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92 lines
1.7 KiB
92 lines
1.7 KiB
#ifndef MATH_CPP
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#define MATH_CPP
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#include <cmath>
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#include "math.hpp"
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float distanceTo(float aX, float aY, float bX, float bY)
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{
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//ax-bx sq + ay-by sq
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float x=aX-bX;
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float y=aY-bY;
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return sqrtf(x*x + y*y);
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}
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float manhattanTo(float aX, float aY, float bX, float bY)
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{
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//ax-bx abs + ay-by abs
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float x=aX-bX;
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float y=aY-bY;
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return fabs(x) + fabs(y);
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}
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float pointTowards(float aX, float aY, float bX, float bY)
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{
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return radToDeg(atan2f((bY-aY) , (bX-aX)));
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}
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float magnitude(float x, float y)
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{
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return distanceTo(0, 0, x, y);
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}
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void normalize(coordinate* toNormalize)
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{
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float length=magnitude(toNormalize->x, toNormalize->y);
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if (length > 0)
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{
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toNormalize->x/=length;
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toNormalize->y/=length;
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}
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}
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coordinate getVectorNormal(float x, float y, bool right)
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{
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coordinate returnCoord;
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if (!right)
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{
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returnCoord.x=-y;
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returnCoord.y=x;
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}
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else
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{
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returnCoord.x=y;
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returnCoord.y=-x;
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}
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return returnCoord;
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}
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coordinate getVectorNormal(coordinate* vectorIn, bool right)
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{
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coordinate returnCoord;
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if (!right)
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{
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returnCoord.x=-vectorIn->y;
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returnCoord.y=vectorIn->x;
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}
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else
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{
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returnCoord.x=vectorIn->y;
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returnCoord.y=-vectorIn->x;
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}
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return returnCoord;
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}
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float radToDeg(float radian)
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{
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//180/pi
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return radian*57.295779513;
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}
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float degToRad(float degree)
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{
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//pi/180
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return degree*0.017453278;
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}
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coordinate degToVec(float degree)
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{
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coordinate result;
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float radian=degToRad(degree);
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result.x=cosf(radian);
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result.y=sinf(radian);
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return result;
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}
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bool isVisible(int x, int y, int wX, int wY, int windowW, int windowH)
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{
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if (x + wX < 0 || y + wY < 0) return false;
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if (x > windowW || y > windowH) return false;
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return true;
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}
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#endif
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