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#define INKSCAPE_LIVEPATHEFFECT_PARAMETER_RANDOM_CPP
/*
* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "live_effects/parameter/random.h"
#include "live_effects/effect.h"
#include "svg/svg.h"
#include "ui/widget/registered-widget.h"
#include <gtkmm.h>
#include "ui/widget/random.h"
#include "svg/stringstream.h"
#include "verbs.h"
#define noLPERANDOMPARAM_DEBUG
namespace Inkscape {
namespace LivePathEffect {
RandomParam::RandomParam( const Glib::ustring& label, const Glib::ustring& tip,
const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
Effect* effect, gdouble default_value, long default_seed)
: Parameter(label, tip, key, wr, effect)
{
defvalue = default_value;
value = defvalue;
min = -Geom::infinity();
max = Geom::infinity();
integer = false;
defseed = default_seed;
startseed = defseed;
seed = startseed;
}
RandomParam::~RandomParam()
{
}
bool
RandomParam::param_readSVGValue(const gchar * strvalue)
{
double newval, newstartseed;
gchar** stringarray = g_strsplit (strvalue, ";", 2);
unsigned int success = sp_svg_number_read_d(stringarray[0], &newval);
if (success == 1) {
success += sp_svg_number_read_d(stringarray[1], &newstartseed);
if (success == 2) {
param_set_value(newval, static_cast<long>(newstartseed));
} else {
param_set_value(newval, defseed);
}
g_strfreev(stringarray);
return true;
}
g_strfreev(stringarray);
return false;
}
gchar *
RandomParam::param_getSVGValue() const
{
Inkscape::SVGOStringStream os;
os << value << ';' << startseed;
gchar * str = g_strdup(os.str().c_str());
return str;
}
void
RandomParam::param_set_default()
{
param_set_value(defvalue, defseed);
}
void
RandomParam::param_set_value(gdouble val, long newseed)
{
value = val;
if (integer)
value = round(value);
if (value > max)
value = max;
if (value < min)
value = min;
startseed = setup_seed(newseed);
seed = startseed;
}
void
RandomParam::param_set_range(gdouble min, gdouble max)
{
this->min = min;
this->max = max;
}
void
RandomParam::param_make_integer(bool yes)
{
integer = yes;
}
void
RandomParam::resetRandomizer()
{
seed = startseed;
}
Gtk::Widget *
RandomParam::param_newWidget(Gtk::Tooltips * /*tooltips*/)
{
Inkscape::UI::Widget::RegisteredRandom* regrandom = Gtk::manage(
new Inkscape::UI::Widget::RegisteredRandom( param_label,
param_tooltip,
param_key,
*param_wr,
param_effect->getRepr(),
param_effect->getSPDoc() ) );
regrandom->setValue(value, startseed);
if (integer) {
regrandom->setDigits(0);
regrandom->setIncrements(1, 10);
}
regrandom->setRange(min, max);
regrandom->setProgrammatically = false;
regrandom->set_undo_parameters(SP_VERB_DIALOG_LIVE_PATH_EFFECT, _("Change random parameter"));
return dynamic_cast<Gtk::Widget *> (regrandom);
}
RandomParam::operator gdouble()
{
return rand() * value;
};
/* RNG stolen from /display/nr-filter-turbulence.cpp */
#define RAND_m 2147483647 /* 2**31 - 1 */
#define RAND_a 16807 /* 7**5; primitive root of m */
#define RAND_q 127773 /* m / a */
#define RAND_r 2836 /* m % a */
#define BSize 0x100
long
RandomParam::setup_seed(long lSeed)
{
if (lSeed <= 0) lSeed = -(lSeed % (RAND_m - 1)) + 1;
if (lSeed > RAND_m - 1) lSeed = RAND_m - 1;
return lSeed;
}
// generates random number between 0 and 1
gdouble
RandomParam::rand()
{
long result;
result = RAND_a * (seed % RAND_q) - RAND_r * (seed / RAND_q);
if (result <= 0) result += RAND_m;
seed = result;
gdouble dresult = (gdouble)(result % BSize) / BSize;
return dresult;
}
} /* namespace LivePathEffect */
} /* namespace Inkscape */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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