math utilities
January 16, 2005 10:14 PM
i tried to register math functions but always fail.
r = engine->RegisterGlobalFunction("float sin (float)", asFUNCTION(sin), asCALL_CDECL); assert( r >= 0 );
i wonder if there is any available math functions in angelscript.
122
January 17, 2005 03:01 AM
Regular "sin" returns double and wants a double argument. I'm not sure but this might make the registering fail since you declare it as returning float and wanting a float argument.
Try to register with "double sin(double)" instead, or you could register "sinf" with asFUNCTION(sinf). sinf is just like sin except that it returns float and accepts a float argument.
Try to register with "double sin(double)" instead, or you could register "sinf" with asFUNCTION(sinf). sinf is just like sin except that it returns float and accepts a float argument.
468
January 17, 2005 04:04 AM
What will be the return value on success/failure?
(Ie is the assert correct with >= instead of >)
(Ie is the assert correct with >= instead of >)
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January 17, 2005 07:18 AM
This works (I just verified it):
You'll have to do '#include <math.h>' of course.
Kitt3n:
The return value is negative on error. So the correct test to do is 'r >= 0'.
int r = engine->RegisterGlobalFunction("float sin(float)", asFUNCTION(sinf), asCALL_CDECL); assert( r >= 0 );You'll have to do '#include <math.h>' of course.
Kitt3n:
The return value is negative on error. So the correct test to do is 'r >= 0'.
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122
January 25, 2005 04:49 PM
Here's my math-collection, just in case anyone might find a use for it.
I really can't remember if I wrote it myself, if somebody else wrote it or even if it's straight from the AS-source :)
Comments & suggestions are always welcome ofcourse.
I really can't remember if I wrote it myself, if somebody else wrote it or even if it's straight from the AS-source :)
Comments & suggestions are always welcome ofcourse.
//---------------------------------------------------------------------------------------------------------------------// Math utils//---------------------------------------------------------------------------------------------------------------------const float asPI = M_PI;float asRandF() { return float(rand()) / float(RAND_MAX); } // return a random float in range [0..1]float asAbs(float inVal) { return ::fabs(inVal); }float asMin(float inA, float inB) { return inA <= inB ? inA : inB; }float asMax(float inA, float inB) { return inA >= inB ? inA : inB; }float asFloor(float inVal) { return float(floor(inVal)); }float asCeil(float inVal) { return float(ceil(inVal)); }float asRound(float inVal) { return float(floor(inVal + 0.5f)); }float asClamp(float inVal, float inMin, float inMax) { return (inVal < inMin ? inMin : (inVal > inMax ? inMax : inVal)); }void as_RegisterMathUtils(asIScriptEngine * outEngine){ // stupidity check if (outEngine == NULL) return; // A few common math functions, taken directly from the C runtime library int r; r = outEngine->RegisterGlobalProperty("const float PI", const_cast<float *>(&asPI)); assert(r >= 0); r = outEngine->RegisterGlobalFunction("float Abs(float)", asFUNCTION(asAbs), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Sin(float)", asFUNCTION(::sinf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Cos(float)", asFUNCTION(::cosf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Sqrt(float)", asFUNCTION(::sqrtf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float ArcSin(float)", asFUNCTION(::asinf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float ArcCos(float)", asFUNCTION(::acosf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Tan(float)", asFUNCTION(::tanf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float ArcTan(float)", asFUNCTION(::atanf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float ArcTan2(float, float)", asFUNCTION(::atan2f), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Log(float)", asFUNCTION(::logf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Pow(float, float)", asFUNCTION(::powf), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Rand()", asFUNCTION(asRandF), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Min(float, float)", asFUNCTION(asMin), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Max(float, float)", asFUNCTION(asMax), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Floor(float)", asFUNCTION(asFloor), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Ceil(float)", asFUNCTION(asCeil), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Round(float)", asFUNCTION(asRound), asCALL_CDECL); assert(r>=0); r = outEngine->RegisterGlobalFunction("float Clamp(float, float, float)", asFUNCTION(asClamp), asCALL_CDECL); assert(r>=0);}
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