commit ed32e32de94e5aa66cbb0946e2efcd37feb6bef7 Author: Leszek Koltunski Date: Sat Apr 2 11:31:27 2022 +0200 Bandaged 3x3: Minor diff --git a/src/main/java/org/distorted/bandaged/BandagedCreatorActivity.java b/src/main/java/org/distorted/bandaged/BandagedCreatorActivity.java index e13535be..3dbc94a5 100644 --- a/src/main/java/org/distorted/bandaged/BandagedCreatorActivity.java +++ b/src/main/java/org/distorted/bandaged/BandagedCreatorActivity.java @@ -28,7 +28,6 @@ import android.util.DisplayMetrics; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; -import android.widget.HorizontalScrollView; import android.widget.LinearLayout; import androidx.appcompat.app.AppCompatActivity; diff --git a/src/main/java/org/distorted/bandaged/BandagedCreatorTouchControl.java b/src/main/java/org/distorted/bandaged/BandagedCreatorTouchControl.java new file mode 100644 index 00000000..7644a32f --- /dev/null +++ b/src/main/java/org/distorted/bandaged/BandagedCreatorTouchControl.java @@ -0,0 +1,259 @@ +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Copyright 2022 Leszek Koltunski // +// // +// This file is part of Magic Cube. // +// // +// Magic Cube is free software: you can redistribute it and/or modify // +// it under the terms of the GNU General Public License as published by // +// the Free Software Foundation, either version 2 of the License, or // +// (at your option) any later version. // +// // +// Magic Cube is distributed in the hope that it will be useful, // +// but WITHOUT ANY WARRANTY; without even the implied warranty of // +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // +// GNU General Public License for more details. // +// // +// You should have received a copy of the GNU General Public License // +// along with Magic Cube. If not, see . // +/////////////////////////////////////////////////////////////////////////////////////////////////// + +package org.distorted.bandaged; + +import org.distorted.library.main.QuatHelper; +import org.distorted.library.type.Static3D; +import org.distorted.library.type.Static4D; +import org.distorted.objectlib.touchcontrol.TouchControlHexahedron; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +public class BandagedCreatorTouchControl +{ + private static final float DIST3D = 0.5f; + private static final float DIST2D = 0.5f; + + private final Static4D CAMERA_POINT; + private final BandagedCubit[] mCubits; + private final int mNumCubits; + private final float[] mPoint, mCamera, mTouch, mPos; + private final float[] mPoint2D; + private float mObjectRatio; + private int mLastTouchedFace; + private final Static3D[] mFaceAxis; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private boolean isInsideFace(float[] p) + { + return ( p[0]<=DIST2D && p[0]>=-DIST2D && p[1]<=DIST2D && p[1]>=-DIST2D ); + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Convert the 3D point3D into a 2D point on the same face surface, but in a different +// coordinate system: a in-plane 2D coord where the origin is in the point where the axis intersects +// the surface, and whose Y axis points 'north' i.e. is in the plane given by the 3D origin, the +// original 3D Y axis and our 2D in-plane origin. +// If those 3 points constitute a degenerate triangle which does not define a plane - which can only +// happen if axis is vertical (or in theory when 2D origin and 3D origin meet, but that would have to +// mean that the distance between the center of the Object and