SampleFPS.java

package com.valkryst.VTerminal.samples;

import com.valkryst.VTerminal.Panel;
import com.valkryst.VTerminal.builder.PanelBuilder;
import com.valkryst.VTerminal.font.Font;
import com.valkryst.VTerminal.font.FontLoader;

import java.awt.*;
import java.io.IOException;
import java.net.URISyntaxException;

public class SampleFPS {
    public static void main(final String[] args) throws IOException, URISyntaxException, InterruptedException {
        final Font font = FontLoader.loadFontFromJar("Fonts/DejaVu Sans Mono/18pt/bitmap.png", "Fonts/DejaVu Sans Mono/18pt/data.fnt", 1);

        final PanelBuilder builder = new PanelBuilder();
        builder.setFont(font);

        final Panel panel = builder.build();

        int temp = 45;

        int measurements = 0;
        long avgMs = 0;
        long elapsedTime = 0;

        while (true) {
            long start = System.nanoTime();
            panel.getScreen().clear((char) temp);
            panel.getScreen().setForegroundColor(new Color(255, 155, temp, 255));
            panel.getScreen().setBackgroundColor(new Color(temp, 155, 255, 255));
            panel.draw();
            long end = System.nanoTime();
            long totalMs = (end - start) / 1000 / 1000;
            elapsedTime += totalMs;
            avgMs = (avgMs * measurements + totalMs) / ++measurements;
            if(measurements % 10 == 0) {
                System.out.println(String.format("Current FPS is: '%d'. Elapsed time: '%d' seconds. Measurements: %d.",
                        1000 / avgMs,
                        elapsedTime / 1000,
                        measurements));
            }
            temp++;

            if (temp > 55) {
                temp = 45;
            }
        }
    }
}