private boolean processTouch(int action, MotionEvent e, boolean sensorMode) { switch (action) { case MotionEvent.ACTION_DOWN: if (mCurrentTouchState == TouchState.INIT) { mInitX = (int) e.getX(); mInitY = (int) e.getY(); if (sensorMode) { return true; } mCurrentTouchState = TouchState.DRAG_ONE; mPreviousX1 = e.getX(); mPreviousY1 = e.getY(); return true; } case MotionEvent.ACTION_POINTER_DOWN: if (sensorMode) { return true; } if (mCurrentTouchState == TouchState.DRAG_ONE) { mCurrentTouchState = TouchState.DRAG_TWO; mPointerIndex = e.getActionIndex(); mPreviousX1 = e.getX(); mPreviousY1 = e.getY(); mPreviousX2 = e.getX(mPointerIndex); mPreviousY2 = e.getY(mPointerIndex); return true; } case MotionEvent.ACTION_MOVE: if (sensorMode) { return true; } if (mCurrentTouchState == TouchState.DRAG_ONE) { float currentX = e.getX(); float currentY = e.getY(); float deltaX = currentX - mPreviousX1; float deltaY = currentY - mPreviousY1; float radsPerPixel = mStarMapperRenderer.mFovYRad / mStarMapperRenderer.mScreenHeight; changeMapX(-deltaX * radsPerPixel); changeMapY(-deltaY * radsPerPixel); mStarMapperRenderer.mLookX = mUser.getLookX(); mStarMapperRenderer.mLookY = mUser.getLookY(); mStarMapperRenderer.mLookZ = mUser.getLookZ(); mStarMapperRenderer.mUpX = mUser.getNormalX(); mStarMapperRenderer.mUpY = mUser.getNormalY(); mStarMapperRenderer.mUpZ = mUser.getNormalZ(); mPreviousX1 = currentX; mPreviousY1 = currentY; return true; } else if (mCurrentTouchState == TouchState.DRAG_TWO) { float currentX1 = e.getX(); float currentY1 = e.getY(); float currentX2 = e.getX(mPointerIndex); float currentY2 = e.getY(mPointerIndex); float deltaX1 = currentX1 - mPreviousX1; float deltaY1 = currentY1 - mPreviousY1; float deltaX2 = currentX2 - mPreviousX2; float deltaY2 = currentY2 - mPreviousY2; float radsPerPixel = mStarMapperRenderer.mFovYRad / mStarMapperRenderer.mScreenHeight; changeMapX(-((deltaX1 + deltaX2) / 2) * radsPerPixel); changeMapY(-((deltaY1 + deltaY2) / 2) * radsPerPixel); float vPreviousX = mPreviousX1 - mPreviousX2; float vPreviousY = mPreviousY1 - mPreviousY2; float vCurrentX = currentX1 - currentX2; float vCurrentY = currentY1 - currentY2; /* Need a 'stretch' function here for field of view once zoom is implemented */ float vectorRatio = (float) Math.sqrt( (vCurrentX * vCurrentX + vCurrentY * vCurrentY) / (vPreviousX * vPreviousX + vPreviousY * vPreviousY)); mStarMapperRenderer.mFovYRad = mZoomer.zoomBy(mStarMapperRenderer.mFovYRad, 1.0f / vectorRatio); mStarMapperRenderer.mUpdatePerspective = true; double anglePrevious = Math.atan2(vPreviousX, vPreviousY); double angleCurrent = Math.atan2(vCurrentX, vCurrentY); float angleDelta = (float) (anglePrevious - angleCurrent); rotate(angleDelta); mStarMapperRenderer.mLookX = mUser.getLookX(); mStarMapperRenderer.mLookY = mUser.getLookY(); mStarMapperRenderer.mLookZ = mUser.getLookZ(); mStarMapperRenderer.mUpX = mUser.getNormalX(); mStarMapperRenderer.mUpY = mUser.getNormalY(); mStarMapperRenderer.mUpZ = mUser.getNormalZ(); mPreviousX1 = currentX1; mPreviousY1 = currentY1; mPreviousX2 = currentX2; mPreviousY2 = currentY2; return true; } case MotionEvent.ACTION_UP: int last_X = (int) e.getX(); int last_Y = (int) e.getY(); int dx = Math.abs(last_X - mInitX); int dy = Math.abs(last_Y - mInitY); if (dx <= 20 && dy <= 20) { for (Label label : mStarMapperRenderer.mLabelManager.LabelSet) { int xll = label.screenPos_xll; int yll = label.screenPos_yll; int xur = label.screenPos_xur; int yur = label.screenPos_yur; LabelTypeEnum type = label.getType(); if (label.isOnScreen() && xll <= mInitX && xur >= mInitX && yll <= mInitY && yur >= mInitY && type != LabelTypeEnum.GRID) { String name = label.getText().replaceAll(" ", "_"); String URL = "http://en.wikipedia.org/wiki/" + name; if (type == LabelTypeEnum.CONSTELLATION || type == LabelTypeEnum.STAR || type == LabelTypeEnum.PLANET) { URL = URL + "_(" + label.getType().name().toLowerCase() + ")"; } Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(URL)); startActivity(browserIntent); // Toast.makeText(this, label.getText(), Toast.LENGTH_SHORT).show(); } } } if (sensorMode) { return true; } if (mCurrentTouchState != TouchState.INIT) { mCurrentTouchState = TouchState.INIT; return true; } case MotionEvent.ACTION_POINTER_UP: if (sensorMode) { return true; } if (mCurrentTouchState == TouchState.DRAG_TWO) { mCurrentTouchState = TouchState.INIT; } } return false; }