McFunkypants

using UnityEngine;
using System.Collections;

public class FlyCamera : MonoBehaviour {
	
	/*
    Writen by Windexglow 11-13-10.  Use it, edit it, steal it I don't care.  
    Converted to C# 27-02-13 - no credit wanted.
    Simple flycam I made, since I couldn't find any others made public.  
    Made simple to use (drag and drop, done) for regular keyboard layout  

McFunkypants

Sid Meier's 10 Rules of Game Design

1. Choose a topic you have a passion for. Game Design is about creativity.

2. Do research after the game is done. Tap into the player’s brain.

3. Define your axioms, refine your axioms. Prototype, prototype, prototype; sit in all the chairs.

4. Double it or cut it in half. You are more wrong than you think.

McFunkypants

  // actually calculate the a-star path!
	// this returns an array of coordinates
	// that is empty if no path is possible
	return calculatePath();

} // end of findPath() function

McFunkypants

	// Path function, executes AStar algorithm operations
	function calculatePath()
	{
		// create Nodes from the Start and End x,y coordinates
		var	mypathStart = Node(null, {x:pathStart[0], y:pathStart[1]});
		var mypathEnd = Node(null, {x:pathEnd[0], y:pathEnd[1]});
		// create an array that will contain all world cells
		var AStar = new Array(worldSize);
		// list of currently open Nodes
		var Open = [mypathStart];

McFunkypants

  // Neighbours functions, used by findNeighbours function
	// to locate adjacent available cells that aren't blocked

	// Returns every available North, South, East or West
	// cell that is empty. No diagonals,
	// unless distanceFunction function is not Manhattan
	function Neighbours(x, y)
	{
		var	N = y - 1,
		S = y + 1,

McFunkypants

  // distanceFunction functions
	// these return how far away a point is to another

	function ManhattanDistance(Point, Goal)
	{	// linear movement - no diagonals - just cardinal directions (NSEW)
		return abs(Point.x - Goal.x) + abs(Point.y - Goal.y);
	}

	function DiagonalDistance(Point, Goal)
	{	// diagonal movement - assumes diag dist is 1, same as cardinals

McFunkypants

  // Node function, returns a new object with Node properties
	// Used in the calculatePath function to store route costs, etc.
	function Node(Parent, Point)
	{
		var newNode = {
			// pointer to another Node object
			Parent:Parent,
			// array index of this Node in the world linear array
			value:Point.x + (Point.y * worldWidth),
			// the location coordinates of this Node

McFunkypants

  // returns boolean value (world cell is available and open)
	function canWalkHere(x, y)
	{
		return ((world[x] != null) &&
			(world[x][y] != null) &&
			(world[x][y] <= maxWalkableTileNum));
	};

McFunkypants

// world is a 2d array of integers (eg world[10][15] = 0)
// pathStart and pathEnd are arrays like [5,10]
function findPath(world, pathStart, pathEnd)
{
  // shortcuts for speed
	var	abs = Math.abs;
	var	max = Math.max;
	var	pow = Math.pow;
	var	sqrt = Math.sqrt;

McFunkypants

// world is a 2d array of integers (eg world[10][15] = 0)
// pathStart and pathEnd are arrays like [5,10]
function findPath(world, pathStart, pathEnd)
{
  // shortcuts for speed
  var21abs = Math.abs;
  var	max = Math.max;
  var	pow = Math.pow;
  var	sqrt = Math.sqrt;