Initial implementation of indoor camera. Enclosure detection and camera switch

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+
 - New level of detail feature, letting you see all the world's terrain at any view distance.
 - Point and directional lights now cast realistic shadows, using shadow mapping.
 - Added leaf and chimney particles
@@ -20,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Adaptive stride setup for more dynamic run behavior
 - Theropod body
 - Several new animals
+- Added a separate camera mode for when the player is indoors
 
 ### Changed
 
@@ -95,11 +97,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add detection of entities under the cursor
 - Functional group-system with exp-sharing and disabled damage to group members
 - Some Campfire, fireball & bomb; particle, light & sound effects.
-- Added firework recipe
-- Added setting to change resolution
-- Rare (unfinished) castles
-- Caves with monsters and treasure
-- Furniture and decals in towns
 
 ### Changed
 

common/src/ray.rs

@@ -96,4 +96,71 @@ impl<'a, V: ReadVol, F: RayUntil<V::Vox>, G: RayForEach<V::Vox>> Ray<'a, V, F, G
 
         (dist, Ok(None))
     }
+
+    ///
+    /// Unlike cast(), this method traverses the whole ray identifying
+    /// "edges". Edges are defined as the point where the until condition
+    /// switches from false to true, or true to false.
+    ///
+    /// It then returns the last edge's distance.
+    pub fn last_edge_cast(mut self) -> Result<f32, V::Error> {
+        const PLANCK: f32 = 0.001;
+
+        let mut dist = 0.0;
+        let dir = (self.to - self.from).normalized();
+        let max = (self.to - self.from).magnitude();
+
+        let mut until_condition_met = true;
+
+        let mut distances = vec![];
+
+        for _ in 0..self.max_iter {
+            let pos = self.from + dir * dist;
+            let ipos = pos.map(|e| e.floor() as i32);
+
+            // Allow one iteration above max.
+            if dist > max {
+                break;
+            }
+
+            let vox = self.vol.get(ipos);
+
+            // for_each
+            if let Some(g) = &mut self.for_each {
+                if let Ok(vox) = vox {
+                    g(vox, ipos);
+                }
+            }
+
+            match vox.map(|vox| (vox, (self.until)(vox))) {
+                Ok((_vox, true)) => {
+                    if !until_condition_met {
+                        // This is an edge
+                        distances.push(dist);
+                        until_condition_met = true;
+                    }
+                },
+                Ok((_vox, false)) => {
+                    if until_condition_met {
+                        // This is also an edge
+                        distances.push(dist);
+                        until_condition_met = false;
+                    }
+                },
+                Err(err) if !self.ignore_error => return Err(err),
+                _ => {},
+            }
+
+            let deltas =
+                (dir.map(|e| if e < 0.0 { 0.0 } else { 1.0 }) - pos.map(|e| e.abs().fract())) / dir;
+
+            dist += deltas.reduce(f32::min).max(PLANCK);
+        }
+
+        if !distances.is_empty() {
+            Ok(distances[distances.len() - 1])
+        } else {
+            Ok(dist)
+        }
+    }
 }

voxygen/src/scene/camera.rs

@@ -1,5 +1,6 @@
 use common::{
     span,
+    terrain::TerrainGrid,
     vol::{ReadVol, Vox},
 };
 use std::f32::consts::PI;
@@ -48,6 +49,9 @@ pub struct Camera {
 
     last_time: Option<f64>,
 
+    enclosed: bool,
+    enclosed_last_checked: Option<Vec3<f32>>,
+
     dependents: Dependents,
     frustum: Frustum<f32>,
 }
@@ -68,6 +72,11 @@ impl Camera {
 
             last_time: None,
 
+            // Whether the camera was detected to be inside of a structure. Switches us to indoor
+            // camera.
+            enclosed: false,
+            enclosed_last_checked: None,
+
             dependents: Dependents {
                 view_mat: Mat4::identity(),
                 proj_mat: Mat4::identity(),
@@ -78,13 +87,146 @@ impl Camera {
         }
     }
 
