Merge "Limit dotProduct value to 1.0f, so acosf would not return NaN."

#include <math.h>

#include <utils/Log.h>

#include <utils/Trace.h>

#include <utils/MathUtils.h>

#include "AmbientShadow.h"

#include "Caches.h"

    // acos( )     --- [0, M_PI]

    // floor(...)  --- [0, EXTRA_VERTEX_PER_PI]

    float dotProduct = vector1.dot(vector2);

    // make sure that dotProduct value is in acsof input range [-1, 1]

    dotProduct = MathUtils::clamp(dotProduct, -1.0f, 1.0f);

    // TODO: Use look up table for the dotProduct to extraVerticesNumber

    // computation, if needed.

    float angle = acosf(dotProduct);