New lineIntersectLine() function working nicely.

examples/wip/create map polygon.js

@@ -0,0 +1,174 @@
+
+var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, update: update, render: render });
+
+function preload() {
+
+    game.load.tilemap('map', 'assets/tilemaps/maps/platform.json', null, Phaser.Tilemap.TILED_JSON);
+    game.load.image('platformer_tiles', 'assets/tilemaps/tiles/platformer_tiles.png');
+    game.load.spritesheet('gameboy', 'assets/sprites/gameboy_seize_color_40x60.png', 40, 60);
+    game.load.spritesheet('balls', 'assets/sprites/balls.png', 17, 17);
+
+}
+
+var map;
+var layer;
+var sprite;
+var sprite2;
+var balls;
+
+function create() {
+
+    game.stage.backgroundColor = '#124184';
+
+    map = game.add.tilemap('map');
+
+    map.addTilesetImage('platformer_tiles');
+
+    map.setCollisionBetween(21, 53);
+
+    layer = map.createLayer('Tile Layer 1');
+
+    // layer.debug = true;
+
+    // var mapLayer = map.layers[0];
+
+
+
+    // var p = [];
+    // var direction = 'e';
+
+    // var x = 0;
+    // var y = 0;
+
+    // for (var y = 0, h = mapLayer.height; y < h; y++)
+    // {
+    //     for (var x = 0, w = mapLayer.width; x < w; x++)
+    //     {
+    //         var tile = mapLayer.data[y][x];
+
+    //         if (tile)
+    //         {
+    //             if (tile.faceTop)
+    //             tile.faceTop = false;
+    //             tile.faceBottom = false;
+    //             tile.faceLeft = false;
+    //             tile.faceRight = false;
+    //         }
+    //     }
+    // }
+
+    // sprite = game.add.sprite(270, 100, 'gameboy', 0);
+    // sprite.name = 'red';
+    // sprite.body.collideWorldBounds = true;
+    // sprite.body.minBounceVelocity = 0.9;
+    // sprite.body.bounce.setTo(0.5, 0.9);
+    // sprite.body.friction = 0.5;
+
+}
+
+
+
+/*---------------------------------------------------------------------------
+Returns an Object with the following properties:
+intersects        -Boolean indicating if an intersection exists.
+start_inside      -Boolean indicating if Point A is inside of the polygon.
+end_inside       -Boolean indicating if Point B is inside of the polygon.
+intersections    -Array of intersection Points along the polygon.
+centroid          -A Point indicating "center of mass" of the polygon.
+ 
+"pArry" is an Array of Points.
+----------------------------------------------------------------------------*/
+function lineIntersectPoly(A : Point, B : Point, pArry:Array):Object {
+    var An:int=1;
+    var Bn:int=1;
+    var C:Point;
+    var D:Point;
+    var i:Point;
+    var cx:Number=0;
+    var cy:Number=0;
+    var result:Object = new Object();
+    var pa:Array=pArry.slice(); //Copy to prevent growing points when connecting ends.
+        pa.push(pa[0]); //Create line from last Point to beginning Point 
+    result.intersects = false;
+    result.intersections=[];
+    result.start_inside=false;
+    result.end_inside=false;    
+    var n:int=pa.length-1;  
+    while(n > -1){
+        C=Point(pa[n]);
+        if(n > 0){
+            cx+=C.x;
+            cy+=C.y;                    
+            D=Point(pa[n-1])||Point(pa[0]);
+            i=lineIntersectLine(A,B,C,D);
+            if(i != null){
+                result.intersections.push(i);
+            }
+            if(lineIntersectLine(A,new Point(C.x+D.x,A.y),C,D) != null){
+                An++;
+            }
+            if(lineIntersectLine(B,new Point(C.x+D.x,B.y),C,D) != null){
+                Bn++;
+            }           
+        }
+        n--;
+    }
+    if(An % 2 == 0){
+        result.start_inside=true;
+    }
+    if(Bn % 2 == 0){
+        result.end_inside=true;
+    }       
+    result.centroid=new Point(cx/(pa.length-1),cy/(pa.length-1));
+    result.intersects = result.intersections.length > 0;
+    return result;
+}
+ 
+
+
+
+
+
+function launch() {
+
+    // sprite.body.velocity.x = -200;
+    // sprite.body.velocity.y = -200;
+
+    sprite2.body.velocity.x = -200;
+    sprite2.body.velocity.y = -200;
+
+}
+
+function update() {
+
+    // game.physics.collide(balls, layer);
+    // game.physics.collide(sprite, layer);
+    // game.physics.collide(sprite2, layer);
+    // game.physics.collide(sprite, sprite2);
+ 
+}
+
+function render() {
+
+    // game.debug.renderBodyInfo(sprite2, 32, 32);
+    // game.debug.renderPhysicsBody(sprite2.body);
+
+
+    // game.debug.renderText(sprite2.body.left, 32, 30);
+    // game.debug.renderText(sprite2.body.right, 32, 50);
+    // game.debug.renderText(sprite2.body.top, 32, 70);
+    // game.debug.renderText(sprite2.body.bottom, 32, 90);
+
+ 
+    // for (var i = 0; i < balls._container.length; i++)
+    // {
+
+    // }
+
+    // if (sprite)
+    // {
+    //     // game.debug.renderBodyInfo(sprite, 20, 30);
+        // game.debug.renderBodyInfo(sprite2, 20, 230);
+    // }
+
+}