Fix event trigger

README.md

@@ -14,13 +14,13 @@ More about the project can be found [here](http://ian-r-rose.github.io/interacti
 An introduction to the underlying science can be found [here](http://ian-r-rose.github.io/interactive_earth/explanation.html).
 
 ## Compiling on Ubuntu Linux
-- Install ```fftw3```, ```SDL2```, and ```GLEW``` using ```apt-get```
+- Install ```fftw3```, ```SDL2```, and ```GLEW``` using ```apt-get install libfftw3-dev libsdl2-dev libglew-dev```
 - Rename ```Makefile.linux``` to ```makefile```
 - Run ```make``` on the command line to compile the project
 - run the program by typing its path and name in the command line: ```./interactive_earth```
 
 ## Compiling on a Mac
-- brew install the following dependencies: ```fftw3```, ```SDL2```, ```GLEW```
+- brew install the following dependencies: ```fftw```, ```SDL2```, ```GLEW```
 - rename ```Makefile.osx``` to ```makefile```
 - run the command ```make``` in the command line
 - run the program by typing its path and name in the command line: ```./interactive_earth```

main.cpp

@@ -182,7 +182,6 @@ inline void handle_mouse_or_finger_motion(float x, float y)
   float theta, r;
 
   compute_simulator_location( x, y, &theta, &r);
-
   press_theta = ltheta * theta / 2. / M_PI;
   press_r = lr*(r-r_inner)/(1.0f-r_inner);
 }
@@ -202,6 +201,9 @@ inline void handle_mouse_motion(SDL_MouseMotionEvent *event)
 //Update where to add heat
 inline void handle_finger_motion(SDL_TouchFingerEvent *event)
 {
+    if (SDL_GetTouchDevice(event->touchId)==0) {
+        return;
+    }
   float x = event->x - 0.5f;
   float y = 0.5f - event->y;
   handle_mouse_or_finger_motion(x, y);
@@ -257,6 +259,9 @@ inline void handle_finger_down(SDL_TouchFingerEvent *event)
 {
   if(event->type==SDL_FINGERDOWN)
   {
+      if (SDL_GetTouchDevice(event->touchId)==0) {
+          return;
+      }
     pressing = true;
     float x = event->x - 0.5f;
     float y = 0.5f - event->y;