Format

DLASystem.cpp

@@ -6,11 +6,11 @@
 
 // colors
 namespace colours {
-	GLfloat blue[] = { 0.1, 0.3, 0.9, 1.0 };   // blue
-	GLfloat red[] = { 1.0, 0.2, 0.1, 0.2 };   // red
-	GLfloat green[] = { 0.3, 0.6, 0.3, 1.0 };     // green
-	GLfloat paleGrey[] = { 0.7, 0.7, 0.7, 1.0 };     // green
-	GLfloat darkGrey[] = { 0.2, 0.2, 0.2, 1.0 };     // green
+    GLfloat blue[] = {0.1, 0.3, 0.9, 1.0};   // blue
+    GLfloat red[] = {1.0, 0.2, 0.1, 0.2};   // red
+    GLfloat green[] = {0.3, 0.6, 0.3, 1.0};     // green
+    GLfloat paleGrey[] = {0.7, 0.7, 0.7, 1.0};     // green
+    GLfloat darkGrey[] = {0.2, 0.2, 0.2, 1.0};     // green
 }
 
 
@@ -56,10 +56,10 @@ void DLASystem::Reset() {
 
     // setup initial condition and parameters
     addCircle = 10;
-	killCircle = 2.0*addCircle;
+    killCircle = 2.0 * addCircle;
     clusterRadius = 0.0;
     // add a single particle at the origin
-	double pos[] = { 0.0, 0.0 };
+    double pos[] = {0.0, 0.0};
     addParticle(pos);
 
     // set the view
@@ -73,13 +73,13 @@ void DLASystem::Reset() {
 // but this corresponds to the middle of the grid array ie grid[ halfGrid ][ halfGrid ]
 void DLASystem::setGrid(double pos[], int val) {
     int halfGrid = gridSize / 2;
-	grid[(int)(pos[0] + halfGrid)][(int)(pos[1] + halfGrid)] = val;
+    grid[(int) (pos[0] + halfGrid)][(int) (pos[1] + halfGrid)] = val;
 }
 
 // read the grid cell for a given position
 int DLASystem::readGrid(double pos[]) {
     int halfGrid = gridSize / 2;
-	return grid[(int)(pos[0] + halfGrid)][(int)(pos[1] + halfGrid)];
+    return grid[(int) (pos[0] + halfGrid)][(int) (pos[1] + halfGrid)];
 }
 
 // check if the cluster is big enough and we should stop:
@@ -90,14 +90,13 @@ int DLASystem::checkStop() {
         cout << "STOP" << endl;
         glutPostRedisplay(); // update display
         return 1;
-	}
-	else return 0;
+    } else return 0;
 }
 
 // add a particle to the system at a specific position
 void DLASystem::addParticle(double pos[]) {
     // create a new particle
-	Particle * p = new Particle(pos);
+    Particle *p = new Particle(pos);
     // push_back means "add this to the end of the list"
     particleList.push_back(p);
     numParticles++;
@@ -147,14 +146,14 @@ void DLASystem::setPosNeighbour(double setpos[], double pos[], int val) {
 // if the view is smaller than the kill circle then increase the view area (zoom out)
 void DLASystem::updateViewSize() {
     double mult = 1.2;
-	if (viewSize < 2.0*killCircle) {
+    if (viewSize < 2.0 * killCircle) {
         setViewSize(viewSize * mult);
     }
 }
 
 // set the view to be the size of the add circle (ie zoom in on the cluster)
 void DLASystem::viewAddCircle() {
-	setViewSize(2.0*addCircle);  // factor of 2 is to go from radius to diameter
+    setViewSize(2.0 * addCircle);  // factor of 2 is to go from radius to diameter
 }
 
 // when we add a particle to the cluster, we should update the cluster radius
@@ -213,8 +212,7 @@ void DLASystem::moveLastParticle() {
                 logfile << numParticles << " " << clusterRadius << endl;
             }
         }
-	}
-	else {
+    } else {
         // if we get to here then we are trying to move to an occupied site
         // (this should never happen as long as the sticking probability is 1.0)
         cout << "reject " << rr << endl;
@@ -248,7 +246,7 @@ DLASystem::DLASystem(Window *set_win) {
     endNum = 1000;
 
     // allocate memory for the grid, remember to free the memory in destructor
-	grid = new int*[gridSize];
+    grid = new int *[gridSize];
     for (int i = 0; i < gridSize; i++) {
         grid[i] = new int[gridSize];
     }
@@ -279,7 +277,6 @@ DLASystem::~DLASystem() {
 }
 
