mirror of
https://github.com/bulletphysics/bullet3
synced 2024-12-15 06:00:12 +00:00
a651cb9ab4
remove 'enableBlend' from API, graphics instances use alpha component instead fix forward axis for SimpleCamera
379 lines
10 KiB
C++
379 lines
10 KiB
C++
#include "InverseKinematicsExample.h"
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#include "../CommonInterfaces/CommonGraphicsAppInterface.h"
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#include "Bullet3Common/b3Quaternion.h"
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#include "Bullet3Common/b3Transform.h"
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#include "Bullet3Common/b3AlignedObjectArray.h"
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#include "../CommonInterfaces/CommonRenderInterface.h"
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#include "../CommonInterfaces/CommonExampleInterface.h"
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#include "../CommonInterfaces/CommonGUIHelperInterface.h"
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#include "../OpenGLWindow/OpenGLInclude.h"
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#include "BussIK/Node.h"
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#include "BussIK/Tree.h"
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#include "BussIK/Jacobian.h"
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#include "BussIK/VectorRn.h"
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#define RADIAN(X) ((X)*RadiansToDegrees)
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#define MAX_NUM_NODE 1000
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#define MAX_NUM_THETA 1000
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#define MAX_NUM_EFFECT 100
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double T = 0;
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VectorR3 targetaa[MAX_NUM_EFFECT];
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// Make slowdown factor larger to make the simulation take larger, less frequent steps
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// Make the constant factor in Tstep larger to make time pass more quickly
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//const int SlowdownFactor = 40;
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const int SlowdownFactor = 0; // Make higher to take larger steps less frequently
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const int SleepsPerStep=SlowdownFactor;
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int SleepCounter=0;
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//const double Tstep = 0.0005*(double)SlowdownFactor; // Time step
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int AxesList; /* list to hold the axes */
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int AxesOn; /* ON or OFF */
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float Scale, Scale2; /* scaling factors */
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int JointLimitsOn;
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int RestPositionOn;
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int UseJacobianTargets1;
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int numIteration = 1;
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double error = 0.0;
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double errorDLS = 0.0;
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double errorSDLS = 0.0;
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double sumError = 0.0;
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double sumErrorDLS = 0.0;
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double sumErrorSDLS = 0.0;
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#ifdef _DYNAMIC
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bool initMaxDist = true;
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extern double Excess[];
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extern double dsnorm[];
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#endif
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void Reset(Tree &tree, Jacobian* m_ikJacobian)
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{
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AxesOn = false;
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Scale = 1.0;
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Scale2 = 0.0; /* because add 1. to it in Display() */
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JointLimitsOn = true;
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RestPositionOn = false;
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UseJacobianTargets1 = false;
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tree.Init();
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tree.Compute();
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m_ikJacobian->Reset();
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}
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// Update target positions
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void UpdateTargets( double T2, Tree & treeY) {
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double T = T2 / 5.;
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targetaa[0].Set(0.6*b3Sin(0), 0.6*b3Cos(0), 0.5+0.4*b3Sin(3 * T));
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}
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// Does a single update (on one kind of tree)
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void DoUpdateStep(double Tstep, Tree & treeY, Jacobian *jacob, int ikMethod) {
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if ( SleepCounter==0 ) {
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T += Tstep;
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UpdateTargets( T , treeY);
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}
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if ( UseJacobianTargets1 ) {
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jacob->SetJtargetActive();
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}
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else {
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jacob->SetJendActive();
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}
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jacob->ComputeJacobian(targetaa); // Set up Jacobian and deltaS vectors
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// Calculate the change in theta values
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switch (ikMethod) {
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case IK_JACOB_TRANS:
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jacob->CalcDeltaThetasTranspose(); // Jacobian transpose method
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break;
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case IK_DLS:
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jacob->CalcDeltaThetasDLS(); // Damped least squares method
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break;
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case IK_DLS_SVD:
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jacob->CalcDeltaThetasDLSwithSVD();
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break;
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case IK_PURE_PSEUDO:
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jacob->CalcDeltaThetasPseudoinverse(); // Pure pseudoinverse method
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break;
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case IK_SDLS:
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jacob->CalcDeltaThetasSDLS(); // Selectively damped least squares method
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break;
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default:
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jacob->ZeroDeltaThetas();
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break;
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}
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if ( SleepCounter==0 ) {
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jacob->UpdateThetas(); // Apply the change in the theta values
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jacob->UpdatedSClampValue(targetaa);
