Simulation of the Gravity Beats app
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
This repo is archived. You can view files and clone it, but cannot push or open issues/pull-requests.

86 lines 1.7 KiB Raw Permalink Blame History

 // // Beat.h // GravityBeats // // Created by Joshua Moerman on 1/9/13. // Copyright (c) 2013 Vadovas. All rights reserved. // #ifndef GravityBeats_Beat_h #define GravityBeats_Beat_h #include #include #include "UserInformation.h" template struct Note : public UserInformation{ // see http://en.wikipedia.org/wiki/Note_value enum Speed { kWholeNote =1, // 1 in one measure kHalfNote =2, // 2 in one measure kTriplet =3, // 3 in one measure kQuarterNote =4, // 4 kHalfTriplet =6, // 6 kEighthNote =8 // 8 } speed; int progress = -2; template Note(Speed speed, S... args) : UserInformation(args...) , speed(speed) {} // we could return how much it is off, to give the balls the right initial position and speed. bool update(float time_in_measure){ int new_progress = std::floor(time_in_measure*speed); if(new_progress != progress){ if(progress == -2){ progress = new_progress; return false; } else { progress = new_progress; return true; } } return false; } void reset(){ progress = -1; } }; template struct Beat { float total_length{4.0}; // 60 bpm float time{-0.1}; std::vector> notes; std::vector update(float dt){ std::vector ret; time += dt; // not needed, but keeps the floats small // also usefull when we want to change bpm if(time > total_length){ time -= total_length; for(auto& n : notes){ n.reset(); } } for(auto& n : notes){ if(n.update(time / total_length)){ ret.push_back(n.information); } } return ret; } }; #endif