mirror of https://git.rip/DMCA_FUCKER/re3.git
53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
#pragma once
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class CGeneral
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{
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public:
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static float GetATanOfXY(float x, float y){
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// why exactly doesn't this work?
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// if(y >= 0.0f) return atan2(x, y);
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// return atan2(x, y) + 2*M_PI;
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if(x == 0.0f && y == 0.0f)
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return 0.0f;
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float xabs = fabs(x);
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float yabs = fabs(y);
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if(xabs < yabs){
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if(y > 0.0f){
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if(x > 0.0f)
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return 0.5f*PI - atan2(x / y, 1.0f);
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else
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return 0.5f*PI + atan2(-x / y, 1.0f);
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}else{
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if(x > 0.0f)
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return 1.5f*PI + atan2(x / -y, 1.0f);
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else
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return 1.5f*PI - atan2(-x / -y, 1.0f);
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}
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}else{
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if(y > 0.0f){
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if(x > 0.0f)
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return atan2(y / x, 1.0f);
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else
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return PI - atan2(y / -x, 1.0f);
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}else{
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if(x > 0.0f)
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return 2.0f*PI - atan2(-y / x, 1.0f);
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else
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return PI + atan2(-y / -x, 1.0f);
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}
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}
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}
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// not too sure about all these...
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static uint16 GetRandomNumber(void)
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{ return myrand() & 0xFFFF; }
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// Probably don't want to ever reach high
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static float GetRandomNumberInRange(float low, float high)
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{ return low + (high - low)*(GetRandomNumber()/65536.0f); }
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static Int32 GetRandomNumberInRange(Int32 low, Int32 high)
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{ return low + (high - low)*(GetRandomNumber()/65536.0f); }
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};
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