 
-
 // this draws the system
 void DLASystem::DrawSquares() {
 
@@ -294,10 +291,10 @@ void DLASystem::DrawSquares() {
             glColor4fv(colours::green);
         else
             glColor4fv(colours::blue);
-		glRectd(drawScale*(vec[0] - halfSize),
-			drawScale*(vec[1] - halfSize),
-			drawScale*(vec[0] + halfSize),
-			drawScale*(vec[1] + halfSize));
+        glRectd(drawScale * (vec[0] - halfSize),
+                drawScale * (vec[1] - halfSize),
+                drawScale * (vec[0] + halfSize),
+                drawScale * (vec[1] + halfSize));
         glPopMatrix();
     }
 

DLASystem.h

@@ -5,7 +5,9 @@
 #include <fstream>
 #include <stdio.h>
 #include <vector>
+
 #define _USE_MATH_DEFINES
+
 #include <math.h>
 #include <random>
 #include <string>
@@ -19,13 +21,13 @@ using namespace std;
 
 
 class DLASystem {
-  private:
+private:
     // these are private variables and functions that the user will not see
 
     Window *win;  // window in which the system is running
 
     // list of particles
-    vector<Particle*> particleList;
+    vector<Particle *> particleList;
     int numParticles;
 
     // delete particles and clear the particle list
@@ -60,7 +62,7 @@ class DLASystem {
     double killRatio;   // how much bigger is the killCircle, compared to the addCircle
 
 
-  public:
+public:
     // these are public variables and functions
 
     // update the system: if there is an active particle then move it,
@@ -81,6 +83,7 @@ class DLASystem {
 
     // constructor
     DLASystem(Window *set_win);
+
     // destructor
     ~DLASystem();
 
@@ -94,17 +97,24 @@ class DLASystem {
     int checkStop();
 
     // stop/start the algorithm
-    void setRunning() { if ( checkStop()==0 ) running = 1; }
+    void setRunning() { if (checkStop() == 0) running = 1; }
+
     void pauseRunning() { running = 0; }
+
     // set whether it runs fast or slow
     void setSlow() { slowNotFast = 1; }
+
     void setFast() { slowNotFast = 0; }
+
     void setSuperFast() { slowNotFast = -1; }
 
     // set which part of the grid is visible on the screen
     // basically the screen shows co-ordinates -vv < x < vv
     // where vv is the input value
-    void setViewSize(double vv) { viewSize = vv; drawScale = 2.0/viewSize; }
+    void setViewSize(double vv) {
+        viewSize = vv;
+        drawScale = 2.0 / viewSize;
+    }
 
     // if the killcircle is almost as big as the view then increase the view
     void updateViewSize();
@@ -113,23 +123,26 @@ class DLASystem {
     void viewAddCircle();
 
     // if pos is outside the cluster radius then set clusterRadius to be the distance to pos.
-    void updateClusterRadius( double pos[] );
+    void updateClusterRadius(double pos[]);
 
     // set and read grid entries associated with a given position
     void setGrid(double pos[], int val);
+
     int readGrid(double pos[]);
 
     // return the distance of a given point from the origin
     double distanceFromOrigin(double pos[]) {
-      return sqrt( pos[0]*pos[0] + pos[1]*pos[1] );
+        return sqrt(pos[0] * pos[0] + pos[1] * pos[1]);
     }
 
     // set whether there is an active particle in the system or not
     void setParticleActive() { lastParticleIsActive = 1; }
+
     void setParticleInactive() { lastParticleIsActive = 0; }
 
     // add a particle at pos
     void addParticle(double pos[]);
+
     // add a particle at a random point on the addCircle
     void addParticleOnAddCircle();
 
@@ -150,5 +163,6 @@ class DLASystem {
     // it would be better for an OOP philosophy to make these member functions for the Window class
     // but we are being a bit lazy here
     void setWinBackgroundWhite() { glClearColor(1.0, 1.0, 1.0, 1.0); }
+
     void setWinBackgroundBlack() { glClearColor(0.0, 0.0, 0.0, 0.0); }
 };

Particle.h

@@ -1,7 +1,7 @@
 #pragma once
 
 class Particle {
-  public:
+public:
     static const int dim = 2;  // we are in two dimensions
     double *pos;  // pointer to an array of size dim, to store the position
 
@@ -9,12 +9,14 @@ class Particle {
     Particle() {
         pos = new double[dim];
     }
+
     // constructor, with a specified initial position
     Particle(double set_pos[]) {
         pos = new double[dim];
-      for (int d=0;d<dim;d++)
-        pos[d]=set_pos[d];
+        for (int d = 0; d < dim; d++)
+            pos[d] = set_pos[d];
     }
+
     // destructor
     ~Particle() { delete[] pos; }
 };

