/* --------------------------- pong ------------------------------------------ */ /* */ /* A virtual bouncing ball. */ /* Written by Olaf Matthes */ /* Based on pong (for Max) version 1.5 written by Richard Dudas. */ /* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */ /* */ /* This program is free software; you can redistribute it and/or */ /* modify it under the terms of the GNU General Public License */ /* as published by the Free Software Foundation; either version 2 */ /* of the License, or (at your option) any later version. */ /* */ /* This program is distributed in the hope that it will be useful, */ /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ /* GNU General Public License for more details. */ /* */ /* You should have received a copy of the GNU General Public License */ /* along with this program; if not, write to the Free Software */ /* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* */ /* Based on PureData by Miller Puckette and others. */ /* */ /* ---------------------------------------------------------------------------- */ #include "m_pd.h" static char *version = "pong v0.1, ported by Olaf Matthes \n" " written for Max by Richard Dudas"; typedef struct pong { t_object x_obj; t_outlet *p_bounceout; t_outlet *p_handout; t_outlet *p_velout; t_outlet *p_heightout; t_clock *p_klok; t_int p_ms; // ms count t_float p_time; // current time div by warp t_float p_timegrain; // timegrain in seconds t_float p_timegrainin; // timegrain in ms t_float p_warp; // timewarp in ms t_float p_dinit; // init distance t_float p_vinit; // init velocity t_float p_ainit; // base acceleration def -100 t_float p_damping; // realtime multiplicative damping t_float p_dhand; // virtual hand distance t_float p_force; // force of hand 1.0 = no force t_float p_accel; // current accel value t_float p_vi; // current velocity t_float p_di; // current distance t_float p_dt; // distance out t_float p_dtprev; // previous distance out for accel computation t_float p_vt; // velocity out t_int p_prevchg; // for logical transition } t_pong; /* ---------------------------------------------------------- */ /* ---- this stuff is mainly for the timer, on off etc... --- */ /* ---------------------------------------------------------- */ static void pong_reset(t_pong *x) { x->p_di = x->p_dinit; x->p_dt = x->p_dinit; // added x->p_dtprev = x->p_dinit; // added x->p_vi = x->p_vinit; x->p_vt = x->p_vinit; // added x->p_ms = 0; x->p_time = 0.; x->p_ainit = -100.; // added, but currently disabled x->p_accel = -100.; // reactivated (?) x->p_damping = 1.; // i.e. no initial damping x->p_prevchg = 0; // added /* x->p_ms = 0; x->p_time = 0.; x->p_timegrain = 0.05; // if ms grain = 50 x->p_timegrainin = 50; x->p_vinit = 0.; x->p_dinit = 100.; x->p_ainit = -100.; x->p_damping = 1.; // i.e. no initial damping x->p_dhand = 100.; x->p_force = 1.; // i.e. hand does nothing initially x->p_accel = -100.; x->p_vi = 0.; x->p_di = 100.; x->p_dt = 100.; // changed from 0 to 100 x->p_dtprev = 100.; // changed from 0 to 100 x->p_vt = 0.; x->p_prevchg = 0; */ } /* ---------------------------------------------------------- */ static void pong_timein(t_pong *x, t_floatarg n) { int thischg; x->p_time = n / x->p_warp; x->p_dt = ((x->p_accel * (x->p_time*x->p_time)) + (x->p_time * x->p_vi) + x->p_di); x->p_vt = ((x->p_dt - x->p_dtprev) / x->p_timegrain); if (x->p_dt < 0.) { x->p_dt *= -1.; x->p_di = 0.; x->p_vi = x->p_vt * (-1. * x->p_damping); // -1 will eventually be a damping variable //post("vel at bounce %f", x->p_vi); outlet_bang(x->p_bounceout); x->p_ms = 0; //x->p_dtprev= 0.; } //else x->p_dtprev = x->p_dt; /* ---------------------------------- virtual hand below ------------ */ if (x->p_dt > x->p_dhand) // presuming the hand is initially equal to the dinit thischg = 1; else thischg = 0; if (thischg != x->p_prevchg) { x->p_ms = 0; x->p_vi = x->p_vt; x->p_di = x->p_dhand; if (thischg == 0) { x->p_accel = -100.; // x->p_ainit in lieu of -100. outlet_float(x->p_handout, 0); } else { x->p_accel = (x->p_force * -100.); // x->p_ainit in lieu of -100. outlet_float(x->p_handout, 1); } } x->p_prevchg = thischg; outlet_float(x->p_velout, x->p_vt); outlet_float(x->p_heightout, x->p_dt); } static void pong_onoff(t_pong *x, t_floatarg n) { if (n != 0) clock_delay(x->p_klok, 0); else clock_unset(x->p_klok); } /* ---------------------------------------------------------- */ static