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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2020 Leszek Koltunski //
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// //
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// This file is part of Magic Cube. //
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// //
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// Magic Cube 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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// Magic Cube 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 Magic Cube. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.tutorial;
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import android.app.ActivityManager;
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import android.content.Context;
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import android.content.pm.ConfigurationInfo;
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import android.opengl.GLES30;
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import android.opengl.GLSurfaceView;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.view.MotionEvent;
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import com.google.firebase.crashlytics.FirebaseCrashlytics;
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import org.distorted.library.type.Static2D;
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import org.distorted.library.type.Static4D;
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import org.distorted.objects.Movement;
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import org.distorted.objects.TwistyObject;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class TutorialSurfaceView extends GLSurfaceView
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{
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private static final int NUM_SPEED_PROBES = 10;
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private static final int INVALID_POINTER_ID = -1;
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// Moving the finger from the middle of the vertical screen to the right edge will rotate a
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// given face by SWIPING_SENSITIVITY/2 degrees.
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private final static int SWIPING_SENSITIVITY = 240;
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// Moving the finger by 0.3 of an inch will start a Rotation.
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private final static float ROTATION_SENSITIVITY = 0.3f;
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private final Static4D CAMERA_POINT = new Static4D(0, 0, 1, 0);
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private TutorialRenderer mRenderer;
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private TutorialPreRender mPreRender;
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private Movement mMovement;
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private boolean mDragging, mBeginningRotation, mContinuingRotation;
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private int mScreenWidth, mScreenHeight, mScreenMin;
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private float mRotAngle, mInitDistance;
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private int mPtrID1, mPtrID2;
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private float mX, mY;
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private float mStartRotX, mStartRotY;
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private float mAxisX, mAxisY;
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private float mRotationFactor;
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private int mCurrentAxis, mCurrentRow;
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private float mCurrentAngle, mCurrRotSpeed;
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private float[] mLastX;
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private float[] mLastY;
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private long[] mLastT;
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private int mFirstIndex, mLastIndex;
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private int mDensity;
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private static Static4D mQuat= new Static4D(-0.25189602f,0.3546389f,0.009657208f,0.90038127f);
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private static Static4D mTemp= new Static4D(0,0,0,1);
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setScreenSize(int width, int height)
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{
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mScreenWidth = width;
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mScreenHeight= height;
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mScreenMin = Math.min(width, height);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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boolean isVertical()
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{
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return mScreenHeight>mScreenWidth;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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TutorialRenderer getRenderer()
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{
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return mRenderer;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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TutorialPreRender getPreRender()
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{
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return mPreRender;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setQuat()
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{
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mQuat.set(mTemp);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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Static4D getQuat()
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{
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return mQuat;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void setMovement(Movement movement)
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{
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mMovement = movement;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private Static4D quatFromDrag(float dragX, float dragY)
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{
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float axisX = dragY; // inverted X and Y - rotation axis is perpendicular to (dragX,dragY)
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float axisY = dragX; // Why not (-dragY, dragX) ? because Y axis is also inverted!
