fix: Python lags affecting game physics

Author: Mikel

src/client/client.cpp

@@ -69,6 +69,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "craftium.h"
 #include "gui/mainmenumanager.h"
+#include <chrono>
 
 extern gui::IGUIEnvironment* guienv;
 
@@ -208,13 +209,26 @@ void Client::pyConnStep() {
     u32 c; // stores the RGBA pixel color
     bool kill;
 
-    frameskip_count++;
+	/* Clear all virtual key presses except the movement ones (WASD) */
+	for (int i=0; i<KeyType::INTERNAL_ENUM_COUNT; i++) {
+		if (i != KeyType::FORWARD && i != KeyType::BACKWARD
+				&& i != KeyType::LEFT && i != KeyType::RIGHT) {
+			virtual_key_presses[i] = false;
+		}
+	}
 
+	// Update and check the frameskip condition
+    frameskip_count++;
     if (frameskip_count != frameskip)
         return;
-
     frameskip_count = 0;
 
+	/* Clear missing virtual key presses (WASD) */
+    virtual_key_presses[KeyType::FORWARD] = false;
+    virtual_key_presses[KeyType::BACKWARD] = false;
+    virtual_key_presses[KeyType::LEFT] = false;
+    virtual_key_presses[KeyType::RIGHT] = false;
+
     /* Take the screenshot */
     irr::video::IVideoDriver *driver = m_rendering_engine->get_video_driver();
     irr::video::IImage* const raw_image = driver->createScreenShot();
@@ -641,8 +655,11 @@ void Client::connect(const Address &address, const std::string &address_name,
 
 void Client::step(float dtime)
 {
-        syncClientStep();
+    syncClientStep();
+
+	dtime -= m_craftium_lag;
 
+	// printf("client dtime: %f, LIM: %f\n", dtime, DTIME_LIMIT);
 	// Limit a bit
 	if (dtime > DTIME_LIMIT)
 		dtime = DTIME_LIMIT;
@@ -655,10 +672,6 @@ void Client::step(float dtime)
 
 	ReceiveAll();
 
-        /* Clear virtual key presses */
-        for (int i=0; i<KeyType::INTERNAL_ENUM_COUNT; i++)
-            virtual_key_presses[i] = false;
-
 	/*
 		Packet counter
 	*/
@@ -760,7 +773,15 @@ void Client::step(float dtime)
 	*/
 	LocalPlayer *player = m_env.getLocalPlayer();
 
-        pyConnStep();
+	auto begin = std::chrono::steady_clock::now();
+    pyConnStep();
+	auto end = std::chrono::steady_clock::now();
+	std::chrono::duration<float> duration = end - begin;
+    float seconds = duration.count();
+	m_craftium_lag = seconds;
+
+	// printf("dtime: %f, delta (lag): %lf\n", dtime, seconds);
+
 
 	// Step environment (also handles player controls)
 	m_env.step(dtime);

src/client/client.h

@@ -617,4 +617,6 @@ class Client : public con::PeerHandler, public InventoryManager, public IGameDef
 
 	// The number of blocks the client will combine for mesh generation.
 	MeshGrid m_mesh_grid;
+
+	float m_craftium_lag = 0.0;
 };