From e3a66514d57ff4acf2f02df7d86bd2cf8be0e730 Mon Sep 17 00:00:00 2001
From: Reimar <Reimar@Leike.name>
Date: Tue, 8 Dec 2015 11:31:35 +0100
Subject: initial commit

---
 util.cpp | 173 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 util.cpp

(limited to 'util.cpp')

diff --git a/util.cpp b/util.cpp
new file mode 100644
index 0000000..a1cf8e9
--- /dev/null
+++ b/util.cpp
@@ -0,0 +1,173 @@
+#include "util.h"
+
+
+vector<vector<string> > splitString(string s)
+{
+	vector<vector<string> > result;
+	vector<string> line;
+	string word;
+	for(int i = 0; i < (int) s.size(); ++i)
+	{
+		if(s[i] == ' ')
+		{
+			line.push_back(word);
+			word = "";
+		}
+		else if(s[i] == '\n')
+		{
+			line.push_back(word);
+			word = "";
+			result.push_back(line);
+			line = vector<string>();
+		}
+		else
+			word += s[i];
+	}
+	line.push_back(word);
+	result.push_back(line);
+	return result;
+}
+
+void _tospace(string &s)
+{
+	for(int i = 0; i < (int) s.size(); ++i)
+		if(s[i] == '_')
+			s[i] = ' ';
+}
+
+void spaceto_(string &s)
+{
+	for(int i = 0; i < (int) s.size(); ++i)
+		if(s[i] == ' ')
+			s[i] = '_';
+}
+
+double round_beautiful(double d)
+{
+	if(d == 0)
+		return d;
+	double ten = 1;
+	while(d >= 10)
+	{
+		d/= 10;
+		ten *= 10;
+	}
+	while(d < 1)
+	{
+		d*= 10;
+		ten /= 10;
+	}
+	vector<double> candidates;
+	candidates.push_back((int)d);
+	candidates.push_back(((int)d) + 0.5);
+	if(ten > 1)
+	{
+		candidates.push_back(((int)d)/9.0*10);
+	}
+	int closest = 0;
+	double mindist = 10;
+	for(int i = 0; i < (int)candidates.size(); ++i)
+	{
+		if(mindist > fabs(candidates[i]-d))
+		{
+			mindist = fabs(candidates[i]-d);
+			closest = i;
+		}
+	}
+	double result = candidates[closest] * ten;
+	if(closest == 2)
+		result = (int) result;
+	return result;
+}
+
+SDL_Event relativate(const SDL_Event &e, SDL_Rect p)
+{
+	SDL_Event result = e;
+	if(e.type == SDL_MOUSEMOTION)
+	{
+		result.motion.x -= p.x;
+		result.motion.y -= p.y;
+	}
+	if(e.type == SDL_MOUSEBUTTONDOWN || e.type == SDL_MOUSEBUTTONUP)
+	{
+		result.button.x -= p.x;
+		result.button.y -= p.y;
+	}
+	return result;
+}
+
+bool inRect(SDL_Rect r, double x, double y)
+{
+	if(x < r.x || x >= r.x + r.w || y < r.y || y >= r.y + r.h)
+		return false;
+	return true;
+}
+
+SDL_Surface* copyImage(SDL_Surface* s)
+{
+	return SDL_ConvertSurface(s,s->format,SDL_SWSURFACE);
+}
+
+
+//loads a bitmap from file and converts it to screen properties
+SDL_Surface* loadBMP(std::string filename)
+{
+	SDL_Surface* loadedImage = NULL;
+	
+	SDL_Surface* convertedImage = NULL;
+	
+	loadedImage = IMG_Load(filename.c_str());
+	if(loadedImage != NULL)
+	{
+		convertedImage = SDL_DisplayFormat(loadedImage);
+		if(convertedImage)
+		{
+			Uint32 colorkey = SDL_MapRGB(convertedImage->format, 0, 1, 2);
+			SDL_SetColorKey(convertedImage, SDL_SRCCOLORKEY, colorkey);
+			SDL_FreeSurface(loadedImage);
+			return convertedImage;
+		}
+		cout << "Error: Could not convert Image" << filename << '.' << endl;
+	}
+	cout << "Error: Could not load bitmap from file " << filename << endl;
+	return NULL;
+}
+
+
+string lltostr(const long long& l)
+{
+	stringstream str;
+	str << l;
+	return str.str();
+}
+
+string dbltostr(const double& d, int dec)
+{
+	stringstream str;
+	long long bla = pow(10,dec);
+	str << ((long long) (bla*d))/((double) bla);
+	return str.str();
+}
+
+//returns true if the line intersects with the circle (or lies in it)
+bool intersects(double radius, double startx, double starty, double endx, double endy)
+{
+	double xdir = endx - startx;
+	double ydir = endy - starty;
+	//|dir*lambda+start|<radius
+	//(xdir^2+ydir^2)*lamda^2 + (xdir*startx + ydir*starty)*lamda + startx^2 + starty^2 - radius^2 = 0;
+	double a = xdir*xdir + ydir*ydir;
+	double b = xdir*startx + ydir*starty;
+	double c = startx*startx + starty*starty - radius*radius;
+	double dis = b*b - 4 * a * c;
+	if(dis < 0)
+		return false;
+	double sol1 = (-b + sqrt(dis))/(2*a);
+	if(sol1 < 0)
+		return false;
+	double sol2 = (-b - sqrt(dis))/(2*a);
+	if(sol2 > 1)
+		return false;
+	return true;
+	
+}
-- 
cgit v1.2.3