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float axisZ = 0;
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float axisL = (float)Math.sqrt(axisX*axisX + axisY*axisY + axisZ*axisZ);
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if( axisL>0 )
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{
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axisX /= axisL;
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axisY /= axisL;
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axisZ /= axisL;
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float ratio = axisL;
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ratio = ratio - (int)ratio; // the cos() is only valid in (0,Pi)
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float cosA = (float)Math.cos(Math.PI*ratio);
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float sinA = (float)Math.sqrt(1-cosA*cosA);
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return new Static4D(axisX*sinA, axisY*sinA, axisZ*sinA, cosA);
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}
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return new Static4D(0f, 0f, 0f, 1f);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// cast the 3D axis we are currently rotating along (which is already casted to the surface of the
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// currently touched face AND converted into a 4D vector - fourth 0) to a 2D in-screen-surface axis
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private void computeCurrentAxis(Static4D axis)
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{
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Static4D result = rotateVectorByQuat(axis, mQuat);
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mAxisX =result.get0();
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mAxisY =result.get1();
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float len = (float)Math.sqrt(mAxisX*mAxisX + mAxisY*mAxisY);
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mAxisX /= len;
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mAxisY /= len;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// return quat1*quat2
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public static Static4D quatMultiply( Static4D quat1, Static4D quat2 )
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{
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float qx = quat1.get0();
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float qy = quat1.get1();
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float qz = quat1.get2();
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float qw = quat1.get3();
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float rx = quat2.get0();
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float ry = quat2.get1();
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float rz = quat2.get2();
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float rw = quat2.get3();
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float tx = rw*qx - rz*qy + ry*qz + rx*qw;
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float ty = rw*qy + rz*qx + ry*qw - rx*qz;
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float tz = rw*qz + rz*qw - ry*qx + rx*qy;
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float tw = rw*qw - rz*qz - ry*qy - rx*qx;
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return new Static4D(tx,ty,tz,tw);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// rotate 'vector' by quat ( i.e. return quat*vector*(quat^-1) )
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public static Static4D rotateVectorByQuat(Static4D vector, Static4D quat)
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{
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float qx = quat.get0();
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float qy = quat.get1();
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float qz = quat.get2();
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float qw = quat.get3();
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Static4D quatInverted= new Static4D(-qx,-qy,-qz,qw);
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Static4D tmp = quatMultiply(quat,vector);
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return quatMultiply(tmp,quatInverted);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// rotate 'vector' by quat^(-1) ( i.e. return (quat^-1)*vector*quat )
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public static Static4D rotateVectorByInvertedQuat(Static4D vector, Static4D quat)
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{
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float qx = quat.get0();
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float qy = quat.get1();
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float qz = quat.get2();
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float qw = quat.get3();
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Static4D quatInverted= new Static4D(-qx,-qy,-qz,qw);
