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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| use luisa::prelude::*; | ||
| use luisa_compute as luisa; | ||
| use std::env::current_exe; | ||
| fn main() { | ||
| use luisa::*; | ||
| init_logger(); | ||
|
|
||
| std::env::set_var("WINIT_UNIX_BACKEND", "x11"); | ||
|
|
||
| let args: Vec<String> = std::env::args().collect(); | ||
| assert!( | ||
| args.len() <= 2, | ||
| "Usage: {} <backend>. <backend>: cpu, cuda, dx, metal, remote", | ||
| args[0] | ||
| ); | ||
|
|
||
| let ctx = Context::new(current_exe().unwrap()); | ||
| let device = ctx.create_device(if args.len() == 2 { | ||
| args[1].as_str() | ||
| } else { | ||
| "cpu" | ||
| }); | ||
|
|
||
| let palette = device.create_callable::<(Expr<f32>,), Expr<Float3>>(&|d| { | ||
| make_float3(0.2, 0.7, 0.9).lerp(make_float3(1.0, 0.0, 1.0), Float3Expr::splat(d)) | ||
| }); | ||
| let rotate = device.create_callable::<(Expr<Float2>, Expr<f32>), Expr<Float2>>(&|mut p, a| { | ||
| let c = a.cos(); | ||
| let s = a.sin(); | ||
| make_float2(p.dot(make_float2(c, s)), p.dot(make_float2(-s, c))) | ||
| }); | ||
| let map = device.create_callable::<(Expr<Float3>, Expr<f32>), Expr<f32>>(&|mut p, time| { | ||
| for i in 0..8 { | ||
| let t = time * 0.2; | ||
| let r = rotate.call(p.xz(), t); | ||
| p = make_float3(r.x(), r.y(), p.y()).xzy(); | ||
| let r = rotate.call(p.xy(), t * 1.89); | ||
| p = make_float3(r.x(), r.y(), p.z()); | ||
| p = make_float3(p.x().abs() - 0.5, p.y(), p.z().abs() - 0.5) | ||
| } | ||
| Float3Expr::splat(1.0).copysign(p).dot(p) * 0.2 | ||
| }); | ||
| let rm = device.create_callable::<(Expr<Float3>, Expr<Float3>, Expr<f32>), Expr<Float4>>( | ||
| &|ro, rd, time| { | ||
| let t = var!(f32, 0.0); | ||
| let col = var!(Float3); | ||
| let d = var!(f32); | ||
| for_range(0i32..64, |i| { | ||
| let p = ro + rd * *t; | ||
| *d.get_mut() = map.call(p, time) * 0.5; | ||
| if_!(d.cmplt(0.02) | d.cmpgt(100.0), { break_() }); | ||
| *col.get_mut() += palette.call(p.length() * 0.1 / (400.0 * *d)); | ||
| *t.get_mut() += *d; | ||
| }); | ||
| let col = *col; | ||
| make_float4(col.x(), col.y(), col.z(), 1.0 / (100.0 * *d)) | ||
| }, | ||
| ); | ||
| let clear_kernel = device.create_kernel::<(Tex2d<Float4>,)>(&|img| { | ||
| let coord = dispatch_id().xy(); | ||
| img.write(coord, make_float4(0.3, 0.4, 0.5, 1.0)); | ||
| }); | ||
| let main_kernel = device.create_kernel::<(Tex2d<Float4>, f32)>(&|img, time| { | ||
| let xy = dispatch_id().xy(); | ||
| let resolution = dispatch_size().xy(); | ||
| let uv = (xy.float() - resolution.float() * 0.5) / resolution.x().float(); | ||
| let r = rotate.call(make_float2(0.0, -50.0), time); | ||
| let ro = make_float3(r.x(), r.y(), 0.0).xzy(); | ||
| let cf = (-ro).normalize(); | ||
| let cs = cf.cross(make_float3(0.0, 10.0, 0.0)).normalize(); | ||
| let cu = cf.cross(cs).normalize(); | ||
| let uuv = ro + cf * 3.0 + uv.x() * cs + uv.y() * cu; | ||
| let rd = (uuv - ro).normalize(); | ||
| let col = rm.call(ro, rd, time); | ||
| let color = col.xyz(); | ||
| let alpha = col.w(); | ||
| let old = img.read(xy).xyz(); | ||
| let accum = color.lerp(old, Float3Expr::splat(alpha)); | ||
| img.write(xy, make_float4(accum.x(), accum.y(), accum.z(), 1.0)); | ||
| }); | ||
| } |
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