Optimize bunnymark

4 files changed, 22 insertions, 5 deletions

diff --git a/alligator_render/Cargo.toml b/alligator_render/Cargo.toml
index cefb924..6de7b42 100644
--- a/alligator_render/Cargo.toml
+++ b/alligator_render/Cargo.toml
@@ -17,7 +17,7 @@ cgmath = "0.18"
 image = "0.24"
 texture_packer = "0.24"
 profiling = "1"
-tracy-client = { version = "0.14", optional = true }
+tracy-client = { version = "0.15", optional = true }
 dhat = { version = "0.3", optional = true }
 
 [lib]
diff --git a/alligator_render/examples/black.rs b/alligator_render/examples/black.rs
index b8846ca..106e0f0 100644
--- a/alligator_render/examples/black.rs
+++ b/alligator_render/examples/black.rs
@@ -6,6 +6,7 @@ fn update(_renderer: &mut Renderer) {}
 
 fn main() {
 	let start = std::time::Instant::now();
+
 	// configure the render window
 	let config = RenderWindowConfig {
 		//vsync: false,
diff --git a/alligator_render/examples/bunnymark.rs b/alligator_render/examples/bunnymark.rs
index 62371c9..4fe37d3 100644
--- a/alligator_render/examples/bunnymark.rs
+++ b/alligator_render/examples/bunnymark.rs
@@ -4,11 +4,26 @@ use alligator_render::{
 	ImageFormat, Instance, InstanceId, RenderWindowConfig, Renderer, TextureId,
 };
 
+fn xorshift_plus(seed: &mut [u64; 2]) -> u64 {
+	let mut t = seed[0];
+	let s = seed[1];
+
+	t ^= t << 23;
+	t ^= t >> 18;
+	t ^= s ^ (s >> 5);
+
+	seed[0] = s;
+	seed[1] = t;
+
+	t + s
+}
+
 #[derive(Debug)]
 struct State {
 	texture_id: TextureId,
 	bunnies: Vec<Bunny>,
 	previous_timestamp: Option<Instant>,
+	seed: [u64; 2],
 	stopped: bool,
 }
 
@@ -18,6 +33,7 @@ impl State {
 			texture_id,
 			bunnies: Vec::with_capacity(10_000_000),
 			previous_timestamp: None,
+			seed: [0x0D15EA5E8BADF00D, 0xDECAFBADDEADBEAF],
 			stopped: false,
 		}
 	}
@@ -78,13 +94,13 @@ impl State {
 			let instance_id = renderer.instances_mut().push_instance(Instance {
 				texture_coordinates: [texture_x, texture_y],
 				texture_size: [texture_width, texture_height],
-				size: [0.1, 0.1],
+				size: [0.08, 0.08],
 				position: [-1.5, 0.70],
 				..Default::default()
 			});
 
-			let velocity_x = fps.fract() / 24.0;
-			let velocity_y = 0.0;
+			let velocity_x = (xorshift_plus(&mut self.seed) % 1_000_000) as f32 / 25_000_000.0;
+			let velocity_y = (xorshift_plus(&mut self.seed) % 1_000_000) as f32 / 25_000_000.0;
 			self.bunnies.push(Bunny {
 				instance_id,
 				velocity_x,
diff --git a/alligator_render/src/config.rs b/alligator_render/src/config.rs
index c73c357..34b5856 100644
--- a/alligator_render/src/config.rs
+++ b/alligator_render/src/config.rs
@@ -80,7 +80,7 @@ impl<'a> Default for RenderWindowConfig<'a> {
 			title: "Alligator Game",
 			low_power: true,
 			vsync: true,
-			instance_capacity: 0, // TODO this should probably be bigger
+			instance_capacity: 500,
 		}
 	}
 }