134 lines
3.9 KiB
C++
134 lines
3.9 KiB
C++
/*
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Copyright (c) 2012 Advanced Micro Devices, Inc.
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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//Originally written by Erwin Coumans
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#include "b3GpuGenericConstraint.h"
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#include "Bullet3Collision/NarrowPhaseCollision/shared/b3RigidBodyData.h"
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#include <new>
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#include "Bullet3Common/b3Transform.h"
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void b3GpuGenericConstraint::getInfo1(unsigned int* info, const b3RigidBodyData* bodies)
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{
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switch (m_constraintType)
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{
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case B3_GPU_POINT2POINT_CONSTRAINT_TYPE:
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{
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*info = 3;
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break;
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};
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default:
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{
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b3Assert(0);
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}
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};
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}
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void getInfo2Point2Point(b3GpuGenericConstraint* constraint, b3GpuConstraintInfo2* info, const b3RigidBodyData* bodies)
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{
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b3Transform trA;
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trA.setIdentity();
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trA.setOrigin(bodies[constraint->m_rbA].m_pos);
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trA.setRotation(bodies[constraint->m_rbA].m_quat);
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b3Transform trB;
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trB.setIdentity();
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trB.setOrigin(bodies[constraint->m_rbB].m_pos);
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trB.setRotation(bodies[constraint->m_rbB].m_quat);
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// anchor points in global coordinates with respect to body PORs.
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// set jacobian
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info->m_J1linearAxis[0] = 1;
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info->m_J1linearAxis[info->rowskip + 1] = 1;
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info->m_J1linearAxis[2 * info->rowskip + 2] = 1;
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b3Vector3 a1 = trA.getBasis() * constraint->getPivotInA();
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//b3Vector3 a1a = b3QuatRotate(trA.getRotation(),constraint->getPivotInA());
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{
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b3Vector3* angular0 = (b3Vector3*)(info->m_J1angularAxis);
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b3Vector3* angular1 = (b3Vector3*)(info->m_J1angularAxis + info->rowskip);
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b3Vector3* angular2 = (b3Vector3*)(info->m_J1angularAxis + 2 * info->rowskip);
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b3Vector3 a1neg = -a1;
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a1neg.getSkewSymmetricMatrix(angular0, angular1, angular2);
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}
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if (info->m_J2linearAxis)
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{
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info->m_J2linearAxis[0] = -1;
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info->m_J2linearAxis[info->rowskip + 1] = -1;
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info->m_J2linearAxis[2 * info->rowskip + 2] = -1;
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}
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b3Vector3 a2 = trB.getBasis() * constraint->getPivotInB();
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{
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// b3Vector3 a2n = -a2;
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b3Vector3* angular0 = (b3Vector3*)(info->m_J2angularAxis);
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b3Vector3* angular1 = (b3Vector3*)(info->m_J2angularAxis + info->rowskip);
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b3Vector3* angular2 = (b3Vector3*)(info->m_J2angularAxis + 2 * info->rowskip);
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a2.getSkewSymmetricMatrix(angular0, angular1, angular2);
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}
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// set right hand side
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// b3Scalar currERP = (m_flags & B3_P2P_FLAGS_ERP) ? m_erp : info->erp;
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b3Scalar currERP = info->erp;
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b3Scalar k = info->fps * currERP;
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int j;
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for (j = 0; j < 3; j++)
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{
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info->m_constraintError[j * info->rowskip] = k * (a2[j] + trB.getOrigin()[j] - a1[j] - trA.getOrigin()[j]);
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//printf("info->m_constraintError[%d]=%f\n",j,info->m_constraintError[j]);
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}
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#if 0
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if(m_flags & B3_P2P_FLAGS_CFM)
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{
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for (j=0; j<3; j++)
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{
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info->cfm[j*info->rowskip] = m_cfm;
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}
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}
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#endif
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#if 0
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b3Scalar impulseClamp = m_setting.m_impulseClamp;//
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for (j=0; j<3; j++)
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{
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if (m_setting.m_impulseClamp > 0)
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{
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info->m_lowerLimit[j*info->rowskip] = -impulseClamp;
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info->m_upperLimit[j*info->rowskip] = impulseClamp;
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}
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}
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info->m_damping = m_setting.m_damping;
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#endif
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}
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void b3GpuGenericConstraint::getInfo2(b3GpuConstraintInfo2* info, const b3RigidBodyData* bodies)
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{
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switch (m_constraintType)
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{
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case B3_GPU_POINT2POINT_CONSTRAINT_TYPE:
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{
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getInfo2Point2Point(this, info, bodies);
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break;
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};
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default:
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{
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b3Assert(0);
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}
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};
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}
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