=encoding UTF-8


=head1 NAME

BH_Vec3f - three-dimensional real vector


=head1 SYNTAX

 #include <BH/Math.h>

 cc prog.c -o prog -lbh


=head1 DESCRIPTION

The BH_Vec3f module provides a set of functions for working with
three-dimensional vectors. The functions allow performing arithmetic operations,
calculating scalar and vector products, normalizing vectors, and performing
other vector operations.


=head1 API CALLS


=head2 BH_Vec3fAdd

 void BH_Vec3fAdd(const float a[3],
                  const float b[3],
                  float out[3]);

Calculates the sum of two vectors I<a> and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fSub

 void BH_Vec3fSub(const float a[3],
                  const float b[3],
                  float out[3]);

Calculates the difference between two vectors I<a> and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fMul

 void BH_Vec3fMul(const float a[3],
                  const float b[3],
                  float out[3]);

Calculates the result of multiplying two vectors I<a> and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fScale

 void BH_Vec3fScale(const float a[3],
                    float b,
                    float out[3]);

Calculates the result of multiplying vector I<a> by value I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fMulAdd

 void BH_Vec3fMulAdd(const float a[3],
                     const float b[3],
                     const float c[3],
                     float out[3]);

Calculates the result of the sum I<c> and the result of multiplying vectors I<a>
and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fNegate

 void BH_Vec3fNegate(const float in[3],
                     float out[3]);

Calculates the opposite vector from vector I<in>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fDot

 float BH_Vec3fDot(const float a[3],
                   const float b[3]);

Calculates the dot product of vectors I<a> and I<b>.


=head2 BH_Vec3fCross

 void BH_Vec3fCross(const float a[3],
                    const float b[3],
                    float out[3]);

Calculates the cross product of vectors I<a> and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fLength

 float BH_Vec3fLength(const float in[3]);

Calculates the length of vector I<in>.


=head2 BH_Vec3fNormal

 void BH_Vec3fNormal(const float in[3],
                     float out[3]);

Calculates the normalized form of vector I<in>.


=head2 BH_Vec3fNormalEx

 float BH_Vec3fNormalEx(const float in[3],
                        float out[3]);

Calculates the normalized form of vector I<in> and returns its original length.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fMin

 void BH_Vec3fMin(const float a[3],
                  const float b[3],
                  float out[3]);

Calculates the element-wise minimum of two vectors I<a> and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fMax

 void BH_Vec3fMax(const float a[3],
                  const float b[3],
                  float out[3]);

Calculates the element-wise maximum of two vectors I<a> and I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fLerp

 void BH_Vec3fLerp(const float a[3],
                   const float b[3],
                   float t,
                   float out[3]);

Performs linear interpolation between two vectors I<a> and I<b> with parameter
I<t>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fProject

 void BH_Vec3fProject(const float a[3],
                      const float b[3],
                      float out[3]);

Calculates the result of projecting vector I<a> onto vector I<b>.

The I<out> parameter describes the resulting vector.


=head2 BH_Vec3fBarycentric

 void BH_Vec3fBarycentric(const float a[3],
                          const float b[3],
                          const float c[3],
                          float v,
                          float w,
                          float out[3]);

Calculates the vector from barycentric coordinates I<v>, I<w> and vectors of
points I<a>, I<b>, I<c>.

The calculation is performed using the formula A + v*(B-A) + w*(C-A).

The I<out> parameter describes the resulting vector.


=head1 SEE ALSO

L<BH>