#include <gpac/maths.h>

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Macros
#define	DISABLE_MATHS

#define	CHECK_MATRIX

#define	SWAP_ROWS(a, b) { Fixed *_tmp = a; (a)=(b); (b)=_tmp; }

#define	XPLANE 0

#define	YPLANE 1

#define	ZPLANE 2

Functions
GF_EXPORT u32	gf_get_bit_size (u32 MaxVal)
	Field bit-size.

GF_EXPORT void	gf_irect_union (GF_IRect rc1, GF_IRect rc2)

GF_EXPORT GF_Point2D	gf_v2d_from_polar (Fixed length, Fixed angle)
	2D vector from polar coordinates

GF_EXPORT Fixed	gf_v2d_len (GF_Point2D *vec)
	get 2D vector length

GF_EXPORT Fixed	gf_v2d_distance (GF_Point2D a, GF_Point2D b)
	get distance between 2 points

GF_EXPORT Fixed	gf_angle_diff (Fixed angle1, Fixed angle2)

GF_EXPORT void	gf_mx2d_add_matrix (GF_Matrix2D _this, GF_Matrix2D from)
	2D matrix multiplication

GF_EXPORT void	gf_mx2d_pre_multiply (GF_Matrix2D _this, GF_Matrix2D with)
	2D matrix pre-multiplication

GF_EXPORT void	gf_mx2d_add_translation (GF_Matrix2D *_this, Fixed cx, Fixed cy)
	matrix translating

GF_EXPORT void	gf_mx2d_add_rotation (GF_Matrix2D *_this, Fixed cx, Fixed cy, Fixed angle)
	matrix rotating

GF_EXPORT void	gf_mx2d_add_scale (GF_Matrix2D *_this, Fixed scale_x, Fixed scale_y)
	matrix scaling

GF_EXPORT void	gf_mx2d_add_scale_at (GF_Matrix2D *_this, Fixed scale_x, Fixed scale_y, Fixed cx, Fixed cy, Fixed angle)
	matrix uncentered scaling

GF_EXPORT void	gf_mx2d_add_skew (GF_Matrix2D *_this, Fixed skew_x, Fixed skew_y)
	matrix skewing

GF_EXPORT void	gf_mx2d_add_skew_x (GF_Matrix2D *_this, Fixed angle)
	matrix horizontal skewing

GF_EXPORT void	gf_mx2d_add_skew_y (GF_Matrix2D *_this, Fixed angle)
	matrix vertical skewing

GF_EXPORT void	gf_mx2d_inverse (GF_Matrix2D *_this)
	matrix inversing

GF_EXPORT Bool	gf_mx2d_decompose (GF_Matrix2D mx, GF_Point2D scale, Fixed rotate, GF_Point2D translate)
	matrix decomposition

GF_EXPORT void	gf_mx2d_apply_coords (GF_Matrix2D _this, Fixed x, Fixed *y)
	matrix coordinate transformation

GF_EXPORT void	gf_mx2d_apply_point (GF_Matrix2D _this, GF_Point2D pt)
	matrix point transformation

GF_EXPORT void	gf_mx2d_apply_rect (GF_Matrix2D _this, GF_Rect rc)
	matrix rectangle transformation

GF_EXPORT GF_IRect	gf_rect_pixelize (GF_Rect *r)
	gets the pixelized version of a rectangle

GF_EXPORT void	gf_rect_union (GF_Rect rc1, GF_Rect rc2)
	rectangle union

GF_EXPORT GF_Rect	gf_rect_center (Fixed w, Fixed h)
	centers a rectangle

GF_EXPORT Bool	gf_rect_overlaps (GF_Rect rc1, GF_Rect rc2)
	rectangle overlap test

GF_EXPORT Bool	gf_rect_equal (GF_Rect rc1, GF_Rect rc2)
	rectangle identity test

GF_EXPORT void	gf_rect_intersect (GF_Rect rc1, GF_Rect rc2)
	rectangle intersection

GF_EXPORT Fixed	gf_vec_len_p (GF_Vec *v)
	get 3D vector length

GF_EXPORT Fixed	gf_vec_len (GF_Vec v)
	get 3D vector length

GF_EXPORT Fixed	gf_vec_lensq_p (GF_Vec *v)
	get 3D vector square length

GF_EXPORT Fixed	gf_vec_lensq (GF_Vec v)
	get 3D vector square length

GF_EXPORT Fixed	gf_vec_dot_p (GF_Vec v1, GF_Vec v2)
	get 3D vector dot product

GF_EXPORT Fixed	gf_vec_dot (GF_Vec v1, GF_Vec v2)
	get 3D vector dot product

GF_EXPORT void	gf_vec_norm (GF_Vec *v)
	vector normalization

GF_EXPORT GF_Vec	gf_vec_scale_p (GF_Vec *v, Fixed f)
	vector scaling

GF_EXPORT GF_Vec	gf_vec_scale (GF_Vec v, Fixed f)
	vector scaling

GF_EXPORT GF_Vec	gf_vec_cross_p (GF_Vec v1, GF_Vec v2)
	vector cross product

GF_EXPORT GF_Vec	gf_vec_cross (GF_Vec v1, GF_Vec v2)
	vector cross product

GF_EXPORT void	gf_mx2d_from_mx (GF_Matrix2D mat2D, GF_Matrix mat)
	matrix to 2D matrix

