SCR_AIDecoTestIsMovingTowardsMe.c

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/*
Returns true when velocity vector is aimed towards me (angle is below 90 degrees).
*/
class SCR_AIDecoTestIsMovingTowardsMe : DecoratorTestScripted
{
    protected override bool TestFunction(AIAgent agent, IEntity controlled)
    {
        if (!controlled)
            return false;
        
        Physics phy = controlled.GetPhysics();
        
        if (!phy)
            return false;
        
        // Bail if velocity is around zero
        vector velocityWorld = phy.GetVelocity();
        float velocityAbsSq = velocityWorld.LengthSq();
        if (velocityAbsSq <= 0.001)
            return false;
        
        vector velocityDir = velocityWorld.Normalized();
        
        IEntity myEntity = agent.GetControlledEntity();
        if (!myEntity)
            return false;
        
        vector vecToMe = vector.Direction(controlled.GetOrigin(), myEntity.GetOrigin());
        vecToMe.Normalize();
        
        float cosAngle = vector.Dot(vecToMe, velocityDir);
        
        return cosAngle > 0;
    }
};