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mirror of https://github.com/borgesdan/xn65 synced 2024-12-29 21:54:47 +01:00

Adiciona comentários a MathHelper

This commit is contained in:
Danilo 2024-09-10 14:21:44 -03:00
parent 5c72d95cfa
commit 5297e705a6

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@ -5,18 +5,25 @@
#include <cmath>
namespace xna {
//Contains commonly used precalculated values.
struct MathHelper {
//Represents the mathematical constant e.
static constexpr double E = 2.7182818284590451;
//Represents the value of pi.
static constexpr double PI = 3.1415926535897931;
static constexpr double TAU = 6.2831853071795862;
static constexpr double EPSILON = 4.94065645841247E-324;
//Converts degrees to radians.
static constexpr float ToRadians(float degrees) { return degrees * (static_cast<float>(PI) / 180.0f); }
//Converts radians to degrees.
static constexpr float ToDegrees(float radians) { return radians * 57.2957764F; }
//Calculates the absolute value of the difference of two values
static float Distance(float value1, float value2) { return std::abs(value1 - value2); }
//Returns the lesser of two values.
static constexpr float Min(float value1, float value2) { return (std::min)(value1, value2); }
//Returns the greater of two values.
static constexpr float Max(float value1, float value2) { return (std::max)(value1, value2); }
//Restricts a value to be within a specified range.
template <typename T>
static constexpr T Clamp(T value, T min, T max) {
value = value > max ? max : value;
@ -24,25 +31,30 @@ namespace xna {
return value;
}
//Linearly interpolates between two values.
static constexpr float Lerp(float value1, float value2, float amount) {
return value1 + (value2 - value1) * amount;
}
//Returns the Cartesian coordinate for one axis of a point that is defined by a given triangle and two normalized barycentric (areal) coordinates.
static constexpr float Barycentric(float value1, float value2, float value3, float amount1, float amount2) {
return value1 + amount1 * (value2 - value1) + amount2 * (value3 - value1);
}
//Interpolates between two values using a cubic equation.
static constexpr float SmoothStep(float value1, float value2, float amount) {
const auto num = Clamp(amount, 0.0f, 1.0f);
return Lerp(value1, value2, (num * num * (3.0F - 2.0F * num)));
}
//Performs a Catmull-Rom interpolation using the specified positions.
static constexpr float CatmullRom(float value1, float value2, float value3, float value4, float amount) {
const auto num1 = amount * amount;
const auto num2 = amount * num1;
return (0.5F * (2.0F * value2 + (-value1 + value3) * amount + (2.0F * value1 - 5.0F * value2 + 4.0F * value3 - value4) * num1 + (-value1 + 3.0F * value2 - 3.0F * value3 + value4) * num2));
}
//Performs a Hermite spline interpolation.
static constexpr float Hermite(float value1, float tangent1, float value2, float tangent2, float amount) {
const auto num1 = amount;
const auto num2 = num1 * num1;