Max 5 API Reference

jit.distance.radial.c

/*
 *  jit.distance.radial.c
 *
 *  Copyright 2001-2005 - Cycling '74
 *  Derek Gerstmann - derek@cycling74.com
 *
 *  Functor for calculating Radial Manhattan distance
 *
 */

#include "jit.common.h"
#include "jit.functor.h"

// --------------------------------------------------------------------------

typedef struct _jit_functor_distance_radial
{
    t_jit_object    ob;
    double          radius[JIT_MATRIX_MAX_DIMCOUNT];

} t_jit_functor_distance_radial;

// --------------------------------------------------------------------------

t_jit_object *jit_functor_distance_radial_new(void);
t_jit_err jit_functor_distance_radial_free(t_jit_functor_distance_radial *x);
t_jit_err jit_functor_distance_radial_radius(t_jit_functor_distance_radial *x, void *attr, long argc, t_atom *argv);
t_jit_err jit_functor_distance_radial_recalc(t_jit_functor_distance_radial *x);

long jit_functor_distance_radial_eval_fixed(t_jit_functor_distance_radial *x, long dimcount, long *vals);
float jit_functor_distance_radial_eval_float32(t_jit_functor_distance_radial *x, long dimcount, float *vals);
double jit_functor_distance_radial_eval_float64(t_jit_functor_distance_radial *x, long dimcount, double *vals);

void jit_functor_distance_radial_fixlut_init(void);

t_class *_jit_functor_distance_radial_class;

// --------------------------------------------------------------------------

t_jit_err jit_functor_distance_radial_init(void)
{
    t_jit_object *attr;

    // create class
    _jit_functor_distance_radial_class = jit_class_new("jit_functor_distance_radial",(method)jit_functor_distance_radial_new,(method)jit_functor_distance_radial_free,
        sizeof(t_jit_functor_distance_radial),0L);

    // add attribute methods
    attr = jit_object_new(_jit_sym_jit_attr_offset_array,"radius",_jit_sym_float64,JIT_MATRIX_MAX_DIMCOUNT,0,
        (method)0L,(method)jit_functor_distance_radial_radius,calcoffset(t_jit_functor_distance_radial,radius),calcoffset(t_jit_functor_distance_radial,radius));
    jit_class_addattr(_jit_functor_distance_radial_class,attr);

    // add evaluation methods
    jit_class_addmethod(_jit_functor_distance_radial_class, (method)jit_functor_distance_radial_eval_fixed,         "evalfixed",    A_CANT, 0L);
    jit_class_addmethod(_jit_functor_distance_radial_class, (method)jit_functor_distance_radial_eval_float32,   "evalfloat32",  A_CANT, 0L);
    jit_class_addmethod(_jit_functor_distance_radial_class, (method)jit_functor_distance_radial_eval_float64,   "evalfloat64",  A_CANT, 0L);

    // add functor to registry
    jit_functor_setup_class(_jit_functor_distance_radial_class,"distance","radial");
    jit_class_register(_jit_functor_distance_radial_class);

    return JIT_ERR_NONE;
}

t_jit_object *jit_functor_distance_radial_new(void)
{
    long i;
    t_jit_functor_distance_radial *x;

    if (x = (t_jit_functor_distance_radial *)jit_object_alloc(_jit_functor_distance_radial_class)) {

        // initialization
        for(i = 0; i < JIT_MATRIX_MAX_DIMCOUNT; i++)
            x->radius[i] = 0.5;

        jit_functor_distance_radial_recalc(x);
    }

    return (t_jit_object *)x;
}

t_jit_err jit_functor_distance_radial_free(t_jit_functor_distance_radial *x)
{
    return JIT_ERR_NONE;
}

// --------------------------------------------------------------------------

t_jit_err jit_functor_distance_radial_radius(
    t_jit_functor_distance_radial *x, void *attr, long argc, t_atom *argv)
{
    long i;
    double v;
    char changed = FALSE; // changed flag

    if (x) {
        for(i = 0; i < argc && i < JIT_MATRIX_MAX_DIMCOUNT; i++)
        {
            v = jit_atom_getfloat(argv+i);
            if(x->radius[i] != v) {
                x->radius[i] = v;
                changed = TRUE;
            }
        }
        if(changed)
            jit_functor_distance_radial_recalc(x);
        return JIT_ERR_NONE;
    }
    return JIT_ERR_INVALID_PTR;
}

t_jit_err jit_functor_distance_radial_recalc(t_jit_functor_distance_radial *x)
{
    // calculate intermediary values for efficiency
    return JIT_ERR_NONE;
}

// --------------------------------------------------------------------------

long jit_functor_distance_radial_eval_fixed(
    t_jit_functor_distance_radial *x, long dimcount, long *vals)
{
    return jit_functor_eval_fixed_with_float64((t_jit_object *)x,dimcount,vals,
            (t_jit_functor_float64_sig)jit_functor_distance_radial_eval_float64);
}

float jit_functor_distance_radial_eval_float32(
    t_jit_functor_distance_radial *x, long dimcount, float *vals)
{
    return jit_functor_eval_float32_with_float64((t_jit_object *)x,dimcount,vals,
            (t_jit_functor_float64_sig)jit_functor_distance_radial_eval_float64);
}

double jit_functor_distance_radial_eval_float64(
    t_jit_functor_distance_radial *x, long dimcount, double *vals)
{
    long i;
    double rval = 0;

    for (i=0;i<dimcount;i++) {
        rval += (vals[i] > 0 ? vals[i] : -vals[i]) * x->radius[i];
    }

    return rval;
}

// --------------------------------------------------------------------------

Copyright © 2008, Cycling '74