Removed ecs dependency from rendering

src/systems.zig

@@ -0,0 +1,54 @@
+const ecs = @import("ecs");
+const math = @import("math");
+const std = @import("std");
+
+pub fn render(pool: *ecs.Pool) anyerror!void {
+    var renderer = pool.resources.renderer;
+    const camera = pool.resources.camera;
+
+    const now = try std.time.Instant.now();
+    const delta_time: f32 = @as(f32, @floatFromInt(now.since(renderer.previous_time))) / @as(f32, 1_000_000_000.0);
+    pool.resources.delta_time = delta_time;
+    renderer.previous_time = now;
+
+    renderer.setCamera(camera);
+
+    const transform_memory = renderer.graphics_pipeline.transform_buffer.mapped_memory;
+
+    try renderer.begin();
+    
+    renderer.setLightCount(2);
+
+    for (renderer.transforms.items, 0..) |transform, i| {
+        transform_memory[i] = transform;
+        renderer.setTransform(@intCast(i));
+        renderer.device.draw(renderer.mesh.index_count, renderer.current_frame, renderer.mesh);
+    }
+    
+    try renderer.end();
+}
+
+pub fn moveCamera(pool: *ecs.Pool) !void {
+    const input = pool.resources.input;
+    var camera = pool.resources.camera;
+    const mul = @as(@Vector(3, f32), @splat(camera.speed * pool.resources.delta_time));
+
+    if (input.isKeyDown(.w)) {
+        camera.position += camera.target * mul;
+    }
+    if (input.isKeyDown(.s)) {
+        camera.position -= camera.target * mul;
+    }
+    if (input.isKeyDown(.a)) {
+        camera.position -= math.normalize(math.cross(camera.target, camera.up)) * mul;
+    }
+    if (input.isKeyDown(.d)) {
+        camera.position += math.normalize(math.cross(camera.target, camera.up)) * mul;
+    }
+    if (input.isKeyDown(.space)) {
+        camera.position += camera.up * mul;
+    }
+    if (input.isKeyDown(.left_shift)) {
+        camera.position -= camera.up * mul;
+    }
+}