Added terrain sprite LoD

common/src/figure/mod.rs

@@ -2,7 +2,7 @@ pub mod cell;
 pub mod mat_cell;
 pub use mat_cell::Material;
 
-use self::{cell::Cell, mat_cell::MatCell};
+pub use self::{cell::Cell, mat_cell::MatCell};
 use crate::{
     vol::{IntoFullPosIterator, IntoFullVolIterator, ReadVol, SizedVol, Vox, WriteVol},
     volumes::dyna::Dyna,

common/src/vol.rs

@@ -1,4 +1,4 @@
-use crate::ray::Ray;
+use crate::{ray::Ray, volumes::scaled::Scaled};
 use std::fmt::Debug;
 use vek::*;
 
@@ -24,6 +24,13 @@ pub trait Vox: Sized + Clone + PartialEq {
 pub trait BaseVol {
     type Vox: Vox;
     type Error: Debug;
+
+    fn scaled_by(&self, scale: Vec3<f32>) -> Scaled<Self>
+    where
+        Self: Sized,
+    {
+        Scaled { inner: self, scale }
+    }
 }
 
 /// Implementing `BaseVol` for any `&'a BaseVol` makes it possible to implement
@@ -159,6 +166,7 @@ where
 /// Unfortunately we can't just implement `IntoIterator` in this generic way
 /// because it's defined in another crate. That's actually the only reason why
 /// the trait `IntoFullVolIterator` exists.
+// TODO: See whether relaxed orphan rules permit this to be replaced now
 impl<'a, T: 'a + SizedVol> IntoFullVolIterator<'a> for &'a T
 where
     Self: IntoVolIterator<'a>,

common/src/volumes/mod.rs

@@ -1,4 +1,5 @@
 pub mod chunk;
 pub mod dyna;
+pub mod scaled;
 pub mod vol_grid_2d;
 pub mod vol_grid_3d;

common/src/volumes/scaled.rs

@@ -0,0 +1,47 @@
+use crate::vol::{BaseVol, ReadVol, SizedVol, Vox};
+use vek::*;
+
+pub struct Scaled<'a, V> {
+    pub inner: &'a V,
+    pub scale: Vec3<f32>,
+}
+
+impl<'a, V: BaseVol> BaseVol for Scaled<'a, V> {
+    type Error = V::Error;
+    type Vox = V::Vox;
+}
+
+impl<'a, V: ReadVol> ReadVol for Scaled<'a, V> {
+    #[inline(always)]
+    fn get(&self, pos: Vec3<i32>) -> Result<&Self::Vox, Self::Error> {
+        let pos = pos.map2(self.scale, |e, scale| (e as f32 / scale).trunc() as i32);
+        let search_size = (Vec3::one() / self.scale).map(|e: f32| e.ceil() as i32);
+        (-search_size.x / 2..search_size.x / 2)
+            .map(|i| {
+                (-search_size.y / 2..search_size.y / 2).map(move |j| {
+                    (-search_size.z / 2..search_size.z / 2).map(move |k| Vec3::new(i, j, k))
+                })
+            })
+            .flatten()
+            .flatten()
+            .map(|offs| self.inner.get(pos + offs))
+            .find(|vox| vox.as_ref().map(|v| !v.is_empty()).unwrap_or(false))
+            .unwrap_or_else(|| self.inner.get(pos))
+    }
+}
+
+impl<'a, V: SizedVol> SizedVol for Scaled<'a, V> {
+    #[inline(always)]
+    fn lower_bound(&self) -> Vec3<i32> {
+        self.inner
+            .lower_bound()
+            .map2(self.scale, |e, scale| (e as f32 * scale).floor() as i32)
+    }
+
+    #[inline(always)]
+    fn upper_bound(&self) -> Vec3<i32> {
+        self.inner
+            .upper_bound()
+            .map2(self.scale, |e, scale| (e as f32 * scale).floor() as i32)
+    }
+}

voxygen/src/mesh/mod.rs

@@ -4,14 +4,14 @@ mod vol;
 
 use crate::render::{self, Mesh};
 
-pub trait Meshable<P: render::Pipeline, T: render::Pipeline> {
+pub trait Meshable<'a, P: render::Pipeline, T: render::Pipeline> {
     type Pipeline: render::Pipeline;
     type TranslucentPipeline: render::Pipeline;
     type Supplement;
 
     // Generate meshes - one opaque, one translucent
     fn generate_mesh(
-        &self,
+        &'a self,
         supp: Self::Supplement,
     ) -> (Mesh<Self::Pipeline>, Mesh<Self::TranslucentPipeline>);
 }

voxygen/src/mesh/segment.rs

@@ -3,27 +3,43 @@ use crate::{
     render::{self, FigurePipeline, Mesh, SpritePipeline},
 };
 use common::{
-    figure::Segment,
+    figure::Cell,
     util::{linear_to_srgb, srgb_to_linear},
-    vol::{IntoFullVolIterator, ReadVol, Vox},
+    vol::{BaseVol, ReadVol, SizedVol, Vox},
 };
 use vek::*;
 
 type FigureVertex = <FigurePipeline as render::Pipeline>::Vertex;
 type SpriteVertex = <SpritePipeline as render::Pipeline>::Vertex;
 