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Static4D tmp = quatMultiply(quatInverted,vector);
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return quatMultiply(tmp,quat);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void addSpeedProbe(float x, float y)
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{
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long currTime = System.currentTimeMillis();
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boolean theSame = mLastIndex==mFirstIndex;
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mLastIndex++;
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if( mLastIndex>=NUM_SPEED_PROBES ) mLastIndex=0;
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mLastT[mLastIndex] = currTime;
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mLastX[mLastIndex] = x;
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mLastY[mLastIndex] = y;
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if( mLastIndex==mFirstIndex)
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{
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mFirstIndex++;
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if( mFirstIndex>=NUM_SPEED_PROBES ) mFirstIndex=0;
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}
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if( theSame )
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{
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mLastT[mFirstIndex] = currTime;
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mLastX[mFirstIndex] = x;
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mLastY[mFirstIndex] = y;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void computeCurrentSpeedInInchesPerSecond()
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{
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long firstTime = mLastT[mFirstIndex];
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long lastTime = mLastT[mLastIndex];
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float fX = mLastX[mFirstIndex];
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float fY = mLastY[mFirstIndex];
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float lX = mLastX[mLastIndex];
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float lY = mLastY[mLastIndex];
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long timeDiff = lastTime-firstTime;
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mLastIndex = 0;
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mFirstIndex= 0;
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mCurrRotSpeed = timeDiff>0 ? 1000*retFingerDragDistanceInInches(fX,fY,lX,lY)/timeDiff : 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private float retFingerDragDistanceInInches(float xFrom, float yFrom, float xTo, float yTo)
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{
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float xDist = mScreenWidth*(xFrom-xTo);
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float yDist = mScreenHeight*(yFrom-yTo);
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float distInPixels = (float)Math.sqrt(xDist*xDist + yDist*yDist);
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return distInPixels/mDensity;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void setUpDragOrRotate(float x, float y)
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{
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Static4D touchPoint = new Static4D(x, y, 0, 0);
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Static4D rotatedTouchPoint= rotateVectorByInvertedQuat(touchPoint, mQuat);
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Static4D rotatedCamera= rotateVectorByInvertedQuat(CAMERA_POINT, mQuat);
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if( mMovement!=null && mMovement.faceTouched(rotatedTouchPoint,rotatedCamera) )
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{
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mDragging = false;
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mContinuingRotation = false;
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mBeginningRotation = true;
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}
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else
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{
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final TutorialActivity act = (TutorialActivity)getContext();
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mDragging = !act.isLocked();
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mContinuingRotation = false;
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mBeginningRotation = false;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void drag(MotionEvent event, float x, float y)
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{
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if( mPtrID1!=INVALID_POINTER_ID && mPtrID2!=INVALID_POINTER_ID)