its faces is 0) - then we arbitrarily +// decide that 2D Y = (0,0,-1) in the North Pole and (0,0,1) in the South Pole) +// (ax,ay,az) - vector normal to the face surface. + + void convertTo2Dcoords(float[] point3D, float ax, float ay, float az , float[] output) + { + float y0,y1,y2; // base Y vector of the 2D coord system + + if( ax==0.0f && az==0.0f ) + { + y0=0; y1=0; y2=-ay; + } + else if( ay==0.0f ) + { + y0=0; y1=1; y2=0; + } + else + { + float norm = (float)(-ay/Math.sqrt(1-ay*ay)); + y0 = norm*ax; y1= norm*(ay-1/ay); y2=norm*az; + } + + float x0 = y1*az - y2*ay; // + float x1 = y2*ax - y0*az; // (2D coord baseY) x (axis) = 2D coord baseX + float x2 = y0*ay - y1*ax; // + + float originAlpha = point3D[0]*ax + point3D[1]*ay + point3D[2]*az; + + float origin0 = originAlpha*ax; // coords of the point where axis + float origin1 = originAlpha*ay; // intersects surface plane i.e. + float origin2 = originAlpha*az; // the origin of our 2D coord system + + float v0 = point3D[0] - origin0; + float v1 = point3D[1] - origin1; + float v2 = point3D[2] - origin2; + + output[0] = v0*x0 + v1*x1 + v2*x2; + output[1] = v0*y0 + v1*y1 + v2*y2; + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// +// given precomputed mCamera and mPoint, respectively camera and touch point positions in ScreenSpace, +// compute point 'output[]' which: +// 1) lies on a face of the Object, i.e. surface defined by (axis, distance from (0,0,0)) +// 2) is co-linear with mCamera and mPoint +// +// output = camera + alpha*(point-camera), where alpha = [dist-axis*camera] / [axis*(point-camera)] + + private void castTouchPointOntoFace(int index, float[] output) + { + Static3D faceAxis = mFaceAxis[index]; + + float d0 = mPoint[0]-mCamera[0]; + float d1 = mPoint[1]-mCamera[1]; + float d2 = mPoint[2]-mCamera[2]; + float a0 = faceAxis.get0(); + float a1 = faceAxis.get1(); + float a2 = faceAxis.get2(); + + float denom = a0*d0 + a1*d1 + a2*d2; + + if( denom != 0.0f ) + { + float axisCam = a0*mCamera[0] + a1*mCamera[1] + a2*mCamera[2]; + float alpha = (DIST3D-axisCam)/denom; + + output[0] = mCamera[0] + d0*alpha; + output[1] = mCamera[1] + d1*alpha; + output[2] = mCamera[2] + d2*alpha; + } + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private boolean faceIsVisible(int index) + { + Static3D faceAxis = mFaceAxis[index]; + float castCameraOnAxis = mCamera[0]*faceAxis.get0() + mCamera[1]*faceAxis.get1() + mCamera[2]*faceAxis.get2(); + return castCameraOnAxis > DIST3D; + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private boolean objectTouched(Static4D rotatedTouchPoint, Static4D rotatedCamera) + { + mPoint[0] = rotatedTouchPoint.get0()/mObjectRatio; + mPoint[1] = rotatedTouchPoint.get1()/mObjectRatio; + mPoint[2] = rotatedTouchPoint.get2()/mObjectRatio; + + mCamera[0] = rotatedCamera.get0()/mObjectRatio; + mCamera[1] = rotatedCamera.get1()/mObjectRatio; + mCamera[2] = rotatedCamera.get2()/mObjectRatio; + + for( mLastTouchedFace=0; mLastTouchedFace<6; mLastTouchedFace++) + { + if( faceIsVisible(mLastTouchedFace) ) + { + castTouchPointOntoFace(mLastTouchedFace, mTouch); + + float ax = mFaceAxis[mLastTouchedFace].get0(); + float ay = mFaceAxis[mLastTouchedFace].get1(); + float az = mFaceAxis[mLastTouchedFace].get2(); + + convertTo2Dcoords(mTouch, ax,ay,az, mPoint2D); + if( isInsideFace(mPoint2D) ) return true; + } + } + + return false; + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private void computePosition(int