Pixel Perfect and BoundingBox Collision Detector for EaselJS Bitmaps and BitmapAnimations
Namespace
The default namespace is 'ndgmr': To check for a collision between to Bitmaps and/or BitmapAnimations
Example: Rectangular / BoundingBox Collision
var intersection = ndgmr.checkRectCollision(bitmap1,bitmap2);
// intersection is null if no collision, otherwise a {x,y,width,height}-Object is returned
Pixel Perfect Collision Example
var collision = ndgmr.checkPixelCollision(bitmap1,bitmap2,alphaThreshold,true);
// returns a rect with the global position of the colliding pixel(s)
// alphaThreshold default is 0, set to higher value to ignore collisions with semi transparent pixels
// the last parameter defines if all pixels should be checked, in this case it returns a
// rect with the size of the full collision, if false a rect with the size 1x1 is returned
Debugging
// To add debug-output on page use:
ndgmr.DEBUG_COLLISION = true;
// OR
ndgmr.DEBUG = true;
Note: debugging only applies to pixel perfect collision detection (when using checkPixelCollision());
All code and examples are released under an MIT License
The MIT License
Copyright (c) 2013 Olaf Horstmann
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.