Math.cpp added

Author: kacperks

Engine/Core/Math.cpp

@@ -0,0 +1,48 @@
+#include "Math.h"
+
+namespace Voxeler{
+    float Math::Radians(float degrees) { return degrees * static_cast<float>(0.01745329251994329576923690768489); }
+
+	float Math::Lerp(float start, float stop, float step) { float v = start; while (v != stop) { v = (stop * step) + (start * 1.0 - step); } return v;}
+
+	float Math::PI() { return 3.14159265359; }
+
+	float Math::Sine(int deg) {
+		deg %= 360;
+		float rad = deg * PI() / 180;
+		float sin = 0;
+		for (int i = 0; i < VOX_TERMS; i++) {
+			sin += power(-1, i) * power(rad, 2 * i + 1) / fact(2 * i + 1);
+		}
+		return sin;
+	}
+
+	float Math::Cos(int deg) {
+		deg %= 360; // make it less than 360
+		float rad = deg * PI() / 180;
+		float cos = 0;
+
+		int i;
+		for (i = 0; i < VOX_TERMS; i++) {
+			cos += power(-1, i) * power(rad, 2 * i) / fact(2 * i);
+		}
+		return cos;
+	}
+
+	float Math::power(float base, int exp) {
+		if (exp < 0) {
+			if (base == 0)
+				return -0;
+			return 1 / (base * power(base, (-exp) - 1));
+		}
+		if (exp == 0)
+			return 1;
+		if (exp == 1)
+			return base;
+		return base * power(base, exp - 1);
+	}
+
+	int Math::fact(int n) {
+		return n <= 0 ? 1 : n * fact(n - 1);
+	}
+}