void BulletSpheresApp::update()
{
// update time
// update bullet context
updateTime();
mContext->setGravity( vec3( 0 ) );
mContext->update();
// add attractive force
mat4 * matrices = (mat4*)mMatrices->map( GL_WRITE_ONLY );
for( auto &body : mRigidBodies ){
body.update( mTimeElapsed );
int index = body.getId();
if( index >=2 ){ // small orbs
for( int i=0; i<2; i++ ){
vec3 pos = mRigidBodies[i].getPos();
float size = mRigidBodies[i].getSize();
float strength = mRigidBodies[i].getStrength();
body.attract( pos, size, strength );
}
matrices[index-2] = body.getMatrix();
} else { // big orbs
float size = mRigidBodies[index].getSize();
body.attract( vec3( 0 ), size, 1.0f );
}
}
mMatrices->unmap();
}
void HeightfieldTerrainApp::update()
{
// must update the world.
mContext->update();
mCam.setEyePoint( vec3(mCam.getEyePoint().x, mCamHeight, mCam.getEyePoint().z ) );
}