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module: change state to avoid undefined, remove global allocator

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2024-04-05 17:05:48 -07:00 • committed by Stephen Gutekanst
parent 5dbf9ece3b
commit cf883f5544
11 changed files with 271 additions and 222 deletions
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55
examples/text/Game.zig
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@ -17,6 +17,8 @@ const Vec3 = math.Vec3;
const Mat3x3 = math.Mat3x3;
const Mat4x4 = math.Mat4x4;
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
timer: mach.Timer,
player: mach.ecs.EntityID,
direction: Vec2 = vec2(0, 0),
@ -28,6 +30,7 @@ texts: usize,
rand: std.rand.DefaultPrng,
time: f32,
style1: mach.ecs.EntityID,
allocator: std.mem.Allocator,
const d0 = 0.000001;
@ -101,7 +104,8 @@ fn init(
// TODO: better storage mechanism for this
// TODO: this is a leak
const styles = try engine.allocator.alloc(mach.ecs.EntityID, 3);
const allocator = gpa.allocator();
const styles = try allocator.alloc(mach.ecs.EntityID, 3);
styles[0] = style1;
styles[1] = style2;
styles[2] = style3;
@ -113,7 +117,7 @@ fn init(
}});
engine.dispatchNoError(); // TODO: no dispatch in user code
game.state = .{
game.init(.{
.timer = try mach.Timer.start(),
.spawn_timer = try mach.Timer.start(),
.player = player,
@ -123,7 +127,8 @@ fn init(
.rand = std.rand.DefaultPrng.init(1337),
.time = 0,
.style1 = style1,
};
.allocator = allocator,
});
}
fn deinit(engine: *mach.Engine.Mod) !void {
@ -137,8 +142,8 @@ fn tick(
) !void {
// TODO(engine): event polling should occur in mach.Engine module and get fired as ECS events.
var iter = core.pollEvents();
var direction = game.state.direction;
var spawning = game.state.spawning;
var direction = game.state().direction;
var spawning = game.state().spawning;
while (iter.next()) |event| {
switch (event) {
.key_press => |ev| {
@ -165,18 +170,18 @@ fn tick(
else => {},
}
}
game.state.direction = direction;
game.state.spawning = spawning;
game.state().direction = direction;
game.state().spawning = spawning;
var player_transform = text_mod.get(game.state.player, .transform).?;
var player_transform = text_mod.get(game.state().player, .transform).?;
var player_pos = player_transform.translation().divScalar(upscale);
if (spawning and game.state.spawn_timer.read() > 1.0 / 60.0) {
if (spawning and game.state().spawn_timer.read() > 1.0 / 60.0) {
// Spawn new entities
_ = game.state.spawn_timer.lap();
_ = game.state().spawn_timer.lap();
for (0..1) |_| {
var new_pos = player_pos;
new_pos.v[0] += game.state.rand.random().floatNorm(f32) * 25;
new_pos.v[1] += game.state.rand.random().floatNorm(f32) * 25;
new_pos.v[0] += game.state().rand.random().floatNorm(f32) * 25;
new_pos.v[1] += game.state().rand.random().floatNorm(f32) * 25;
const new_entity = try engine.newEntity();
try text_mod.set(new_entity, .pipeline, @intFromEnum(Pipeline.default));
@ -184,17 +189,17 @@ fn tick(
// TODO: better storage mechanism for this
// TODO: this is a leak
const styles = try engine.allocator.alloc(mach.ecs.EntityID, 1);
styles[0] = game.state.style1;
const styles = try game.state().allocator.alloc(mach.ecs.EntityID, 1);
styles[0] = game.state().style1;
try text_mod.set(new_entity, .text, text2);
try text_mod.set(new_entity, .style, styles);
game.state.texts += 1;
game.state().texts += 1;
}
}
// Multiply by delta_time to ensure that movement is the same speed regardless of the frame rate.
const delta_time = game.state.timer.lap();
const delta_time = game.state().timer.lap();
// Rotate entities
var archetypes_iter = engine.entities.query(.{ .all = &.{
@ -211,8 +216,8 @@ fn tick(
// transform = transform.mul(&Mat4x4.translate(location));
var transform = Mat4x4.ident;
transform = transform.mul(&Mat4x4.translate(location));
transform = transform.mul(&Mat4x4.rotateZ(2 * math.pi * game.state.time));
transform = transform.mul(&Mat4x4.scaleScalar(@min(math.cos(game.state.time / 2.0), 0.5)));
transform = transform.mul(&Mat4x4.rotateZ(2 * math.pi * game.state().time));
transform = transform.mul(&Mat4x4.scaleScalar(@min(math.cos(game.state().time / 2.0), 0.5)));
// TODO: .set() API is substantially slower due to internals
// try text_mod.set(id, .transform, transform);
@ -225,7 +230,7 @@ fn tick(
const speed = 200.0 / upscale;
player_pos.v[0] += direction.x() * speed * delta_time;
player_pos.v[1] += direction.y() * speed * delta_time;
try text_mod.set(game.state.player, .transform, Mat4x4.scaleScalar(upscale).mul(&Mat4x4.translate(player_pos)));
try text_mod.set(game.state().player, .transform, Mat4x4.scaleScalar(upscale).mul(&Mat4x4.translate(player_pos)));
text_mod.send(.updated, .{@intFromEnum(Pipeline.default)});
// Perform pre-render work
@ -238,11 +243,11 @@ fn tick(
engine.send(.present, .{}); // Present the frame
// Every second, update the window title with the FPS
if (game.state.fps_timer.read() >= 1.0) {
try core.printTitle("gfx.Text example [ FPS: {d} ] [ Texts: {d} ]", .{ game.state.frame_count, game.state.texts });
game.state.fps_timer.reset();
game.state.frame_count = 0;
if (game.state().fps_timer.read() >= 1.0) {
try core.printTitle("gfx.Text example [ FPS: {d} ] [ Texts: {d} ]", .{ game.state().frame_count, game.state().texts });
game.state().fps_timer.reset();
game.state().frame_count = 0;
}
game.state.frame_count += 1;
game.state.time += delta_time;
game.state().frame_count += 1;
game.state().time += delta_time;
}