2024-07-25 02:11:58 +02:00
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const gfx = @import("gfx");
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const hid = @import("hid");
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const ona = @import("ona");
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const std = @import("std");
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const Visuals = struct {
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2024-08-15 00:52:27 +02:00
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spawned: SpawnMap = SpawnMap.init(ona.heap.allocator),
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2024-07-25 02:11:58 +02:00
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random: std.Random.Xoroshiro128,
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mouse_position: @Vector(2, f32) = @splat(0),
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2024-08-15 00:52:27 +02:00
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const SpawnMap = ona.SlotMap(struct {
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color: gfx.Color,
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position: gfx.Vector2,
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rotation: f32,
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lifetime_seconds: f32,
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});
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2024-07-25 02:11:58 +02:00
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};
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fn cleanup(visuals: ona.Write(Visuals)) !void {
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2024-07-27 02:44:06 +02:00
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visuals.state.spawned.deinit();
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2024-07-25 02:11:58 +02:00
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}
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2024-07-30 00:50:40 +02:00
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pub const main = ona.App.game
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.with_module(gfx)
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.with_module(hid)
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.with_state(Visuals{.random = std.Random.Xoroshiro128.init(47342563891212)})
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.with_system(.update, ona.system_fn(update), .{.label = "spawn visuals"})
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.with_system(.render, ona.system_fn(render), .{.label = "render visuals"})
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.with_system(.exit, ona.system_fn(cleanup), .{.label = "clean up visuals"}).build();
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2024-07-25 02:11:58 +02:00
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2024-07-25 15:25:55 +02:00
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fn update(visuals: ona.Write(Visuals), events: ona.Receive(hid.Event), display: ona.Read(gfx.Display)) !void {
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2024-08-15 00:52:27 +02:00
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const float_speed = 6;
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for (0 .. visuals.state.spawned.next) |i| {
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const spawned = visuals.state.spawned.get(i) orelse {
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continue;
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};
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spawned.lifetime_seconds -= 1.0 / 60.0;
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spawned.position -= .{0, float_speed};
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if (spawned.lifetime_seconds <= 0) {
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std.debug.assert(visuals.state.spawned.remove(i) != null);
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}
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}
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2024-07-25 02:11:58 +02:00
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const random = visuals.state.random.random();
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const width: f32 = @floatFromInt(display.state.width);
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const height: f32 = @floatFromInt(display.state.height);
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for (events.messages()) |event| {
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switch (event) {
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.key_down => {
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2024-08-15 00:52:27 +02:00
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_ = try visuals.state.spawned.insert(.{
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2024-07-25 02:11:58 +02:00
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.lifetime_seconds = 2.5 + (5 * random.float(f32)),
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2024-08-15 00:52:27 +02:00
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.color = .{random.float(f32), random.float(f32), random.float(f32), random.float(f32)},
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.position = .{width * random.float(f32), height},
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.rotation = std.math.pi * random.float(f32),
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2024-07-25 02:11:58 +02:00
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});
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},
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.mouse_down => {
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2024-08-15 00:52:27 +02:00
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_ = try visuals.state.spawned.insert(.{
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2024-07-25 02:11:58 +02:00
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.lifetime_seconds = 2.5 + (5 * random.float(f32)),
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2024-08-15 00:52:27 +02:00
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.color = .{random.float(f32), random.float(f32), random.float(f32), random.float(f32)},
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.position = visuals.state.mouse_position,
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.rotation = std.math.pi * random.float(f32),
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2024-07-25 02:11:58 +02:00
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});
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},
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.mouse_motion => |motion| {
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visuals.state.mouse_position = motion.absolute_position;
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},
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else => {}
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}
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}
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}
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2024-08-15 00:52:27 +02:00
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fn render(visuals: ona.Write(Visuals), commands: gfx.Commands) !void {
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for (visuals.state.spawned.values()) |visual| {
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2024-07-30 00:50:40 +02:00
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try commands.draw_texture(.{
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.anchor = @splat(0.5),
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.position = visual.position,
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.tint = visual.color,
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.size = @as(gfx.Vector2, @splat(64)),
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2024-07-25 02:11:58 +02:00
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});
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}
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}
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