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Flood fill the inside of voxels

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codemob-dev 2025-07-29 13:15:05 -04:00
parent 2c42f9e688
commit 5e9704b23c
1 changed files with 35 additions and 1 deletions
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36
src/models.zig
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@ -238,8 +238,42 @@ pub const Model = struct {
}
}
var grid: [meshGridSize][meshGridSize][meshGridSize]bool = .{.{.{true} ** meshGridSize} ** meshGridSize} ** meshGridSize;
var grid: [meshGridSize][meshGridSize][meshGridSize]bool = undefined;
const rawSize = 6*meshGridSize*meshGridSize - 12*meshGridSize + 8;
const queueSize = std.math.ceilPowerOfTwo(usize, rawSize) catch unreachable;
var floodfillQueue = main.utils.CircularBufferQueue(Vec3i).init(main.stackAllocator, queueSize);
defer floodfillQueue.deinit();
for(0..meshGridSize) |x| {
for(0..meshGridSize) |y| {
for(0..meshGridSize) |z| {
if((x == 0 or x == meshGridSize - 1 or y == 0 or y == meshGridSize - 1 or z == 0 or z == meshGridSize - 1) and !hollowGrid[x][y][z]) {
floodfillQueue.enqueue(.{@intCast(x), @intCast(y), @intCast(z)});
grid[x][y][z] = false;
}
}
}
}
while(floodfillQueue.dequeue()) |pos| {
for(Neighbor.iterable) |neighbor| {
const newPos = pos + neighbor.relPos();
if(newPos[0] < 0 or newPos[0] >= meshGridSize) continue;
if(newPos[1] < 0 or newPos[1] >= meshGridSize) continue;
if(newPos[2] < 0 or newPos[2] >= meshGridSize) continue;
const x: usize = @intCast(newPos[0]);
const y: usize = @intCast(newPos[1]);
const z: usize = @intCast(newPos[2]);
if(!grid[x][y][z]) continue;
if(hollowGrid[x][y][z]) continue;
grid[x][y][z] = false;
floodfillQueue.enqueue(newPos);
}
}
var collision: std.ArrayList(AABB) = .init(main.globalAllocator.allocator);