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Pi Technology and the Ford Motor Company are using MATLAB Simulink/Stateflow model based design and automatic code generation in C, for the main software development for three electronic control units targeted at the Ford Focus fuel cell vehicle. The automatic generation of code for embedded automotive applications offers a number of potential advantages over traditional methods. These include faster development, the avoidance of coding errors and avoiding inconsistencies with the design specification. However, the use of automatically generated code in production-intent safety-related systems requires at least the same standard of validation and verification. If code generation were perfect, one could validate only the design. However, it is impractical to require that the code generator must be validated for all possible input designs. Furthermore it must be assumed that the compiler and the hardware can also introduce faults.

Different approaches have been proposed in the past for designing smooth complex reflectors. One major difficulty in designing headlamps with smooth reflectors is maintaining the slope continuity of the reflector surface without compromising the robustness of the beam pattern. In this paper, two simple algorithms are proposed for developing smooth complex reflector headlamps. The first is a numerical marching scheme used to generate smooth complex surfaces based on user specified spread points. In the second approach, a parametrically represented smooth surface is generated with user defined spread points to obtain the desired beam patterns.