# A* algorithm visualization in Java
A* search algorithm visualization written in Java with Processing graphic library.
#### Functions overview
```Java
public void settings()
public void setup() //Processing function, the first that is called
public void setupGrid() //makes the grid
public void drawGrid() //draws the grid
public void mousePressed() //Processing function, used to determine when mouse is pressed
public void aStar() //the search algorithm
public float heuristic() //the Heuristic function used by the algorithm
public void draw() //Processing function used to update the screen
public void drawPath() //it draws the path starting from the Target node and backtracks all the predecessors
```
#### Graphics
```Java
public void settings() {
w = 800; //width in pixels of window
h = 800; //height of window in pixels
sizeNode = 15; //always pixels
bgColor = new Color(0x03045e);
obstacleColor = new Color(0x0077b6);
lineColor = new Color(0xcaf0f8);
size(w,h);
}
```
You can easily change the dimensions of the window, the size of the nodes (smaller nodes = slower program) and the colors.
#### You need the Processing library
[Just download from here](https://processing.org/download) and remember to import it in your IDE. For example in Intellij Idea, select and add the folder 'processing/core/library' in Project Structure/Project Settings/Libraries from the editor.