsky() || depth <= 1
     }
 }

src/core/src/renderable/mod.rs

@@ -290,7 +290,7 @@ impl Layers {
                 // 1. Update the survey if necessary
                 let url = self.urls.get(layer).expect("Url should be found");
                 if let Some(survey) = self.surveys.get_mut(url) {
-                    survey.update(camera, projection);
+                    survey.update(&self.raytracer, camera, projection);
 
                     // 2. Draw it if its opacity is not null
                     survey.draw(shaders, colormaps, camera, raytracer, draw_opt)?;
@@ -614,12 +614,6 @@ impl Layers {
         ready
     }
 
-    pub fn update(&mut self, camera: &mut CameraViewPort, proj: &ProjectionType) {
-        for survey in self.surveys.values_mut() {
-            survey.update(camera, proj);
-        }
-    }
-
     // Accessors
     // HiPSes getters
     pub fn get_hips_from_layer(&self, layer: &str) -> Option<&HiPS> {