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SleepCounter = SleepsPerStep;
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}
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else {
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SleepCounter--;
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}
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}
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///quick demo showing the right-handed coordinate system and positive rotations around each axis
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class InverseKinematicsExample : public CommonExampleInterface
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{
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CommonGraphicsApp* m_app;
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int m_ikMethod;
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Tree m_ikTree;
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b3AlignedObjectArray<Node*> m_ikNodes;
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Jacobian* m_ikJacobian;
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b3AlignedObjectArray<int> m_movingInstances;
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int m_targetInstance;
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enum
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{
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numCubesX = 20,
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numCubesY = 20
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};
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public:
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InverseKinematicsExample(CommonGraphicsApp* app, int option)
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:m_app(app),
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m_ikMethod(option),
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m_targetInstance(-1)
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{
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m_app->setUpAxis(2);
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{
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b3Vector3 extents=b3MakeVector3(100,100,100);
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extents[m_app->getUpAxis()]=1;
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int xres = 20;
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int yres = 20;
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b3Vector4 color0=b3MakeVector4(0.4, 0.4, 0.4,1);
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b3Vector4 color1=b3MakeVector4(0.6, 0.6, 0.6,1);
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m_app->registerGrid(xres, yres, color0, color1);
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}
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///create some graphics proxy for the tracking target
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///the endeffector tries to track it using Inverse Kinematics
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{
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int sphereId = m_app->registerGraphicsUnitSphereShape(SPHERE_LOD_MEDIUM);
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b3Vector3 pos = b3MakeVector3(1,1,1);
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pos[app->getUpAxis()] = 1;
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b3Quaternion orn(0, 0, 0, 1);
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b3Vector4 color = b3MakeVector4(1., 0.3, 0.3, 1);
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b3Vector3 scaling = b3MakeVector3(.02, .02, .02);
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m_targetInstance = m_app->m_renderer->registerGraphicsInstance(sphereId, pos, orn, color, scaling);
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}
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m_app->m_renderer->writeTransforms();
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}
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virtual ~InverseKinematicsExample()
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{
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}
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virtual void physicsDebugDraw(int debugDrawMode)
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{
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}
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virtual void initPhysics()
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{
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BuildKukaIIWAShape();
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m_ikJacobian = new Jacobian(&m_ikTree);
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Reset(m_ikTree,m_ikJacobian);
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}
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virtual void exitPhysics()
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{
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delete m_ikJacobian;
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m_ikJacobian = 0;
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}
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void BuildKukaIIWAShape();
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void getLocalTransform(const Node* node, b3Transform& act)
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{
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b3Vector3 axis = b3MakeVector3(node->v.x, node->v.y, node->v.z);
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b3Quaternion rot(0, 0, 0, 1);
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if (axis.length())
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{
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rot = b3Quaternion (axis, node->theta);
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}
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act.setIdentity();
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act.setRotation(rot);
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act.setOrigin(b3MakeVector3(node->r.x, node->r.y, node->r.z));
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}
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void MyDrawTree(Node* node, const b3Transform& tr)
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{
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b3Vector3 lineColor = b3MakeVector3(0, 0, 0);
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int lineWidth = 2;
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if (node != 0) {
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// glPushMatrix();
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b3Vector3 pos = b3MakeVector3(tr.getOrigin().x, tr.getOrigin().y, tr.getOrigin().z);
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b3Vector3 color = b3MakeVector3(0, 1, 0);
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int pointSize = 10;
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m_app->m_renderer->drawPoint(pos, color, pointSize);
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m_app->m_renderer->drawLine(pos, pos+ 0.05*tr.getBasis().getColumn(0), b3MakeVector3(1,0,0), lineWidth);
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m_app->m_renderer->drawLine(pos, pos + 0.05*tr.getBasis().getColumn(1), b3MakeVector3(0, 1, 0), lineWidth);
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m_app->m_renderer->drawLine(pos, pos + 0.05*tr.getBasis().getColumn(2), b3MakeVector3(0, 0, 1), lineWidth);
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b3Vector3 axisLocal = b3MakeVector3(node->v.x, node->v.y, node->v.z);
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b3Vector3 axisWorld = tr.getBasis()*axisLocal;
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m_app->m_renderer->drawLine(pos, pos + 0.1*axisWorld, b3MakeVector3(.2, 0.2, 0.7), 5);
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//node->DrawNode(node == root); // Recursively draw node and update ModelView matrix
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if (node->left) {
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b3Transform act;
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getLocalTransform(node->left, act);
