Added -s mtl option

assets/shaders/shader.vert

@@ -2,6 +2,7 @@
 
 uniform mat4 perspective;
 uniform mat4 view;
+uniform vec3 texture_size;
 
 in vec3 vertex;
 in vec2 tex_coords;
@@ -12,7 +13,7 @@ out vec3 v_normal;
 
 void main() {
     v_normal = normal;
-    v_tex_coords = tex_coords;
+    v_tex_coords = vec2(tex_coords.x * texture_size.x, tex_coords.y * texture_size.y);
 
     gl_Position = perspective * view * vec4(vertex, 1.0);
 }

src/model/material.rs

@@ -14,7 +14,7 @@ pub struct Material {
     pub diffuse: Vector3<f32>,
 
     /// Map linking each texture map to its file path.
-    pub textures: HashMap<String, String>,
+    pub textures: HashMap<String, (String, Vector3<f32>)>,
 
     /// Instructions that are unknown.
     ///

src/model/mod.rs

@@ -102,7 +102,7 @@ pub struct Model {
     pub materials: HashMap<String, Material>,
 
     /// Map associating the name of a texture and the real texture.
-    pub textures: HashMap<String, Rc<SrgbTexture2d>>,
+    pub textures: HashMap<String, (Rc<SrgbTexture2d>, Vector3<f32>)>,
 
     /// The list of parts of the model.
     pub parts: Vec<Part>,
@@ -544,15 +544,15 @@ impl Model {
 
     /// Builds the SrgbTextures for rendering.
     pub fn build_texture_for_material(&mut self, material: &Material, renderer: &Renderer) {
-        if let Some(path) = material.textures.get("map_Kd") {
+        if let Some((path, size)) = material.textures.get("map_Kd") {
             let texture = renderer.make_texture(path);
             // Don't need to insert multiple times the same texture
-            self.textures.entry(path.to_owned()).or_insert(Rc::new(texture));
+            self.textures.entry(path.to_owned()).or_insert((Rc::new(texture), *size));
         };
     }
 
     /// Returns the rendering texture.
-    pub fn get_texture_by_name(&self, name: &str) -> Option<&Rc<SrgbTexture2d>> {
+    pub fn get_texture_by_name(&self, name: &str) -> Option<&(Rc<SrgbTexture2d>, Vector3<f32>)> {
         self.textures.get(name)
     }
 
@@ -562,7 +562,7 @@ impl Model {
     }
 
     /// Returns a ref mut to the table of textures.
-    pub fn textures_mut(&mut self) -> &mut HashMap<String, Rc<SrgbTexture2d>> {
+    pub fn textures_mut(&mut self) -> &mut HashMap<String, (Rc<SrgbTexture2d>, Vector3<f32>)> {
         &mut self.textures
     }
 }

src/parser/mod.rs

@@ -46,7 +46,8 @@ pub enum Element {
     ///
     /// First string is the name of the map.
     /// Second string is the path to the image file.
-    Texture(String, String),
+    /// Vector3 is the size of the texture.
+    Texture(String, String, Vector3<f32>),
 
     /// Change the main color of the current material.
     Diffuse(Vector3<f32>),
@@ -107,6 +108,12 @@ pub enum ParserError {
     /// usize is the line.
     NoMaterialExist(String, usize),
 
+    /// No path after a map
+    NoPathAfterMap(String, usize),
+
+    /// Unexpected token
+    UnexpectedToken(String, usize, String),
+
     /// Something weird happened
     OtherError(String),
 }
@@ -175,6 +182,10 @@ impl fmt::Display for ParserError {
                 write!(f, "Redecralation of material in {}:{}:\n\t{} already exists", p, n, l),
             ParserError::NoMaterialExist(ref p, l) =>
                 write!(f, "Missing material in {}:{}\n\tNo material were defined, can't set attribute", p, l),
+            ParserError::NoPathAfterMap(ref p, l) =>
+                write!(f, "Missing path for map in {}:{}", p, l),
+            ParserError::UnexpectedToken(ref p, l, ref t) =>
+                write!(f, "Unexpected token {} in {}:{}", t, p, l),
             ParserError::OtherError(ref p) =>
                 write!(f, "Something weird happened in {}...", p),
         }
@@ -265,7 +276,7 @@ impl<LP: LineParser> Parser for LP {
                     }
                 },
 
