renati/voxel-game
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Vectorized noise (but was it a bottleneck?)

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This commit is contained in:
Szymon Nowakowski
2025-12-02 01:57:21 +01:00
parent 320273b053
commit faddb1f35e
8 changed files with 262 additions and 49 deletions
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49
src/Game.zig
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@@ -21,8 +21,10 @@ const Interator2 = math.Interator2;
const Matrix4x4 = math.Matrix4x4;
const Quaternion = math.Quaternion;
const Vector2 = math.Vector2;
const Vector2x8 = math.Vector2x8;
const Vector3 = math.Vector3;
const Vector4 = math.Vector4;
const ps = math.ps;
const PointLight = extern struct {
positionWS: [3]f32,
@@ -628,27 +630,36 @@ pub fn init(allocator: std.mem.Allocator, engine: *Engine, swapchain: *Swapchain
);
const chunk = chunks.getPtr(chunk_coords3).?;
var it2 = Interator2(usize).init(0, 0, 15, 15);
while (it2.next()) |pos| {
const x, const y = pos;
const fpos = Vector2.init(
@floatFromInt(pos[0]),
@floatFromInt(pos[1]),
).add(origin.asVector2());
var y: usize = 0;
while (y < 16) : (y += 1) {
const fpos0 = Vector2x8.initScalars(
.{ 0, 1, 2, 3, 4, 5, 6, 7 },
@splat(@floatFromInt(y)),
).add(.initVector(origin.asVector2()));
const fpos1 = Vector2x8.initScalars(
.{ 8, 9, 10, 11, 12, 13, 14, 15 },
@splat(@floatFromInt(y)),
).add(.initVector(origin.asVector2()));
const iheight = worldgen.heightI(world_seed, fpos);
const iheight0 = worldgen.heightIv(world_seed, fpos0);
const iheight1 = worldgen.heightIv(world_seed, fpos1);
chunk.blocks[0][y][x] = block_bedrock;
var i: i32 = 0;
while (i < iheight) : (i += 1) {
const iz = i + 1;
const block = if (i + 1 == iheight)
block_grass
else if (i + 4 >= iheight)
block_dirt
else
block_stone;
chunk.blocks[@intCast(iz)][y][x] = block;
const iheightv: [16]i32 = @as([8]i32, iheight0) ++ @as([8]i32, iheight1);
var x: usize = 0;
while (x < 16) : (x += 1) {
chunk.blocks[0][y][x] = block_bedrock;
const iheight = iheightv[x];
var i: i32 = 0;
while (i < iheight) : (i += 1) {
const iz = i + 1;
const block = if (i + 1 == iheight)
block_grass
else if (i + 4 >= iheight)
block_dirt
else
block_stone;
chunk.blocks[@intCast(iz)][y][x] = block;
}
}
}
}