ofxNaplps

<img src="ofxaddons_thumbnail.png">
Read and write Naplps files in openFrameworks, tested with oF 0.12.1.
Available from https://ofxaddons.com

A port of the Telidon JavaScript library: naplps.js became Naplps.cpp (the decoder and encoder) and TelidonP5.js became Telidon.cpp (the renderer).

Reading

#include "ofxNaplps.h"

Naplps naplps;   // decoder
Telidon telidon; // renderer

void ofApp::setup() {
    naplps.load("shark.nap");
    telidon.setup(naplps, ofGetHeight(), ofGetHeight());
}

void ofApp::update() {
    telidon.update();
}

void ofApp::draw() {
    ofBackground(0);
    telidon.draw();
}

Points live on the NAPLPS unit screen, from (0,0) to (1,1), so pass Telidon a square if you don't want the drawing stretched. By default it draws progressively, one point every 66 milliseconds, the way a Telidon terminal did; telidon.setProgressiveDraw(false) draws the whole thing at once and telidon.reset() starts it over.

The decoded commands are available directly, if you'd rather draw them yourself:

for (NapCmd & cmd : naplps.cmds) {
    ofLogNotice() << cmd.formatCmd("hex");
    // cmd.opcode.opId, cmd.points, cmd.col, cmd.text
}

Writing

NapEncoder encoder;

std::vector<NapInputWrapper> strokes;
strokes.push_back(NapInputWrapper(ofColor::red, points, false)); // color, points, isFill

encoder.encode(strokes, 4); // 4 bytes per coordinate
encoder.save("out.nap");

Example

example/ decodes bin/data/shark.nap and draws it. Arrow keys cycle through the other sample files, space redraws, and you can drop a .nap file on the window.