init

src/world/chunk.zig

@@ -0,0 +1,91 @@
+const std = @import("std");
+const raylib = @cImport({
+    @cInclude("../../raylib/raylib.h");
+    @cInclude("../../raylib/raymath.h");
+    @cInclude("../../raylib/rlgl.h");
+});
+const A7r = std.mem.Allocator;
+
+pub const Chunk = struct {
+    tiles: []i32,
+    a7r: A7r,
+
+    pub fn init(a7r: A7r) !Chunk {
+        return Chunk{
+            .a7r = a7r,
+            .tiles = try a7r.alloc(i32, 32 * 32 * 32),
+        };
+    }
+
+    pub fn deinit(self: Chunk) void {
+        self.a7r.free(self.tiles);
+    }
+
+    pub fn getTile(self: Chunk, x: u5, y: u5, z: u5) i32 {
+        return self.tiles[@as(u15, x) << 10 | @as(u15, y) << 5 | @as(u15, z)];
+    }
+
+    pub fn setTile(self: Chunk, x: u5, y: u5, z: u5, tile: i32) void {
+        self.tiles[@as(u15, x) << 10 | @as(u15, y) << 5 | @as(u15, z)] = tile;
+    }
+
+    pub fn createMesh(_: Chunk) raylib.Mesh {
+        const triangle_count: u32 = 1;
+
+        const arr_size: c_uint = triangle_count * 3 * @sizeOf(f32);
+
+        const vertices: [*]f32 = @ptrCast(@alignCast(raylib.MemAlloc(arr_size * 3)));
+        const texcoords: [*]f32 = @ptrCast(@alignCast(raylib.MemAlloc(arr_size * 2)));
+        const normals: [*]f32 = @ptrCast(@alignCast(raylib.MemAlloc(arr_size * 3)));
+
+        vertices[0] = 0.0;
+        vertices[1] = 0.0;
+        vertices[2] = 0.0;
+        normals[0] = 0.0;
+        normals[1] = 1.0;
+        normals[2] = 0.0;
+        texcoords[0] = 0.0;
+        texcoords[1] = 0.0;
+
+        vertices[3] = 1.0;
+        vertices[4] = 0.0;
+        vertices[5] = 2.0;
+        normals[3] = 0.0;
+        normals[4] = 1.0;
+        normals[5] = 0.0;
+        texcoords[2] = 0.5;
+        texcoords[3] = 1.0;
+
+        vertices[6] = 2.0;
+        vertices[7] = 0.0;
+        vertices[8] = 0.0;
+        normals[6] = 0.0;
+        normals[7] = 1.0;
+        normals[8] = 0.0;
+        texcoords[4] = 1.0;
+        texcoords[5] = 0.0;
+
+        var mesh = raylib.Mesh{
+            .triangleCount = triangle_count,
+            .vertexCount = triangle_count * 3,
+
+            .vertices = vertices,
+            .texcoords = texcoords,
+            .texcoords2 = null,
+            .normals = normals,
+            .tangents = null,
+            .colors = null,
+            .indices = null,
+            .animVertices = null,
+            .animNormals = null,
+            .boneIds = null,
+            .boneWeights = null,
+            .vaoId = 0,
+            .vboId = null,
+        };
+
+        raylib.UploadMesh(@ptrCast(&mesh), false);
+
+        return mesh;
+    }
+};