added 3dengfx into the repo, probably not the correct version for this

[summerhack] / src / 3dengfx / src / n3dmath2 / n3dmath2.hpp

diff --git a/src/3dengfx/src/n3dmath2/n3dmath2.hpp b/src/3dengfx/src/n3dmath2/n3dmath2.hpp
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+++ b/src/3dengfx/src/n3dmath2/n3dmath2.hpp
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+/*
+Copyright 2004 John Tsiombikas <nuclear@siggraph.org>
+
+This file is part of the n3dmath2 library.
+
+The n3dmath2 library is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+The n3dmath2 library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the n3dmath2 library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef _N3DMATH2_HPP_
+#define _N3DMATH2_HPP_
+
+#include <math.h>
+#include "n3dmath2_types.hpp"
+
+extern const scalar_t e;
+
+extern const scalar_t pi;
+extern const scalar_t half_pi;
+extern const scalar_t quarter_pi;
+extern const scalar_t two_pi;
+extern const scalar_t three_half_pi;
+
+extern const scalar_t xsmall_number;
+extern const scalar_t small_number;
+
+extern const scalar_t error_margin;
+
+
+// basis vectors
+#define VECTOR3_I      (Vector3(1.0, 0.0, 0.0))
+#define VECTOR3_J      (Vector3(0.0, 1.0, 0.0))
+#define VECTOR3_K      (Vector3(0.0, 0.0, 1.0))
+
+#define VECTOR2_I      (Vector2(1.0, 0.0))
+#define VECTOR2_J      (Vector2(0.0, 1.0))
+
+// angle conversion
+#define RAD_TO_DEG(a) ((((scalar_t)a) * 360.0) / two_pi)
+//#define DEG_TO_RAD(a) ((((scalar_t)a) * two_pi) / 360.0)
+#define DEG_TO_RAD(a) (((scalar_t)a) * (pi / 180.0))
+
+#define SQ(x) ((x) * (x))
+
+#ifndef __GLIBC__
+#define round(x)       ((x) >= 0 ? (x) + 0.5 : (x) - 0.5)
+#endif // __GLIBC__
+
+// -- mathematical & helper functions --
+scalar_t frand(scalar_t range);
+scalar_t integral(scalar_t (*f)(scalar_t), scalar_t low, scalar_t high, int samples);
+scalar_t gaussian(scalar_t x, scalar_t mean, scalar_t sdev);
+
+// -- interpolation and approximation --
+inline scalar_t lerp(scalar_t a, scalar_t b, scalar_t t);
+
+scalar_t bspline(const Vector4 &cpvec, scalar_t t);
+inline scalar_t bspline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
+
+scalar_t catmull_rom_spline(const Vector4 &cpvec, scalar_t t);
+inline scalar_t catmull_rom_spline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
+
+scalar_t bezier(const Vector4 &cp, scalar_t t);
+Vector3 bezier(const Vector3 &p0, const Vector3 &p1, const Vector3 &p2, const Vector3 &p3, scalar_t t);
+Vector3 bezier_tangent(const Vector3 &p0, const Vector3 &p1, const Vector3 &p2, const Vector3 &p3, scalar_t t);
+
+// -- point / line distance in 2D --
+scalar_t dist_line(const Vector2 &p1, const Vector2 &p2, const Vector2 &p);
+
+// -- actual class definitions --
+#include "n3dmath2_vec.hpp"
+#include "n3dmath2_mat.hpp"
+#include "n3dmath2_qua.hpp"
+#include "n3dmath2_sph.hpp"
+#include "n3dmath2_ray.hpp"
+#include "n3dmath2_qdr.hpp"
+
+class Basis {
+public:
+       Vector3 i, j, k;
+
+       Basis();
+       Basis(const Vector3 &i, const Vector3 &j, const Vector3 &k);
+       Basis(const Vector3 &dir, bool LeftHanded=true);
+
+       void rotate(scalar_t x, scalar_t y, scalar_t z);
+       void rotate(const Vector3 &axis, scalar_t angle);
+       void rotate(const Matrix4x4 &mat);
+       void rotate(const Quaternion &quat);
+
+       Matrix3x3 create_rotation_matrix() const;
+};
+
+
+// bad ugly hack
+size_t size_of_scalar_type();
+
+#include "n3dmath2.inl"
+
+#endif // _N3DMATH2_HPP_