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{
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int pointer = event.findPointerIndex(mPtrID2);
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float pX,pY;
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try
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{
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pX = event.getX(pointer);
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pY = event.getY(pointer);
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}
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catch(IllegalArgumentException ex)
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{
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mPtrID1=INVALID_POINTER_ID;
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mPtrID2=INVALID_POINTER_ID;
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FirebaseCrashlytics crashlytics = FirebaseCrashlytics.getInstance();
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crashlytics.setCustomKey("DragError", "pointer="+pointer );
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crashlytics.recordException(ex);
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return;
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}
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float x2 = (pX - mScreenWidth*0.5f)/mScreenMin;
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float y2 = (mScreenHeight*0.5f -pY)/mScreenMin;
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float angleNow = getAngle(x,y,x2,y2);
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float angleDiff = angleNow-mRotAngle;
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float sinA =-(float)Math.sin(angleDiff);
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float cosA = (float)Math.cos(angleDiff);
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Static4D dragQuat = quatMultiply(new Static4D(0,0,sinA,cosA), mQuat);
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mTemp.set(dragQuat);
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mRotAngle = angleNow;
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float distNow = (float)Math.sqrt( (x-x2)*(x-x2) + (y-y2)*(y-y2) );
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float distQuot = mInitDistance<0 ? 1.0f : distNow/ mInitDistance;
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mInitDistance = distNow;
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TwistyObject object = mPreRender.getObject();
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if( object!=null ) object.setObjectRatio(distQuot);
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}
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else
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{
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Static4D dragQuat = quatMultiply(quatFromDrag(mX-x,y-mY), mQuat);
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mTemp.set(dragQuat);
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}
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mPreRender.setQuatOnNextRender();
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mX = x;
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mY = y;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void finishRotation()
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{
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computeCurrentSpeedInInchesPerSecond();
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int angle = mPreRender.getObject().computeNearestAngle(mCurrentAngle, mCurrRotSpeed);
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mPreRender.finishRotation(angle);
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if( angle!=0 )
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{
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final TutorialActivity act = (TutorialActivity)getContext();
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TutorialState state = act.getState();
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state.addMove(mCurrentAxis, mCurrentRow, angle);
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}
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mContinuingRotation = false;
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mBeginningRotation = false;
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mDragging = true;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void continueRotation(float x, float y)
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{
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float dx = x-mStartRotX;
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float dy = y-mStartRotY;
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float alpha = dx*mAxisX + dy*mAxisY;
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float x2 = dx - alpha*mAxisX;
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float y2 = dy - alpha*mAxisY;
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float len = (float)Math.sqrt(x2*x2 + y2*y2);
