Add new Center enum for center config

src/main.rs

@@ -56,7 +56,7 @@ impl Application<ExampleState> for ExampleApp {
     fn init(canvas: &mut Canvas) -> Result<ExampleState, &'static str> {
         use canvas::{
             utils::Size,
-            sprite::Sprite,
+            sprite::{Sprite, Center},
         };
 
         //// 20 x 20 sprite of a picture
@@ -64,7 +64,7 @@ impl Application<ExampleState> for ExampleApp {
             .unwrap();
         let mut tex_sprite = canvas.create_texture_sprite(Size {w: 1280, h: 720});
         tex_sprite.set_texture(texture.clone(), Some(Position {x: 0, y: 0}), 1.0);
-        tex_sprite.set_center(Position {x:-1280/2, y:-720/2});
+        tex_sprite.set_center(Center::BotLeft);
         tex_sprite.set_position(Position {x: 0, y: 0});
 
         let mut sub_sprite = canvas.create_texture_sprite(Size {w: 100, h: 100});
@@ -74,12 +74,12 @@ impl Application<ExampleState> for ExampleApp {
 
         let mut sub_sprite2 = canvas.create_texture_sprite(Size {w: 200, h: 200});
         sub_sprite2.set_texture(texture.clone(), Some(Position {x: 100, y: 0}), 1.0);
-        sub_sprite2.set_center(Position {x:100, y:100});
+        sub_sprite2.set_center(Center::Custom(Position {x:100, y:100}));
         sub_sprite2.set_rotation(0.0);
         sub_sprite2.set_position(Position {x: 100, y: 100});
 
         let mut txt_sprite = canvas.create_text_sprite("00", Size {w: 100, h: 100}, 22.0);
-        txt_sprite.set_center(Position {x:-50, y:50});
+        txt_sprite.set_center(Center::BotLeft);
         txt_sprite.set_position(Position {x:100, y:100});
         txt_sprite.set_scale(1.0);
 

src/sprite.rs

@@ -19,6 +19,16 @@ use crate::{
 
 //--External imports--------------------------------------------------------------------------------
 
+//--Center enum-------------------------------------------------------------------------------------
+pub enum Center {
+	Geometric,
+	TopLeft,
+	TopRight,
+	BotLeft,
+	BotRight,
+	Custom(Position),
+}
+
 //--Sprite trait------------------------------------------------------------------------------------
 
 /// The interface for everything that can be rendered by the engine.
@@ -31,7 +41,7 @@ pub trait Sprite {
     fn set_position(&mut self, position: Position);
 
     /// Sets the center of the [`Sprite`] for rotations as well as translations
-    fn set_center(&mut self, center: Position);
+    fn set_center(&mut self, center: Center);
 
     /// Sets the rotation of the [`Sprite`] on the screen
     fn set_rotation(&mut self, rotation: f32);

src/sprite/shape_sprite.rs

@@ -5,7 +5,7 @@ use log::{debug, error, info, trace, warn};
 
 use crate::{
     renderer::WgpuRenderer,
-    sprite::Sprite,
+    sprite::{Sprite, Center},
     shape::Shape,
     utils::{Pixel, Position, Size},
 };
@@ -39,7 +39,7 @@ impl Sprite for ShapeSprite {
         todo!();
     }
 
-    fn set_center(&mut self, _center: Position) {
+    fn set_center(&mut self, _center: Center) {
         todo!();
     }
 

src/sprite/text_sprite.rs

@@ -5,7 +5,7 @@ use log::{debug, error, info, trace, warn};
 
 use crate::{
     renderer::WgpuRenderer,
-    sprite::Sprite,
+    sprite::{Sprite, Center},
     utils::{Pixel, Color, Position, Size},
 };
 use super::TextureSprite;
@@ -149,7 +149,7 @@ impl Sprite for TextSprite {
         self.texture_sprite.set_position(position);
     }
 
-    fn set_center(&mut self, center: Position) {
+    fn set_center(&mut self, center: Center) {
         self.texture_sprite.set_center(center);
     }
 

src/sprite/texture_sprite.rs

@@ -3,7 +3,7 @@ use log::{debug, error, info, trace, warn};
 
 //--Internal imports--------------------------------------------------------------------------------
 
-use super::Sprite;
+use super::{Sprite, Center};
 
 use crate::{
     texture::TextureHandle,
@@ -148,8 +148,28 @@ impl Sprite for TextureSprite {
         self.matrix.set_position(position);
     }
 
-    fn set_center(&mut self, center: Position) {
-        self.matrix.set_center(center);
+    fn set_center(&mut self, center: Center) {
+        let center_pos = match center {
+            Center::Geometric => Position {x: 0, y: 0},
+            Center::TopLeft   => Position {
+				x: -(self.inner_size.w as i32) / 2,
+				y:  (self.inner_size.h as i32) / 2
+			},
+            Center::TopRight  => Position {
+				x:  (self.inner_size.w as i32) / 2,
+				y:  (self.inner_size.h as i32) / 2
+			},
+            Center::BotLeft   => Position {
+				x: -(self.inner_size.w as i32) / 2,
+				y: -(self.inner_size.h as i32) / 2
+			},
+            Center::BotRight  => Position {
+				x:  (self.inner_size.w as i32) / 2,
+				y: -(self.inner_size.h as i32) / 2
+			},
+            Center::Custom(pos) => pos,
+        };
+        self.matrix.set_center(center_pos);
     }
 
     fn set_rotation(&mut self, rotation: f32) {