Fps display, string Utils, rename to Txt

source/App.h

@@ -17,6 +17,8 @@ class App
 
 	//  vars
 	//--------------------------
+	float dt = 1.f;  // frame delta time
+
 	int iFontH = 18;  // font height
 
 
@@ -42,7 +44,7 @@ class App
 	}
 
 	//  write out text, from s
-	int Text(int x, int y);
+	int Txt(int x, int y);
 
 	//  fill rectangle
 	void Rect(int x, int y,

source/AppMain.cpp

@@ -17,9 +17,8 @@ bool AppMain::Run()
 	//VideoMode vm = VideoMode::getDesktopMode();
 	VideoMode vm = VideoMode(600, 400);
 
-	RenderWindow* window;
-	window = new RenderWindow(vm,
-		"SFML demo",  //  title
+	RenderWindow* window = new RenderWindow(
+		vm, "SFML demo",  //  title
 		Style::Default,  //Style::None,
 		ContextSettings());
 
@@ -54,6 +53,7 @@ bool AppMain::Run()
 
 	//  Loop
 	//------------------------------------------------
+	Clock timer;
 	while (window->isOpen())
 	{
 		//  Process events
@@ -72,6 +72,8 @@ bool AppMain::Run()
 				break;
 			}
 		}
+		sf::Time time = timer.restart();
+		app->dt = time.asSeconds();
 
 		//  Draw
 		//------------------

source/App_Graph.cpp

@@ -1,17 +1,17 @@
 #include "App.h"
+#include "Util.h"
 
 
 //  Graphics draw
 ///-----------------------------------------------------------------------------
 void App::Graph()
 {
 	//  clear screen
-	pWindow->clear();
 	//Rect(0,0, xWindow,yWindow, 0,0,0);
 
 	//  test
 	Clr(155,215,255);
-	s = "Cool.";
-	Text(0, 0);
+	s =  "Fps: " + f2s(1/dt,1,3);
+	Txt(10, 0);
 
 }

source/App_Init.cpp

@@ -20,7 +20,7 @@ bool App::Init()
 //------------------------------------------------------------------
 
 //  write out text
-int App::Text(int x, int y)
+int App::Txt(int x, int y)
 {
 	text.setString(s);
 	text.setColor(clr);

source/Util.cpp

@@ -0,0 +1,42 @@
+#include "Util.h"
+#include <sstream>
+#include <iomanip>
+#include <regex>
+using namespace std;
+
+
+//  string utils
+//------------------------------------------------------------------
+
+string i2s(const int v, const char width)
+{
+	ostringstream s;
+	if (width != 0)  s.width(width);  //s.fill(fill);
+	s << fixed << v;
+	return s.str();
+}
+
+string f2s(const float v, const char precision, const char width)
+{
+	ostringstream s;
+	if (width != 0)  s.width(width);
+	s << fixed << setprecision(precision) << v;
+	return s.str();
+}
+
+
+vector<string> split(const string& s, const string& reg)
+{
+	regex re(reg);
+	sregex_token_iterator
+		first{s.begin(), s.end(), re, -1},  // -1 split
+		last;
+	return {first, last};
+}
+
+string strlower(const string& s)
+{
+	string ss = s;
+	transform(ss.begin(), ss.end(), ss.begin(), ::tolower);
+	return ss;
+}

source/Util.h

@@ -0,0 +1,16 @@
+#pragma once
+#include <vector>
+#include <string>
+#include <algorithm>
+
+
+//  format int, float to string
+std::string i2s(const int v, const char width=0/*, const char fill=' '*/);
+std::string f2s(const float v, const char precision=2, const char width=4);
+
+//  split string
+std::vector<std::string> split(
+	const std::string& s, const std::string& reg);
+
+//  string to lower
+std::string strlower(const std::string& s);