From ff8b849957ed63e6a19522597903f6bf55788426 Mon Sep 17 00:00:00 2001
From: Micha White <botahamec@outlook.com>
Date: Fri, 30 Sep 2022 21:20:08 -0400
Subject: Set up instances with texture information

---
 src/instance.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'src/instance.rs')

diff --git a/src/instance.rs b/src/instance.rs
index 6ea5321..eded8cf 100644
--- a/src/instance.rs
+++ b/src/instance.rs
@@ -12,6 +12,12 @@ pub struct Instance {
 	pub position: [f32; 2],
 	/// Relative size
 	pub size: [f32; 2],
+	/// The location of the texture in the texture atlas
+	pub texture_coordinates: [f32; 2],
+	/// The size of the sprite's texture
+	pub texture_size: [f32; 2],
+	/// The index of the texture atlas to use
+	pub texture_atlas_index: u32,
 	/// Rotation, in radians
 	pub rotation: f32,
 	/// z-index
@@ -25,14 +31,19 @@ impl Default for Instance {
 			size: [1.0; 2],
 			rotation: 0.0,
 			z_index: 0,
+			texture_coordinates: [0.0; 2],
+			texture_size: [1.0; 2],
+			texture_atlas_index: 0,
 		}
 	}
 }
 
 impl Instance {
 	// whenever this is updated, please also update `sprite.wgsl`
-	const ATTRIBUTES: [wgpu::VertexAttribute; 4] =
-		wgpu::vertex_attr_array![1 => Float32x2, 2 => Float32x2, 3 => Float32, 4 => Uint32];
+	const ATTRIBUTES: [wgpu::VertexAttribute; 7] = wgpu::vertex_attr_array![
+		1 => Float32x2, 2 => Float32x2, 3 => Float32x2, 4 => Float32x2,
+		5 => Uint32, 6 => Float32, 7 => Uint32
+	];
 
 	pub(crate) fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
 		// make sure these two don't conflict
-- 
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