add overlay when submerged

kubi-shared/src/block.rs

@@ -1,3 +1,4 @@
+use glam::{vec4, Vec4};
 use serde::{Serialize, Deserialize};
 use strum::EnumIter;
 use num_enum::TryFromPrimitive;
@@ -53,6 +54,7 @@ impl Block {
         collision: CollisionType::None,
         raycast_collision: false,
         drops: None,
+        submerge: None,
       },
       Self::Marker => BlockDescriptor {
         name: "marker",
@@ -60,6 +62,7 @@ impl Block {
         collision: CollisionType::None,
         raycast_collision: false,
         drops: None,
+        submerge: None,
       },
       Self::Stone => BlockDescriptor {
         name: "stone",
@@ -70,6 +73,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Dirt => BlockDescriptor {
         name: "dirt",
@@ -80,6 +84,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Grass => BlockDescriptor {
         name: "grass",
@@ -94,6 +99,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Sand => BlockDescriptor {
         name: "sand",
@@ -104,6 +110,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Cobblestone => BlockDescriptor {
         name: "cobblestone",
@@ -114,6 +121,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::TallGrass => BlockDescriptor {
         name: "tall grass",
@@ -121,6 +129,7 @@ impl Block {
         collision: CollisionType::None,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Planks => BlockDescriptor {
         name: "planks",
@@ -131,6 +140,7 @@ impl Block {
         collision: CollisionType::Solid, 
         raycast_collision: true, 
         drops: None,
+        submerge: None,
       },
       Self::Torch => BlockDescriptor {
         name: "torch",
@@ -138,6 +148,7 @@ impl Block {
         collision: CollisionType::None,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Wood => BlockDescriptor {
         name: "leaf",
@@ -148,6 +159,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Leaf => BlockDescriptor {
         name: "leaf",
@@ -158,6 +170,7 @@ impl Block {
         collision: CollisionType::Solid,
         raycast_collision: true,
         drops: None,
+        submerge: None,
       },
       Self::Water => BlockDescriptor {
         name: "water",
@@ -168,6 +181,7 @@ impl Block {
         collision: CollisionType::None,
         raycast_collision: true,
         drops: None,
+        submerge: Some(vec4(0., 0., 0.25, 0.75)),
       },
     }
   }
@@ -180,6 +194,7 @@ pub struct BlockDescriptor {
   pub collision: CollisionType,
   pub raycast_collision: bool,
   pub drops: Option<Item>,
+  pub submerge: Option<Vec4>,
 }
 
 #[derive(Clone, Copy, Debug)]

kubi/shaders/colored2.frag

@@ -0,0 +1,10 @@
+#version 300 es
+
+precision highp float;
+
+out vec4 out_color;
+uniform vec4 color;
+
+void main() {
+  out_color = color;
+}

kubi/shaders/colored2.vert

@@ -0,0 +1,9 @@
+#version 300 es
+
+precision highp float;
+
+in vec2 position;
+
+void main() {
+  gl_Position = vec4(position, 0.0, 1.0);
+}

kubi/src/lib.rs

@@ -76,6 +76,7 @@ use rendering::{
   world::{draw_world, draw_current_chunk_border},
   selection_box::render_selection_box,
   entities::render_entities, 
+  sumberge::render_submerged_view,
 };
 use block_placement::update_block_placement;
 use delta_time::{DeltaTime, init_delta_time};
@@ -178,6 +179,7 @@ fn render() -> Workload {
       draw_current_chunk_border,
       render_selection_box,
       render_entities,
+      render_submerged_view,
     ).into_sequential_workload().run_if(is_ingame),
     kubi_ui_draw,
   ).into_sequential_workload()

kubi/src/prefabs.rs

@@ -51,6 +51,10 @@ pub struct ChunkShaderPrefab(pub Program);
 #[repr(transparent)]
 pub struct ColoredShaderPrefab(pub Program);
 