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// we have the length of 1D vector 'angle', now the direction:
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float tmp = mAxisY==0 ? -mAxisX*y2 : mAxisY*x2;
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float angle = (tmp>0 ? 1:-1)*len*mRotationFactor;
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mCurrentAngle = SWIPING_SENSITIVITY*angle;
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mPreRender.getObject().continueRotation(mCurrentAngle);
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addSpeedProbe(x2,y2);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void beginRotation(float x, float y)
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{
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mStartRotX = x;
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mStartRotY = y;
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TwistyObject object = mPreRender.getObject();
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int numLayers = object.getNumLayers();
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Static4D touchPoint2 = new Static4D(x, y, 0, 0);
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Static4D rotatedTouchPoint2= rotateVectorByInvertedQuat(touchPoint2, mQuat);
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Static2D res = mMovement.newRotation(numLayers,rotatedTouchPoint2);
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mCurrentAxis = (int)res.get0();
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mCurrentRow = (int)res.get1();
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computeCurrentAxis( mMovement.getCastedRotAxis(mCurrentAxis) );
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mRotationFactor = mMovement.returnRotationFactor(numLayers,mCurrentRow);
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object.beginNewRotation( mCurrentAxis, mCurrentRow );
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addSpeedProbe(x,y);
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mBeginningRotation = false;
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mContinuingRotation= true;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private float getAngle(float x1, float y1, float x2, float y2)
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{
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return (float) Math.atan2(y1-y2, x1-x2);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void actionMove(MotionEvent event)
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{
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int pointer = event.findPointerIndex(mPtrID1 != INVALID_POINTER_ID ? mPtrID1:mPtrID2);
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447
|
if( pointer<0 ) return;
|
448
|
|
449
|
float pX = event.getX(pointer);
|
450
|
float pY = event.getY(pointer);
|
451
|
|
452
|
float x = (pX - mScreenWidth*0.5f)/mScreenMin;
|
453
|
float y = (mScreenHeight*0.5f -pY)/mScreenMin;
|
454
|
|
455
|
if( mBeginningRotation )
|
456
|
{
|
457
|
if( retFingerDragDistanceInInches(mX,mY,x,y) > ROTATION_SENSITIVITY )
|
458
|
{
|
459
|
beginRotation(x,y);
|
460
|
}
|
461
|
}
|
462
|
else if( mContinuingRotation )
|
463
|
{
|
464
|
continueRotation(x,y);
|
465
|
}
|
466
|
else if( mDragging )
|
467
|
{
|
468
|
drag(event,x,y);
|
469
|
}
|
470
|
else
|
471
|
{
|
472
|
setUpDragOrRotate(x,y);
|
473
|
}
|
474
|
}
|
475
|
|
476
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
477
|
|
478
|
private void actionDown(MotionEvent event)
|
479
|
{
|
480
|
mPtrID1 = event.getPointerId(0);
|
481
|
|
482
|
float x = event.getX();
|
483
|
float y = event.getY();
|
484
|
|
485
|
mX = (x - mScreenWidth*0.5f)/mScreenMin;
|
486
|
mY = (mScreenHeight*0.5f -y)/mScreenMin;
|
487
|
|
488
|
setUpDragOrRotate(mX,mY);
|
489
|
}
|
490
|
|
491
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
492
|
|
493
|
private void actionUp(MotionEvent event)
|
494
|
{
|
495
|
mPtrID1 = INVALID_POINTER_ID;
|
496
|
mPtrID2 = INVALID_POINTER_ID;
|
497
|
|
498
|
if( mContinuingRotation )
|
499
|
{
|
500
|
finishRotation();
|
501
|
}
|
502
|
}
|
503
|
|
504
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
505
|
|
506
|
private void actionDown2(MotionEvent event)
|
507
|
{
|
508
|
int index = event.getActionIndex();
|
509
|
|
510
|
if( mPtrID1==INVALID_POINTER_ID )
|
511
|
{
|
512
|
mPtrID1 = event.getPointerId(index);
|
513
|
float x = event.getX();
|
514
|
float y = event.getY();
|
515
|
|
516
|
if( mPtrID2 != INVALID_POINTER_ID )
|
517
|
{
|
518
|
int pointer = event.findPointerIndex(mPtrID2);
|
519
|
|
520
|
try
|
521
|
{
|
522
|
float x2 = event.getX(pointer);
|
523
|
float y2 = event.getY(pointer);
|
524
|
|
525
|
mRotAngle = getAngle(x,-y,x2,-y2);
|
526
|
mInitDistance = -1;
|
527
|
}
|
528
|
catch(IllegalArgumentException ex)
|
529
|
{
|
530
|
mPtrID1=INVALID_POINTER_ID;
|
531
|
mPtrID2=INVALID_POINTER_ID;
|
532
|
|
533
|
FirebaseCrashlytics crashlytics = FirebaseCrashlytics.getInstance();
|
534
|
