linmath.h File Reference

Linear Algebra Math Library. More...

#include <math.h>

Go to the source code of this file.

Macros
#define	LINMATH_H_DEFINE_VEC(n)
#define	quat_norm   vec4_norm

Typedefs
typedef vec4	mat4x4[4]
typedef float	quat[4]

Detailed Description

Linear Algebra Math Library.

Provides optimized vector and matrix operations for 3D graphics:

Mathematical Operations:

• Vector operations (2D/3D/4D)
• Matrix transformations (4x4)
• Quaternion math
• Projection matrices
• Camera view transforms

Features:

• Header-only implementation
• SIMD-friendly data layouts
• Optimized algorithms
• Cross-platform support
• Efficient memory usage

Used throughout the GRIB plugin for coordinate transforms, viewports, and weather data visualization operations requiring 3D mathematics.

Definition in file linmath.h.

Macro Definition Documentation

LINMATH_H_DEFINE_VEC

#define LINMATH_H_DEFINE_VEC

(

n

)

Value:

  typedef float vec##n[n];                                                     \
  static inline void vec##n##_add(vec##n r, vec##n const a, vec##n const b) {  \
    int i;                                                                     \
    for (i = 0; i < n; ++i) r[i] = a[i] + b[i];                                \
  }                                                                            \
  static inline void vec##n##_sub(vec##n r, vec##n const a, vec##n const b) {  \
    int i;                                                                     \
    for (i = 0; i < n; ++i) r[i] = a[i] - b[i];                                \
  }                                                                            \
  static inline void vec##n##_scale(vec##n r, vec##n const v, float const s) { \
    int i;                                                                     \
    for (i = 0; i < n; ++i) r[i] = v[i] * s;                                   \
  }                                                                            \
  static inline float vec##n##_mul_inner(vec##n const a, vec##n const b) {     \
    float p = 0.;                                                              \
    int i;                                                                     \
    for (i = 0; i < n; ++i) p += b[i] * a[i];                                  \
    return p;                                                                  \
  }                                                                            \
  static inline float vec##n##_len(vec##n const v) {                           \
    return (float)sqrt(vec##n##_mul_inner(v, v));                              \
  }                                                                            \
  static inline void vec##n##_norm(vec##n r, vec##n const v) {                 \
    float k = 1.f / vec##n##_len(v);                                           \
    vec##n##_scale(r, v, k);                                                   \
  }

Definition at line 51 of file linmath.h.

quat_norm

#define quat_norm   vec4_norm

Definition at line 463 of file linmath.h.

Typedef Documentation

mat4x4

typedef vec4 mat4x4[4]

Definition at line 108 of file linmath.h.

quat

typedef float quat[4]

Definition at line 419 of file linmath.h.