Window.cpp

@@ -2,12 +2,13 @@
 
 // constructor
 Window::Window(int set_size[], string &set_title) {
-  size[0]=set_size[0]; size[1]=set_size[1];
-  title=set_title;
+    size[0] = set_size[0];
+    size[1] = set_size[1];
+    title = set_title;
 
     locateOnScreen();
-  glutInitWindowSize(size[0],size[1]);
-  glutInitWindowPosition(pos[0],pos[1]);
+    glutInitWindowSize(size[0], size[1]);
+    glutInitWindowPosition(pos[0], pos[1]);
     glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
     glutCreateWindow(title.c_str());
 
@@ -16,10 +17,10 @@ Window::Window(int set_size[],  string &set_title) {
 }
 
 // print a string at a given position, don't worry about how this works...
-void Window::displayString( ostringstream &str, double x, double y, GLfloat col[]) {
+void Window::displayString(ostringstream &str, double x, double y, GLfloat col[]) {
     string localString = str.str();
     glColor4fv(col);
-    glRasterPos2d(x,y);
+    glRasterPos2d(x, y);
     for (int i = 0; i < localString.length(); i++) {
         glutBitmapCharacter(GLUT_BITMAP_8_BY_13, localString[i]);
     }

Window.h

@@ -8,7 +8,7 @@
 using namespace std;
 
 class Window {
-  public:
+public:
     string title;
     int size[2];
     int pos[2];
@@ -16,7 +16,7 @@ class Window {
     void locateOnScreen() {
         // the fx sets where on the screen the window will appear
         // (values should be between 0 and 1)
-      double fx[] = { 0.7,0.5 };
+        double fx[] = {0.7, 0.5};
         pos[0] = (glutGet(GLUT_SCREEN_WIDTH) - size[0]) * fx[0];
         pos[1] = (glutGet(GLUT_SCREEN_HEIGHT) - size[1]) * fx[1];
     }
@@ -26,7 +26,7 @@ class Window {
 
     // function which prints a string to the screen, at a given position, with a given color
     // note position is "absolute", not easy to get two strings spaced one above each other like this
-    void displayString( ostringstream &str, double x, double y, GLfloat col[]);
+    void displayString(ostringstream &str, double x, double y, GLfloat col[]);
 
 
 };

mainDLA.cpp

@@ -13,8 +13,11 @@ using namespace std;
 // functions which are needed for openGL go into a namespace so that we can identify them
 namespace drawFuncs {
     void handleKeypress(unsigned char key, int x, int y);
+
     void display(void);
+
     void update(int val);
+
     void introMessage();
 }
 
@@ -25,11 +28,11 @@ int main(int argc, char **argv) {
     // turn on glut
     glutInit(&argc, argv);
 
-  int window_size[] = { 480,480 };
+    int window_size[] = {480, 480};
     string window_title("simple DLA simulation");
 
     // create a window
-  Window *win = new Window(window_size,window_title);
+    Window *win = new Window(window_size, window_title);
 
     // create the system
     sys = new DLASystem(win);
@@ -43,8 +46,8 @@ int main(int argc, char **argv) {
     drawFuncs::introMessage();
 
     // tell openGL how to redraw the screen and respond to the keyboard
-	glutDisplayFunc(  drawFuncs::display );
-	glutKeyboardFunc( drawFuncs::handleKeypress );
+    glutDisplayFunc(drawFuncs::display);
+    glutKeyboardFunc(drawFuncs::handleKeypress);
 
     // tell openGL to do its first update after waiting 10ms
     int wait = 10;
@@ -131,8 +134,8 @@ void drawFuncs::handleKeypress(unsigned char key, int x, int y) {
 void drawFuncs::update(int val) {
     int wait;  // time to wait between updates (milliseconds)
 
-  if ( sys->running ) {
-    if ( sys->slowNotFast == 1)
+    if (sys->running) {
+        if (sys->slowNotFast == 1)
             wait = 10;
         else
             wait = 0;

rnd.h

@@ -1,4 +1,5 @@
 #pragma once
+
 #include <random>
 
 // ... don't worry how this all works
@@ -22,12 +23,18 @@ public:
         intmax = new std::uniform_int_distribution<int>(0, genMax);
         real01 = new std::uniform_real_distribution<double>(0.0, 1.0);
     }
+
     // destructor
-	~rnd() { delete intmax; delete real01; }
+    ~rnd() {
+        delete intmax;
+        delete real01;
+    }
 
     // set the random seed
     void setSeed(int seed) { generator.seed(seed); }
+
     // member functions for generating random double in [0,1] and random integer in [0,max-1]
     double random01() { return (*real01)(generator); }
+
     int randomInt(int max) { return (*intmax)(generator) % max; }
 };