Added object sprite animations

assets

@@ -1 +1 @@
-Subproject commit 05e5272f3789b44192d0bf2bd253641e76659a2a
+Subproject commit 38fd6766762ce90bb699f98e30e46b17c4eda50c

content/ship.toml

@@ -1,5 +1,5 @@
 [ship."Gypsum"]
-sprite = "ship::gypsum"
+sprite = "ship::peregrine"
 size = 100
 mass = 1
 hull = 200

content/sprite.toml

@@ -19,6 +19,23 @@ file = "projectile/blaster.png"
 [sprite."ship::gypsum"]
 file = "ship/gypsum.png"
 
+[sprite."ship::peregrine"]
+duration = 1
+repeat = "repeat"
+frames = [
+	"ship/peregrine/01.png",
+	"ship/peregrine/02.png",
+	"ship/peregrine/03.png",
+	"ship/peregrine/04.png",
+	"ship/peregrine/05.png",
+	"ship/peregrine/06.png",
+	"ship/peregrine/07.png",
+	"ship/peregrine/08.png",
+	"ship/peregrine/09.png",
+	"ship/peregrine/10.png",
+	"ship/peregrine/11.png",
+]
+
 [sprite."ui::radar"]
 file = "ui/radar.png"
 

crates/constants/src/lib.rs

@@ -55,3 +55,9 @@ pub const PARTICLE_SPRITE_INSTANCE_LIMIT: u64 = 1000;
 
 /// Must be small enough to fit in an i32
 pub const STARFIELD_SPRITE_INSTANCE_LIMIT: u64 = STARFIELD_COUNT * 24;
+
+/// The maximum number of sprites we can define
+pub const SPRITE_LIMIT: u32 = 1024;
+
+/// The maximum number of images we can load
+pub const IMAGE_LIMIT: u32 = 1024;

crates/content/src/lib.rs

@@ -208,6 +208,8 @@ impl Content {
 			part::sprite::Sprite::build(root.sprite.take().unwrap(), &mut content)?;
 		}
 
+		// TODO: enforce sprite and image limits
+
 		if root.ship.is_some() {
 			part::ship::Ship::build(root.ship.take().unwrap(), &mut content)?;
 		}

crates/render/shaders/object.wgsl

@@ -26,7 +26,39 @@ var texture_array: binding_array<texture_2d<f32>>;
 var sampler_array: binding_array<sampler>;
 
 
+fn fmod(x: f32, m: f32) -> f32 {
+	return x - floor(x / m) * m;
+}
 
+// Returns texture index
+// TODO: random age
+// TODO: preprocessor include function
+// TODO: packed location config, better error
+// TODO: bounce animations
+// TODO: animation randomness?
+fn animate(instance: InstanceInput) -> u32 {
+	// Age doesn't make sense here, so arbitrarily pick zero.
+	let age = global.current_time.x;
+	let len = sprites.data[instance.texture_index].frame_count;
+	let rep = sprites.data[instance.texture_index].repeatmode;
+	let fps = sprites.data[instance.texture_index].fps;
+	var frame: u32 = u32(0);
+	if rep == u32(1) {
+		// Repeat
+		frame = u32(fmod(
+			(age / fps),
+			f32(len)
+		));
+	} else {
+		// Once
+		frame = u32(min(
+			(age / fps),
+			f32(len) - 1.0
+		));
+	}
+	
+	return frame + sprites.data[instance.texture_index].first_frame;
+}
 
 @vertex
 fn vertex_main(
@@ -44,8 +76,7 @@ fn vertex_main(
 	var out: VertexOutput;
 	out.position = transform * vec4<f32>(vertex.position, 1.0);
 
-	let i = sprites.data[instance.texture_index].first_frame;
-	let t = atlas.data[i];
+	let t = atlas.data[animate(instance)];
 	out.texture_index = u32(0);
 	out.texture_coords = vec2(t.xpos, t.ypos);
 	if vertex.texture_coords.x == 1.0 {

crates/render/shaders/particle.wgsl

@@ -29,6 +29,30 @@ var texture_array: binding_array<texture_2d<f32>>;
 var sampler_array: binding_array<sampler>;
 
 
+// Returns texture index
+fn animate(instance: InstanceInput) -> u32 {
+	let age = global.current_time.x - instance.created;
+	let len = sprites.data[instance.texture_index].frame_count;
+	let rep = sprites.data[instance.texture_index].repeatmode;
+	let fps = sprites.data[instance.texture_index].fps;
+	var frame: u32 = u32(0);
+	if rep == u32(1) {
+		// Repeat
+		frame = u32(fmod(
+			(age / fps),
+			f32(len)
+		));
+	} else {
+		// Once
+		frame = u32(min(
+			(age / fps),
+			f32(len) - 1.0
+		));
+	}
+	
+	return frame + sprites.data[instance.texture_index].first_frame;
+}
+
 fn fmod(x: f32, m: f32) -> f32 {
 	return x - floor(x / m) * m;
 }
@@ -68,10 +92,7 @@ fn vertex_main(
 		));
 	}
 
