Android Open Source - jmini3d Canvas3d

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License

The source code is released under:

Copyright 2012 Mobialia http://www.mobialia.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to ...

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Java Source Code

package jmini3d.gwt;
/*  w  ww  . j a  va2s.  c o  m*/
import com.google.gwt.animation.client.AnimationScheduler;
import com.google.gwt.canvas.dom.client.Context;
import com.google.gwt.dom.client.Element;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Window;
import com.googlecode.gwtgl.binding.WebGLRenderingContext;

import jmini3d.Scene;
import jmini3d.SceneController;

public class Canvas3d implements AnimationScheduler.AnimationCallback, TextureLoadedListener {

  Element webGLCanvas;
  WebGLRenderingContext gl;

  boolean stopped = false;
  int width, height;
  float scale = 1;

  public Renderer3d renderer3d;
  SceneController sceneController;
  boolean forceRedraw = false;

  public Canvas3d(String resourceLoaderDir) {

    webGLCanvas = DOM.createElement("canvas");
    webGLCanvas.setAttribute("tabindex", "0"); // Workaround to receive key events

    gl = (WebGLRenderingContext) getContext(webGLCanvas, "webgl");
    if (gl == null) {
      gl = (WebGLRenderingContext) getContext(webGLCanvas, "experimental-webgl");
    }
    if (gl == null) {
      Window.alert("Sorry, Your browser doesn't support WebGL. Please install the last version of Firefox, Chrome, Safari, or Internet Explorer and check that WebGL is enabled.");
      return;
    }

    renderer3d = new Renderer3d(gl, new ResourceLoader(resourceLoaderDir), this);
  }

  public final native Context getContext(Element el, String contextId) /*-{
    return el.getContext(contextId);
   }-*/;

  public final native float getDevicePixelRatio() /*-{
     return window.devicePixelRatio || 1;
   }-*/;

  public void setSize(int width, int height) {
    this.width = (int) (width * scale);
    this.height = (int) (height * scale);
    webGLCanvas.setAttribute("width", String.valueOf(this.width));
    webGLCanvas.setAttribute("height", String.valueOf(this.height));
    webGLCanvas.setAttribute("style", "width: " + width + "px; height: " + height + "px;");
    requestRender();
  }

  public void onResume() {
    stopped = false;
    AnimationScheduler.get().requestAnimationFrame(this);
  }

  public void onPause() {
    stopped = true;
  }

  @Override
  public void execute(double timestamp) {
    if (!stopped) {
      if (sceneController != null) {
        if (sceneController.updateScene(width, height) || forceRedraw) {
          Scene scene = sceneController.getScene();
          if (scene != null) {
            forceRedraw = false;
            renderer3d.render(scene);
          }
        }
      }
      AnimationScheduler.get().requestAnimationFrame(this);
    }
  }

  public void requestRender() {
    forceRedraw = true;
  }

  public void setSceneController(SceneController sceneController) {
    this.sceneController = sceneController;
  }

  public Renderer3d getRenderer3d() {
    return renderer3d;
  }

  public Element getElement() {
    return webGLCanvas;
  }

  public void setScale(float scale) {
    this.scale = scale;
  }

  public float getScale() {
    return scale;
  }

  @Override
  public void onTextureLoaded() {
    requestRender();
  }
}

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