Revision 05fa94d9
Added by Leszek Koltunski almost 5 years ago
| src/main/java/org/distorted/magic/RubikCube.java | ||
|---|---|---|
| 53 | 53 |
private static final Static3D VectY = new Static3D(0,1,0); |
| 54 | 54 |
private static final Static3D VectZ = new Static3D(0,0,1); |
| 55 | 55 |
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private static final float SQ2 = 0.5f*((float)Math.sqrt(2)); |
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private static final float[] LEGAL = { 0.0f , 0.5f , -0.5f , 1.0f , -1.0f , SQ2 , -SQ2 };
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public static final int VECTX = 0; // |
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public static final int VECTY = 1; // don't change this |
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public static final int VECTZ = 2; // |
| ... | ... | |
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} |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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boolean isSolved() |
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{
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Static4D q = mQuatScramble[0][0][0]; |
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float x = q.get1(); |
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float y = q.get2(); |
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float z = q.get3(); |
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float w = q.get4(); |
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for(int i = 0; i< mSize; i++) |
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for(int j = 0; j< mSize; j++) |
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for(int k = 0; k< mSize; k++) |
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{
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if( i==0 || i==mSize-1 || j==0 || j==mSize-1 || k==0 || k==mSize-1 ) |
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{
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q = mQuatScramble[i][j][k]; |
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if( q.get1()!=x || q.get2()!=y || q.get3()!=z || q.get4()!=w ) |
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{
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return false; |
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} |
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} |
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} |
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return true; |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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public void apply(Effect effect, int position) |
| ... | ... | |
| 498 | 530 |
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mRotationAngle[x][y][z].removeAll(); |
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mQuatScramble[x][y][z].set(RubikSurfaceView.quatMultiply(quat,mQuatScramble[x][y][z])); |
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normalizeScrambleQuat(x,y,z); |
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modifyCurrentPosition(x,y,z,quat); |
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} |
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} |
| ... | ... | |
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mRotationAngleStatic.set1(0); |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// All legal rotation quats must have all four of their components equal to either |
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// 0, 1, -1, 0.5, -0.5 or +-sqrt(2)/2. |
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// |
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// Because of quatMultiplication, errors can accumulate - so to avoid this, we |
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// correct the value of the 'scramble' quat to what it should be. |
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// |
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// We also have to remember that the group of unit quaternions is a double-cover of rotations |
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// in 3D ( q represents the same rotation as -q ) - so invert if needed. |
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private void normalizeScrambleQuat(int i, int j, int k) |
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{
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Static4D quat = mQuatScramble[i][j][k]; |
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float x = quat.get1(); |
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float y = quat.get2(); |
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float z = quat.get3(); |
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float w = quat.get4(); |
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float diff; |
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for(int legal=0; legal<LEGAL.length; legal++) |
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{
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diff = x-LEGAL[legal]; |
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if( diff*diff<0.01f ) x = LEGAL[legal]; |
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diff = y-LEGAL[legal]; |
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if( diff*diff<0.01f ) y = LEGAL[legal]; |
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diff = z-LEGAL[legal]; |
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if( diff*diff<0.01f ) z = LEGAL[legal]; |
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diff = w-LEGAL[legal]; |
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if( diff*diff<0.01f ) w = LEGAL[legal]; |
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} |
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if( w<0 ) |
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{
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w = -w; |
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z = -z; |
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y = -y; |
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x = -x; |
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} |
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else if( w==0 ) |
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{
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if( z<0 ) |
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{
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z = -z; |
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y = -y; |
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x = -x; |
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} |
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else if( z==0 ) |
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{
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if( y<0 ) |
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{
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y = -y; |
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x = -x; |
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} |
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else if( y==0 ) |
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{
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if( x<0 ) |
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{
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x = -x; |
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} |
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} |
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} |
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} |
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mQuatScramble[i][j][k].set(x,y,z,w); |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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private float getSinkStrength() |
| src/main/java/org/distorted/magic/RubikRenderer.java | ||
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private int mNextCubeSize, mScrambleCubeNum; |
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private long mRotationFinishedID; |
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private long[] mEffectID; |