face, float pointX, float pointY) + { + int x = (int)(3*pointX+1.5f) -1; + int y = (int)(3*pointY+1.5f) -1; + + switch(face) + { + case 0: mPos[0] = 1.0f; mPos[1] = y; mPos[2] = -x; break; + case 1: mPos[0] =-1.0f; mPos[1] = y; mPos[2] = x; break; + case 2: mPos[0] = x; mPos[1] = 1.0f; mPos[2] = -y; break; + case 3: mPos[0] = x; mPos[1] =-1.0f; mPos[2] = y; break; + case 4: mPos[0] = x; mPos[1] = y; mPos[2] = 1.0f; break; + case 5: mPos[0] = -x; mPos[1] = y; mPos[2] =-1.0f; break; + } + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private int whichCubitTouched(int face, float pointX, float pointY) + { + computePosition(face,pointX,pointY); + + for(int c=0; c. // -/////////////////////////////////////////////////////////////////////////////////////////////////// - -package org.distorted.bandaged; - -import org.distorted.library.main.QuatHelper; -import org.distorted.library.type.Static3D; -import org.distorted.library.type.Static4D; -import org.distorted.objectlib.touchcontrol.TouchControlHexahedron; - -/////////////////////////////////////////////////////////////////////////////////////////////////// - -public class BandagedTouchControl -{ - private static final float DIST3D = 0.5f; - private static final float DIST2D = 0.5f; - - private final Static4D CAMERA_POINT; - private final BandagedCubit[] mCubits; - private final int mNumCubits; - private final float[] mPoint, mCamera, mTouch, mPos; - private final float[] mPoint2D; - private float mObjectRatio; - private int mLastTouchedFace; - private final Static3D[] mFaceAxis; - -/////////////////////////////////////////////////////////////////////////////////////////////////// - - private boolean isInsideFace(float[] p) - { - return ( p[0]<=DIST2D && p[0]>=-DIST2D && p[1]<=DIST2D && p[1]>=-DIST2D ); - } - -/////////////////////////////////////////////////////////////////////////////////////////////////// -// Convert the 3D point3D into a 2D point on the same face surface, but in a different -// coordinate system: a in-plane 2D coord where the origin is in the point where the axis intersects -// the surface, and whose Y axis points 'north' i.e. is in the plane given by the 3D origin, the -// original 3D Y axis and our 2D in-plane origin. -// If those 3 points constitute a degenerate triangle which does not define a plane - which can only -// happen if axis is vertical (or in theory when 2D origin and 3D origin meet, but that would have to -// mean that the distance between the center of the Object and its faces is 0) - then we arbitrarily -// decide that 2D Y = (0,0,-1) in the North Pole and (0,0,1) in the South Pole) -// (ax,ay,az) - vector normal to the face surface. - - void convertTo2Dcoords(float[] point3D, float ax, float ay, float az , float[] output) - { - float y0,y1,y2; // base Y vector of the 2D coord system - - if( ax==0.0f && az==0.0f ) - { - y0=0; y1=0; y2=-ay; - } - else if( ay==0.0f ) - { - y0=0; y1=1; y2=0; - } - else - { - float norm = (float)(-ay/Math.sqrt(1-ay*ay)); - y0 = norm*ax; y1= norm*(ay-1/ay); y2=norm*az; - } - - float x0 = y1*az - y2*ay; // - float x1 = y2*ax - y0*az; // (2D coord baseY) x (axis) = 2D coord baseX - float x2 = y0*ay - y1*ax; // - - float originAlpha = point3D[0]*ax + point3D[1]*ay + point3D[2]*az; - - float origin0 = originAlpha*ax; // coords of the point where axis - float origin1 = originAlpha*ay; // intersects surface plane i.e. - float origin2 = originAlpha*az; // the origin of our 2D