blob: 61d81e56522f36e4c591f88f9a756e4e2a39bd7e [file] [log] [blame] [edit]
struct LightData {
position : vec4<f32>;
color : vec3<f32>;
radius : f32;
}
struct LightsBuffer {
lights : array<LightData>;
}
@group(0) @binding(0) var<storage, read_write> lightsBuffer : LightsBuffer;
struct TileLightIdData {
count : atomic<u32>;
lightId : array<u32, 64>;
}
struct Tiles {
data : array<TileLightIdData, 4>;
}
@group(1) @binding(0) var<storage, read_write> tileLightId : Tiles;
struct Config {
numLights : u32;
numTiles : u32;
tileCountX : u32;
tileCountY : u32;
numTileLightSlot : u32;
tileSize : u32;
}
@group(2) @binding(0) var<uniform> config : Config;
struct Uniforms {
min : vec4<f32>;
max : vec4<f32>;
viewMatrix : mat4x4<f32>;
projectionMatrix : mat4x4<f32>;
fullScreenSize : vec4<f32>;
}
@group(3) @binding(0) var<uniform> uniforms : Uniforms;
@stage(compute) @workgroup_size(64, 1, 1)
fn main(@builtin(global_invocation_id) GlobalInvocationID : vec3<u32>) {
var index = GlobalInvocationID.x;
if ((index >= config.numLights)) {
return;
}
lightsBuffer.lights[index].position.y = ((lightsBuffer.lights[index].position.y - 0.100000001) + (0.001 * (f32(index) - (64.0 * floor((f32(index) / 64.0))))));
if ((lightsBuffer.lights[index].position.y < uniforms.min.y)) {
lightsBuffer.lights[index].position.y = uniforms.max.y;
}
var M : mat4x4<f32> = uniforms.projectionMatrix;
var viewNear : f32 = (-(M[3][2]) / (-1.0 + M[2][2]));
var viewFar : f32 = (-(M[3][2]) / (1.0 + M[2][2]));
var lightPos = lightsBuffer.lights[index].position;
lightPos = (uniforms.viewMatrix * lightPos);
lightPos = (lightPos / lightPos.w);
var lightRadius : f32 = lightsBuffer.lights[index].radius;
var boxMin : vec4<f32> = (lightPos - vec4<f32>(vec3<f32>(lightRadius), 0.0));
var boxMax : vec4<f32> = (lightPos + vec4<f32>(vec3<f32>(lightRadius), 0.0));
var frustumPlanes : array<vec4<f32>, 6>;
frustumPlanes[4] = vec4<f32>(0.0, 0.0, -1.0, viewNear);
frustumPlanes[5] = vec4<f32>(0.0, 0.0, 1.0, -(viewFar));
let TILE_SIZE : i32 = 16;
let TILE_COUNT_X : i32 = 2;
let TILE_COUNT_Y : i32 = 2;
for(var y : i32 = 0; (y < TILE_COUNT_Y); y = (y + 1)) {
for(var x : i32 = 0; (x < TILE_COUNT_X); x = (x + 1)) {
var tilePixel0Idx : vec2<i32> = vec2<i32>((x * TILE_SIZE), (y * TILE_SIZE));
var floorCoord : vec2<f32> = (((2.0 * vec2<f32>(tilePixel0Idx)) / uniforms.fullScreenSize.xy) - vec2<f32>(1.0));
var ceilCoord : vec2<f32> = (((2.0 * vec2<f32>((tilePixel0Idx + vec2<i32>(TILE_SIZE)))) / uniforms.fullScreenSize.xy) - vec2<f32>(1.0));
var viewFloorCoord : vec2<f32> = vec2<f32>((((-(viewNear) * floorCoord.x) - (M[2][0] * viewNear)) / M[0][0]), (((-(viewNear) * floorCoord.y) - (M[2][1] * viewNear)) / M[1][1]));
var viewCeilCoord : vec2<f32> = vec2<f32>((((-(viewNear) * ceilCoord.x) - (M[2][0] * viewNear)) / M[0][0]), (((-(viewNear) * ceilCoord.y) - (M[2][1] * viewNear)) / M[1][1]));
frustumPlanes[0] = vec4<f32>(1.0, 0.0, (-(viewFloorCoord.x) / viewNear), 0.0);
frustumPlanes[1] = vec4<f32>(-1.0, 0.0, (viewCeilCoord.x / viewNear), 0.0);
frustumPlanes[2] = vec4<f32>(0.0, 1.0, (-(viewFloorCoord.y) / viewNear), 0.0);
frustumPlanes[3] = vec4<f32>(0.0, -1.0, (viewCeilCoord.y / viewNear), 0.0);
var dp : f32 = 0.0;
for(var i : u32 = 0u; (i < 6u); i = (i + 1u)) {
var p : vec4<f32>;
if ((frustumPlanes[i].x > 0.0)) {
p.x = boxMax.x;
} else {
p.x = boxMin.x;
}
if ((frustumPlanes[i].y > 0.0)) {
p.y = boxMax.y;
} else {
p.y = boxMin.y;
}
if ((frustumPlanes[i].z > 0.0)) {
p.z = boxMax.z;
} else {
p.z = boxMin.z;
}
p.w = 1.0;
dp = (dp + min(0.0, dot(p, frustumPlanes[i])));
}
if ((dp >= 0.0)) {
var tileId : u32 = u32((x + (y * TILE_COUNT_X)));
if (((tileId < 0u) || (tileId >= config.numTiles))) {
continue;
}
var offset : u32 = atomicAdd(&(tileLightId.data[tileId].count), 1u);
if ((offset >= config.numTileLightSlot)) {
continue;
}
tileLightId.data[tileId].lightId[offset] = GlobalInvocationID.x;
}
}
}
}