{gfx,examples}: simplify text rendering API a bit
Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst
parent
393320aa68
commit
122a1ea9a7
5 changed files with 153 additions and 117 deletions
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@ -17,11 +17,14 @@ const Mat4x4 = math.Mat4x4;
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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info_text: mach.EntityID,
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info_text_style: mach.EntityID,
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timer: mach.Timer,
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gotta_go_fast: bool = false,
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spawn_timer: mach.Timer,
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fps_timer: mach.Timer,
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frame_count: usize,
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frame_rate: usize,
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num_sprites_spawned: usize,
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score: usize,
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rand: std.rand.DefaultPrng,
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@ -59,6 +62,20 @@ fn deinit(
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}
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fn init(
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audio: *mach.Audio.Mod,
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text_pipeline: *gfx.TextPipeline.Mod,
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text: *gfx.Text.Mod,
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sprite_pipeline: *gfx.SpritePipeline.Mod,
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game: *Mod,
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) !void {
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audio.schedule(.init);
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text.schedule(.init);
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text_pipeline.schedule(.init);
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sprite_pipeline.schedule(.init);
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game.schedule(.after_init);
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}
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fn afterInit(
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entities: *mach.Entities.Mod,
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core: *mach.Core.Mod,
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audio: *mach.Audio.Mod,
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@ -68,9 +85,9 @@ fn init(
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sprite_pipeline: *gfx.SpritePipeline.Mod,
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game: *Mod,
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) !void {
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audio.schedule(.init);
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text_pipeline.schedule(.init);
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sprite_pipeline.schedule(.init);
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// Configure the audio module to run our audio_state_change system when entities audio finishes
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// playing
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audio.state().on_state_change = game.system(.audio_state_change);
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// Create a sprite rendering pipeline
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const allocator = gpa.allocator();
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@ -79,13 +96,9 @@ fn init(
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sprite_pipeline.schedule(.update);
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// TODO: a better way to initialize entities with default values
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// TODO(text): most of these style options are not respected yet.
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// TODO(text): ability to specify other style options (custom font name, font color, italic/bold, etc.)
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const style1 = try entities.new();
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try text_style.set(style1, .font_name, "Roboto Medium"); // TODO
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try text_style.set(style1, .font_size, 48 * gfx.px_per_pt); // 48pt
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try text_style.set(style1, .font_weight, gfx.font_weight_normal);
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try text_style.set(style1, .italic, false);
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try text_style.set(style1, .color, vec4(0.6, 1.0, 0.6, 1.0));
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// Create a text rendering pipeline
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const text_rendering_pipeline = try entities.new();
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@ -96,32 +109,34 @@ fn init(
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const text1 = try entities.new();
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try text.set(text1, .pipeline, text_rendering_pipeline);
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try text.set(text1, .transform, Mat4x4.translate(vec3(0, 0, 0)));
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// TODO: better storage mechanism for this
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// TODO: this is a leak
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const styles = try allocator.alloc(mach.EntityID, 1);
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styles[0] = style1;
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try text.set(text1, .text, &.{
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try gfx.Text.allocPrintText(text, text1, style1,
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\\ Mach is probably working if you:
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\\ * See this text
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\\ * See sprites to the left
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\\ * Hear sound effects
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\\ * Hear sounds when sprites die
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\\ * Hold space and things go faster
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});
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try text.set(text1, .style, styles);
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try text.set(text1, .dirty, true);
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, .{});
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text.schedule(.update);
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const window_height: f32 = @floatFromInt(core.get(core.state().main_window, .height).?);
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const info_text = try entities.new();
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try text.set(info_text, .pipeline, text_rendering_pipeline);
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try text.set(info_text, .transform, Mat4x4.translate(vec3(0, (window_height / 2.0) - 50.0, 0)));
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try gfx.Text.allocPrintText(text, info_text, style1, "[info]", .{});
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// Load sfx
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const sfx_fbs = std.io.fixedBufferStream(assets.sfx.scifi_gun);
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const sfx_sound_stream = std.io.StreamSource{ .const_buffer = sfx_fbs };