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b3Transform trl = tr*act;
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m_app->m_renderer->drawLine(tr.getOrigin(), trl.getOrigin(), lineColor, lineWidth);
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MyDrawTree(node->left, trl); // Draw tree of children recursively
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}
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// glPopMatrix();
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if (node->right) {
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b3Transform act;
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getLocalTransform(node->right, act);
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b3Transform trr = tr*act;
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m_app->m_renderer->drawLine(tr.getOrigin(), trr.getOrigin(), lineColor, lineWidth);
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MyDrawTree(node->right,trr); // Draw right siblings recursively
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}
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}
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}
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virtual void stepSimulation(float deltaTime)
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{
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DoUpdateStep(deltaTime, m_ikTree, m_ikJacobian, m_ikMethod);
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}
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virtual void renderScene()
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{
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b3Transform act;
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getLocalTransform(m_ikTree.GetRoot(), act);
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MyDrawTree(m_ikTree.GetRoot(), act);
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b3Vector3 pos = b3MakeVector3(targetaa[0].x, targetaa[0].y, targetaa[0].z);
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b3Quaternion orn(0, 0, 0, 1);
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m_app->m_renderer->writeSingleInstanceTransformToCPU(pos, orn, m_targetInstance);
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m_app->m_renderer->writeTransforms();
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m_app->m_renderer->renderScene();
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}
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virtual void physicsDebugDraw()
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{
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}
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virtual bool mouseMoveCallback(float x,float y)
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{
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return false;
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}
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virtual bool mouseButtonCallback(int button, int state, float x, float y)
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{
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return false;
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}
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virtual bool keyboardCallback(int key, int state)
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{
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return false;
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}
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virtual void resetCamera()
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{
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float dist = 1.3;
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float pitch = -13;
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float yaw = 120;
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float targetPos[3]={-0.35,0.14,0.25};
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if (m_app->m_renderer && m_app->m_renderer->getActiveCamera())
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{
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m_app->m_renderer->getActiveCamera()->setCameraDistance(dist);
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m_app->m_renderer->getActiveCamera()->setCameraPitch(pitch);
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m_app->m_renderer->getActiveCamera()->setCameraYaw(yaw);
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m_app->m_renderer->getActiveCamera()->setCameraTargetPosition(targetPos[0],targetPos[1],targetPos[2]);
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}
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}
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};
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void InverseKinematicsExample::BuildKukaIIWAShape()
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{
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//const VectorR3& unitx = VectorR3::UnitX;
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const VectorR3& unity = VectorR3::UnitY;
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const VectorR3& unitz = VectorR3::UnitZ;
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const VectorR3 unit1(sqrt(14.0) / 8.0, 1.0 / 8.0, 7.0 / 8.0);
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const VectorR3& zero = VectorR3::Zero;
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float minTheta = -4 * PI;
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float maxTheta = 4 * PI;
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m_ikNodes.resize(8);//7DOF+additional endeffector
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m_ikNodes[0] = new Node(VectorR3(0.100000, 0.000000, 0.087500), unitz, 0.08, JOINT, -1e30, 1e30, RADIAN(0.));
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m_ikTree.InsertRoot(m_ikNodes[0]);
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m_ikNodes[1] = new Node(VectorR3(0.100000, -0.000000, 0.290000), unity, 0.08, JOINT, -0.5, 0.4, RADIAN(0.));
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m_ikTree.InsertLeftChild(m_ikNodes[0], m_ikNodes[1]);
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m_ikNodes[2] = new Node(VectorR3(0.100000, -0.000000, 0.494500), unitz, 0.08, JOINT, minTheta, maxTheta, RADIAN(0.));
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m_ikTree.InsertLeftChild(m_ikNodes[1], m_ikNodes[2]);
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m_ikNodes[3] = new Node(VectorR3(0.100000, 0.000000, 0.710000), -unity, 0.08, JOINT, minTheta, maxTheta, RADIAN(0.));
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m_ikTree.InsertLeftChild(m_ikNodes[2], m_ikNodes[3]);
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m_ikNodes[4] = new Node(VectorR3(0.100000, 0.000000, 0.894500), unitz, 0.08, JOINT, minTheta, maxTheta, RADIAN(0.));
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m_ikTree.InsertLeftChild(m_ikNodes[3], m_ikNodes[4]);
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m_ikNodes[5] = new Node(VectorR3(0.100000, 0.000000, 1.110000), unity, 0.08, JOINT, minTheta, maxTheta, RADIAN(0.));
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m_ikTree.InsertLeftChild(m_ikNodes[4], m_ikNodes[5]);
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m_ikNodes[6] = new Node(VectorR3(0.100000, 0.000000, 1.191000), unitz, 0.08, JOINT, minTheta, maxTheta, RADIAN(0.));
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m_ikTree.InsertLeftChild(m_ikNodes[5], m_ikNodes[6]);
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m_ikNodes[7] = new Node(VectorR3(0.100000, 0.000000, 1.20000), zero, 0.08, EFFECTOR);
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m_ikTree.InsertLeftChild(m_ikNodes[6], m_ikNodes[7]);
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}
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class CommonExampleInterface* InverseKinematicsExampleCreateFunc(struct CommonExampleOptions& options)
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{
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return new InverseKinematicsExample(options.m_guiHelper->getAppInterface(), options.m_option);
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}
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