+    ///
+    /// Estimate whether the player is indoors with rays from their position
+    /// The player is marked "enclosed" if >= 75% of the rays hit a solid block
+    pub fn check_enclosure(&mut self, terrain: &TerrainGrid) {
+        // We can expose these values in the settings at some point if they become a
+        // performance concern
+        let vertical_resolution = 3;
+        let horizontal_resolution = 12;
+        let ray_distance = 30.0;
+        let raycast_resolution = 50;
+
+        let mut total = 0;
+        let mut hit = 0;
+
+        for horizontal in 0..horizontal_resolution {
+            // Do a ray horizontally out from the player to check for things
+            let horizontal_angle = (horizontal as f32 * PI) / (horizontal_resolution as f32 / 2.0);
+            let (start, end) = (
+                self.focus,
+                self.focus
+                    + (Vec3::new(
+                        -f32::sin(horizontal as f32),
+                        -f32::cos(horizontal as f32),
+                        0.0,
+                    ) * ray_distance),
+            );
+
+            match terrain
+                .ray(start, end)
+                .ignore_error()
+                .max_iter(raycast_resolution)
+                .until(|b| b.is_solid())
+                .cast()
+            {
+                (_, Ok(Some(_))) => {
+                    total += 1;
+                    hit += 1;
+                },
+                (_, Ok(None)) => total += 1,
+                (_, Err(_)) => total += 1,
+            }
+
+            if horizontal % vertical_resolution == 0 {
+                for vertical in 0..3 {
+                    let vertical_angle = (vertical as f32 * PI) / 6.0;
+                    let (vertical_start, vertical_end) = (
+                        self.focus,
+                        self.focus
+                            + (Vec3::new(
+                                -f32::sin(horizontal_angle) * f32::cos(vertical_angle),
+                                -f32::cos(horizontal_angle) * f32::cos(vertical_angle),
+                                f32::sin(vertical_angle),
+                            ) * ray_distance),
+                    );
+
+                    match terrain
+                        .ray(vertical_start, vertical_end)
+                        .ignore_error()
+                        .max_iter(raycast_resolution)
+                        .until(|b| b.is_solid())
+                        .cast()
+                    {
+                        (_, Ok(Some(_))) => {
+                            total += 1;
+                            hit += 1;
+                        },
+                        (_, Ok(None)) => total += 1,
+                        (_, Err(_)) => total += 1,
+                    }
+                }
+            }
+        }
+
+        let percentage = hit as f32 / total as f32;
+        self.enclosed = percentage >= 0.75;
+    }
+
+    /// Compute_dependents adjusted for when there is no terrain data (character
+    /// selection)
+    pub fn compute_dependents_no_terrain(&mut self) {
+        self.dependents.view_mat = Mat4::<f32>::identity()
+            * Mat4::translation_3d(-Vec3::unit_z() * self.dist)
+            * Mat4::rotation_z(self.ori.z)
+            * Mat4::rotation_x(self.ori.y)
+            * Mat4::rotation_y(self.ori.x)
+            * Mat4::rotation_3d(PI / 2.0, -Vec4::unit_x())
+            * Mat4::translation_3d(-self.focus);
+
+        self.dependents.proj_mat =
+            Mat4::perspective_rh_no(self.fov, self.aspect, NEAR_PLANE, FAR_PLANE);
+
+        // TODO: Make this more efficient.
+        self.dependents.cam_pos = Vec3::from(self.dependents.view_mat.inverted() * Vec4::unit_w());
+    }
+
     /// Compute the transformation matrices (view matrix and projection matrix)
     /// and position of the camera.
-    pub fn compute_dependents(&mut self, terrain: &impl ReadVol) {
+    pub fn compute_dependents(&mut self, terrain: &TerrainGrid) {
         span!(_guard, "compute_dependents", "Camera::compute_dependents");
+        // Check enclosure if necessary
+        let mut should_check_enclosure = false;
+        match self.enclosed_last_checked {
+            Some(vec) => {
+                // We don't need to check enclosure every frame. Only check if we have moved.
+                if vec.distance_squared(self.focus) >= 1.2 {
+                    should_check_enclosure = true;
+                    self.enclosed_last_checked = Some(self.focus);
+                }
+            },
+            None => {
+                should_check_enclosure = true;
+                self.enclosed_last_checked = Some(self.focus);
+            },
+        }
+
+        if should_check_enclosure {
+            self.check_enclosure(&*terrain);
+        }
+
         let dist = {
             let (start, end) = (self.focus - self.forward() * self.dist, self.focus);
 
+            if self.enclosed {
+                match terrain
+                    .ray(start, end)
+                    .ignore_error()
+                    .max_iter(500)
+                    .until(|vox| !vox.is_solid())
+                    .last_edge_cast()
+                {
+                    Ok(d) => {
+                        if d >= self.dist {
+                            self.dist
+                        } else {
+                            f32::min(self.dist - d - 0.1, self.dist)
+                        }
+                    },
+                    Err(_) => self.dist,
+                }
+            } else {
                 match terrain
                     .ray(start, end)
                     .ignore_error()
@@ -97,6 +239,7 @@ impl Camera {
                     (_, Err(_)) => self.dist,
                 }
                 .max(0.0)
+            }
         };
 
         self.dependents.view_mat = Mat4::<f32>::identity()

voxygen/src/scene/simple.rs

@@ -22,29 +22,10 @@ use common::{
     comp::{humanoid, item::ItemKind, Loadout},
     figure::Segment,
     terrain::BlockKind,
-    vol::{BaseVol, ReadVol, Vox},
 };
 use tracing::error;
 use vek::*;
 
-#[derive(PartialEq, Eq, Copy, Clone)]
-struct VoidVox;
-impl Vox for VoidVox {
-    fn empty() -> Self { VoidVox }
-
-    fn is_empty(&self) -> bool { true }
-
-    fn or(self, _other: Self) -> Self { VoidVox }
-}
-struct VoidVol;
-impl BaseVol for VoidVol {
-    type Error = ();
-    type Vox = VoidVox;
-}
-impl ReadVol for VoidVol {
-    fn get<'a>(&'a self, _pos: Vec3<i32>) -> Result<&'a Self::Vox, Self::Error> { Ok(&VoidVox) }
-}
-
 fn generate_mesh<'a>(
     greedy: &mut GreedyMesh<'a>,
     mesh: &mut Mesh<TerrainPipeline>,
@@ -234,7 +215,7 @@ impl Scene {
             scene_data.mouse_smoothing,
         );
 
-        self.camera.compute_dependents(&VoidVol);
+        self.camera.compute_dependents_no_terrain();
         let camera::Dependents {
             view_mat,
             proj_mat,