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examples / src / main / java / org / distorted / examples / aroundtheworld / AroundTheWorldSurfaceViewPicker.java @ 951c4af9

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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Leszek Koltunski                                                               //
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//                                                                                               //
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// This file is part of Distorted.                                                               //
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//                                                                                               //
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// Distorted is free software: you can redistribute it and/or modify                             //
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// it under the terms of the GNU General Public License as published by                          //
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// the Free Software Foundation, either version 2 of the License, or                             //
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// (at your option) any later version.                                                           //
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//                                                                                               //
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// Distorted is distributed in the hope that it will be useful,                                  //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //
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// GNU General Public License for more details.                                                  //
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//                                                                                               //
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// You should have received a copy of the GNU General Public License                             //
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// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.examples.aroundtheworld;
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import android.content.Context;
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import android.opengl.GLSurfaceView;
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import android.os.Build;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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class AroundTheWorldSurfaceViewPicker extends GLSurfaceView
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{
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    private AroundTheWorldRendererPicker mRenderer;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    public AroundTheWorldSurfaceViewPicker(Context c, AttributeSet attrs)
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      {
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      super(c, attrs);
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      if(!isInEditMode())
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        {
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        setEGLContextClientVersion(2);
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        if( Build.FINGERPRINT.startsWith("generic") )
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          {
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          setEGLConfigChooser(8, 8, 8, 8, 16, 0);
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          }
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        mRenderer = new AroundTheWorldRendererPicker();
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        setRenderer(mRenderer);
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        }
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    public AroundTheWorldRendererPicker getRenderer()
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      {
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      return mRenderer;
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    @Override public boolean onTouchEvent(MotionEvent event)
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      {
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      int x = (int)event.getX();
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      int y = (int)event.getY();
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      int h = mRenderer.getHeight();
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      int w = mRenderer.getWidth();
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      float xf = (x-w/2)*3.0f/h;
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      float yf =-(y-h/2)*3.0f/h;
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      if( yf>-1.5f && yf<1.5f )
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        {
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        if( yf>=0 && yf> 1-0.577f*xf )
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          {
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          float d = 0.577f*xf + yf;
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          yf /= d;
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          xf /= d;
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          }
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        else if( yf<=0 && yf< 0.577f*xf-1 )
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          {
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          float d = 0.577f*xf - yf;
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          yf /= d;
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          xf /= d;
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          }
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        else if( xf< -0.865f )
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          {
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          yf *= (-0.865f/xf);
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          xf  =  -0.865f;
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          }
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        mRenderer.move(xf,yf);
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        }
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      return true;
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      }
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}
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