1 /******************************************************************************* 2 * super.h 3 * 4 * This module contains all defines, typedefs, and prototypes for SUPEREL.CPP. 5 * 6 * --------------------------------------------------------------------------- 7 * Persistence of Vision Ray Tracer ('POV-Ray') version 3.7. 8 * Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd. 9 * 10 * POV-Ray is free software: you can redistribute it and/or modify 11 * it under the terms of the GNU Affero General Public License as 12 * published by the Free Software Foundation, either version 3 of the 13 * License, or (at your option) any later version. 14 * 15 * POV-Ray is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Affero General Public License for more details. 19 * 20 * You should have received a copy of the GNU Affero General Public License 21 * along with this program. If not, see <http://www.gnu.org/licenses/>. 22 * --------------------------------------------------------------------------- 23 * POV-Ray is based on the popular DKB raytracer version 2.12. 24 * DKBTrace was originally written by David K. Buck. 25 * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins. 26 * --------------------------------------------------------------------------- 27 * $File: //depot/public/povray/3.x/source/backend/shape/super.h $ 28 * $Revision: #1 $ 29 * $Change: 6069 $ 30 * $DateTime: 2013/11/06 11:59:40 $ 31 * $Author: chrisc $ 32 *******************************************************************************/ 33 34 #ifndef SUPER_H 35 #define SUPER_H 36 37 namespace pov 38 { 39 40 /***************************************************************************** 41 * Global preprocessor definitions 42 ******************************************************************************/ 43 44 #define SUPERELLIPSOID_OBJECT (BASIC_OBJECT) 45 46 47 48 /***************************************************************************** 49 * Global typedefs 50 ******************************************************************************/ 51 52 class Superellipsoid : public ObjectBase 53 { 54 public: 55 VECTOR Power; 56 57 Superellipsoid(); 58 virtual ~Superellipsoid(); 59 60 virtual ObjectPtr Copy(); 61 62 virtual bool All_Intersections(const Ray&, IStack&, TraceThreadData *); 63 virtual bool Inside(const VECTOR, TraceThreadData *) const; 64 virtual void Normal(VECTOR, Intersection *, TraceThreadData *) const; 65 virtual void Translate(const VECTOR, const TRANSFORM *); 66 virtual void Rotate(const VECTOR, const TRANSFORM *); 67 virtual void Scale(const VECTOR, const TRANSFORM *); 68 virtual void Transform(const TRANSFORM *); 69 virtual void Invert(); 70 virtual void Compute_BBox(); 71 protected: 72 bool Intersect(const Ray& ray, IStack& Depth_Stack, TraceThreadData *Thread); 73 static bool intersect_box(const VECTOR P, const VECTOR D, DBL *dmin, DBL *dmax); 74 static DBL power(DBL x, DBL e); 75 static DBL evaluate_g(DBL x, DBL y, DBL e); 76 DBL evaluate_superellipsoid(const VECTOR P) const; 77 static int compdists(const void *in_a, const void *in_b); 78 int find_ray_plane_points(const VECTOR P, const VECTOR D, int cnt, DBL *dists, DBL mindist, DBL maxdist) const; 79 void solve_hit1(DBL v0, const VECTOR tP0, DBL v1, const VECTOR tP1, VECTOR P) const; 80 bool check_hit2(const VECTOR P, const VECTOR D, DBL t0, VECTOR P0, DBL v0, DBL t1, DBL *t, VECTOR Q) const; 81 bool insert_hit(const Ray& ray, DBL Depth, IStack& Depth_Stack, TraceThreadData *Thread); 82 }; 83 84 } 85 86 #endif 87