LibGDX: Textured Triangles with SpriteBatch

TexturedTri.java

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
 
public class TexturedTri implements ApplicationListener {
       
       
        public static void main(String[] args) {
                LwjglApplicationConfiguration cfg = new LwjglApplicationConfiguration();
                cfg.title = "atmos";
                cfg.useGL20 = true;
                cfg.width = 480;
                cfg.height = 320;
                new LwjglApplication(new TexturedTri(), cfg);
        }
       
        BitmapFont font;
        SpriteBatch batch;
        OrthographicCamera camera;
        Texture tex;
        TextureRegion reg;
        float[] vertices;
       
        @Override
        public void create() {
                font = new BitmapFont();
                batch = new SpriteBatch();
                camera = new OrthographicCamera();
                tex = new Texture(Gdx.files.internal("data/texture_training_grounds.png"));
                reg = new TextureRegion(tex, 50, 0, 100, 100);
                vertices = createTriangle(reg, 125, 25, 50, 50, Color.WHITE);
        }
       
        protected float[] createTriangle(TextureRegion region, int x, int y, int width, int height, Color color) {
                float w = reg.getRegionWidth();
                float h = reg.getRegionHeight();
               
                float c = color.toFloatBits();
                float u = reg.getU();
                float v = reg.getV();
                float u2 = reg.getU2();
                float v2 = reg.getV2();
               
                return new float[] {
                        x, y, c, u, v,
                        x, y+h, c, u, v2,
                        x+w, y, c, u2, v,
                        x, y, c, u, v
                };
        }
       
 
        @Override
        public void resize(int width, int height) {
                camera.setToOrtho(false, width, height);
                batch.setProjectionMatrix(camera.combined);
        }
 
        @Override
        public void render() {
                Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
               
                batch.begin();
                batch.draw(tex, vertices, 0, vertices.length);
                batch.end();
        }
 
        @Override
        public void pause() {
               
        }
 
        @Override
        public void resume() {
               
        }
 
        @Override
        public void dispose() {
                font.dispose();
                batch.dispose();
        }
}