Right, it compiles but when loaded in PD it has four inlets when I only specified three!

I'm still not clear about the relationship between

inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("fin1"));

which I want to be the inlet that triggers the calculation, as well as storing the value in x_in1 and

class_addfloat(simile_class, simile_float);

which specifies the method for a float inlet!

Ed

Dr Edward Kelly Research Assistant in Sonic Arts London College of Communication University of the Arts London

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#include "m_pd.h"

typedef struct _simile { t_object x_obj; t_float x_win; float min; float sign; t_float x_in1; t_float x_in2; t_float x_result; t_outlet *x_outlet; } t_simile;

void simile_float(t_simile *x) { x->min = ( x->x_in1 > x->x_in2 ) ? x->x_in1 - x->x_in2 : x->x_in2 - x->x_in1; x->sign = ( x->x_in1 > x->x_in2 ) ? 1 : -1; x->x_result = (x->min * x->x_win) * x->sign; outlet_float(x->x_outlet, x->x_result); }
void simile_fin1(t_simile *x) { x->min = ( x->x_in1 > x->x_in2 ) ? x->x_in1 - x->x_in2 : x->x_in2 - x->x_in1; x->sign = ( x->x_in1 > x->x_in2 ) ? 1 : -1; x->x_result = (x->min * x->x_win) * x->sign; outlet_float(x->x_outlet, x->x_result); }
void simile_bang(t_simile *x) { outlet_float(x->x_outlet, x->x_result); }

t_class *simile_class;

void *simile_new(t_floatarg x_win) { t_simile *x = (t_simile *)pd_new(simile_class);
x->x_outlet = outlet_new(&x->x_obj, gensym("float")); inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("fin1")); floatinlet_new(&x->x_obj, &x->x_in2); floatinlet_new(&x->x_obj, &x->x_win); return (void *)x; }

void simile_setup(void) { simile_class = class_new(gensym("simile"), (t_newmethod)simile_new, 0, sizeof(t_simile), 0, A_DEFFLOAT, 0);
class_addbang(simile_class, simile_bang); class_addfloat(simile_class, simile_float); }