since i discussed this topic in at least 2 other threads more or less "off topic" i thought i would start this one to collect all ideas and approaches to this problem.   i created 3 possible solutions at this time but all of them have their obstacles   example 1: http://test.xapient.net/phaser/ALL/moving-jumpthrough-platform-1.html   in this example i use the postbroadphase callback to determine the velocity of the player and decide not to collide if the player is moving upwards to the platform