wip selection box

shaders/selection_box.frag

@@ -0,0 +1,8 @@
+#version 150 core
+
+out vec4 color;
+uniform vec4 u_color;
+
+void main() {
+  color = u_color;
+}

shaders/selection_box.vert

@@ -0,0 +1,10 @@
+#version 150 core
+
+in vec3 position;
+uniform vec3 u_position;
+uniform mat4 perspective;
+uniform mat4 view;
+
+void main() {
+  gl_Position = perspective * view * vec4(position + u_position, 1.);
+}

src/prefabs.rs

@@ -56,6 +56,9 @@ pub struct BlockTexturesPrefab(pub SrgbTexture2dArray);
 #[derive(Unique)]
 pub struct ChunkShaderPrefab(pub Program);
 
+#[derive(Unique)]
+pub struct SelBoxShaderPrefab(pub Program);
+
 pub fn load_prefabs(
   storages: AllStoragesView,
   renderer: NonSendSync<UniqueView<Renderer>>
@@ -74,4 +77,11 @@ pub fn load_prefabs(
       &renderer.display
     )
   ));
+  storages.add_unique_non_send_sync(SelBoxShaderPrefab(
+    include_shader_prefab!(
+      "../shaders/selection_box.vert",
+      "../shaders/selection_box.frag",
+      &renderer.display
+    )
+  ));
 }

src/rendering.rs

@@ -9,6 +9,7 @@ use glium::{
 };
 use glam::Vec3;
 
+pub mod primitives;
 pub mod world;
 pub mod selection_box;
 

src/rendering/primitives.rs

@@ -0,0 +1,32 @@
+const CUBE_VERTICES: &[f32] = &[
+  // front
+  -1.0, -1.0,  1.0,
+   1.0, -1.0,  1.0,
+   1.0,  1.0,  1.0,
+  -1.0,  1.0,  1.0,
+  // back
+  -1.0, -1.0, -1.0,
+   1.0, -1.0, -1.0,
+   1.0,  1.0, -1.0,
+  -1.0,  1.0, -1.0
+];
+const CUBE_INDICES: &[u16] = &[
+  // front
+  0, 1, 2,
+  2, 3, 0,
+  // right
+  1, 5, 6,
+  6, 2, 1,
+  // back
+  7, 6, 5,
+  5, 4, 7,
+  // left
+  4, 0, 3,
+  3, 7, 4,
+  // bottom
+  4, 5, 1,
+  1, 0, 4,
+  // top
+  3, 2, 6,
+  6, 7, 3
+];

src/rendering/selection_box.rs

@@ -1,12 +1,16 @@
 use shipyard::{View, IntoIter, NonSendSync, UniqueViewMut};
-use glium::Surface;
+use glium::{Surface, implement_vertex};
 use crate::{
   world::raycast::LookingAtBlock, 
   camera::Camera
 };
 use super::RenderTarget;
 
-const CUBE_VERTICES: &[f32] = &[0.0];
+#[derive(Clone, Copy)]
+pub struct SelBoxVertex {
+  pub position: [f32; 3],
+}
+implement_vertex!(SelBoxVertex, position);
 
 //wip
 pub fn render_selection_box(