int solvequadratic(float a, float b, float c, float &t1, float &t2)
int solvequadratic(float a, float b, float c, vector2 &t1, vector2 &t2)
Solves the given quadratic function where a , b, and c are the coefficients as so:
ax^2 + bx + c = 0.
Returns the number of real roots.
In the real case t1 and t2 are filled such that t1 ≤ t2. If there is only one root then t1 = t2. If there are no roots then t1 = t2 and is the projection of the vertex of the quadratic function onto the x-axis.
In the complex case t1 and t2 are the complex roots.