zig/mach
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

examples/core: building without ECS

Browse source 
Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2024-09-22 13:25:49 -07:00 • committed by Emi Gutekanst
parent 2a13c07d9e
commit 0e12857154
35 changed files with 1365 additions and 4176 deletions
Download patch file Download diff file Expand all files Collapse all files

88
examples/piano/App.zig
View file

@ -16,41 +16,41 @@ const gpu = mach.gpu;
const math = mach.math;
const sysaudio = mach.sysaudio;
pub const App = @This();
const App = @This();
pub const mach_module = .app;
pub const mach_systems = .{ .start, .init, .deinit, .tick, .audio_state_change };
// TODO: banish global allocator
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
pub const name = .app;
pub const Mod = mach.Mod(@This());
pub const systems = .{
.start = .{ .handler = start },
.init = .{ .handler = init },
.deinit = .{ .handler = deinit },
.tick = .{ .handler = tick },
.audio_state_change = .{ .handler = audioStateChange },
};
pub const components = .{
.play_after = .{ .type = f32 },
};
ghost_key_mode: bool = false,
fn start(core: *mach.Core.Mod, audio: *mach.Audio.Mod, app: *Mod) void {
fn start(core: *mach.Core, audio: *mach.Audio, app: *App) void {
core.schedule(.init);
audio.schedule(.init);
app.schedule(.init);
}
fn init(core: *mach.Core.Mod, audio: *mach.Audio.Mod, app: *Mod) void {
core.state().on_tick = app.system(.tick);
core.state().on_exit = app.system(.deinit);
fn init(
core: *mach.Core,
audio: *mach.Audio,
app: *App,
app_tick: mach.Call(App, .tick),
app_deinit: mach.Call(App, .deinit),
app_audio_state_change: mach.Call(App, .audio_state_change),
) !void {
core.on_tick = app_tick.id;
core.on_exit = app_deinit.id;
// Configure the audio module to send our app's .audio_state_change event when an entity's sound
// finishes playing.
audio.state().on_state_change = app.system(.audio_state_change);
audio.on_state_change = app_audio_state_change.id;
// Initialize piano module state
app.init(.{});
@ -60,24 +60,21 @@ fn init(core: *mach.Core.Mod, audio: *mach.Audio.Mod, app: *Mod) void {
std.debug.print("[spacebar] enable ghost-key mode (demonstrate seamless back-to-back sound playback)\n", .{});
std.debug.print("[arrow up] increase volume 10%\n", .{});
std.debug.print("[arrow down] decrease volume 10%\n", .{});
core.schedule(.start);
}
fn deinit(core: *mach.Core.Mod, audio: *mach.Audio.Mod) void {
fn deinit(audio: *mach.Audio) void {
audio.schedule(.deinit);
core.schedule(.deinit);
}
fn audioStateChange(
entities: *mach.Entities.Mod,
audio: *mach.Audio.Mod,
app: *Mod,
audio: *mach.Audio,
app: *App,
) !void {
// Find audio entities that are no longer playing
var q = try entities.query(.{
.ids = mach.Entities.Mod.read(.id),
.playings = mach.Audio.Mod.read(.playing),
.playings = mach.Audio.read(.playing),
});
while (q.next()) |v| {
for (v.ids, v.playings) |id, playing| {
@ -87,7 +84,7 @@ fn audioStateChange(
// Play a new sound
const e = try entities.new();
try audio.set(e, .samples, try fillTone(audio, frequency));
try audio.set(e, .channels, @intCast(audio.state().player.channels().len));
try audio.set(e, .channels, @intCast(audio.player.channels().len));
try audio.set(e, .playing, true);
try audio.set(e, .index, 0);
}
@ -100,24 +97,24 @@ fn audioStateChange(
fn tick(
entities: *mach.Entities.Mod,
core: *mach.Core.Mod,
audio: *mach.Audio.Mod,
app: *Mod,
core: *mach.Core,
audio: *mach.Audio,
app: *App,
) !void {
while (core.state().nextEvent()) |event| {
while (core.nextEvent()) |event| {
switch (event) {
.key_press => |ev| {
switch (ev.key) {
// Controls
.space => app.state().ghost_key_mode = !app.state().ghost_key_mode,
.space => app.ghost_key_mode = !app.ghost_key_mode,
.down => {
const vol = math.clamp(try audio.state().player.volume() - 0.1, 0, 1);
try audio.state().player.setVolume(vol);
const vol = math.clamp(try audio.player.volume() - 0.1, 0, 1);
try audio.player.setVolume(vol);
std.debug.print("[volume] {d:.0}%\n", .{vol * 100.0});
},
.up => {
const vol = math.clamp(try audio.state().player.volume() + 0.1, 0, 1);
try audio.state().player.setVolume(vol);
const vol = math.clamp(try audio.player.volume() + 0.1, 0, 1);
try audio.player.setVolume(vol);
std.debug.print("[volume] {d:.0}%\n", .{vol * 100.0});
},
@ -126,11 +123,11 @@ fn tick(
// Play a new sound
const e = try entities.new();
try audio.set(e, .samples, try fillTone(audio, keyToFrequency(ev.key)));
try audio.set(e, .channels, @intCast(audio.state().player.channels().len));
try audio.set(e, .channels, @intCast(audio.player.channels().len));
try audio.set(e, .playing, true);
try audio.set(e, .index, 0);
if (app.state().ghost_key_mode) {
if (app.ghost_key_mode) {
// After that sound plays, we'll chain on another sound that is one semi-tone higher.
const one_semi_tone_higher = keyToFrequency(ev.key) * math.pow(f32, 2.0, (1.0 / 12.0));
try app.set(e, .play_after, one_semi_tone_higher);
@ -138,19 +135,19 @@ fn tick(
},
}
},
.close => core.schedule(.exit),
.close => core.exit(),
else => {},
}
}
// Grab the back buffer of the swapchain
// TODO(Core)
const back_buffer_view = core.state().swap_chain.getCurrentTextureView().?;
const back_buffer_view = core.swap_chain.getCurrentTextureView().?;
defer back_buffer_view.release();
// Create a command encoder
const label = @tagName(name) ++ ".tick";
const encoder = core.state().device.createCommandEncoder(&.{ .label = label });
const label = @tagName(mach_module) ++ ".tick";
const encoder = core.device.createCommandEncoder(&.{ .label = label });
defer encoder.release();
// Begin render pass
@ -175,15 +172,12 @@ fn tick(
// Submit our commands to the queue
var command = encoder.finish(&.{ .label = label });
defer command.release();
core.state().queue.submit(&[_]*gpu.CommandBuffer{command});
// Present the frame
core.schedule(.present_frame);
core.queue.submit(&[_]*gpu.CommandBuffer{command});
}
fn fillTone(audio: *mach.Audio.Mod, frequency: f32) ![]const f32 {
const channels = audio.state().player.channels().len;
const sample_rate: f32 = @floatFromInt(audio.state().player.sampleRate());
fn fillTone(audio: *mach.Audio, frequency: f32) ![]const f32 {
const channels = audio.player.channels().len;
const sample_rate: f32 = @floatFromInt(audio.player.sampleRate());
const duration: f32 = 1.5 * @as(f32, @floatFromInt(channels)) * sample_rate; // play the tone for 1.5s
const gain = 0.1;