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const sfx = try mach.Audio.Opus.decodeStream(gpa.allocator(), sfx_sound_stream);
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game.init(.{
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.info_text = info_text,
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.info_text_style = style1,
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.timer = try mach.Timer.start(),
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.spawn_timer = try mach.Timer.start(),
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.fps_timer = try mach.Timer.start(),
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.frame_count = 0,
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.frame_rate = 0,
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.num_sprites_spawned = 0,
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.score = 0,
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.rand = std.rand.DefaultPrng.init(1337),
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@ -133,12 +148,6 @@ fn init(
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core.schedule(.start);
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}
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fn afterInit(audio: *mach.Audio.Mod, game: *Mod) void {
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// Configure the audio module to run our audio_state_change system when entities audio finishes
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// playing
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audio.state().on_state_change = game.system(.audio_state_change);
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}
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fn audioStateChange(entities: *mach.Entities.Mod) !void {
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// Find audio entities that are no longer playing
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var q = try entities.query(.{
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@ -160,6 +169,7 @@ fn tick(
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core: *mach.Core.Mod,
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sprite: *gfx.Sprite.Mod,
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sprite_pipeline: *gfx.SpritePipeline.Mod,
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text: *gfx.Text.Mod,
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text_pipeline: *gfx.TextPipeline.Mod,
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game: *Mod,
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audio: *mach.Audio.Mod,
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@ -188,9 +198,25 @@ fn tick(
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}
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game.state().gotta_go_fast = gotta_go_fast;
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// Every second, update the frame rate
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if (game.state().fps_timer.read() >= 1.0) {
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game.state().frame_rate = game.state().frame_count;
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game.state().fps_timer.reset();
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game.state().frame_count = 0;
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}
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try gfx.Text.allocPrintText(
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text,
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game.state().info_text,
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game.state().info_text_style,
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"[ FPS: {d} ]\n[ Sprites spawned: {d} ]",
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.{ game.state().frame_rate, game.state().num_sprites_spawned },
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);
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text.schedule(.update);
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// var player_transform = sprite.get(game.state().player, .transform).?;
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// var player_pos = player_transform.translation();
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const framebuffer_width: f32 = @floatFromInt(core.get(core.state().main_window, .framebuffer_width).?);
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const window_width: f32 = @floatFromInt(core.get(core.state().main_window, .width).?);
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const entities_per_second: f32 = @floatFromInt(
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game.state().rand.random().intRangeAtMost(usize, 0, if (gotta_go_fast) 50 else 10),
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@ -199,7 +225,7 @@ fn tick(
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// Spawn new entities
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_ = game.state().spawn_timer.lap();
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var new_pos = vec3(-(framebuffer_width / 2), 0, 0);
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var new_pos = vec3(-(window_width / 2), 0, 0);
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new_pos.v[1] += game.state().rand.random().floatNorm(f32) * 50;
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const new_entity = try entities.new();
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@ -222,7 +248,7 @@ fn tick(
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for (v.ids, v.transforms) |id, *entity_transform| {
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const location = entity_transform.*.translation();
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const speed: f32 = if (gotta_go_fast) 2000 else 100;
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const progression = std.math.clamp((location.v[0] + (framebuffer_width / 2.0)) / framebuffer_width, 0, 1);
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const progression = std.math.clamp((location.v[0] + (window_width / 2.0)) / window_width, 0, 1);
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const scale = mach.math.lerp(2, 0, progression);
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if (progression >= 0.6) {
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try entities.remove(id);
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@ -298,18 +324,6 @@ fn endFrame(game: *Mod, core: *mach.Core.Mod) !void {
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// Present the frame
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core.schedule(.present_frame);
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// Every second, update the window title with the FPS
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if (game.state().fps_timer.read() >= 1.0) {
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try mach.Core.printTitle(
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core,
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core.state().main_window,
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"sprite [ FPS: {d} ] [ Sprites spawned: {d} ]",
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.{ game.state().frame_count, game.state().num_sprites_spawned },
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);
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core.schedule(.update);
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game.state().fps_timer.reset();
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game.state().frame_count = 0;
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}
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game.state().frame_count += 1;
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}
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