math.h

#ifndef REIS_INCLUDE_MATH_H_
#define REIS_INCLUDE_MATH_H_
 
#include <reis/base.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define PI 141592653589f
 
#define rsC
 
int isNum(const char *str);
 
// OpenGL Mathematics
 
#include <GL/gl.h>
 
typedef struct { GLfloat x, y; } vec2;
typedef struct { GLfloat x, y, z; } vec3;
typedef struct { GLfloat x, y, z, w; } vec4;
 
typedef struct { GLfloat a[3*3]; } mat3;
typedef struct { GLfloat a[4*4]; } mat4;
 
typedef struct { GLfloat x, y, w, h; } rect;
 
static inline vec2 rsNewvec2( GLfloat x, GLfloat y ) { return (vec2) {x, y}; }
static inline vec3 rsNewvec3( GLfloat x, GLfloat y, GLfloat z ) { 
        return (vec3) {x, y, z}; 
}
static inline vec4 rsNewvec4( GLfloat x, GLfloat y, GLfloat z, GLfloat w ) { 
        return (vec4) {x, y, z, w}; 
}
static inline rect rsNewrect( GLfloat x, GLfloat y, GLfloat w, GLfloat h ) { 
        return (rect) {x, y, w, h}; 
}
 
mat3 mat3_identity( void );
mat4 mat4_identity( void );
 
mat4 mat4_ortho( GLfloat left, GLfloat right, GLfloat bot, 
                                 GLfloat top, GLfloat near, GLfloat far );
 
#ifdef __cplusplus
}
#endif
 
#endif