We doing global variables now

2025-07-07 21:11:55 +05:00
parent b2be9e3708
commit 7e162221ef
14 changed files with 521 additions and 1445 deletions
--- a/src/world.zig
+++ b/src/world.zig
@@ -0,0 +1,144 @@
+const Graphics = @import("graphics.zig");
+const Entity = @import("entity.zig");
+const Time = @import("time.zig");
+
+pub var time: Time = undefined;
+var next_stop: Time = undefined;
+var entities: [16]?Entity = undefined;
+
+pub var plane_mesh: Graphics.Mesh = undefined;
+pub var cube_mesh: Graphics.Mesh = undefined;
+pub var texture: Graphics.Texture = undefined;
+
+const World = @This();
+pub fn initDebug() void {
+    entities = .{null} ** 16;
+    entities[0] = .{
+        .position = .{ 0, 0 },
+        .player = true,
+    };
+    entities[1] = .{
+        .position = .{ 2, 0 },
+        .enemy = true,
+        .controller = .{
+            .move_units = 0.25,
+        },
+    };
+    entities[2] = .{
+        .position = .{ 3, 0 },
+        .enemy = true,
+        .controller = .{
+            .move_units = 0.25,
+        },
+    };
+    time = Time.ZERO;
+    World.plane_mesh = Graphics.loadMesh(@ptrCast(&PLANE_MESH_DATA));
+    World.cube_mesh = Graphics.loadMesh(@ptrCast(&CUBE_MESH_DATA));
+    World.texture = Graphics.loadTexture(2, 2, @ptrCast(&TEXTURE_DATA));
+}
+
+pub fn deinit() void {
+    Graphics.unloadMesh(World.plane_mesh);
+    Graphics.unloadMesh(World.cube_mesh);
+    Graphics.unloadTexture(World.texture);
+}
+
+pub fn updateReal(delta: f32) void {
+    const update_until = World.time.plus(Time.durationFromUnits(delta));
+    while (!World.time.past(update_until)) {
+        const current = Time.earliest(World.next_stop, update_until);
+        defer World.time = current;
+
+        for (&World.entities) |*entity| {
+            if (entity.*) |*e| e.update();
+        }
+    }
+}
+
+pub fn draw(delta: f32) void {
+    Graphics.drawMesh(World.plane_mesh, World.texture, .{ .scale = @splat(5) });
+    for (&World.entities) |*entity| {
+        if (entity.*) |*e| e.draw(delta);
+    }
+}
+
+pub fn requestUpdate(at: Time) void {
+    World.next_stop = Time.earliest(at, World.next_stop);
+}
+
+pub fn entityAt(position: @Vector(2, i32)) ?*Entity {
+    for (&World.entities) |*maybe_entity| {
+        if (maybe_entity.*) |*entity| {
+            if (@reduce(.And, entity.position == position))
+                return entity;
+        }
+    }
+    return null;
+}
+
+pub fn isFree(position: @Vector(2, i32)) bool {
+    return World.entityAt(position) == null;
+}
+
+pub fn getPlayer() ?*Entity {
+    for (&World.entities) |*maybe_entity| {
+        if (maybe_entity.*) |*entity| {
+            if (entity.player)
+                return entity;
+        }
+    }
+    return null;
+}
+
+const CUBE_MESH_DATA = [_]f32{
+    -0.5, 0.5,  -0.5, 0.0, 0.0,
+    0.5,  0.5,  -0.5, 0.0, 0.0,
+    -0.5, -0.5, -0.5, 0.0, 0.0,
+    0.5,  -0.5, -0.5, 0.0, 0.0,
+    -0.5, -0.5, -0.5, 0.0, 0.0,
+    0.5,  0.5,  -0.5, 0.0, 0.0,
+    0.5,  0.5,  -0.5, 0.0, 0.0,
+    0.5,  0.5,  0.5,  0.0, 0.0,
+    0.5,  -0.5, -0.5, 0.0, 0.0,
+    0.5,  -0.5, 0.5,  0.0, 0.0,
+    0.5,  -0.5, -0.5, 0.0, 0.0,
+    0.5,  0.5,  0.5,  0.0, 0.0,
+    0.5,  0.5,  0.5,  0.0, 0.0,
+    -0.5, 0.5,  0.5,  0.0, 0.0,
+    0.5,  -0.5, 0.5,  0.0, 0.0,
+    -0.5, -0.5, 0.5,  0.0, 0.0,
+    0.5,  -0.5, 0.5,  0.0, 0.0,
+    -0.5, 0.5,  0.5,  0.0, 0.0,
+    -0.5, 0.5,  0.5,  0.0, 0.0,
+    -0.5, 0.5,  -0.5, 0.0, 0.0,
+    -0.5, -0.5, 0.5,  0.0, 0.0,
+    -0.5, -0.5, -0.5, 0.0, 0.0,
+    -0.5, -0.5, 0.5,  0.0, 0.0,
+    -0.5, 0.5,  -0.5, 0.0, 0.0,
+    -0.5, 0.5,  0.5,  0.0, 0.0,
+    0.5,  0.5,  0.5,  0.0, 0.0,
+    -0.5, 0.5,  -0.5, 0.0, 0.0,
+    0.5,  0.5,  -0.5, 0.0, 0.0,
+    -0.5, 0.5,  -0.5, 0.0, 0.0,
+    0.5,  0.5,  0.5,  0.0, 0.0,
+    -0.5, -0.5, -0.5, 0.0, 0.0,
+    0.5,  -0.5, -0.5, 0.0, 0.0,
+    -0.5, -0.5, 0.5,  0.0, 0.0,
+    0.5,  -0.5, 0.5,  0.0, 0.0,
+    -0.5, -0.5, 0.5,  0.0, 0.0,
+    0.5,  -0.5, -0.5, 0.0, 0.0,
+};
+const PLANE_MESH_DATA = [_]f32{
+    -0.5, -0.5, 0, 0.0, 1.0,
+    0.5,  0.5,  0, 1.0, 0.0,
+    -0.5, 0.5,  0, 0.0, 0.0,
+    0.5,  0.5,  0, 1.0, 0.0,
+    -0.5, -0.5, 0, 0.0, 1.0,
+    0.5,  -0.5, 0, 1.0, 1.0,
+};
+const TEXTURE_DATA = [_]u8{
+    255, 64,  64,  255,
+    64,  255, 64,  255,
+    64,  64,  255, 255,
+    64,  64,  64,  255,
+};