Merge pull request #66 from corwinkuiper/number-methods

Number methods

agb/src/display/object.rs

@@ -3,6 +3,7 @@ use core::cell::RefCell;
 use super::DISPLAY_CONTROL;
 use crate::bitarray::Bitarray;
 use crate::memory_mapped::MemoryMapped1DArray;
+use crate::number::Vector2D;
 
 const OBJECT_ATTRIBUTE_MEMORY: MemoryMapped1DArray<u16, 512> =
     unsafe { MemoryMapped1DArray::new(0x0700_0000) };
@@ -114,6 +115,15 @@ impl ObjectStandard<'_> {
     pub fn hide(&mut self) {
         self.attributes.set_mode(Mode::Hidden)
     }
+
+    /// Sets the x and y position of the object, performing casts as nessesary
+    /// to fit within the bits allocated for this purpose.
+    pub fn set_position(&mut self, position: Vector2D<i32>) {
+        let x = position.x as u16;
+        let y = position.y as u16;
+        self.attributes.set_x(x);
+        self.attributes.set_y(y);
+    }
 }
 
 impl<'a> ObjectAffine<'a> {
@@ -157,6 +167,15 @@ impl<'a> ObjectAffine<'a> {
         self.attributes.set_affine(aff.loan.index);
         self.aff_id = Some(aff.loan.index);
     }
+
+    /// Sets the x and y position of the object, performing casts as nessesary
+    /// to fit within the bits allocated for this purpose.
+    pub fn set_position(&mut self, position: Vector2D<i32>) {
+        let x = position.x as u16;
+        let y = position.y as u16;
+        self.attributes.set_x(x);
+        self.attributes.set_y(y);
+    }
 }
 
 fn set_bits(current: u16, value: u16, length: u16, shift: u16) -> u16 {

agb/src/syscall.rs

@@ -126,12 +126,10 @@ pub fn affine_matrix(
         rotation: u16,
     }
 
-    let rotation_for_input = (rotation as u16) << 8;
-
     let input = Input {
         y_scale: x_scale.to_raw(),
         x_scale: y_scale.to_raw(),
-        rotation: rotation_for_input,
+        rotation: rotation as u16,
     };
 
     unsafe {