1 decade ago by StuartTresadern
I wanted to test the performance using the new slope tiles in the box2D world. Below is the code I used .
If you use the physics sample and replace the game.js in the Box2D plugin folder with the code below it should draw all the collision polygons for all the slope types (it does not include the one way tiles). I don't intend to do anymore with this code as I intend to extend impact to allow custom box2d collision polygons to be created in the editor ). Still it may help anyone playing about with box2D and the new slope tiles.
If you use the physics sample and replace the game.js in the Box2D plugin folder with the code below it should draw all the collision polygons for all the slope types (it does not include the one way tiles). I don't intend to do anymore with this code as I intend to extend impact to allow custom box2d collision polygons to be created in the editor ). Still it may help anyone playing about with box2D and the new slope tiles.
ig.module(
'plugins.box2d.game'
)
.requires(
'plugins.box2d.lib',
'impact.game'
)
.defines(function() {
ig.Box2DGame = ig.Game.extend({
collisionRects: [],
collisionTriangles: [],
collisionPolys4: [],
debugCollisionRects: false,
loadLevel: function(data) {
// Find the collision layer and create the box2d world from it
for (var i = 0; i < data.layer.length; i++) {
var ld = data.layer[i];
if (ld.name == 'collision') {
ig.world = this.createWorldFromMap(ld.data, ld.width, ld.height, ld.tilesize);
break;
}
}
this.parent(data);
},
createWorldFromMap: function(origData, width, height, tilesize) {
var worldBoundingBox = new b2.AABB();
worldBoundingBox.lowerBound.Set(0, 0);
worldBoundingBox.upperBound.Set(
(width + 1) * tilesize * b2.SCALE,
(height + 1) * tilesize * b2.SCALE
);
var gravity = new b2.Vec2(0, this.gravity * b2.SCALE);
var world = new b2.World(worldBoundingBox, gravity, true);
// We need to delete those tiles that we already processed. The original
// map data is copied, so we don't destroy the original.
var data = ig.copy(origData);
// Get all the Collision Rects and Slopes from the map
this.collisionRects = []; // Original Rectangle Polygons
this.collisionTriangles = []; // New Triangle slope Polygons
this.collisionPolys4 = []; // New 4 point slope Polygons
for (var y = 0; y < height; y++) {
for (var x = 0; x < width; x++) {
// Create Triangle slope polygons
if (data [y][x] == 2 || data [y][x] == 13 || data [y][x] == 24 || data [y][x] == 35 ||
data [y][x] == 3 || data [y][x] == 14 || data [y][x] == 26 || data [y][x] == 37 ||
data [y][x] == 5 || data [y][x] == 16 || data [y][x] == 29 || data [y][x] == 40 ||
data [y][x] == 10 || data [y][x] == 11 || data [y][x] == 19 || data [y][x] == 20 ||
data [y][x] == 32 || data [y][x] == 33 || data [y][x] == 52 || data [y][x] == 53) {
var poly = {y:y,x:x,ptype:data [y][x]};
data[y][x] = 0; //unset Tile
this.collisionTriangles.push(poly);
}
// Create 4 point slope polygons
else if (data [y][x] == 4 || data [y][x] == 15 || data [y][x] == 25 || data [y][x] == 36 ||
data [y][x] == 6 || data [y][x] == 17 || data [y][x] == 28 || data [y][x] == 39 ||
data [y][x] == 7 || data [y][x] == 18 || data [y][x] == 27 || data [y][x] == 38 ||
data [y][x] == 8 || data [y][x] == 9 || data [y][x] == 21 || data [y][x] == 22 ||
data [y][x] == 41 || data [y][x] == 42 || data [y][x] == 43 || data [y][x] == 44 ||
data [y][x] == 30 || data [y][x] == 31 || data [y][x] == 54 || data [y][x] == 55) {
var poly = {y:y,x:x,ptype:data [y][x]};
data[y][x] = 0; //unset Tile
this.collisionPolys4.push(poly);
}
// If this tile is solid, find the rect of solid tiles starting
// with this one
else if (data[y][x] == 1) {
var r = this._extractRectFromMap(data, width, height, x, y);
this.collisionRects.push(r);
}
}
}
// Go through all rects we gathered and create Box2D objects from them
for (var i = 0; i < this.collisionRects.length; i++) {
var rect = this.collisionRects[i];
var bodyDef = new b2.BodyDef();
bodyDef.position.Set(
rect.x * tilesize * b2.SCALE + rect.width * tilesize / 2 * b2.SCALE,
rect.y * tilesize * b2.SCALE + rect.height * tilesize / 2 * b2.SCALE
);
var body = world.CreateBody(bodyDef);
var shape = new b2.PolygonDef();
shape.SetAsBox(
rect.width * tilesize / 2 * b2.SCALE,
rect.height * tilesize / 2 * b2.SCALE
);
body.CreateShape(shape);
}
// Calculate rise for slope Polygons.
