18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org) 38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * This library is free software; you can redistribute it and/or 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modify it under the terms of the GNU Library General Public 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * License as published by the Free Software Foundation; either 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * version 2 of the License, or (at your option) any later version. 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * This library is distributed in the hope that it will be useful, 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * but WITHOUT ANY WARRANTY; without even the implied warranty of 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Library General Public License for more details. 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * You should have received a copy of the GNU Library General Public License 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * along with this library; see the file COPYING.LIB. If not, write to 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Boston, MA 02110-1301, USA. 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "RotateTransformOperation.h" 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 258f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include <algorithm> 268f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include <wtf/MathExtras.h> 278f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 288f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qianusing namespace std; 298f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore { 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectPassRefPtr<TransformOperation> RotateTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity) 338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (from && !from->isSameType(*this)) 358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return this; 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (blendToIdentity) 388f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return RotateTransformOperation::create(m_x, m_y, m_z, m_angle - m_angle * progress, m_type); 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const RotateTransformOperation* fromOp = static_cast<const RotateTransformOperation*>(from); 418f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 428f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Optimize for single axis rotation 438f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian if (!fromOp || (fromOp->m_x == 0 && fromOp->m_y == 0 && fromOp->m_z == 1) || 448f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (fromOp->m_x == 0 && fromOp->m_y == 1 && fromOp->m_z == 0) || 458f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (fromOp->m_x == 1 && fromOp->m_y == 0 && fromOp->m_z == 0)) { 468f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian double fromAngle = fromOp ? fromOp->m_angle : 0; 478f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return RotateTransformOperation::create(fromOp ? fromOp->m_x : m_x, 488f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian fromOp ? fromOp->m_y : m_y, 498f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian fromOp ? fromOp->m_z : m_z, 508f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian fromAngle + (m_angle - fromAngle) * progress, m_type); 518f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian } 528f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 538f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian const RotateTransformOperation* toOp = this; 548f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 558f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Create the 2 rotation matrices 568f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian TransformationMatrix fromT; 578f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian TransformationMatrix toT; 588f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian fromT.rotate3d((float)(fromOp ? fromOp->m_x : 0), 598f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (float)(fromOp ? fromOp->m_y : 0), 608f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (float)(fromOp ? fromOp->m_z : 1), 618f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (float)(fromOp ? fromOp->m_angle : 0)); 628f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 638f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian toT.rotate3d((float)(toOp ? toOp->m_x : 0), 648f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (float)(toOp ? toOp->m_y : 0), 658f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (float)(toOp ? toOp->m_z : 1), 668f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian (float)(toOp ? toOp->m_angle : 0)); 678f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 688f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Blend them 698f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian toT.blend(fromT, progress); 708f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 718f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Extract the result as a quaternion 728f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian TransformationMatrix::DecomposedType decomp; 738f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian toT.decompose(decomp); 748f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 758f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Convert that to Axis/Angle form 768f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian double x = -decomp.quaternionX; 778f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian double y = -decomp.quaternionY; 788f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian double z = -decomp.quaternionZ; 798f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian double length = sqrt(x * x + y * y + z * z); 808f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian double angle = 0; 818f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 828f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian if (length > 0.00001) { 838f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian x /= length; 848f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian y /= length; 858f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian z /= length; 868f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian angle = rad2deg(acos(decomp.quaternionW) * 2); 878f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian } else { 888f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian x = 0; 898f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian y = 0; 908f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian z = 1; 918f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian } 928f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return RotateTransformOperation::create(x, y, z, angle, ROTATE_3D); 938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} // namespace WebCore 96