-                Element::Texture(texture_name, texture_path) => {
+                Element::Texture(texture_name, texture_path, size) => {
                     if current_material_name.is_none() {
                         return Err(ParserError::NoMaterialExist(path.to_owned(), num));
                     }
@@ -279,7 +290,7 @@ impl<LP: LineParser> Parser for LP {
                     }
 
                     let current_material = current_material.unwrap();
-                    current_material.textures.insert(texture_name, texture_path);
+                    current_material.textures.insert(texture_name, (texture_path, size));
                 },
 
                 Element::Diffuse(v) => {

src/parser/mtl.rs

@@ -54,9 +54,25 @@ impl LineParser for MtlParser {
 
                 map if map.starts_with("map_") => {
 
+                    let split = split.collect::<Vec<_>>();
+                    if split.len() == 0 {
+                        Err(ParserError::NoPathAfterMap(path.to_owned(), line_number))
+                    } else if split.len() == 1 {
                         let mut full_path = root.clone();
-                    full_path.push(split.nth(0).unwrap().to_owned());
-                    Ok(Element::Texture(first.to_owned(), full_path.to_str().unwrap().to_owned()))
+                        full_path.push(split[0].to_owned());
+                        Ok(Element::Texture(first.to_owned(), full_path.to_str().unwrap().to_owned(), Vector3::new(1.0, 1.0, 1.0)))
+                    } else if split[0] == "-s" {
+                        let size = Vector3::new(
+                            if let Ok(f) = split[1].parse::<f32>() { f } else { return Err(ParserError::ParseNumberError(path.to_owned(), line_number, split[1].to_owned())); },
+                            if let Ok(f) = split[2].parse::<f32>() { f } else { return Err(ParserError::ParseNumberError(path.to_owned(), line_number, split[2].to_owned())); },
+                            if let Ok(f) = split[3].parse::<f32>() { f } else { return Err(ParserError::ParseNumberError(path.to_owned(), line_number, split[3].to_owned())); },
+                        );
+                        let mut full_path = root.clone();
+                        full_path.push(split[4].to_owned());
+                        Ok(Element::Texture(first.to_owned(), full_path.to_str().unwrap().to_owned(), size))
+                    } else {
+                        Err(ParserError::UnexpectedKeyword(path.to_owned(), line_number, split[2].to_owned()))
+                    }
 
                 },
 

src/renderer.rs

@@ -151,10 +151,10 @@ impl Renderer {
 
                     let texture = self.get_texture_of_part(&model, part);
 
-                    let texture = if let Some(texture) = texture {
-                        texture
+                    let (texture, size) = if let Some((texture, size)) = texture {
+                        (texture, size)
                     } else {
-                        &self.default_texture
+                        (&self.default_texture, Vector3::new(1.0, 1.0, 1.0))
                     };
 
                     target.draw(
@@ -166,6 +166,7 @@ impl Renderer {
                             tex: texture,
                             perspective: Into::<[[f32; 4]; 4]>::into(perspective),
                             view: Into::<[[f32; 4]; 4]>::into(view),
+                            texture_size: Into::<[f32; 3]>::into(size),
                         ),
                             &params,
                         ).unwrap();
@@ -177,12 +178,12 @@ impl Renderer {
     }
 
     /// Renders a part of a model.
-    fn get_texture_of_part<'a>(&self, model: &'a Model, part: &Part) -> Option<&'a SrgbTexture2d> {
+    fn get_texture_of_part<'a>(&self, model: &'a Model, part: &Part) -> Option<(&'a SrgbTexture2d, Vector3<f32>)> {
         if let Some(ref material_name) = part.material_name {
             if let Some(ref material) = model.materials.get(material_name) {
-                if let Some(texture) = material.textures.get("map_Kd") {
-                    if let Some(ref texture) = model.get_texture_by_name(&texture) {
-                        Some(texture)
+                if let Some((texture, _)) = material.textures.get("map_Kd") {
+                    if let Some((texture, size)) = model.get_texture_by_name(texture) {
+                        Some((texture, *size))
                     } else {
                         None
                     }