From 091c2617a4f826cbd1f6ddeba904caa4e771e819 Mon Sep 17 00:00:00 2001
From: Raimon Zamora <jaildoctor@gmail.com>
Date: Mon, 10 Nov 2025 09:06:13 +0100
Subject: [PATCH] =?UTF-8?q?VERSI=C3=93=201.3.10=20-=20[NEW]=20sys.delta()?=
MIME-Version: 1.0
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---
 lua.cpp            | 10 ++++++++++
 version.h          |  2 +-
 vscode/library.lua |  3 +++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/lua.cpp b/lua.cpp
index d255cba..63f31a3 100644
--- a/lua.cpp
+++ b/lua.cpp
@@ -8,6 +8,8 @@ namespace fs = std::filesystem;
 
 extern "C" {
 
+    uint32_t last_update = 0;
+    float delta_time = 0.0f;
     // surface
     // ===============================================
 
@@ -637,6 +639,11 @@ extern "C" {
     // sys
     // ===============================================
 
+    static int cpp_sys_delta(lua_State *L) {
+        lua_pushnumber(L, delta_time);
+        return 1;
+    }
+
     static int cpp_sys_time(lua_State *L) {
         lua_pushnumber(L, time());
         return 1;
@@ -945,6 +952,7 @@ void push_lua_funcs() {
     lua_setglobal(L, "sound");
 
     lua_newtable(L);
+    lua_pushcfunction(L,cpp_sys_delta);             lua_setfield(L, -2, "delta");
     lua_pushcfunction(L,cpp_sys_time);              lua_setfield(L, -2, "time");
     lua_pushcfunction(L,cpp_sys_beat);              lua_setfield(L, -2, "beat");
     lua_pushcfunction(L,cpp_sys_update);            lua_setfield(L, -2, "update");
@@ -1211,6 +1219,8 @@ void lua_call_init() {
 
 void lua_call_update() {
     if (!update_exists) return;
+    delta_time = float(SDL_GetTicks() - last_update)/1000.0f;
+    last_update = SDL_GetTicks();
     lua_getglobal(L, "mini");
     lua_getfield(L, -1, "update");
     if (lua_pcall(L, 0, 0, 0)) {
diff --git a/version.h b/version.h
index a649917..138716e 100644
--- a/version.h
+++ b/version.h
@@ -1,3 +1,3 @@
 #pragma once
 
-#define MINI_VERSION "1.3.9"
+#define MINI_VERSION "1.3.10"
diff --git a/vscode/library.lua b/vscode/library.lua
index a6a7fd3..6f0216c 100644
--- a/vscode/library.lua
+++ b/vscode/library.lua
@@ -372,6 +372,9 @@ function sound.enabled(value) end
 ---@class sys
 sys = {}
 
+---Get delta time from last update in seconds (with decimals)
+function sys.delta() end
+
 ---Get current system timer in seconds (with decimals)
 function sys.time() end