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private boolean mFinishRotation, mRemoveRotation, mFinishDragCurrent, mFinishDragAccumulated;
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private boolean mFinishRotation, mRemoveRotation, mSetQuatCurrent, mSetQuatAccumulated;
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private boolean mSizeChangeCube, mSolveCube, mScrambleCube; |
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private boolean mCanRotate, mCanDrag, mCanUI; |
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private RubikCube mOldCube, mNewCube; |
| ... | ... | |
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mScreenWidth = mScreenHeight = 0; |
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mScrambleCubeNum = 0; |
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mFinishRotation = false;
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mRemoveRotation = false;
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mFinishDragCurrent = false;
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mFinishDragAccumulated = false;
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mSizeChangeCube = false;
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mSolveCube = false;
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mScrambleCube = false;
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mFinishRotation = false; |
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mRemoveRotation = false; |
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mSetQuatCurrent = false;
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mSetQuatAccumulated = false;
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mSizeChangeCube = true;
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mSolveCube = false; |
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mScrambleCube = false; |
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mCanRotate = true; |
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mCanDrag = true; |
| ... | ... | |
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mEffectID = new long[BaseEffect.Type.LENGTH]; |
| 84 | 84 |
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mMesh= new MeshFlat(20,20); |
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mNextCubeSize =RubikActivity.getSize(); |
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mNextCubeSize = RubikActivity.getSize();
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} |
| 88 | 88 |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
| ... | ... | |
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{
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mScreen.render( System.currentTimeMillis() ); |
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if( mFinishDragCurrent )
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if( mSetQuatCurrent )
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{
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mFinishDragCurrent = false;
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mSetQuatCurrent = false;
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mView.setQuatCurrent(); |
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} |
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if( mFinishDragAccumulated )
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if( mSetQuatAccumulated )
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{
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mFinishDragAccumulated = false;
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mSetQuatAccumulated = false;
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mView.setQuatAccumulated(); |
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} |
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|
| ... | ... | |
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{
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mRemoveRotation=false; |
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mNewCube.removeRotationNow(); |
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if( mNewCube.isSolved() ) |
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{
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android.util.Log.e("renderer", "CUBE IS SOLVED NOW");
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} |
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mCanRotate = true; |
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} |
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|
| ... | ... | |
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mCanDrag = false; |
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mCanRotate = false; |
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createCubeNow(mNextCubeSize); |
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doEffectNow(0);
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doEffectNow( BaseEffect.Type.SIZECHANGE );
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} |
| 132 | 138 |
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if( mSolveCube ) |
| ... | ... | |
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mCanDrag = false; |
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mCanRotate = false; |
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mCanUI = false; |
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doEffectNow(1);
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doEffectNow( BaseEffect.Type.SOLVE );
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} |
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if( mScrambleCube ) |
| ... | ... | |
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mCanDrag = false; |
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mCanRotate = false; |
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mCanUI = false; |
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doEffectNow(2);
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doEffectNow( BaseEffect.Type.SCRAMBLE );
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} |
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} |
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|
| ... | ... | |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// do all 'adjustable' effects (SizeChange, Solve, Scramble) |
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private void doEffectNow(int index)
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private void doEffectNow(BaseEffect.Type type)
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{
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mEffectID[index] = BaseEffect.Type.getType(index).startEffect(this); |
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int index = type.ordinal(); |
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mEffectID[index] = type.startEffect(this); |
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if( mEffectID[index] == -1 ) |
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{
|
| ... | ... | |
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void setQuatCurrentOnNextRender() |
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{
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mFinishDragCurrent = true;
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mSetQuatCurrent = true;
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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void setQuatAccumulatedOnNextRender() |
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{
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mFinishDragAccumulated = true;
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mSetQuatAccumulated = true;
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} |
| 373 | 381 |
} |
Also available in: Unified diff
RubikCube: detect if the cube is solved.
In order to do this correctly, we also needed to keep correcting each mQuatScramble quaternions after each quatMultiplication in order to avoid multiplication errors accumulating. This turns out to be easy, because each quaternion representing a legal combination of rotations of a RubikCube must have each of the 4 to its components be equal to one of only 7 possible floats.