--------------------------------------------------------------------------------
--  Function......... : updateDynamics
--  Author........... : 
--  Description...... : 
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
function FPSCamera.updateDynamics ( )
--------------------------------------------------------------------------------
	
	local o = this.getObject  ( )
    local d = this.hDynObject ( )
    
    if ( d ~= nil )
    then
        local oXx, oXy, oXz = object.getXAxis ( o, object.kGlobalSpace )
        local oYx, oYy, oYz = object.getYAxis ( o, object.kGlobalSpace )
        local oZx, oZy, oZz = object.getZAxis ( o, object.kGlobalSpace )
    
        local fx = 0
        local fy = 0
        local fz = 0
        
        if      ( this.bMoveForward  ( ) ) then fx, fy, fz = math.vectorSubtract ( fx, fy, fz, oZx, oZy, oZz )
        elseif  ( this.bMoveBackward ( ) ) then fx, fy, fz = math.vectorAdd      ( fx, fy, fz, oZx, oZy, oZz ) 
        end

        if      ( this.bStrafeRight  ( ) ) then fx, fy, fz = math.vectorAdd      ( fx, fy, fz, oXx, oXy, oXz )
        elseif  ( this.bStrafeLeft   ( ) ) then fx, fy, fz = math.vectorSubtract ( fx, fy, fz, oXx, oXy, oXz ) 
        end
        
        fx, fy, fz = math.vectorNormalize   ( fx, 0, fz )
        fx, fy, fz = math.vectorScale       ( fx, 0, fz, 5000 )
        
        dynamics.addConstantForce ( d, fx, fy, fz, object.kGlobalSpace )
        
        -- Gravity
        --
        dynamics.addConstantForce ( d, 0, -2000, 0, object.kGlobalSpace )
    end
	
--------------------------------------------------------------------------------
end
--------------------------------------------------------------------------------