How to determine whether a float/double is a valid value

A few days ago, the game program exploded in the triangle collision test.

The result shows that D3DXIntersectTri returns a float (-1. # INF000) to me ).

I believe everyone is familiar with this value.

This value usually occurs when the divisor is 0, that is, the denominator is 0.

Like this:

Float a =. 7f;

Float B =. 0f;

A/= B;

 

So how can we determine whether a float/double value is (-1. # INF000?

The answer is yes.

 

We found that when a is-1. # INF000;

A performs any operation on its own.

 

So.

It is very simple, according to the example above.

When a/= B is executed, a is already =-1. # INF000

Let's judge:

If (a + 1 = a-1)

Return true; // indicates an invalid number.

 

In fact, the conclusion is that a + any number =;