/**
 * Copyright (c) 2008-2021 Bird Dog Games, Inc.
 *
 * This file is part of Ardor3D.
 *
 * Ardor3D is free software: you can redistribute it and/or modify it
 * under the terms of its license which may be found in the accompanying
 * LICENSE file or at <https://git.io/fjRmv>.
 */

package com.ardor3d.example.effect;

import com.ardor3d.bounding.BoundingBox;
import com.ardor3d.example.ExampleBase;
import com.ardor3d.example.Purpose;
import com.ardor3d.image.Texture;
import com.ardor3d.input.keyboard.Key;
import com.ardor3d.input.logical.InputTrigger;
import com.ardor3d.input.logical.KeyPressedCondition;
import com.ardor3d.math.Vector3;
import com.ardor3d.math.util.MathUtils;
import com.ardor3d.renderer.state.TextureState;
import com.ardor3d.scenegraph.Node;
import com.ardor3d.scenegraph.extension.QuadImposterNode;
import com.ardor3d.scenegraph.shape.Box;
import com.ardor3d.scenegraph.shape.Teapot;
import com.ardor3d.scenegraph.shape.Torus;
import com.ardor3d.scenegraph.visitor.UpdateModelBoundVisitor;
import com.ardor3d.ui.text.BasicText;
import com.ardor3d.util.TextureManager;

/**
 * A demonstration of the QuadImposterNode class; which sets the texture level of detail for a Node.
 */
@Purpose(
    htmlDescriptionKey = "com.ardor3d.example.effect.QuadImposterExample", //
    thumbnailPath = "com/ardor3d/example/media/thumbnails/effect_QuadImposterExample.jpg", //
    maxHeapMemory = 64)
public class QuadImposterExample extends ExampleBase {
  private boolean showImposter = true;

  public static void main(final String[] args) {
    start(QuadImposterExample.class);
  }

  @Override
  protected void initExample() {
    _canvas.setTitle("Various size imposters - Example");

    _canvas.getCanvasRenderer().getCamera().setLocation(new Vector3(0, 60, 80));
    _canvas.getCanvasRenderer().getCamera().lookAt(new Vector3(), Vector3.UNIT_Y);
    _root.setRenderMaterial("unlit/textured/basic.yaml");

    final BasicText keyText = BasicText.createDefaultTextLabel("Text", "[SPACE] Switch imposters off");
    keyText.setTranslation(new Vector3(0, 20, 0));
    _orthoRoot.attachChild(keyText);

    final Box box = new Box("Box", new Vector3(), 150, 1, 150);
    box.setModelBound(new BoundingBox());
    box.setTranslation(new Vector3(0, -10, 0));
    _root.attachChild(box);

    final QuadImposterNode imposter0 =
        new QuadImposterNode("Imposter1", 512, 512, _settings.getDepthBits(), _settings.getSamples(), _timer);
    imposter0.setRedrawRate(0.0); // No timed update
    imposter0.setCameraAngleThreshold(1.0 * MathUtils.DEG_TO_RAD);
    imposter0.setCameraDistanceThreshold(0.1);
    _root.attachChild(imposter0);

    final Node scene1 = createModel();
    scene1.setTranslation(0, 0, 0);
    imposter0.attachChild(scene1);

    final QuadImposterNode imposter1 =
        new QuadImposterNode("Imposter1", 256, 256, _settings.getDepthBits(), _settings.getSamples(), _timer);
    imposter1.setRedrawRate(0.0); // No timed update
    imposter1.setCameraAngleThreshold(1.0 * MathUtils.DEG_TO_RAD);
    imposter1.setCameraDistanceThreshold(0.1);
    _root.attachChild(imposter1);

    final Node scene2 = createModel();
    scene2.setTranslation(-15, 0, -25);
    imposter1.attachChild(scene2);

    final QuadImposterNode imposter2 =
        new QuadImposterNode("Imposter2", 128, 128, _settings.getDepthBits(), _settings.getSamples(), _timer);
    imposter2.setRedrawRate(0.0); // No timed update
    imposter2.setCameraAngleThreshold(1.0 * MathUtils.DEG_TO_RAD);
    imposter2.setCameraDistanceThreshold(0.1);
    _root.attachChild(imposter2);

    final Node scene3 = createModel();
    scene3.setTranslation(15, 0, -25);
    imposter2.attachChild(scene3);

    _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SPACE), (source, inputStates, tpf) -> {
      showImposter = !showImposter;
      if (showImposter) {
        _root.detachChild(scene1);
        _root.detachChild(scene2);
        _root.detachChild(scene3);
        imposter0.attachChild(scene1);
        imposter1.attachChild(scene2);
        imposter2.attachChild(scene3);
        _root.attachChild(imposter0);
        _root.attachChild(imposter1);
        _root.attachChild(imposter2);

        keyText.setText("[SPACE] Switch imposters off");
      } else {
        _root.detachChild(imposter0);
        _root.detachChild(imposter1);
        _root.detachChild(imposter2);
        _root.attachChild(scene1);
        _root.attachChild(scene2);
        _root.attachChild(scene3);

        keyText.setText("[SPACE] Switch imposters on");
      }
    }));

    final TextureState ts = new TextureState();
    ts.setEnabled(true);
    ts.setTexture(TextureManager.load("images/ardor3d_white_256.jpg", Texture.MinificationFilter.Trilinear, true));

    _root.setRenderState(ts);

    _root.acceptVisitor(new UpdateModelBoundVisitor(), false);
  }

  private Node createModel() {
    final Node node = new Node("Node");

    final Box box = new Box("Box", new Vector3(), 5, 5, 5);
    box.setModelBound(new BoundingBox());
    box.setTranslation(new Vector3(-3, 0, 0));
    box.setRandomColors();
    node.attachChild(box);

    final Teapot teapot = new Teapot("Teapot");
    teapot.setScale(2.0);
    teapot.setTranslation(new Vector3(3, 0, 0));
    node.attachChild(teapot);

    final Torus torus = new Torus("Torus", 128, 128, 2, 4);
    torus.setTranslation(new Vector3(-8, 3, 0));
    node.attachChild(torus);

    return node;
  }
}
