#ifndef NEBU_GEOM_H
#define NEBU_GEOM_H

/* some geometric routines always needed */

/*
typedef struct {
  float v[4];
} vec4;

typedef struct {
  float v[3];
} vec3;
*/

typedef struct {
  int vertex[3];
  int normal[3];
  int material;
} face;

typedef struct {
 int vertex[4];
 int normal[4];
 int material;
} quadFace;

float length2(float *v);
float length3(float *v);
float length4(float *v);
float length(float *v);
void normalize(float *v);
void normalize4(float *v);
void crossprod(float *v1, float *v2, float *out);
void normcrossprod(float *v1, float *v2, float *out);
float scalarprod(float *v1, float *v2);
float scalarprod2(float *v1, float *v2);
float scalarprod4(float *v1, float *v2);
void vsub(float *v1, float *v2, float *out);
void vsub2(float *v1, float *v2, float *out);
void vsub4(float *v1, float *v2, float *out);
void vadd(float *v1, float *v2, float *out);
void vadd2(float *v1, float *v2, float *out);
void vadd4(float *v1, float *v2, float *out);
void vcopy(float *v1, float *out);
void vcopy4(float *v1, float *out);
void vmul(float *v, float f);

#endif