void pong_bang(t_pong *x) { x->p_ms = 0; clock_delay(x->p_klok, 0); } static void pong_stop(t_pong *x) { clock_unset(x->p_klok); } /* ---------------------------------------------------------- */ static void pong_tick(t_pong *x) { clock_delay(x->p_klok, (t_int)x->p_timegrainin); pong_timein(x, x->p_ms); //outlet_float(x->p_heightout, (float)x->p_ms); x->p_ms = x->p_ms + x->p_timegrainin; } /* ---------------------------------------------------------- */ static void pong_tgrain(t_pong *x, t_floatarg n) { x->p_timegrain = n / x->p_warp; x->p_timegrainin = n; post("timegrain %f", x->p_timegrain); } /* ---------------------------------------------------------- */ static void pong_warpin(t_pong *x, t_floatarg n) { x->p_warp = n; x->p_timegrain = x->p_timegrainin / x->p_warp; post("timewarp %f ms = one sec", x->p_warp); } /* ---------------------------------------------------------- */ /* ----- these are to receive and store the init values ----- */ /* ---------------------------------------------------------- */ static void pong_initdist(t_pong *x, t_floatarg n) { x->p_dinit = n; } static void pong_initvel(t_pong *x, t_floatarg n) { x->p_vinit = n; } static void pong_damp(t_pong *x, t_floatarg n) { x->p_damping = n; } /* ---------------------------------------------------------- */ static void pong_baseacc(t_pong *x, t_floatarg n) { //post ("baseaccel currently disabled", 0); x->p_ainit = n; x->p_accel = x->p_ainit; } /* ---------------------------------------------------------- */ static void pong_hand(t_pong *x, t_floatarg n) { x->p_dhand = n; } static void pong_force(t_pong *x, t_floatarg n) { x->p_force = n; } /* ---------------------------------------------------------- */ static t_class *pong_class; static void *pong_new(t_floatarg n) { t_pong *x = (t_pong *)pd_new(pong_class); x->p_klok = clock_new(x, (t_method)pong_tick); inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("dist")); // distance inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("velo")); // velocity inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("damp")); // damping inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("force")); // hand force 1.0 = no force inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("hand")); // virtual hand (distance) if (n > 0) x->p_warp = n; else x->p_warp = 1000.; x->p_ms = 0; x->p_time = 0.; x->p_timegrain = 0.05; // if ms grain = 50 x->p_timegrainin = 50.0; x->p_vinit = 0.; x->p_dinit = 100.; x->p_ainit = -100.; x->p_damping = 1.; // i.e. no initial damping x->p_dhand = 100.; x->p_force = 1.; // i.e. hand does nothing initially x->p_accel = -100.; x->p_vi = 0.; x->p_di = 100.; x->p_dt = 100.; // changed from 0 to 100 x->p_dtprev = 100.; // changed from 0 to 100 x->p_vt = 0.; x->p_prevchg = 0; x->p_bounceout = outlet_new(&x->x_obj, gensym("bang")); x->p_handout = outlet_new(&x->x_obj, gensym("float")); x->p_velout = outlet_new(&x->x_obj, gensym("float")); x->p_heightout = outlet_new(&x->x_obj, gensym("float")); return (x); } #ifndef MAXLIB void pong_setup(void) { pong_class = class_new(gensym("pong"), (t_newmethod)pong_new, 0, sizeof(t_pong), 0, A_DEFFLOAT, 0); #else void maxlib_pong_setup(void) { pong_class = class_new(gensym("maxlib_pong"), (t_newmethod)pong_new, 0, sizeof(t_pong), 0, A_DEFFLOAT, 0); class_addcreator((t_newmethod)pong_new, gensym("pong"), A_DEFFLOAT, 0); #endif /* method handlers for inlets */ class_addmethod(pong_class, (t_method)pong_initdist, gensym("dist"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_initvel, gensym("velo"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_damp, gensym("damp"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_force, gensym("force"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_hand, gensym("hand"), A_FLOAT, 0); /* method handlers for other messages to first inlet */ class_addmethod(pong_class, (t_method)pong_tgrain, gensym("timegrain"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_warpin, gensym("timewarp"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_baseacc, gensym("baseaccel"), A_FLOAT, 0); class_addmethod(pong_class, (t_method)pong_reset, gensym("reset"), 0); class_addmethod(pong_class, (t_method)pong_stop, gensym("stop"), 0); class_addfloat(pong_class, pong_onoff); class_addbang(pong_class, pong_bang); #ifndef MAXLIB logpost(NULL, 4, version); #else class_sethelpsymbol(pong_class, gensym("maxlib/pong-help.pd")); #endif }