+#[derive(Unique)]
+#[repr(transparent)]
+pub struct Colored2ShaderPrefab(pub Program);
+
 #[derive(Unique)]
 #[repr(transparent)]
 pub struct UiFontPrefab(pub FontHandle);
@@ -98,6 +102,14 @@ pub fn load_prefabs(
       &renderer.display
     )
   ));
+  storages.add_unique_non_send_sync(Colored2ShaderPrefab(
+    include_shader_prefab!(
+      "colored",
+      "../shaders/colored2.vert",
+      "../shaders/colored2.frag",
+      &renderer.display
+    )
+  ));
 
   log::info!("releasing shader compiler");
 

kubi/src/rendering.rs

@@ -22,6 +22,7 @@ pub mod primitives;
 pub mod world;
 pub mod selection_box;
 pub mod entities;
+pub mod sumberge;
 
 #[derive(Unique)]
 #[repr(transparent)]

kubi/src/rendering/primitives.rs

@@ -3,9 +3,11 @@ use glium::implement_vertex;
 
 pub mod cube;
 pub mod rect;
+pub mod stri;
 
 use cube::init_cube_primitive;
 use rect::init_rect_primitive;
+use stri::init_stri_primitive;
 
 #[derive(Clone, Copy, Default)]
 pub struct PositionOnlyVertex {
@@ -23,5 +25,6 @@ pub fn init_primitives() -> Workload {
   (
     init_cube_primitive,
     init_rect_primitive,
-  ).into_sequential_workload()
+    init_stri_primitive,
+  ).into_workload()
 }

kubi/src/rendering/primitives/stri.rs

@@ -0,0 +1,30 @@
+use shipyard::{Unique, AllStoragesView, NonSendSync, UniqueView};
+use glium::{VertexBuffer, IndexBuffer, index::PrimitiveType};
+use crate::rendering::Renderer;
+use super::PositionOnlyVertex2d;
+
+#[derive(Unique)]
+pub struct STriPrimitive(pub VertexBuffer<PositionOnlyVertex2d>, pub IndexBuffer<u16>);
+
+const STRI_VERTEX: &[PositionOnlyVertex2d] = &[
+  PositionOnlyVertex2d { position: [-1., -1.] },
+  PositionOnlyVertex2d { position: [ 3., -1.] },
+  PositionOnlyVertex2d { position: [-1.,  3.] },
+];
+const STRI_INDEX: &[u16] = &[0, 1, 2];
+
+pub(super) fn init_stri_primitive(
+  storages: AllStoragesView,
+  display: NonSendSync<UniqueView<Renderer>>
+) {
+  let vert = VertexBuffer::immutable(
+    &display.display,
+    STRI_VERTEX
+  ).unwrap();
+  let index = IndexBuffer::immutable(
+    &display.display,
+    PrimitiveType::TrianglesList,
+    STRI_INDEX
+  ).unwrap();
+  storages.add_unique_non_send_sync(STriPrimitive(vert, index));
+}

kubi/src/rendering/sumberge.rs

@@ -0,0 +1,39 @@
+use glium::{uniform, Blend, DrawParameters, Surface};
+use kubi_shared::transform::Transform;
+use shipyard::{IntoIter, NonSendSync, UniqueView, UniqueViewMut, View};
+use crate::{
+  player::MainPlayer,
+  prefabs::Colored2ShaderPrefab,
+  rendering::primitives::stri::STriPrimitive,
+  world::ChunkStorage,
+};
+use super::RenderTarget;
+
+pub fn render_submerged_view(
+  mut target: NonSendSync<UniqueViewMut<RenderTarget>>,
+  primitive: NonSendSync<UniqueView<STriPrimitive>>,
+  program: NonSendSync<UniqueView<Colored2ShaderPrefab>>,
+  plr: View<MainPlayer>,
+  trans: View<Transform>,
+  world: UniqueView<ChunkStorage>,
+) {
+  let (_, plr_trans) = (&plr, &trans).iter().next().expect("Main player MIA");
+  let plr_pos = plr_trans.0.to_scale_rotation_translation().2;
+  let block_at_pos = world.get_block(plr_pos.floor().as_ivec3());
+  let Some(block_at_pos) = block_at_pos  else { return };
+  let Some(color) = block_at_pos.descriptor().submerge else { return };
+
+  let draw_parameters = DrawParameters {
+    blend: Blend::alpha_blending(),
+    ..Default::default()
+  };
+  target.0.draw(
+    &primitive.0,
+    &primitive.1,
+    &program.0,
+    &uniform! {
+      color: color.to_array(),
+    },
+    &draw_parameters,
+  ).unwrap();
+}