New ofxAddon ofxGpuLutCube

moebiussurfing · February 27, 2020, 11:03pm

openFrameworks addon to apply LUT (Color Lookup Table) filter shader from standard ‘.cube’ files. (sizes 16, 32, 64)

vvzen · March 6, 2020, 10:56pm

Awesome news! I’ve always been looking for something like this. I haven’t yet looked at the code, does the addon support saving the result to a file, too?
Also, I guess you’re using linear interpolation, not tetrahedral, right?

moebiussurfing · March 6, 2020, 11:04pm

cool thanks @vvzen, hope it fits your desired use.

the example is not exporting any processed file. just processing live what you draw between begin/end but could be easy to add to your app.

sorry, but no idea about the used interpolation, maybe you can look into the source files I used, that are linked into the addon info.

moebiussurfing · March 7, 2020, 5:29pm

github.com

youandhubris/GPU-LUT-OpenFrameworks/blob/master/src/ofApp.cpp

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup(){
    
    // Disable rectangle textures
    ofDisableArbTex();
    
    
    // Load the LUT
    vector<RGB> LUT;
    
    LUTpath = ofToDataPath("threshold.CUBE");
    
    ifstream LUTfile(LUTpath.c_str());
    
    while (!LUTfile.eof()) {
        string LUTline;
        getline(LUTfile, LUTline);

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I see some GL LINEAR. Why could be this important for?