GF_EXPORT void	gf_mx_apply_rect (GF_Matrix mat, GF_Rect rc)
	matrix rectangle transformation

GF_EXPORT void	gf_mx_add_matrix (GF_Matrix mat, GF_Matrix mul)
	matrices multiplication

GF_EXPORT void	gf_mx_add_matrix_2d (GF_Matrix mat, GF_Matrix2D mat2D)
	2D matrix multiplication

GF_EXPORT void	gf_mx_add_translation (GF_Matrix *mat, Fixed tx, Fixed ty, Fixed tz)
	matrix translation

GF_EXPORT void	gf_mx_add_scale (GF_Matrix *mat, Fixed sx, Fixed sy, Fixed sz)
	matrix scaling

GF_EXPORT void	gf_mx_add_rotation (GF_Matrix *mat, Fixed angle, Fixed x, Fixed y, Fixed z)
	matrix rotating

GF_EXPORT void	gf_mx_from_mx2d (GF_Matrix mat, GF_Matrix2D mat2D)
	matrix constructor from 2D

GF_EXPORT Bool	gf_mx_equal (GF_Matrix mx1, GF_Matrix mx2)
	matrix equality testing

GF_EXPORT void	gf_mx_inverse (GF_Matrix *mx)
	affine matrix inversion

GF_EXPORT void	gf_mx_transpose (GF_Matrix *mx)
	transpose 4x4 matrix

GF_EXPORT void	gf_mx_apply_vec (GF_Matrix mx, GF_Vec pt)
	matrix point transformation

GF_EXPORT void	gf_mx_ortho (GF_Matrix *mx, Fixed left, Fixed right, Fixed bottom, Fixed top, Fixed z_near, Fixed z_far)
	ortho matrix construction

GF_EXPORT void	gf_mx_ortho_reverse_z (GF_Matrix *mx, Fixed left, Fixed right, Fixed bottom, Fixed top, Fixed z_near, Fixed z_far)
	ortho matrix with reverse Z construction

GF_EXPORT void	gf_mx_perspective (GF_Matrix *mx, Fixed fieldOfView, Fixed aspectRatio, Fixed z_near, Fixed z_far)
	perspective matrix construction

GF_EXPORT void	gf_mx_perspective_reverse_z (GF_Matrix *mx, Fixed fieldOfView, Fixed aspectRatio, Fixed z_near, Fixed z_far)
	perspective matrix with reverse Z construction

GF_EXPORT void	gf_mx_lookat (GF_Matrix *mx, GF_Vec eye, GF_Vec center, GF_Vec upVector)
	creates look matrix

GF_Vec4	gf_quat_from_matrix (GF_Matrix *mx)

GF_EXPORT void	gf_mx_get_yaw_pitch_roll (GF_Matrix mx, Fixed yaw, Fixed pitch, Fixed roll)
	matrix yaw pitch roll decomposition

GF_EXPORT void	gf_mx_decompose (GF_Matrix mx, GF_Vec translate, GF_Vec scale, GF_Vec4 rotate, GF_Vec *shear)
	matrix decomposition

GF_EXPORT void	gf_mx_apply_bbox_sphere (GF_Matrix mx, GF_BBox box)
	matrix box sphere transformation

GF_EXPORT void	gf_mx_apply_bbox (GF_Matrix mx, GF_BBox box)
	matrix box transformation

GF_EXPORT void	gf_mx_apply_bbox_4x4 (GF_Matrix mx, GF_BBox box)
	matrix box transformation

GF_EXPORT void	gf_mx_rotate_vector (GF_Matrix mx, GF_Vec pt)
	matrix vector rotation

GF_EXPORT void	gf_mx_rotation_matrix_from_vectors (GF_Matrix *mx, GF_Vec x, GF_Vec y, GF_Vec z)
	matrix initialization from vectors

GF_EXPORT void	gf_mx_add_matrix_4x4 (GF_Matrix mat, GF_Matrix mul)
	non-affine matrix multiplication

