Pixel-Composer/scripts/node_FFT/node_FFT.gml

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function Node_FFT(_x, _y, _group = noone) : Node_Processor(_x, _y, _group) constructor {
name = "FFT";
previewable = false;
w = 96;
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h = 72;
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min_h = h;
inputs[| 0] = nodeValue("Data", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [])
.setArrayDepth(1)
.setVisible(true, true);
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inputs[| 1] = nodeValue("Preprocess Function", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 0)
.setDisplay(VALUE_DISPLAY.enum_scroll, [ "None", "Hann" ]);
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outputs[| 0] = nodeValue("Array", self, JUNCTION_CONNECT.output, VALUE_TYPE.float, [])
.setArrayDepth(1);
static process_data = function(_outSurf, _data, _output_index, _array_index) {
var _dat = _data[0];
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var _pre = _data[1];
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var _cmp = [];
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var N = array_length(_dat);
for( var i = 0; i < N; i++ ) {
var val = _dat[i];
if(_pre == 1) val = 0.5 * (1 - cos(2 * pi * i / (N - 1)));
_cmp[i] = new Complex(val);
}
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var _res = FFT(_cmp);
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var _r = array_create(array_length(_res));
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for( var i = 0; i < array_length(_res); i++ )
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_r[i] = sqrt(sqr(_res[i].re) + sqr(_res[i].im));
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return _r;
}
static onDrawNode = function(xx, yy, _mx, _my, _s, _hover, _focus) {
var bbox = drawGetBbox(xx, yy, _s);
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draw_sprite_fit(s_node_FFT, 0, bbox.xc, bbox.yc, bbox.w, bbox.h);
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}
}