Here, we should describe a couple of functions used in control calculations.
In the preceding code, we used the ClampVec2() routine, which calculates the length of a vector V, compares this length to MaxValue, and returns either the same vector V or its clamped coaxial version of the MaxValue length:
inline vec2 ClampVec2(const vec2& V, float MaxValue)
{
float L = V.Length();
return (L > MaxValue) ? V.GetNormalized() * MaxValue : V;
}Another bunch of methods include random number generation routines. The RandomFloat() method uses the C++11 standard library to generate uniformly distributed floating-point values in the 0…1 interval:
std::random_device rd;
std::mt19937 gen( rd() );
std::uniform_real_distribution<> dis( 0.0, 1.0 );
float RandomFloat()
{
return static_cast<float>( dis( gen ) );
}The RandomVec2Range() method uses the RandomFloat() function twice to return a vector with random components within a specified interval:
vec2 RandomVec2Range...