Irrlicht And Newton Examples Please

[dejai]

I have Succesfully INSTALLED NEWTOn!! Problem, where do i get information on using it with irrlicht. That tutorial is so out of date. I have also succesfully configured it to my system does anyone have any spare source code of showing it working with irrlicht for dev C++ even just pasting it would be cool.

Or a link to it in use? .exe

[Wyszo]

O_o

http://irrlicht.sourceforge.net/tut_newton.html
(to make this tut work you have to change mat.M to mat.pointer())

[roxaz]

O_o

http://irrlicht.sourceforge.net/tut_newton.html
(to make this tut work you have to change mat.M to mat.pointer())

i used just mat instead of mat.M and it worked good too. BTW this way was suggested in irrlicht 1.3 changelog

[hybrid]

Uhm, no, in case you want the pointer you should use the method. Only when replaceing mat.M[x] you should use mat[x].

[white tiger]

I have also succesfully configured it to my system does anyone have any spare source code of showing it working with irrlicht for dev C++ even just pasting it would be cool.

there are 3 wrappers for newton and you look for source code example

[JonLT]

Ok here goes, I'll be very nice and write a little example:

Code: Select all

#include <irrlicht.h>
#include <newton.h>

//the irrlicht namespaces
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;

//the newton callbacks
void applyForceAndTorque(const NewtonBody* body);
void setTransform(const NewtonBody* body, const float* matrix);

int main()
{
    /*
    create the irrlicht device and
    pointers to the scene manager and video driver
    */
    IrrlichtDevice* device = createDevice();
    ISceneManager* smgr = device->getSceneManager();
    IVideoDriver* driver = device->getVideoDriver();

    //create the newton world
    NewtonWorld* nWorld = NewtonCreate(NULL, NULL);

    //create a scene node to represent the newton body
    ISceneNode *node = smgr->addCubeSceneNode(10);

    //create a box collision of the dimensions 10x10x10 (like the scene node)
    NewtonCollision* collision = NewtonCreateBox(nWorld, 10, 10, 10, NULL);
    //create a newton body from the collision
    NewtonBody* body = NewtonCreateBody(nWorld, collision);
    //set up the body
    float mass = 10;
    float Ixx = 1; //this isn't the right value look up inertia on
    float Iyy = 1; //the net and you'll find how to calculate
    float Izz = 1; //the accurate inertia
    NewtonBodySetMassMatrix(body, mass, Ixx, Iyy, Izz);
    //assign the callbacks
    NewtonBodySetForceAndTorqueCallback(body, applyForceAndTorque);
    NewtonBodySetTransformCallback(body, setTransform);
    //assign the scene node as user data in the newton body
    NewtonBodySetUserData(body, node);

    //add a camera to the scene
    ICameraSceneNode *cam = smgr->addCameraSceneNodeMaya();

    //create some valuables to keep tract of time
    float currentTime = 0;
    float timeAccumulator = 0;
    float dt = 10; //update every 10 milliseconds

    //the main loop
    while(device->run())
    {
        //the usual irrlicht stuff
        driver->beginScene(true, true, SColor(100,100,100,100));
        smgr->drawAll();
        driver->endScene();

        //update the newton world
        //get the time from the device
        f32 newTime = device->getTimer()->getTime();
        //calculate the time step
        f32 deltaTime = newTime - currentTime;
        //update CurrentTime
        currentTime = newTime;
        //add the time step to the time accumulator
        timeAccumulator += deltaTime;
        //update when the TimeAccumulator is big enough
        while(timeAccumulator >= dt)
        {
            //update
            NewtonUpdate(nWorld, dt/1000); //convert to seconds
            timeAccumulator -= dt;
        }

    }

    return 0;
}



// add force and torque to rigid body
void applyForceAndTorque(const NewtonBody* body)
{

	//some floats to hold the information of the body
	float Ixx;
	float Iyy;
	float Izz;
	float mass;

	//get the indo at put it in the above floats
	NewtonBodyGetMassMatrix (body, &mass, &Ixx, &Iyy, &Izz);
	//create a force vector with gravity
	float force[3] = {0.0f, -mass * 9.8f, 0.0f};
	//apply the force
	NewtonBodySetForce(body, force);
}

// set the transformation of a rigid body
void setTransform(const NewtonBody* body, const float* matrix)
{
	// get the scene node form the body
	ISceneNode* node = (ISceneNode*)NewtonBodyGetUserData(body);

	//copy the transform matrix to a irrlicht matrix
    matrix4 mat;
    memcpy(mat.pointer(), matrix, sizeof(float)*16);

    //move the scene node according to the matrix
    node->setPosition(mat.getTranslation());
    node->setRotation(mat.getRotationDegrees());

}

[dejai]

WoW Thanks for all the effort you guys put in to helping me
But chaning that mat thing does not help the compiler has a problem with the first line...

nWorld = NewtonCreate(NULL, NULL);

[Midnight]

are they getting lazier?... just stop responding after the first time.. maybe they'll learn.

[monkeycracks]

would help to know what the problem was.

[dejai]

Who said there was actually A probelm I justed needed some help finding some UP TO DATE Newton Information... Some basic tutorials Etc