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change explosions a tiny bit so that they lose energy as they go through blocks #6

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Merged
Argmaster merged 2 commits into from
Apr 16, 2025
Merged

change explosions a tiny bit so that they lose energy as they go through blocks #6

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76095c6
change explosions
OneAvargeCoder193 Apr 16, 2025
15fd27b
some fixes
OneAvargeCoder193 Apr 16, 2025
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88 changes: 54 additions & 34 deletions src/renderer.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -801,7 +801,7 @@ pub const MeshSelection = struct { // MARK: MeshSelection
if(baseItem.block) |itemBlock| {
const heldBlock = blocks.Block{.typ = itemBlock, .data = 0};
if(heldBlock.hasTag("canIgnite") and oldBlock.hasTag("canBeIgnited")) {
explode(selectedPos, 40, 3.7);
explode(selectedPos, 80, 3.7);
return;
}

Expand Down Expand Up @@ -855,54 +855,74 @@ pub const MeshSelection = struct { // MARK: MeshSelection
}
}

fn explode(pos: Vec3i, strength: f32, _radius: f32) void {
std.debug.assert(_radius > 0.0);
std.debug.assert(_radius < 256.0);
fn explode(pos: Vec3i, strength: f32, radius: f32) void {
std.debug.assert(radius > 0.0);
std.debug.assert(radius < 256.0);
std.debug.assert(strength > 0.0);

const radius: u32 = @intFromFloat(@ceil(_radius));
const diameter: u32 = @intFromFloat(std.math.ceil(radius) * 2);

var seed = main.random.initSeed3D(main.seed, pos);
const goldenAngle = std.math.pi * (3.0 - @sqrt(5.0));

for(0..radius) |_rx| {
const rx: i32 = @intCast(_rx);
const numSamplesDist: usize = @intFromFloat(std.math.ceil(radius));

for(0..radius) |_ry| {
const ry: i32 = @intCast(_ry);
const numSamples: usize = @intFromFloat(std.math.ceil(4 * std.math.pi * radius * radius) * 2);

for(0..radius) |_rz| {
const rz: i32 = @intCast(_rz);
const exploded = main.utils.Array3D(bool).init(main.stackAllocator, diameter, diameter, diameter);
defer exploded.deinit(main.stackAllocator);
for (exploded.mem) |*e| {
e.* = false;
}

for (0..numSamples) |i| {
const z = 1 - 2 * @as(f32, @floatFromInt(i))/@as(f32, @floatFromInt(numSamples));
const radiusAtZ = @sqrt(1 - z * z);
const theta = goldenAngle * @as(f32, @floatFromInt(i));
const x = radiusAtZ * @cos(theta);
const y = radiusAtZ * @sin(theta);

const radiusSquared = _radius*_radius;
const distanceSquared: f32 = @floatFromInt(rx*rx + ry*ry + rz*rz);
var damage = strength;

for(0..2) |_fx| {
const fx: i32 = @intFromFloat(std.math.sign(@as(f32, @floatFromInt(_fx)) - 0.5));
for (0..numSamplesDist) |j| {
const d = @as(f32, @floatFromInt(j))/@as(f32, @floatFromInt(numSamplesDist));
const dist = radius * d;

for(0..2) |_fy| {
const fy: i32 = @intFromFloat(std.math.sign(@as(f32, @floatFromInt(_fy)) - 0.5));
const xOffset: i32 = @intFromFloat(x * dist);
const yOffset: i32 = @intFromFloat(y * dist);
const zOffset: i32 = @intFromFloat(z * dist);

for(0..2) |_fz| {
const fz: i32 = @intFromFloat(std.math.sign(@as(f32, @floatFromInt(_fz)) - 0.5));
const p = pos + Vec3i{xOffset, yOffset, zOffset};

const distanceDelta = main.random.nextFloat(&seed) - 0.5;
const distanceSquaredWithDelta = @max(0.0, @min(radiusSquared, distanceSquared + distanceDelta));
if(distanceSquaredWithDelta >= radiusSquared) continue;
var oldBlock = mesh_storage.getBlock(p[0], p[1], p[2]) orelse return;
if(oldBlock.typ == 0) continue;
if(oldBlock.hasTag("fluid")) continue;

const x = pos[0] +% fx*rx;
const y = pos[1] +% fy*ry;
const z = pos[2] +% fz*rz;
damage -= oldBlock.blockResistance();

var oldBlock = mesh_storage.getBlock(x, y, z) orelse return;
if(oldBlock.typ == 0) continue;
if(oldBlock.hasTag("fluid")) continue;
if (oldBlock.blockHealth() > damage) {
break;
}

const damage = (1.0 - (distanceSquaredWithDelta/radiusSquared))*strength - oldBlock.blockResistance();
if(oldBlock.blockHealth() > damage) continue;
const xCentered: usize = @intCast(xOffset + @as(i32, @intCast(diameter/2)));
const yCentered: usize = @intCast(yOffset + @as(i32, @intCast(diameter/2)));
const zCentered: usize = @intCast(zOffset + @as(i32, @intCast(diameter/2)));

main.network.Protocols.blockUpdate.send(main.game.world.?.conn, x, y, z, .{.typ = 0, .data = 0});
}
}
exploded.set(xCentered, yCentered, zCentered, true);

damage -= strength * 1.0/@as(f32, @floatFromInt(numSamplesDist));
}
}

for(0..diameter) |_rx| {
const rx = @as(i32, @intCast(_rx)) + pos[0] - @as(i32, @intCast(diameter/2));

for(0..diameter) |_ry| {
const ry = @as(i32, @intCast(_ry)) + pos[1] - @as(i32, @intCast(diameter/2));

for(0..diameter) |_rz| {
const rz = @as(i32, @intCast(_rz)) + pos[2] - @as(i32, @intCast(diameter/2));
if (exploded.get(_rx, _ry, _rz)) {
main.network.Protocols.blockUpdate.send(main.game.world.?.conn, rx, ry, rz, .{.typ = 0, .data = 0});
}
}
}
Expand Down