GF_EXPORT void	gf_mx_apply_vec_4x4 (GF_Matrix mx, GF_Vec4 vec)
	matrix 4D vector transformation

GF_EXPORT Bool	gf_mx_inverse_4x4 (GF_Matrix *mx)
	non-affine matrix inversion

GF_EXPORT Bool	gf_plane_intersect_line (GF_Plane plane, GF_Vec linepoint, GF_Vec linevec, GF_Vec outPoint)
	plane line intersection

GF_EXPORT GF_Ray	gf_ray (GF_Vec start, GF_Vec end)
	ray constructor

GF_EXPORT void	gf_mx_apply_ray (GF_Matrix mx, GF_Ray r)
	matrix ray transformation

GF_EXPORT Bool	gf_ray_hit_box (GF_Ray ray, GF_Vec box_min, GF_Vec box_max, GF_Vec outPoint)
	ray box intersection test

GF_EXPORT Bool	gf_ray_hit_sphere (GF_Ray ray, GF_Vec center, Fixed radius, GF_Vec *outPoint)
	ray sphere intersection test

GF_EXPORT Bool	gf_ray_hit_triangle (GF_Ray ray, GF_Vec v0, GF_Vec v1, GF_Vec v2, Fixed *dist)
	ray triangle intersection test

GF_EXPORT GF_Vec	gf_closest_point_to_line (GF_Vec line_pt, GF_Vec line_vec, GF_Vec pt)
	closest point on a line

GF_EXPORT GF_Vec4	gf_quat_to_rotation (GF_Vec4 *quat)
	quaternion to rotation

GF_EXPORT GF_Vec4	gf_quat_from_rotation (GF_Vec4 rot)
	quaternion from rotation

GF_EXPORT GF_Vec4	gf_quat_from_axis_cos (GF_Vec axis, Fixed cos_a)
	quaternion from axis and cos

static void	gf_quat_conjugate (GF_Vec4 *quat)

GF_EXPORT GF_Vec4	gf_quat_get_inv (GF_Vec4 *quat)

GF_EXPORT GF_Vec4	gf_quat_multiply (GF_Vec4 q1, GF_Vec4 q2)
	quaternion multiplication

GF_EXPORT GF_Vec	gf_quat_rotate (GF_Vec4 quat, GF_Vec vec)
	quaternion vector rotating

GF_EXPORT GF_Vec4	gf_quat_slerp (GF_Vec4 q1, GF_Vec4 q2, Fixed frac)
	quaternion interpolation

GF_EXPORT void	gf_bbox_refresh (GF_BBox *b)

GF_EXPORT void	gf_bbox_from_rect (GF_BBox box, GF_Rect rc)

GF_EXPORT void	gf_rect_from_bbox (GF_Rect rc, GF_BBox box)

GF_EXPORT void	gf_bbox_grow_point (GF_BBox *box, GF_Vec pt)
	bounding box expansion

GF_EXPORT void	gf_bbox_union (GF_BBox b1, GF_BBox b2)

GF_EXPORT Bool	gf_bbox_equal (GF_BBox b1, GF_BBox b2)

GF_EXPORT Bool	gf_bbox_point_inside (GF_BBox box, GF_Vec p)

GF_EXPORT void	gf_bbox_get_vertices (GF_Vec bmin, GF_Vec bmax, GF_Vec *vecs)
	get box vertices

GF_EXPORT void	gf_mx_apply_plane (GF_Matrix mx, GF_Plane plane)
	matrix plane transformation

GF_EXPORT Fixed	gf_plane_get_distance (GF_Plane plane, GF_Vec p)
	point to plane distance

GF_EXPORT u32	gf_plane_get_p_vertex_idx (GF_Plane *p)
	box p-vertex index

GF_EXPORT u32	gf_bbox_plane_relation (GF_BBox box, GF_Plane p)
	box-plane relation

GF_EXPORT u32	gf_get_next_pow2 (u32 s)
	Get power of 2.

Macro Definition Documentation

◆ DISABLE_MATHS

#define DISABLE_MATHS

◆ CHECK_MATRIX

#define CHECK_MATRIX

◆ SWAP_ROWS

#define SWAP_ROWS	(	a,
		b
	)	{ Fixed *_tmp = a; (a)=(b); (b)=_tmp; }

◆ XPLANE

#define XPLANE 0

◆ YPLANE

#define YPLANE 1

◆ ZPLANE

#define ZPLANE 2

Function Documentation

◆ gf_quat_from_matrix()

GF_EXPORT GF_Vec4 gf_quat_from_matrix ( GF_Matrix * mx )

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◆ gf_quat_conjugate()

static void gf_quat_conjugate ( GF_Vec4 * quat )

static