Miscellaneous Utility Functions
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Dbl2Float()- Provides safe type casting from double to float with an indication of overflow returned in thevalidparameter. Depending on machine/compiler settings, the following code may throw an under/over-flow exception or quietly return an undefined value:
// unsafe
float val = (float)_tcstod(pNptr, ppEndptr);
A safer method would be:
BOOL valid = false;
float val = Dbl2Flt(_tcstod(pNptr, ppEndptr), &valid);
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Dbl2Int()- Provides safe type casting from double to int with an indication of overflow returned in thevalidparameter. -
mod()- This function returns the mathematical modulo operation and handles negatives correctly. The standard math functionsfmod()andfmodf()and the operator % will return negative results if the first operand is negative. This function will always return a positive remainder. -
SinCos()- Returns both the sine and cosine of the angle specified, as floats. This function uses assembly language on Intel CPUs. -
Sin()- Returns the sine of the angle specified as a float. This function uses assembly language on Intel CPUs. -
Cos()- Returns the cosine of the angle specified as a float. This function uses assembly language on Intel CPUs. -
Sqrt()- Returns the square root of the argument specified as a float. This function uses assembly language on Intel CPUs. -
sramp()- This function makes a kind of straight-segment S curve. The parameters are x, a, b, d. The algorithm is as follows: -
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for
a+d < x < b-d sramp(x) = x -
for
a-d < x < a+d sramp()makes a smooth transition (parabolic) from sramp' = 0 to sramp' = 1 -
for
b-d < x < b+d sramp()makes a smooth transition (parabolic) from sramp' = 1 to sramp' = 0
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for
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IsDebugging()- Returns true if 3ds Max is running under the debugger; otherwise false. -
NumberOfProcessors()- Returns the number of processors in the machine 3ds Max is running on. -
IsWindows9x()- Returns true if 3ds Max is running on Windows 9x (95 or 98); otherwise false. -
IsWindows98or2000()- Returns true if 3ds Max is running on Windows 98 or Windows 2000; otherwise false. -
GetScreenWidth()- Returns the width of the screen (taking into consideration if multiple monitors are in use). -
GetScreenHeight()- Returns the height of the screen (taking into consideration if multiple monitors are in use).
