Ready to use an uniform array of textures for the biomes

src/main.rs

@@ -1,13 +1,20 @@
 #[macro_use]
 extern crate glium;
 
+#[macro_use]
+extern crate load_file;
+
 use std::io::Cursor;
+use glium::texture::SrgbTexture2d;
 
 #[allow(unused_imports)]
 use glium::{glutin, Surface};
 
 mod support;
 
+const BIOMES_NUMBER: usize = 19;
+const BIOMES: [&str; BIOMES_NUMBER] = ["dirt", "grassDry", "grassGreen", "concrete", "soil", "beach", "seabed", "thorn", "wildField", "rock", "grassWild", "stony", "forestPine", "mud", "stonyThistle", "marsh", "dead", "desert", "weed"];
+
 fn main() {
     // building the display, ie. the main object
     let event_loop = glutin::event_loop::EventLoop::new();
@@ -18,16 +25,21 @@ fn main() {
     // building the vertex and index buffers
     let vertex_buffer = support::load_ground(&display);
 
-    let image = image::load(
-        Cursor::new(&include_bytes!("../grassGreen.jpg")),
-        image::ImageFormat::Jpeg,
-    )
-    .unwrap()
-    .to_rgba8();
-    let image_dimensions = image.dimensions();
-    let image =
-        glium::texture::RawImage2d::from_raw_rgba_reversed(&image.into_raw(), image_dimensions);
-    let texture = glium::texture::SrgbTexture2d::new(&display, image).unwrap();
+    let textures: [SrgbTexture2d; BIOMES_NUMBER] = BIOMES.map(|biome| {
+        println!("{}", biome);
+        let image = image::load(
+            Cursor::new(&load_bytes!(
+                &format!("../Extensions/LemnosLife/Assets/Pictures/Map/Ground/{}.jpg", biome)
+            )),
+            image::ImageFormat::Jpeg,
+        )
+            .unwrap()
+            .to_rgba8();
+        let image_dimensions = image.dimensions();
+        let image =
+            glium::texture::RawImage2d::from_raw_rgba_reversed(&image.into_raw(), image_dimensions);
+        glium::texture::SrgbTexture2d::new(&display, image).unwrap()
+    });
 
     // the program
     let program = program!(&display,
@@ -38,15 +50,19 @@ fn main() {
                 uniform mat4 persp_matrix;
                 uniform mat4 view_matrix;
 
+                // can't skip directly to fragment shader an unmodified variable?
                 in vec3 normal;
                 in uint index;
                 in float altitude;
+                in uint biome;
 
                 out vec3 v_normal;
                 out vec2 v_tex_coords;
+                out uint v_biome;
 
                 void main() {
                     v_normal = normal;
+                    v_biome = biome;
                     uint index_mod = index % 6u;
                     uint index_div = index / 6u;
                     uint z = index_div / 250u;
@@ -79,7 +95,9 @@ fn main() {
                 in vec3 v_normal;
                 in vec2 v_tex_coords;
                 out vec4 f_color;
+                in uint v_biome;
 
+                // TODO: not hardcode
                 uniform sampler2D tex;
 
                 const vec3 LIGHT = vec3(0.0, -1.0, 0.0);
@@ -103,7 +121,7 @@ fn main() {
         let uniforms = uniform! {
             persp_matrix: camera.get_perspective(),
             view_matrix: camera.get_view(),
-            tex: &texture,
+            tex: &textures[0] // could inline otherwise
         };
 
         // draw parameters