#ifndef __LINEAR__
#define __LINEAR__

#ifndef M_PI
#define M_PI (3.14159265358979323846)
#endif

typedef struct {
    float matrix[4][4];
} Mat4;

typedef struct {
    float vector[3];
} Vec3;

Mat4 linearTranslatev(Vec3 translate_vector);
Mat4 linearRotatev(float degree, Vec3 rotation_axis);
Mat4 linearScalev(Vec3 scale_vector);
Mat4 linearTranslate(float translate_x, float translate_y, float translate_z);
Mat4 linearScale(float scale_x, float scale_y, float scale_z);
Mat4 linearRotate(float degree, float rotate_x, float rotate_y, float rotate_z);
Mat4 linearPerspective(float FoV, float ratio, float near, float far);
Mat4 linearLookAt(Vec3 position, Vec3 target, Vec3 up);

Mat4 linearMat4Fill(float value);
Mat4 linearMat4Identity(float value);
Mat4 linearMat4Mul(Mat4 x1, Mat4 x2);
Mat4 linearMat4Muln(int n, ...);
Mat4 linearMat4Transpose(Mat4 x);
Mat4 linearMat4Inv(Mat4 x); //TODO
Mat4 linearMat4Add(Mat4 x1, Mat4 x2); //TODO
float linearMat4Det(Mat4 x); //TODO

Vec3 linearVec3(float x, float y, float z);
Vec3 linearVec3Normalize(Vec3 vector);
Vec3 linearVec3Add(Vec3 vector1, Vec3 vector2);
Vec3 linearVec3ScalarMulp(Vec3 vector, float scalar);
Vec3 linearVec3CrossProduct(Vec3 vector1, Vec3 vector2);
float linearVec3DotProduct(Vec3 vector1, Vec3 vector2);
#endif