Problems with TerrainGeometry

Hello,

I'm trying to add a terrain to the ogreode environment. Falling down works perfect, but everything is falling through my landscape. I have tried to copy the relevant parts from Landscape.cpp, but I think I missed something
My code:

Constructor:
PhysicsHandler::PhysicsHandler(Ogre::SceneManager* scene_mgr, Ogre::Root* ogre_root_) {
scene_mgr_ = scene_mgr;
ode_world_ = new OgreOde::World(scene_mgr_);
ode_world_->setGravity(Ogre::Vector3(0,-9.80665,0));
ode_world_->setCFM(10e-5);
ode_world_->setERP(0.8);
ode_world_->setAutoSleep(true);
ode_world_->setAutoSleepAverageSamplesCount(10);
ode_world_->setContactCorrectionVelocity(1.0);
ode_space_ = ode_world_->getDefaultSpace();
/* initialize stepper */
ode_stepper_ = new OgreOde::StepHandler(ode_world_, OgreOde::StepHandler::QuickStep, _time_step, max_frame_time,
time_scale);
ode_stepper_->setAutomatic(OgreOde::StepHandler::AutoMode_PostFrame, ogre_root_);
}

adds an entity to the ode world:
void PhysicsHandler::registerEntity(EntityPtr entity, Ogre::Entity* ogre_ent, Ogre::SceneNode* ogre_node) {
OgreOde::Body* ode_body = new OgreOde::Body(ode_world_);
ogre_node->attachObject(ode_body);

Ogre::Vector3 size(10.0,10.0,10.0);
OgreOde::BoxMass mMass(0.5, size);
mMass.setDensity(5.0, size);

OgreOde::Geometry* geom = (OgreOde::Geometry*)new OgreOde::BoxGeometry(size, ode_world_, ode_space_); // temporary
ogre_node->setScale(size.x * 0.1,size.y * 0.1,size.z * 0.1);
ode_body->setMass(mMass);
geom->setBody(ode_body);
ogre_ent->setUserObject(geom);
}

registers the terrain:
void PhysicsHandler::registerTerrain() {
int nodes_per_side = scene_mgr_->getOption("PageSize", &nodes_per_side);
Ogre::Vector3 scale = Ogre::Vector3::ZERO;
scene_mgr_->getOption("Scale", &scale);

//scene_mgr_->getOption("Width", &w);
//scene_mgr_->getOption("Height", &h);

if (nodes_per_side == 0)
{
Ogre::ConfigFile config;
Ogre::String val;

config.load("sample/data/levels/demo/terrain.cfg", "=", true); // todo!!!

val = config.getSetting( "PageSize" );
assert( !val.empty() );
nodes_per_side = atoi( val.c_str() );

val = config.getSetting( "PageWorldX" );
assert( !val.empty() );
scale.x = atof( val.c_str() ) / nodes_per_side;

val = config.getSetting( "MaxHeight" );
assert( !val.empty() );
scale.y = atof( val.c_str() );

val = config.getSetting( "PageWorldZ" );
assert( !val.empty() );
scale.z = atof( val.c_str() ) / nodes_per_side;
}
Ogre::Real worldWidth = scale.x * (nodes_per_side - 1);
Ogre::Real worldHeight = scale.z * (nodes_per_side - 1);

int nodes_per_side_all_pagesW = 0;
int nodes_per_side_all_pagesH = 0;

nodes_per_side_all_pagesW = nodes_per_side;
nodes_per_side_all_pagesH = nodes_per_side;

bool center = false;

_terrain = new OgreOde::TerrainGeometry(ode_world_,
ode_world_->getDefaultSpace(),
scale,
nodes_per_side_all_pagesW,
nodes_per_side_all_pagesH,
worldWidth,
worldHeight,
center);
_terrain->setHeightListener(this);
ode_world_->setCollisionListener(this);
}

Collision handler:
bool PhysicsHandler::collision(OgreOde::Contact* contact) {
Geometry * const g1 = contact->getFirstGeometry ();
Geometry * const g2 = contact->getSecondGeometry ();
const bool isg1Sphere = g1 && g1->getClass () != Geometry::Class_Sphere;
const bool isg2Sphere = g2 && g2->getClass () != Geometry::Class_Sphere;

if((isg1Sphere || isg2Sphere))
{
//handled by Vehicle.
}
else
{
contact->setBouncyness(0.0);
contact->setCoulombFriction(18.0);
}

return true;
}
heightat handler:
Ogre::Real PhysicsHandler::heightAt(const Ogre::Vector3& position)
{
return _terrain->getHeightAt(position);
}

Could you please give me a tip? I don't have any idea.

Please excuse my bad english and code

Greetings Fred

call _terrain->setDebug(true) and check wether the ogre entity and the ogreode geometry fit.

Also try reducing the density to 0.01 in mMass.setDensity(5.0, size). Your problem with objects falling through the landscape may be due to the bodies large mass.

a) OgreOde::BoxMass mMass(0.5, size) - sets total box mass to 0.5
b) mMass.setDensity(5.0, size) - sets total box mass to 5.0*size, in your case 5*10*10*10

Many thanks, dermonts tip solved it!
Thank you both for your (very) fast help