var rise1 = (Math.tan((26.5).toRad()) * tilesize);
var rise2 = (Math.tan((18.43).toRad()) * tilesize);
var rise3 = (Math.tan((18.43).toRad()) * (2 * tilesize));
// Go through all triangle polygons we gathered and create Box2D objects from them
for (var i = 0; i < this.collisionTriangles.length; i++) {
var poly = this.collisionTriangles[i];
var bodyDef = new b2.BodyDef();
bodyDef.position.Set(
poly.x * tilesize * b2.SCALE + 1 * tilesize / 2 * b2.SCALE,
poly.y * tilesize * b2.SCALE + 1 * tilesize / 2 * b2.SCALE
);
var body = world.CreateBody(bodyDef);
var shape = new b2.PolygonDef();
shape.vertexCount = 3;
if (poly.ptype == 2) {// NW 45
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 13) {// SW 45
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 24) { // SW 45
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 35) { // SE 45
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 3) { // NW 26.5
var x1 = ((.5 * tilesize) - rise1) * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 14) { // SE 26.5
var x1 = ((.5 * tilesize) - rise1) * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 26) { // SE 26.5
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -((.5 * tilesize) - rise1) * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 37) { // SE 26.5
var x1 = ((.5 * tilesize) - rise1) * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 5) { // NW 15
var x1 = ((.5 * tilesize) - rise2) * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 16) { // SE 15
var x1 = -((.5 * tilesize) - rise2) * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 29) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = ((.5 * tilesize) - rise2) * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 40) { // SE 15
var x1 = -((.5 * tilesize) - rise2) * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 10) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = ((.5 * tilesize) - rise1) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 11) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = ((.5 * tilesize) - rise1) * b2.SCALE;
}
else if (poly.ptype == 19) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -((.5 * tilesize) - rise1) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 20) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -((.5 * tilesize) - rise1) * b2.SCALE;
}
else if (poly.ptype == 32) { // NW 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = ((.5 * tilesize) - rise2) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 33) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -((.5 * tilesize) - rise2) * b2.SCALE;
}
else if (poly.ptype == 52) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = ((.5 * tilesize) - rise2) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 53) { // SE 15
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -((.5 * tilesize) - rise2) * b2.SCALE;
}
shape.vertices[0].Set(y1, x1);
shape.vertices[1].Set(y2, x2);
shape.vertices[2].Set(y3, x3);
body.CreateShape(shape);
}
// Go through all 4 point slope polygons we gathered and create Box2D objects from them
for (var i = 0; i < this.collisionPolys4.length; i++) {
var poly = this.collisionPolys4[i];
var bodyDef = new b2.BodyDef();
bodyDef.position.Set(
poly.x * tilesize * b2.SCALE + 1 * tilesize / 2 * b2.SCALE,
poly.y * tilesize * b2.SCALE + 1 * tilesize / 2 * b2.SCALE
);
var body = world.CreateBody(bodyDef);
var shape = new b2.PolygonDef();
shape.vertexCount = 4;
if (poly.ptype == 4) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = ((.5 * tilesize) - rise1) * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 15) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = ((.5 * tilesize) - rise1) * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 25) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -((.5 * tilesize) - rise1) * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 36) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = ((.5 * tilesize) - rise1) * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 6) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = ((.5 * tilesize) - rise2) * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = ((.5 * tilesize) - rise3) * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 17) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = ((.5 * tilesize) - rise2) * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = ((.5 * tilesize) - rise3) * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 28) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -((.5 * tilesize) - rise2) * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -((.5 * tilesize) - rise3) * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 39) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = ((.5 * tilesize) - rise3) * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = ((.5 * tilesize) - rise2) * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 7) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = ((.5 * tilesize) - rise3) * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 18) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = -((.5 * tilesize) - rise3) * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 27) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = ((.5 * tilesize) - rise3) * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 38) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -((.5 * tilesize) - rise3) * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 8) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = ((.5 * tilesize) - rise1) * b2.SCALE;
}
else if (poly.ptype == 9) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = ((.5 * tilesize) - rise1) * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = -.5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 21) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = ((.5 * tilesize) - rise1) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 22) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -((.5 * tilesize) - rise1) * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 41) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = -((.5 * tilesize) - rise3) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -((.5 * tilesize) - rise2) * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 42) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = ((.5 * tilesize) - rise2) * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = ((.5 * tilesize) - rise3) * b2.SCALE;
}
else if (poly.ptype == 43) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = -((.5 * tilesize) - rise2) * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -((.5 * tilesize) - rise3) * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = .5 * tilesize * b2.SCALE;
}
else if (poly.ptype == 44) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = ((.5 * tilesize) - rise3) * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = ((.5 * tilesize) - rise2) * b2.SCALE;
}
else if (poly.ptype == 30) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = ((.5 * tilesize) - rise3) * b2.SCALE;
}
else if (poly.ptype == 31) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = -.5 * tilesize * b2.SCALE;
var x2 = -.5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = .5 * tilesize * b2.SCALE;
var x4 = .5 * tilesize * b2.SCALE;
var y4 = -((.5 * tilesize) - rise3) * b2.SCALE;
}
else if (poly.ptype == 54) {
var x1 = -.5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = .5 * tilesize * b2.SCALE;
var x3 = .5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = ((.5 * tilesize) - rise3) * b2.SCALE;
}
else if (poly.ptype == 55) {
var x1 = .5 * tilesize * b2.SCALE;
var y1 = .5 * tilesize * b2.SCALE;
var x2 = .5 * tilesize * b2.SCALE;
var y2 = -.5 * tilesize * b2.SCALE;
var x3 = -.5 * tilesize * b2.SCALE;
var y3 = -.5 * tilesize * b2.SCALE;
var x4 = -.5 * tilesize * b2.SCALE;
var y4 = -((.5 * tilesize) - rise3) * b2.SCALE;
}
shape.vertices[0].Set(y1, x1);
shape.vertices[1].Set(y2, x2);
shape.vertices[2].Set(y3, x3);
shape.vertices[3].Set(y4, x4);
body.CreateShape(shape);
}
return world;
},
_extractRectFromMap: function(data, width, height, x, y) {
var rect = {x: x, y: y, width: 1, height: 1};
// Find the width of this rect
for (var wx = x + 1; wx < width && data[y][wx] == 1; wx++) {
rect.width++;
data[y][wx] = 0; // unset tile
}
// Check if the next row with the same width is also completely solid
for (var wy = y + 1; wy < height; wy++) {
var rowWidth = 0;
for (wx = x; wx < x + rect.width && data[wy][wx] == 1; wx++) {
rowWidth++;
}
// Same width as the rect? -> All tiles are solid; increase height
// of this rect
if (rowWidth == rect.width) {
rect.height++;
// Unset tile row from the map
for (wx = x; wx < x + rect.width; wx++) {
data[wy][wx] = 0;
}
}
else {
return rect;
}
}
return rect;
},
update: function() {
ig.world.Step(ig.system.tick, 5);
this.parent();
},
draw: function() {
this.parent();
if (this.debugCollisionRects) {
// Draw outlines of all collision rects
var ts = this.collisionMap.tilesize;
for (var i = 0; i < this.collisionRects.length; i++) {
var rect = this.collisionRects[i];
ig.system.context.strokeStyle = '#00ff00';
ig.system.context.strokeRect(
ig.system.getDrawPos(rect.x * ts - this.screen.x),
ig.system.getDrawPos(rect.y * ts - this.screen.y),
ig.system.getDrawPos(rect.width * ts),
ig.system.getDrawPos(rect.height * ts)
);
}
}
}
});
});