1 files changed, 119 insertions, 0 deletions
diff --git a/src/renderer/Mesh.zig b/src/renderer/Mesh.zig
new file mode 100644
index 0000000..b0f76ce
--- /dev/null
+++ b/src/renderer/Mesh.zig
@@ -0,0 +1,119 @@
+const c = @import("c.zig");
+const std = @import("std");
+const vk = @import("vulkan.zig");
+const gltf = @import("gltf.zig");
+const Allocator = std.mem.Allocator;
+
+const Mesh = @This();
+
+pub const Vertex = struct {
+    position: [3]f32,
+
+    pub fn create(x: f32, y: f32, z: f32) Vertex {
+        return Vertex{
+            .position = .{ x, y, z },
+        };
+    }
+
+    pub fn bindingDescription() c.VkVertexInputBindingDescription {
+        const binding_description: c.VkVertexInputBindingDescription = .{
+            .binding = 0,
+            .stride = @sizeOf(Vertex),
+            .inputRate = c.VK_VERTEX_INPUT_RATE_VERTEX,
+        };
+
+        return binding_description;
+    }
+
+    pub fn attributeDescription() c.VkVertexInputAttributeDescription {
+        const attribute_description: c.VkVertexInputAttributeDescription = .{
+            .location = 0,
+            .binding = 0,
+            .format = c.VK_FORMAT_R32G32B32_SFLOAT,
+            .offset = 0,
+        };
+
+        return attribute_description;
+    }
+};
+
+vertex_buffer: vk.Buffer,
+index_buffer: vk.Buffer,
+
+pub fn createVertexBuffer(allocator: Allocator, device: anytype) !vk.Buffer {
+    const gltf_data = try gltf.parseFile(allocator, "assets/models/block.glb");
+
+    const vertices = gltf_data.vertices;
+
+    var data: [*c]?*anyopaque = null;
+
+    const buffer = try device.createBuffer(vk.BufferUsage{ .transfer_src = true }, vk.BufferFlags{ .host_visible = true, .host_coherent = true }, @sizeOf(Vertex) * vertices.len);
+
+    try vk.mapError(c.vkMapMemory(
+        device.handle,
+        buffer.memory,
+        0,
+        buffer.size,
+        0,
+        @ptrCast(&data),
+    ));
+
+    if (data) |ptr| {
+        const gpu_vertices: [*]Vertex = @ptrCast(@alignCast(ptr));
+
+        @memcpy(gpu_vertices, @as([]Vertex, @ptrCast(vertices[0..])));
+    }
+
+    c.vkUnmapMemory(device.handle, buffer.memory);
+
+    const vertex_buffer = try device.createBuffer(vk.BufferUsage{ .vertex_buffer = true, .transfer_dst = true }, vk.BufferFlags{ .device_local = true }, @sizeOf(Vertex) * vertices.len);
+
+    try buffer.copyTo(device, vertex_buffer);
+    buffer.destroy(device.handle);
+
+    return vertex_buffer;
+}
+
+pub fn createIndexBuffer(allocator: Allocator, device: anytype) !vk.Buffer {
+    const gltf_data = try gltf.parseFile(allocator, "assets/models/block.glb");
+    const indices = gltf_data.indices;
+    //const indices = [_]u16{ 0, 1, 2, 3, 0, 2 };
+
+    var data: [*c]?*anyopaque = null;
+
+    const buffer = try device.createBuffer(vk.BufferUsage{ .transfer_src = true }, vk.BufferFlags{ .host_visible = true, .host_coherent = true }, @sizeOf(u16) * indices.len);
+
+    try vk.mapError(c.vkMapMemory(
+        device.handle,
+        buffer.memory,
+        0,
+        buffer.size,
+        0,
+        @ptrCast(&data),
+    ));
+
+    if (data) |ptr| {
+        const gpu_indices: [*]u16 = @ptrCast(@alignCast(ptr));
+
+        @memcpy(gpu_indices, indices[0..]);
+    }
+
+    c.vkUnmapMemory(device.handle, buffer.memory);
+
+    const index_buffer = try device.createBuffer(vk.BufferUsage{ .index_buffer = true, .transfer_dst = true }, vk.BufferFlags{ .device_local = true }, @sizeOf(u16) * indices.len);
+
+    try buffer.copyTo(device, index_buffer);
+    buffer.destroy(device.handle);
+
+    return index_buffer;
+}
+
+pub fn create(allocator: Allocator, device: anytype) !Mesh {
+    const vertex_buffer = try Mesh.createVertexBuffer(allocator, device);
+    const index_buffer = try Mesh.createIndexBuffer(allocator, device);
+
+    return Mesh{
+        .vertex_buffer = vertex_buffer,
+        .index_buffer = index_buffer,
+    };
+}