Fix light animations so they are removed when the light turns off.

voxygen/src/hud/mod.rs

@@ -170,6 +170,7 @@ widget_ids! {
         time,
         entity_count,
         num_chunks,
+        num_lights,
         num_figures,
 
         // Game Version
@@ -235,6 +236,7 @@ pub struct DebugInfo {
     pub velocity: Option<comp::Vel>,
     pub ori: Option<comp::Ori>,
     pub num_chunks: u32,
+    pub num_lights: u32,
     pub num_visible_chunks: u32,
     pub num_shadow_chunks: u32,
     pub num_figures: u32,
@@ -1404,13 +1406,21 @@ impl Hud {
             .font_size(self.fonts.cyri.scale(14))
             .set(self.ids.num_chunks, ui_widgets);
 
+            // Number of lights
+            Text::new(&format!("Lights: {}", debug_info.num_lights,))
+                .color(TEXT_COLOR)
+                .down_from(self.ids.num_chunks, 5.0)
+                .font_id(self.fonts.cyri.conrod_id)
+                .font_size(self.fonts.cyri.scale(14))
+                .set(self.ids.num_lights, ui_widgets);
+
             // Number of figures
             Text::new(&format!(
                 "Figures: {} ({} visible)",
                 debug_info.num_figures, debug_info.num_figures_visible,
             ))
             .color(TEXT_COLOR)
-            .down_from(self.ids.num_chunks, 5.0)
+            .down_from(self.ids.num_lights, 5.0)
             .font_id(self.fonts.cyri.conrod_id)
             .font_size(self.fonts.cyri.scale(14))
             .set(self.ids.num_figures, ui_widgets);

voxygen/src/render/consts.rs

@@ -34,8 +34,12 @@ impl<T: Copy + gfx::traits::Pod> Consts<T> {
         vals: &[T],
         offset: usize,
     ) -> Result<(), RenderError> {
-        encoder
-            .update_buffer(&self.buf, vals, offset)
-            .map_err(RenderError::UpdateError)
+        if vals.len() > 0 {
+            encoder
+                .update_buffer(&self.buf, vals, offset)
+                .map_err(RenderError::UpdateError)
+        } else {
+            Ok(())
+        }
     }
 }

voxygen/src/scene/figure/mod.rs

@@ -41,7 +41,7 @@ use core::{
 };
 use guillotiere::AtlasAllocator;
 use hashbrown::HashMap;
-use specs::{Entity as EcsEntity, Join, WorldExt};
+use specs::{Entity as EcsEntity, Join, LazyUpdate, WorldExt};
 use treeculler::{BVol, BoundingSphere};
 use vek::*;
 
@@ -365,6 +365,7 @@ impl FigureMgr {
             }
         }
         let dt = ecs.fetch::<DeltaTime>().0;
+        let updater = ecs.read_resource::<LazyUpdate>();
         for (entity, waypoint, light_emitter_opt, light_anim) in (
             &ecs.entities(),
             ecs.read_storage::<common::comp::Waypoint>().maybe(),
@@ -377,7 +378,7 @@ impl FigureMgr {
                 if let Some(emitter) = light_emitter_opt {
                     (
                         emitter.col,
-                        if emitter.strength.is_finite() {
+                        if emitter.strength.is_normal() {
                             emitter.strength
                         } else {
                             0.0
@@ -394,7 +395,7 @@ impl FigureMgr {
             if let Some(state) = self.states.character_states.get(&entity) {
                 light_anim.offset = state.lantern_offset;
             }
-            if !light_anim.strength.is_finite() {
+            if !light_anim.strength.is_normal() {
                 light_anim.strength = 0.0;
             }
             if animated {
@@ -408,6 +409,18 @@ impl FigureMgr {
                 light_anim.strength = target_strength;
                 light_anim.col = target_col;
             }
+            // NOTE: We add `LIGHT_EPSILON` because if we wait for numbers to become
+            // equal to target (or even within a subnormal), it will take a minimum
+            // of 30 seconds for a light to fully turn off (for initial
+            // strength ≥ 1), which prevents optimizations (particularly those that
+            // can kick in with zero lights).
+            const LIGHT_EPSILON: f32 = 0.0001;
+            if (light_anim.strength - target_strength).abs() < LIGHT_EPSILON {
+                light_anim.strength = target_strength;
+                if light_anim.strength == 0.0 {
+                    updater.remove::<LightAnimation>(entity);
+                }
+            }
         }
     }
 

voxygen/src/scene/mod.rs

@@ -304,6 +304,9 @@ impl Scene {
     /// Get a reference to the scene's terrain.
     pub fn terrain(&self) -> &Terrain<TerrainChunk> { &self.terrain }
 
+    /// Get a reference to the scene's lights.
+    pub fn lights(&self) -> &Vec<Light> { &self.light_data }
+
     /// Get a reference to the scene's figure manager.
     pub fn figure_mgr(&self) -> &FigureMgr { &self.figure_mgr }
 
@@ -466,9 +469,11 @@ impl Scene {
                     .read_storage::<comp::LightAnimation>(),
             )
                 .join()
-                .filter(|(pos, _, _, _)| {
-                    (pos.0.distance_squared(player_pos) as f32)
-                        < loaded_distance.powf(2.0) + LIGHT_DIST_RADIUS
+                .filter(|(pos, _, _, light_anim)| {
+                    light_anim.col != Rgb::zero()
+                        && light_anim.strength > 0.0
+                        && (pos.0.distance_squared(player_pos) as f32)
+                            < loaded_distance.powf(2.0) + LIGHT_DIST_RADIUS
                 })
                 .map(|(pos, ori, interpolated, light_anim)| {
                     // Use interpolated values if they are available
@@ -1435,8 +1440,10 @@ impl Scene {
 
         // would instead have this as an extension.
         if renderer.render_mode().shadow.is_map() && (is_daylight || self.light_data.len() > 0) {
-            // Set up shadow mapping.
-            renderer.start_shadows();
+            if is_daylight {
+                // Set up shadow mapping.
+                renderer.start_shadows();
+            }
 
             // Render terrain shadows.
             self.terrain.render_shadows(
@@ -1462,8 +1469,10 @@ impl Scene {
                 scene_data.figure_lod_render_distance,
             );
 
-            // Flush shadows.
-            renderer.flush_shadows();
+            if is_daylight {
+                // Flush shadows.
+                renderer.flush_shadows();
+            }
         }
         let lod = self.lod.get_data();
 

voxygen/src/session.rs

@@ -697,6 +697,7 @@ impl PlayState for SessionState {
                         .get(self.client.borrow().entity())
                         .cloned(),
                     num_chunks: self.scene.terrain().chunk_count() as u32,
+                    num_lights: self.scene.lights().len() as u32,
                     num_visible_chunks: self.scene.terrain().visible_chunk_count() as u32,
                     num_shadow_chunks: self.scene.terrain().shadow_chunk_count() as u32,
                     num_figures: self.scene.figure_mgr().figure_count() as u32,