feat(engine): make material textures optional

1 files changed, 37 insertions, 4 deletions

diff --git a/engine/src/material.rs b/engine/src/material.rs
index 6839fd1..69fe970 100644
--- a/engine/src/material.rs
+++ b/engine/src/material.rs
@@ -1,6 +1,7 @@
 use ecs::Component;
 
 use crate::color::Color;
+use crate::data_types::dimens::Dimens;
 use crate::texture::{Id as TextureId, Texture};
 
 #[derive(Debug, Clone, Component)]
@@ -167,15 +168,42 @@ impl Builder
     /// # Panics
     /// Will panic if no ambient map, diffuse map or specular map is set.
     #[must_use]
-    pub fn build(self) -> Material
+    pub fn build(mut self) -> Material
     {
+        let ambient_map = self.ambient_map.unwrap_or_else(|| {
+            let texture = create_1x1_white_texture();
+            let texture_id = texture.id();
+
+            self.textures.push(texture);
+
+            texture_id
+        });
+
+        let diffuse_map = self.diffuse_map.unwrap_or_else(|| {
+            let texture = create_1x1_white_texture();
+            let texture_id = texture.id();
+
+            self.textures.push(texture);
+
+            texture_id
+        });
+
+        let specular_map = self.specular_map.unwrap_or_else(|| {
+            let texture = create_1x1_white_texture();
+            let texture_id = texture.id();
+
+            self.textures.push(texture);
+
+            texture_id
+        });
+
         Material {
             ambient: self.ambient.clone(),
             diffuse: self.diffuse.clone(),
             specular: self.specular.clone(),
-            ambient_map: self.ambient_map.unwrap(),
-            diffuse_map: self.diffuse_map.unwrap(),
-            specular_map: self.specular_map.unwrap(),
+            ambient_map,
+            diffuse_map,
+            specular_map,
             textures: self.textures,
             shininess: self.shininess,
         }
@@ -189,3 +217,8 @@ impl Default for Builder
         Self::new()
     }
 }
+
+fn create_1x1_white_texture() -> Texture
+{
+    Texture::new_from_color(&Dimens { width: 1, height: 1 }, &Color::WHITE_U8)
+}