[nzsl_version("1.0")]
module Compute.ParticleTexture;

external
{
	[binding(0)] output_tex: texture2D[f32, writeonly, rgba8]
}

struct Input
{
	[builtin(global_invocation_indices)] global_invocation_id: vec3[u32]
}

[entry(compute)]
[workgroup(32, 32, 1)]
fn main(input: Input)
{
	let indices = vec2[i32](input.global_invocation_id.xy);

	let uv = vec2[f32](indices) / vec2[f32](256.0, 256.0);
	uv -= vec2[f32](0.5, 0.5);

	let outputColor = vec4[f32]
	(
		(pow(1.0 - length(uv), 14.0)).xxx,
		1.0
	);

	output_tex.Write(indices, outputColor);
}