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/* FreeJ example scripts
* (c) Copyright 2008 Christoph Rudorff aka MrGoil <goil@dyne.org>
*
* This source code is free software; you can redistribute it and/or
* modify it under the terms of the GNU Public License as published
* by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* This source code 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.
* Please refer to the GNU Public License for more details.
*
* You should have received a copy of the GNU Public License along with
* this source code; if not, write to:
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* a nice helper to set script values with controler values
automagicly check ranges and sets values by name in the caller context
*/
function Param(obj, name, in_min, in_max, out_min, out_max, out_start_value) {
if (arguments.length != 7)
throw "Wrong no of Args.";
if ( (out_max-out_min == 0) || (in_max-in_min == 0))
throw "Argument value error";
this.frac = 0; // default output Integer
this.obj = obj;
this.name = name;
this.in_min = in_min;
this.in_max = in_max;
this.out_min = out_min;
this.out_max = out_max;
this.out_value = Math.round(out_start_value);
obj[name] = out_start_value;
this.mult = (out_max-out_min)/(in_max-in_min);
this.in_value = Math.int((this.out_value -this.out_min)/this.mult + this.in_min);
}
Param.prototype.setValue = function(in_value) {
in_value = this.range(Math.int(in_value));
var out_value = (this.mult*(in_value-this.in_min) + this.out_min).round(this.frac);
this.obj[this.name] = out_value;
this.in_value = in_value;
this.out_value= out_value;
// echo(this.name + "in: " + in_value + " out: " + this.out_value);
}
Param.prototype.step = function(n) {
// if this.mult<1 ...
var in_value = this.range(this.in_value + n);
this.setValue(in_value);
}
Param.prototype.range = function(v) {
return Math.min(this.in_max, Math.max(this.in_min, v));
}
Param.prototype.print = function(textlayer) {
if (textlayer instanceof TextLayer) {
var msg = this.name + ": " + this.out_value;
textlayer.print(msg);
} else {
throw("I want a TextLayer!");
}
}
// goodies ... return js_int(!)
Math.int = function(i) {
if (i>0)
return this.floor(i)
else
return this.ceil(i)
}
Number.prototype.int = function() {
return Math.int(this);
}
Number.prototype.round = function(d) {
if (d == 0)
return Math.round(this);
d = Math.pow(10,d);
return Math.round(this*d)/d;
}
echo("param included");
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