src/normals.h File Reference

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Defines
#define	_NORMALS_H_
Functions
double	vectorLength (float vector[3])
void	normalize (float normalVector[3])
void	crossProduct (float point1[3], float point2[3], float point3[3], float normal[3])

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Define Documentation

#define _NORMALS_H_

Definition at line 7 of file normals.h.

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Function Documentation

void crossProduct	(	float	point1[3],
		float	point2[3],
		float	point3[3],
		float	normal[3]
	)

Definition at line 24 of file normals.cpp.

Referenced by Terrain::CalcNormals().

                                                                                      {
  float vector1[3], vector2[3];

  vector1[0] = point1[0] - point2[0];
  vector1[1] = point1[1] - point2[1];
  vector1[2] = point1[2] - point2[2];

  vector2[0] = point2[0] - point3[0];
  vector2[1] = point2[1] - point3[1];
  vector2[2] = point2[2] - point3[2];

  normal[0] = vector1[1]*vector2[2] - vector1[2]*vector2[1];
  normal[1] = vector1[2]*vector2[0] - vector1[0]*vector2[2];
  normal[2] = vector1[0]*vector2[1] - vector1[1]*vector2[0];
}

void normalize

(

float

normalVector[3]

)

Definition at line 14 of file normals.cpp.

References vectorLength().

Referenced by Terrain::CalcNormals(), and Terrain::CalcNormals2().

                                      {
  double length;

  length = vectorLength(normalVector);

  for (int x = 0; x < 3; x++) {
    normalVector[x] /=length;
  }
}

double vectorLength

(

float

vector[3]

)

Definition at line 8 of file normals.cpp.

Referenced by normalize().

                                     {
  return sqrt((vector[0]*vector[0]) +
        (vector[1]*vector[1]) +
        (vector[2]*vector[2]));
}

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