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Mike Pall wrote:
Floats are only needed to interface to existing C code or when you desperately need to save space (i.e. hundreds of megabytes)
Yes, I used float here because I needed to interface to existing C++ code ^^. (I can change c++ code's type to double, but that's another open source project and they use float in it and I think it's OK because it's a cross platform lib from mobile to PC)
Thanks for the quick fixing! Zhu Ya Dong