-impl Meshable<FigurePipeline, FigurePipeline> for Segment {
+impl<'a, V: 'a> Meshable<'a, FigurePipeline, FigurePipeline> for V
+where
+    V: BaseVol<Vox = Cell> + ReadVol + SizedVol,
+    /* TODO: Use VolIterator instead of manually iterating
+     * &'a V: IntoVolIterator<'a> + IntoFullVolIterator<'a>,
+     * &'a V: BaseVol<Vox=Cell>, */
+{
     type Pipeline = FigurePipeline;
-    type Supplement = Vec3<f32>;
+    type Supplement = (Vec3<f32>, Vec3<f32>);
     type TranslucentPipeline = FigurePipeline;
 
     fn generate_mesh(
-        &self,
-        offs: Self::Supplement,
+        &'a self,
+        (offs, scale): Self::Supplement,
     ) -> (Mesh<Self::Pipeline>, Mesh<Self::TranslucentPipeline>) {
         let mut mesh = Mesh::new();
 
-        for (pos, vox) in self.full_vol_iter() {
+        let vol_iter = (self.lower_bound().x..self.upper_bound().x)
+            .map(|i| {
+                (self.lower_bound().y..self.upper_bound().y).map(move |j| {
+                    (self.lower_bound().z..self.upper_bound().z).map(move |k| Vec3::new(i, j, k))
+                })
+            })
+            .flatten()
+            .flatten()
+            .map(|pos| (pos, self.get(pos).unwrap()));
+
+        for (pos, vox) in vol_iter {
             if let Some(col) = vox.get_color() {
                 vol::push_vox_verts(
                     &mut mesh,
@@ -32,7 +48,7 @@ impl Meshable<FigurePipeline, FigurePipeline> for Segment {
                     &[[[Rgba::from_opaque(col); 3]; 3]; 3],
                     |origin, norm, col, light, ao| {
                         FigureVertex::new(
-                            origin,
+                            origin * scale,
                             norm,
                             linear_to_srgb(srgb_to_linear(col) * light),
                             ao,
@@ -62,18 +78,34 @@ impl Meshable<FigurePipeline, FigurePipeline> for Segment {
     }
 }
 
-impl Meshable<SpritePipeline, SpritePipeline> for Segment {
+impl<'a, V: 'a> Meshable<'a, SpritePipeline, SpritePipeline> for V
+where
+    V: BaseVol<Vox = Cell> + ReadVol + SizedVol,
+    /* TODO: Use VolIterator instead of manually iterating
+     * &'a V: IntoVolIterator<'a> + IntoFullVolIterator<'a>,
+     * &'a V: BaseVol<Vox=Cell>, */
+{
     type Pipeline = SpritePipeline;
-    type Supplement = Vec3<f32>;
+    type Supplement = (Vec3<f32>, Vec3<f32>);
     type TranslucentPipeline = SpritePipeline;
 
     fn generate_mesh(
-        &self,
-        offs: Self::Supplement,
+        &'a self,
+        (offs, scale): Self::Supplement,
     ) -> (Mesh<Self::Pipeline>, Mesh<Self::TranslucentPipeline>) {
         let mut mesh = Mesh::new();
 
-        for (pos, vox) in self.full_vol_iter() {
+        let vol_iter = (self.lower_bound().x..self.upper_bound().x)
+            .map(|i| {
+                (self.lower_bound().y..self.upper_bound().y).map(move |j| {
+                    (self.lower_bound().z..self.upper_bound().z).map(move |k| Vec3::new(i, j, k))
+                })
+            })
+            .flatten()
+            .flatten()
+            .map(|pos| (pos, self.get(pos).unwrap()));
+
+        for (pos, vox) in vol_iter {
             if let Some(col) = vox.get_color() {
                 vol::push_vox_verts(
                     &mut mesh,
@@ -82,7 +114,7 @@ impl Meshable<SpritePipeline, SpritePipeline> for Segment {
                     &[[[Rgba::from_opaque(col); 3]; 3]; 3],
                     |origin, norm, col, light, ao| {
                         SpriteVertex::new(
-                            origin,
+                            origin * scale,
                             norm,
                             linear_to_srgb(srgb_to_linear(col) * light),
                             ao,

voxygen/src/mesh/terrain.rs

@@ -198,15 +198,15 @@ fn calc_light<V: RectRasterableVol<Vox = Block> + ReadVol + Debug>(
     }
 }
 
-impl<V: RectRasterableVol<Vox = Block> + ReadVol + Debug> Meshable<TerrainPipeline, FluidPipeline>
-    for VolGrid2d<V>
+impl<'a, V: RectRasterableVol<Vox = Block> + ReadVol + Debug>
+    Meshable<'a, TerrainPipeline, FluidPipeline> for VolGrid2d<V>
 {
     type Pipeline = TerrainPipeline;
     type Supplement = Aabb<i32>;
     type TranslucentPipeline = FluidPipeline;
 
     fn generate_mesh(
-        &self,
+        &'a self,
         range: Self::Supplement,
     ) -> (Mesh<Self::Pipeline>, Mesh<Self::TranslucentPipeline>) {
         let mut light = calc_light(range, self);

voxygen/src/scene/figure/load.rs

@@ -55,7 +55,7 @@ fn graceful_load_mat_segment_flipped(mesh_name: &str) -> MatSegment {
 }
 
 fn generate_mesh(segment: &Segment, offset: Vec3<f32>) -> Mesh<FigurePipeline> {
-    Meshable::<FigurePipeline, FigurePipeline>::generate_mesh(segment, offset).0
+    Meshable::<FigurePipeline, FigurePipeline>::generate_mesh(segment, (offset, Vec3::one())).0
 }
 
 pub fn load_mesh(mesh_name: &str, position: Vec3<f32>) -> Mesh<FigurePipeline> {