collision

namespace collision

Collision detection (and projection-based collision response) of 2D shapes.
Based on the Separating Axis Theorem and supports detecting collisions between simple Axis-Aligned Boxes, convex polygons and circles based shapes.

Summary

Properties from collision

number

static maxChildren = 8

number

static maxDepth = 4

Methods from collision

Array<Renderable>

rayCast(line: Line, result: Array<Renderable>)

Public Properties

maxChildren collision.js:11

static maxChildren: number = 8

number

The maximum number of children that a quadtree node can contain before it is split into sub-nodes.

See: game.world.broadphase

maxDepth collision.js:22

static maxDepth: number = 4

number

The maximum number of levels that the quadtree will create.

See: game.world.broadphase

Public Methods

rayCast collision.js:94

rayCast(line: Line, result: Array<Renderable>) → {Array<Renderable>}

Checks for object colliding with the given line

    // define a line accross the viewport
    let ray = new me.Line(
        // absolute position of the line
        0, 0, [
        // starting point relative to the initial position
        new me.Vector2d(0, 0),
        // ending point
        new me.Vector2d(me.game.viewport.width, me.game.viewport.height)
    ]);

    // check for collition
    result = me.collision.rayCast(ray);

    if (result.length > 0) {
        // ...
    }

Parameters:
Name	Type	Attributes	Description
line	Line		line to be tested for collision
result	Array<Renderable>	<optional>	a user defined array that will be populated with intersecting physic objects.

Returns:
Type	Description
Array<Renderable>	an array of intersecting physic objects