coord system - - float v0 = point3D[0] - origin0; - float v1 = point3D[1] - origin1; - float v2 = point3D[2] - origin2; - - output[0] = v0*x0 + v1*x1 + v2*x2; - output[1] = v0*y0 + v1*y1 + v2*y2; - } - -/////////////////////////////////////////////////////////////////////////////////////////////////// -// given precomputed mCamera and mPoint, respectively camera and touch point positions in ScreenSpace, -// compute point 'output[]' which: -// 1) lies on a face of the Object, i.e. surface defined by (axis, distance from (0,0,0)) -// 2) is co-linear with mCamera and mPoint -// -// output = camera + alpha*(point-camera), where alpha = [dist-axis*camera] / [axis*(point-camera)] - - private void castTouchPointOntoFace(int index, float[] output) - { - Static3D faceAxis = mFaceAxis[index]; - - float d0 = mPoint[0]-mCamera[0]; - float d1 = mPoint[1]-mCamera[1]; - float d2 = mPoint[2]-mCamera[2]; - float a0 = faceAxis.get0(); - float a1 = faceAxis.get1(); - float a2 = faceAxis.get2(); - - float denom = a0*d0 + a1*d1 + a2*d2; - - if( denom != 0.0f ) - { - float axisCam = a0*mCamera[0] + a1*mCamera[1] + a2*mCamera[2]; - float alpha = (DIST3D-axisCam)/denom; - - output[0] = mCamera[0] + d0*alpha; - output[1] = mCamera[1] + d1*alpha; - output[2] = mCamera[2] + d2*alpha; - } - } - -/////////////////////////////////////////////////////////////////////////////////////////////////// - - private boolean faceIsVisible(int index) - { - Static3D faceAxis = mFaceAxis[index]; - float castCameraOnAxis = mCamera[0]*faceAxis.get0() + mCamera[1]*faceAxis.get1() + mCamera[2]*faceAxis.get2(); - return castCameraOnAxis > DIST3D; - } - -/////////////////////////////////////////////////////////////////////////////////////////////////// - - private boolean objectTouched(Static4D rotatedTouchPoint, Static4D rotatedCamera) - { - mPoint[0] = rotatedTouchPoint.get0()/mObjectRatio; - mPoint[1] = rotatedTouchPoint.get1()/mObjectRatio; - mPoint[2] = rotatedTouchPoint.get2()/mObjectRatio; - - mCamera[0] = rotatedCamera.get0()/mObjectRatio; - mCamera[1] = rotatedCamera.get1()/mObjectRatio; - mCamera[2] = rotatedCamera.get2()/mObjectRatio; - - for( mLastTouchedFace=0; mLastTouchedFace<6; mLastTouchedFace++) - { - if( faceIsVisible(mLastTouchedFace) ) - { - castTouchPointOntoFace(mLastTouchedFace, mTouch); - - float ax = mFaceAxis[mLastTouchedFace].get0(); - float ay = mFaceAxis[mLastTouchedFace].get1(); - float az = mFaceAxis[mLastTouchedFace].get2(); - - convertTo2Dcoords(mTouch, ax,ay,az, mPoint2D); - if( isInsideFace(mPoint2D) ) return true; - } - } - - return false; - } - -/////////////////////////////////////////////////////////////////////////////////////////////////// - - private void computePosition(int face, float pointX, float pointY) - { - int x = (int)(3*pointX+1.5f) -1; - int y = (int)(3*pointY+1.5f) -1; - - switch(face) - { - case 0: mPos[0] = 1.0f; mPos[1] = y; mPos[2] = -x; break; - case 1: mPos[0] =-1.0f; mPos[1] = y; mPos[2] = x; break; - case 2: mPos[0] = x; mPos[1] = 1.0f; mPos[2] = -y; break; - case 3: mPos[0] = x; mPos[1] =-1.0f; mPos[2] = y; break; - case 4: mPos[0] = x; mPos[1] = y; mPos[2] = 1.0f; break; - case 5: mPos[0] = -x; mPos[1] = y; mPos[2] =-1.0f; break; - } - } - -/////////////////////////////////////////////////////////////////////////////////////////////////// - - private int whichCubitTouched(int face, float pointX, float pointY) - { - computePosition(face,pointX,pointY); - - for(int c=0; c