/*
Copyright (c) 2008, Luke Benstead.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef MAT4_H_INCLUDED
#define MAT4_H_INCLUDED

#include "utility.h"

struct kmVec3;
struct kmMat3;
struct kmQuaternion;
struct kmPlane;

/*
A 4x4 matrix

        | 0   4   8  12 |
mat = | 1   5   9  13 |
        | 2   6  10  14 |
        | 3   7  11  15 |
*/

#ifdef __cplusplus
extern "C" {
#endif

typedef struct kmMat4 {
	kmScalar mat[16];
} kmMat4;

kmMat4* kmMat4Fill(kmMat4* pOut, const kmScalar* pMat);


kmMat4* kmMat4Identity(kmMat4* pOut);

kmMat4* kmMat4Inverse(kmMat4* pOut, const kmMat4* pM);


int kmMat4IsIdentity(const kmMat4* pIn);

kmMat4* kmMat4Transpose(kmMat4* pOut, const kmMat4* pIn);
kmMat4* kmMat4Multiply(kmMat4* pOut, const kmMat4* pM1, const kmMat4* pM2);

kmMat4* kmMat4Assign(kmMat4* pOut, const kmMat4* pIn);
kmMat4* kmMat4AssignMat3(kmMat4* pOut, const struct kmMat3* pIn);

int kmMat4AreEqual(const kmMat4* pM1, const kmMat4* pM2);

kmMat4* kmMat4RotationX(kmMat4* pOut, const kmScalar radians);
kmMat4* kmMat4RotationY(kmMat4* pOut, const kmScalar radians);
kmMat4* kmMat4RotationZ(kmMat4* pOut, const kmScalar radians);
kmMat4* kmMat4RotationYawPitchRoll(kmMat4* pOut, const kmScalar pitch, const kmScalar yaw, const kmScalar roll);
kmMat4* kmMat4RotationQuaternion(kmMat4* pOut, const struct kmQuaternion* pQ);
kmMat4* kmMat4RotationTranslation(kmMat4* pOut, const struct kmMat3* rotation, const struct kmVec3* translation);
kmMat4* kmMat4Scaling(kmMat4* pOut, const kmScalar x, const kmScalar y, const kmScalar z);
kmMat4* kmMat4Translation(kmMat4* pOut, const kmScalar x, const kmScalar y, const kmScalar z);

struct kmVec3* kmMat4GetUpVec3(struct kmVec3* pOut, const kmMat4* pIn);
struct kmVec3* kmMat4GetRightVec3(struct kmVec3* pOut, const kmMat4* pIn);
struct kmVec3* kmMat4GetForwardVec3RH(struct kmVec3* pOut, const kmMat4* pIn);
struct kmVec3* kmMat4GetForwardVec3LH(struct kmVec3* pOut, const kmMat4* pIn);

kmMat4* kmMat4PerspectiveProjection(kmMat4* pOut, kmScalar fovY, kmScalar aspect, kmScalar zNear, kmScalar zFar);
kmMat4* kmMat4OrthographicProjection(kmMat4* pOut, kmScalar left, kmScalar right, kmScalar bottom, kmScalar top, kmScalar nearVal, kmScalar farVal);
kmMat4* kmMat4LookAt(kmMat4* pOut, const struct kmVec3* pEye, const struct kmVec3* pCenter, const struct kmVec3* pUp);

kmMat4* kmMat4RotationAxisAngle(kmMat4* pOut, const struct kmVec3* axis, kmScalar radians);
struct kmMat3* kmMat4ExtractRotation(struct kmMat3* pOut, const kmMat4* pIn);
struct kmPlane* kmMat4ExtractPlane(struct kmPlane* pOut, const kmMat4* pIn, const kmEnum plane);
struct kmVec3* kmMat4RotationToAxisAngle(struct kmVec3* pAxis, kmScalar* radians, const kmMat4* pIn);
#ifdef __cplusplus
}
#endif
#endif /* MAT4_H_INCLUDED */