-
-	// Pick image
-	frame = frame + sprites.data[instance.texture_index].first_frame;
-	let t = atlas.data[frame];
+	let t = atlas.data[animate(instance)];
 	out.texture_index = u32(0);
 	out.texture_coords = vec2(t.xpos, t.ypos);
 	if vertex.texture_coords.x == 1.0 {

crates/render/src/globaluniform/atlascontent.rs

@@ -1,4 +1,5 @@
 use bytemuck::{Pod, Zeroable};
+use galactica_constants::IMAGE_LIMIT;
 use std::mem;
 use wgpu;
 
@@ -14,14 +15,14 @@ pub struct ImageLocation {
 
 #[derive(Debug, Copy, Clone)]
 pub struct ImageLocationArray {
-	pub data: [ImageLocation; 108],
+	pub data: [ImageLocation; IMAGE_LIMIT as usize],
 }
 
 unsafe impl Pod for ImageLocationArray {}
 unsafe impl Zeroable for ImageLocationArray {
 	fn zeroed() -> Self {
 		Self {
-			data: [ImageLocation::zeroed(); 108],
+			data: [ImageLocation::zeroed(); IMAGE_LIMIT as usize],
 		}
 	}
 }

crates/render/src/globaluniform/globaluniform.rs

@@ -1,3 +1,4 @@
+use galactica_constants::{IMAGE_LIMIT, SPRITE_LIMIT};
 use wgpu;
 
 use super::{AtlasContent, DataContent, SpriteContent};
@@ -30,7 +31,7 @@ impl GlobalUniform {
 				starfield_size_limits: vec2<f32>,
 				current_time: vec2<f32>,
 			};
-		"#,
+			"#,
 		);
 		out.push_str("\n");
 
@@ -44,11 +45,16 @@ impl GlobalUniform {
 				width: f32,
 				height: f32,
 			};
-			struct AtlasUniform {
-				data: array<ImageLocation, 108>,
-			};
-		"#,
+			"#,
 		);
+		out.push_str(&format!(
+			r#"
+			struct AtlasUniform {{
+				data: array<ImageLocation, {}>,
+			}};
+			"#,
+			IMAGE_LIMIT,
+		));
 		out.push_str("\n");
 
 		// TODO: document
@@ -72,11 +78,16 @@ impl GlobalUniform {
 				padding_b: f32,
 				padding_c: f32,
 			};
-			struct SpriteUniform {
-				data: array<SpriteData, 108>,
-			};
-		"#,
+			"#,
 		);
+		out.push_str(&format!(
+			r#"
+			struct SpriteUniform {{
+				data: array<SpriteData, {}>,
+			}};
+			"#,
+			SPRITE_LIMIT,
+		));
 		out.push_str("\n");
 
 		return out;

crates/render/src/globaluniform/spritecontent.rs

@@ -1,4 +1,5 @@
 use bytemuck::{Pod, Zeroable};
+use galactica_constants::SPRITE_LIMIT;
 use std::mem;
 use wgpu;
 
@@ -19,14 +20,14 @@ pub struct SpriteData {
 
 #[derive(Debug, Copy, Clone)]
 pub struct SpriteDataArray {
-	pub data: [SpriteData; 108],
+	pub data: [SpriteData; SPRITE_LIMIT as usize],
 }
 
 unsafe impl Pod for SpriteDataArray {}
 unsafe impl Zeroable for SpriteDataArray {
 	fn zeroed() -> Self {
 		Self {
-			data: [SpriteData::zeroed(); 108],
+			data: [SpriteData::zeroed(); SPRITE_LIMIT as usize],
 		}
 	}
 }

crates/render/src/texturearray.rs

@@ -105,8 +105,9 @@ impl TextureArray {
 
 		println!("sending to gpu");
 		let mut image_counter = 0;
+		let mut sprite_counter = 0;
 		for t in &ct.sprites {
-			sprite_data.data[image_counter as usize] = SpriteData {
+			sprite_data.data[sprite_counter] = SpriteData {
 				frame_count: t.frames.len() as u32,
 				repeatmode: t.repeat.as_int(),
 				aspect: t.aspect,
@@ -114,6 +115,7 @@ impl TextureArray {
 				first_frame: image_counter,
 				_padding: Default::default(),
 			};
+			sprite_counter += 1;
 
 			// Insert texture location data
 			for path in &t.frames {