Added color render

assets/shaders/color.frag

@@ -0,0 +1,15 @@
+#version 140
+
+uniform sampler2D tex;
+uniform vec3 diffuse;
+
+in vec3 v_color;
+
+out vec4 color;
+
+void main() {
+
+    color = vec4(v_color, 1.0);
+
+}
+

assets/shaders/color.vert

@@ -0,0 +1,17 @@
+#version 140
+
+uniform mat4 perspective;
+uniform mat4 view;
+uniform vec3 texture_size;
+
+in vec3 vertex;
+in vec2 tex_coords;
+in vec3 normal;
+in vec3 face_color;
+
+out vec3 v_color;
+
+void main() {
+    v_color = face_color;
+    gl_Position = perspective * view * vec4(vertex, 1.0);
+}

src/model/face_vertex.rs

@@ -1,49 +0,0 @@
-//! This module contains the FaceVertex struct.
-
-use std::fmt;
-
-#[derive(Copy, Clone, PartialEq)]
-/// The indices needed for each vertex of a face.
-pub struct FaceVertex {
-
-    /// The index of the vertex.
-    pub vertex: usize,
-
-    /// The index of the texture coordinate, None if there is no texture coordinate.
-    pub texture_coordinate: Option<usize>,
-
-    /// The index of the normal, None if there is no normal.
-    pub normal: Option<usize>,
-}
-
-impl FaceVertex {
-
-    /// Creates a new face vertex from its attributes.
-    pub fn new(vertex: usize, texture_coordinate: Option<usize>, normal: Option<usize>) -> FaceVertex {
-        FaceVertex {
-            vertex: vertex,
-            texture_coordinate: texture_coordinate,
-            normal: normal,
-        }
-    }
-
-}
-
-impl fmt::Debug for FaceVertex {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-
-        let texture_coordinate = if let Some(tc) = self.texture_coordinate {
-            tc.to_string()
-        } else {
-            "".to_owned()
-        };
-
-        let normal = if let Some(n) = self.normal {
-            n.to_string()
-        } else {
-            "".to_owned()
-        };
-
-        write!(formatter, "{}/{}/{}", self.vertex, texture_coordinate, normal)
-    }
-}

src/model/mod.rs

@@ -26,9 +26,10 @@ pub struct Vertex {
     vertex:     [f64; 3],
     tex_coords: [f64; 2],
     normal:     [f64; 3],
+    face_color: [f64; 3],
 }
 
-implement_vertex!(Vertex, vertex, tex_coords, normal);
+implement_vertex!(Vertex, vertex, tex_coords, normal, face_color);
 
 /// A part of a 3D model.
 ///
@@ -523,10 +524,26 @@ impl Model {
                     [0.0, 0.0, 0.0]
                 };
 
+                let [r, g, b] = if let Some(id) = face.id {
+                    let b = (id % 256) as u8;
+                    let g = ((id - b as usize) / 256 % 256) as u8;
+                    let r = ((id - g as usize * 256 - b as usize) / (256 * 256)) as u8;
+                    [r, g, b]
+                } else {
+                    [255, 255, 255]
+                };
+
+                let [r, g, b] = [
+                    r as f64 / 255.0,
+                    g as f64 / 255.0,
+                    b as f64 / 255.0,
+                ];
+
                 vertex_buffer.push(Vertex {
                     vertex:     vertex,
                     tex_coords: tex_coord,
                     normal:     normal,
+                    face_color: [r, g, b],
                 });
             }
         }
@@ -567,4 +584,9 @@ impl Model {
     pub fn textures_mut(&mut self) -> &mut HashMap<String, Rc<SrgbTexture2d>> {
         &mut self.textures
     }
+
+    /// Clears the OpenGL textures.
+    pub fn clear_textures(&mut self) {
+        self.textures = HashMap::new();
+    }
 }

src/renderer.rs

@@ -56,17 +56,52 @@ pub struct Renderer {
 }
 
 impl Renderer {
+
+    /// Creates the program with the default shader.
+    pub fn default_shader(display: &Display) -> Program {
+        Program::from_source(
+            display,
+            include_str!("../assets/shaders/default.vert"),
+            include_str!("../assets/shaders/default.frag"),
+            None
+        ).unwrap()
+    }
+
+    /// Creates the shader with one color per face.
+    pub fn color_shader(display: &Display) -> Program {
+        Program::from_source(
+            display,
+            include_str!("../assets/shaders/color.vert"),
+            include_str!("../assets/shaders/color.frag"),
+            None
+        ).unwrap()
+    }
+
     /// Creates a new renderer from a display.
     ///
     /// Is uses the default shaders and creates an empty vec of models.
     pub fn new(display: Display) -> Renderer {
 
-        let program = Program::from_source(
-            &display,
-            include_str!("../assets/shaders/shader.vert"),
-            include_str!("../assets/shaders/shader.frag"),
-            None
-        ).unwrap();
+        let program = Renderer::default_shader(&display);
+        Renderer::from_display_and_program(display, program)
+
+    }
+
+    /// Creates a new colored renderer from a display.
+    ///
+    /// Is uses the face colors shaders and creates an empty vec of models.
+    pub fn color(display: Display) -> Renderer {
+
+        let program = Renderer::color_shader(&display);
+        Renderer::from_display_and_program(display, program)
+
+    }
+
+
+    /// Creates a new renderer from a program.
+    ///
+    /// It allows you to use a custom shader.
+    pub fn from_display_and_program(display: Display, program: Program) -> Renderer {
 
         let image = RawImage2d::from_raw_rgba(vec![1.0, 1.0, 1.0, 1.0], (1, 1));
         let texture = SrgbTexture2d::new(&display, image).ok().unwrap();