Weird physics behavior

[elcoo]

And another thread by me, sorry about that

I played around with physics a bit and I got this weird problem in the following code:

// ====================================================================
// This file was generated by LEBuilder
// http://leadwerks.com/werkspace
// ====================================================================
#include "engine.h"
#include <iostream>
#include <string>
#define LW_SSAO
const int  ScreenWidth = 1024;
const int  ScreenHeight = 768;
const char* MediaDir =  "C:/Program Files/Leadwerks Engine SDK";
const char* AppTitle = "LeadwerksTest";
void createPSphere(float,float,float,TMaterial);
void ErrOut( const std::string& message ) { std::cerr << message << std::endl; }
// -------------------------------
int main( int argn, char* argv[] )
{
// Initialize
if( !Initialize() )
 return 1;	   
SetAppTitle( AppTitle ) ;
RegisterAbstractPath( MediaDir );

// Set graphics mode	   
if( !Graphics(ScreenWidth,ScreenHeight) )
{			   
 ErrOut( "Failed to set graphics mode."  );
 return 1;	   
}

// Create framework object and set it to a global object so other scripts can access it
TFramework fw = CreateFramework();	   
if( fw == NULL )	   
{
 ErrOut( "Failed to initialize engine." );			   
 return 1;	   
}	   

// Set Lua framework object	   
SetGlobalObject( "fw", fw );			   

// Set Lua framework variable	   
BP lua = GetLuaState();	   
lua_pushobject( lua, fw );	   
lua_setglobal( lua, "fw" );	   
lua_pop( lua, 1 );	   

// Get framework main camera	   
TCamera camera = GetLayerCamera( GetFrameworkLayer(0) );	   
PositionEntity( camera, Vec3(2,2,-10) );	   

// Create cube
TMaterial material = LoadMaterial( "abstract::cobblestones.mat" );	   
Collisions(1,1,1);

TMesh mesh2 = CreateSphere(4);	   
PaintEntity( mesh2, material );
TBody body2=CreateBodySphere();
EntityType(body2,1);
EntityParent(mesh2,body2);
SetBodyMass(body2,1);
PositionEntity( body2, Vec3(0.01,10,0) );
SetBodyMassCenter(body2, Vec3(0,0,0));
TMesh mesh = CreateSphere(4);	   
PaintEntity( mesh, material );
TBody body=CreateBodySphere();
EntityType(body,1);
EntityParent(mesh,body);
SetBodyMass(body,1);
PositionEntity( body, Vec3(0,20,0) );
SetBodyMassCenter(body, Vec3(0,0,0));
// Create ground
TMesh ground = CreateCube();	   
ScaleEntity( ground, Vec3(20,1,20) );	   
PositionEntity( ground, Vec3(0,-1.4,0) );	   
PaintEntity( ground, material );	   
body=CreateBodyBox();
ScaleEntity( body, Vec3(20,1,20) );   
PositionEntity( body, Vec3(0,-1.4,0) );
EntityType(body,1);
SetBodyMass(body,0);
// Add some light
TLight light = CreateDirectionalLight();	   
RotateEntity( light, Vec3(45,45,45) );
SetShadowSoftness( light, 50);
//
DebugPhysics(1);
while( !KeyHit() && !AppTerminate() )	   
{			   
 if( !AppSuspended() )
 {  
  UpdateFramework();			   
  RenderFramework();			   
  Flip( 0 );	   
 }
}			   

return Terminate();
}

 

It's based on the spinning cube template. The problem is, that "body2" with the small offset of 0.01 in the x-coord just falls through the ground. It seems the spheres can only collide with the ground when they are perfectly placed in the middle of it. It works fine when using box-colliders though. What am I doing wrong?

[elcoo]

Argl, I found the fault. I used ScaleEntity on the ground, instead of initializing it with the right size.

It's so typical for me - After trying around for an hour and not finding the error I post a thread about it and immidiatly find the cause

[Roland]

Its a very common thing that when you have explained a problem , you will get the answer from you self.

We use this method at my work. If I have problems with some programming thing I can go to some other guy and explain my problem, he does not even has to know any details about it. Its just the procedure of explaining that often leads to a solution, without the listener having to say one word. In fact I have many times not even finished my explaining of the problem before coming up with the solution on the problem. So keep on telling us of the problems