NvBlastMath.h

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#ifndef NVBLASTMATH_H
#define NVBLASTMATH_H

#include <math.h>

namespace Nv
{
namespace Blast
{

namespace VecMath
{


NV_INLINE void div(float a[3], float divisor)
{
    for (int i = 0; i < 3; i++)
        a[i] /= divisor;
}

NV_INLINE void mul(float a[3], float multiplier)
{
    for (int i = 0; i < 3; i++)
        a[i] *= multiplier;
}

NV_INLINE void add(const float a[3], float b[3])
{
    for (int i = 0; i < 3; i++)
        b[i] = a[i] + b[i];
}
    
NV_INLINE void add(const float a[3], const float b[3], float r[3])
{
    for (int i = 0; i < 3; i++)
        r[i] = a[i] + b[i];
}

NV_INLINE void sub(const float a[3], const float b[3], float r[3])
{
    for (int i = 0; i < 3; i++)
        r[i] = a[i] - b[i];
}

NV_INLINE float dot(const float a[3], const float b[3])
{
    float r = 0;
    for (int i = 0; i < 3; i++)
        r += a[i] * b[i];
    return r;
}

NV_INLINE float length(const float a[3])
{
    return sqrtf(dot(a, a));
}

NV_INLINE float dist(const float a[3], const float b[3])
{
    float v[3];
    sub(a, b, v);
    return length(v);
}

NV_INLINE float normal(const float a[3], float r[3])
{
    float d = length(a);
    for (int i = 0; i < 3; i++)
        r[i] = a[i] / d;

    return d;
}


} // namespace VecMath

} // namespace Blast
} // namespace Nv


#endif // #ifndef NVBLASTMATH_H