libGDXのSprite座標の謎 ref: http://qiita.com/fslasht/items/d5798516bdbeea49a5d3

file0.java

// テクスチャー読み込み (256x256 px)
img = new Texture("badlogic.jpg");
// スプライト初期化
sprite = new Sprite( new TextureRegion(img,0,0,256,256));
sprite.setSize(256, 256);

file1.java

batch.draw(img, 200, 200);

file10.java

package com.dokokano.gdxviewporttest1;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.BitmapFont.TextBounds;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.utils.Scaling;
import com.badlogic.gdx.utils.viewport.ExtendViewport;
import com.badlogic.gdx.utils.viewport.FitViewport;
import com.badlogic.gdx.utils.viewport.ScalingViewport;
import com.badlogic.gdx.utils.viewport.ScreenViewport;

public class GdxViewportTest extends ApplicationAdapter {

    static final int LOGICAL_WIDTH = 800;       // ゲーム内の論理座標 幅
    static final int LOGICAL_HEIGHT = 600;  // ゲーム内の論理座標 高さ

    Stage stage;    // ViewportとCameraの管理をさせる

    SpriteBatch batch;
    private ShapeRenderer renderer;

    Texture img;
    BitmapFont font;
    private Sprite sprite;

    @Override
    public void create () {
        renderer = new ShapeRenderer();
        batch = new SpriteBatch();
        img = new Texture("badlogic.jpg");  // 256x256 px
        font = new BitmapFont();

        // スプライト初期化
        sprite = new Sprite( new TextureRegion(img,0,0,256,256));
        sprite.setSize(256, 256);

        // Initialite Stage & View port
        stage = new Stage(new FitViewport(LOGICAL_WIDTH,LOGICAL_HEIGHT));
//      stage = new Stage(new ExtendViewport(LOGICAL_WIDTH,LOGICAL_HEIGHT));
//      stage = new Stage(new ScalingViewport(Scaling.fill ,  LOGICAL_WIDTH,LOGICAL_HEIGHT));
//      stage = new Stage(new ScreenViewport());

        Matrix4 cameraMatrix = stage.getViewport().getCamera().combined;
        batch.setProjectionMatrix(cameraMatrix);
        renderer.setProjectionMatrix(cameraMatrix);
    }

    @Override
    public void render () {

        // 背景塗りつぶし（全体を黒）
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);


        // 論理表示領域を青で塗りつぶし
        renderer.begin(ShapeType.Filled);
        renderer.setColor(0,0,0.5f,1);
        renderer.rect(0, 0,LOGICAL_WIDTH,LOGICAL_HEIGHT);
        renderer.end();

        batch.begin();
        // ビットマップ描画(0,0)-(256,256)
//      batch.setColor(1,1,1,0.5f);

//      // 1
//      batch.draw(img, 200, 200);

        // スプライト描画
//      // 2
//      sprite.setPosition(200, 200);
//      sprite.draw(batch);

//      // 3
//      sprite.setPosition(200, 200);
//      sprite.setScale(2);
//      sprite.draw(batch);

//      // 4
//      sprite.setPosition(200, 200);
//      sprite.setRotation(45);
//      sprite.draw(batch);


//      // 5
//      sprite.setPosition(200, 200);
//      sprite.setOrigin(0, 0);
//      sprite.setScale(2);
//      sprite.draw(batch);

        // 6
        sprite.setPosition(200, 200);
        sprite.setOrigin(0, 0);
        sprite.setRotation(45);
        sprite.draw(batch);


        // 100x100グリッドにあわせて座標の数値描画
        for ( int x=-1000; x<=1000; x+=100) {
            for ( int y=-1000; y<1000; y+=100) {
                font.setScale(1f);
                font.setColor(Color.WHITE);
                font.draw(batch, "("+x + ","+y +")" , x, y);
            }
        }

        // bitmap font
        font.setScale(4f);
        font.setColor(Color.RED);
        font.draw(batch,"Font Draw Test!",200,200);

        TextBounds bounds = font.getBounds("Font Draw Test!");
        font.setScale(2f);
        font.setColor(Color.YELLOW);
        font.draw(batch, "TextBounds width:" + bounds.width + " height:" + bounds.height, 200, 50);


        batch.end();

        renderer.begin(ShapeType.Line);
        // 原点からの100pxごとに四角形描画(緑）
        for ( int i=-1000; i<=1000; i+=100 ) {
            renderer.setColor(Color.GREEN);
            renderer.rect(0, 0, i   , i);
        }
        // 100x100グリッドを描画（白いクロス）
        for ( int x=-1000; x<=1000; x+=100) {
            for ( int y=-1000; y<1000; y+=100) {
                renderer.setColor(Color.WHITE);
                renderer.x(x, y, 10);
            }
        }
        renderer.end();


        if (Gdx.input.isTouched()) {
            Vector3 touchPos = new Vector3();
            touchPos.set(Gdx.input.getX(), Gdx.input.getY(), 0);
            stage.getViewport().getCamera().unproject(touchPos);

            renderer.begin(ShapeType.Filled);
            renderer.setColor(Color.RED);
            renderer.circle(touchPos.x, touchPos.y, 50);
            renderer.end();
        }


    }

    @Override
    public void resize(int width, int height) {
        stage.getViewport().update(width, height,true);
    }


}

file2.java

sprite.setPosition(200, 200);
sprite.draw(batch);

file3.java

sprite.setPosition(200, 200);
sprite.setScale(2);
sprite.draw(batch);

file4.java

sprite.setPosition(200, 200);
sprite.setRotation(45);
sprite.draw(batch);

file5.java

sprite.setPosition(200, 200);
sprite.setOrigin(0, 0);
sprite.setScale(2);
sprite.draw(batch);

file6.java

sprite.setPosition(200, 200);
sprite.setOrigin(0, 0);
sprite.setRotation(45);
sprite.draw(batch);

file7.java

font.setScale(1f);
font.setColor(Color.RED);
font.draw(batch,"Font Draw Test!",200,200);

file8.java

font.setScale(4f);
font.setColor(Color.RED);
font.draw(batch,"Font Draw Test!",200,200);

file9.java

font.setScale(4f);
font.setColor(Color.RED);
font.draw(batch,"Font Draw Test!",200,200);

TextBounds bounds = font.getBounds("Font Draw Test!");
font.setScale(2f);
font.setColor(Color.YELLOW);
font.draw(batch, "TextBounds width:" + bounds.width + " height:" + bounds.height, 200, 50);