crashlytics.setCustomKey("DragError", "pointer="+pointer );
|
535
|
crashlytics.recordException(ex);
|
536
|
|
537
|
return;
|
538
|
}
|
539
|
}
|
540
|
|
541
|
mX = (x - mScreenWidth*0.5f)/mScreenMin;
|
542
|
mY = (mScreenHeight*0.5f -y)/mScreenMin;
|
543
|
}
|
544
|
else if( mPtrID2==INVALID_POINTER_ID )
|
545
|
{
|
546
|
mPtrID2 = event.getPointerId(index);
|
547
|
|
548
|
float x = event.getX();
|
549
|
float y = event.getY();
|
550
|
|
551
|
if( mPtrID2 != INVALID_POINTER_ID )
|
552
|
{
|
553
|
int pointer = event.findPointerIndex(mPtrID2);
|
554
|
|
555
|
try
|
556
|
{
|
557
|
float x2 = event.getX(pointer);
|
558
|
float y2 = event.getY(pointer);
|
559
|
|
560
|
mRotAngle = getAngle(x,-y,x2,-y2);
|
561
|
mInitDistance = -1;
|
562
|
}
|
563
|
catch(IllegalArgumentException ex)
|
564
|
{
|
565
|
mPtrID1=INVALID_POINTER_ID;
|
566
|
mPtrID2=INVALID_POINTER_ID;
|
567
|
|
568
|
FirebaseCrashlytics crashlytics = FirebaseCrashlytics.getInstance();
|
569
|
crashlytics.setCustomKey("DragError", "pointer="+pointer );
|
570
|
crashlytics.recordException(ex);
|
571
|
|
572
|
return;
|
573
|
}
|
574
|
}
|
575
|
|
576
|
if( mBeginningRotation || mContinuingRotation )
|
577
|
{
|
578
|
mX = (x - mScreenWidth*0.5f)/mScreenMin;
|
579
|
mY = (mScreenHeight*0.5f -y)/mScreenMin;
|
580
|
}
|
581
|
}
|
582
|
|
583
|
if( mBeginningRotation )
|
584
|
{
|
585
|
mContinuingRotation = false;
|
586
|
mBeginningRotation = false;
|
587
|
mDragging = true;
|
588
|
}
|
589
|
else if( mContinuingRotation )
|
590
|
{
|
591
|
finishRotation();
|
592
|
}
|
593
|
}
|
594
|
|
595
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
596
|
|
597
|
private void actionUp2(MotionEvent event)
|
598
|
{
|
599
|
int index = event.getActionIndex();
|
600
|
|
601
|
if( index==event.findPointerIndex(mPtrID1) )
|
602
|
{
|
603
|
mPtrID1 = INVALID_POINTER_ID;
|
604
|
int pointer = event.findPointerIndex(mPtrID2);
|
605
|
|
606
|
if( pointer>=0 )
|
607
|
{
|
608
|
float x1 = event.getX(pointer);
|
609
|
float y1 = event.getY(pointer);
|
610
|
|
611
|
mX = (x1 - mScreenWidth*0.5f)/mScreenMin;
|
612
|
mY = (mScreenHeight*0.5f -y1)/mScreenMin;
|
613
|
}
|
614
|
}
|
615
|
else if( index==event.findPointerIndex(mPtrID2) )
|
616
|
{
|
617
|
mPtrID2 = INVALID_POINTER_ID;
|
618
|
}
|
619
|
}
|
620
|
|
621
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
622
|
|
623
|
void initialize()
|
624
|
{
|
625
|
mPtrID1 = INVALID_POINTER_ID;
|
626
|
mPtrID2 = INVALID_POINTER_ID;
|
627
|
}
|
628
|
|
629
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
630
|
// PUBLIC API
|
631
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
632
|
|
633
|
public TutorialSurfaceView(Context context, AttributeSet attrs)
|
634
|
{
|
635
|
super(context,attrs);
|
636
|
|
637
|
if(!isInEditMode())
|
638
|
{
|
639
|
mCurrRotSpeed= 0.0f;
|
640
|
|
641
|
mLastX = new float[NUM_SPEED_PROBES];
|
642
|
mLastY = new float[NUM_SPEED_PROBES];
|
643
|
mLastT = new long[NUM_SPEED_PROBES];
|
644
|
mFirstIndex =0;
|
645
|
mLastIndex =0;
|
646
|
|
647
|
mRenderer = new TutorialRenderer(this);
|
648
|
mPreRender = new TutorialPreRender(this);
|
649
|
|
650
|
TutorialActivity act = (TutorialActivity)context;
|
651
|
DisplayMetrics dm = new DisplayMetrics();
|
652
|
act.getWindowManager().getDefaultDisplay().getMetrics(dm);
|
653
|
|
654
|
mDensity = dm.densityDpi;
|
655
|
|
656
|
final ActivityManager activityManager= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
|
657
|
|
658
|
try
|
659
|
{
|
660
|
final ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();
|
661
|
int esVersion = configurationInfo.reqGlEsVersion>>16;
|
662
|
setEGLContextClientVersion(esVersion);
|
663
|
setRenderer(mRenderer);
|
664
|
}
|
665
|
catch(Exception ex)
|
666
|
{
|
667
|
act.OpenGLError();
|
668
|
|
669
|
String shading = GLES30.glGetString(GLES30.GL_SHADING_LANGUAGE_VERSION);
|
670
|
String version = GLES30.glGetString(GLES30.GL_VERSION);
|
671
|
String vendor = GLES30.glGetString(GLES30.GL_VENDOR);
|
672
|
String renderer= GLES30.glGetString(GLES30.GL_RENDERER);
|
673
|
|
674
|
FirebaseCrashlytics crashlytics = FirebaseCrashlytics.getInstance();
|
675
|
crashlytics.setCustomKey("GLSL Version" , shading );
|
676
|
crashlytics.setCustomKey("GLversion" , version );
|
677
|
crashlytics.setCustomKey("GL Vendor " , vendor );
|
678
|
crashlytics.setCustomKey("GLSLrenderer" , renderer);
|
679
|
crashlytics.recordException(ex);
|
680
|
}
|
681
|
}
|
682
|
}
|
683
|
|
684
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
685
|
|
686
|
@Override
|
687
|
public boolean onTouchEvent(MotionEvent event)
|
688
|
{
|
689
|
int action = event.getActionMasked();
|
690
|
|
691
|
switch(action)
|
692
|
{
|
693
|
case MotionEvent.ACTION_DOWN : actionDown(event) ; break;
|
694
|
case MotionEvent.ACTION_MOVE : actionMove(event) ; break;
|
695
|
case MotionEvent.ACTION_UP : actionUp(event) ; break;
|
696
|
case MotionEvent.ACTION_POINTER_DOWN: actionDown2(event); break;
|
697
|
case MotionEvent.ACTION_POINTER_UP : actionUp2(event) ; break;
|
698
|
}
|
699
|
|
700
|
return true;
|
701
|
}
|
702
|
}
|
703
|
|