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annotate libs/vmath/ray.cc @ 15:2d48f65da357
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| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 07 Jun 2015 20:40:37 +0300 |
| parents | |
| children |
| rev | line source |
|---|---|
| nuclear@10 | 1 /* |
| nuclear@10 | 2 libvmath - a vector math library |
| nuclear@10 | 3 Copyright (C) 2004-2015 John Tsiombikas <nuclear@member.fsf.org> |
| nuclear@10 | 4 |
| nuclear@10 | 5 This program is free software: you can redistribute it and/or modify |
| nuclear@10 | 6 it under the terms of the GNU Lesser General Public License as published |
| nuclear@10 | 7 by the Free Software Foundation, either version 3 of the License, or |
| nuclear@10 | 8 (at your option) any later version. |
| nuclear@10 | 9 |
| nuclear@10 | 10 This program is distributed in the hope that it will be useful, |
| nuclear@10 | 11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| nuclear@10 | 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| nuclear@10 | 13 GNU Lesser General Public License for more details. |
| nuclear@10 | 14 |
| nuclear@10 | 15 You should have received a copy of the GNU Lesser General Public License |
| nuclear@10 | 16 along with this program. If not, see <http://www.gnu.org/licenses/>. |
| nuclear@10 | 17 */ |
| nuclear@10 | 18 #include "ray.h" |
| nuclear@10 | 19 #include "vector.h" |
| nuclear@10 | 20 |
| nuclear@10 | 21 scalar_t Ray::env_ior = 1.0; |
| nuclear@10 | 22 |
| nuclear@10 | 23 Ray::Ray() |
| nuclear@10 | 24 { |
| nuclear@10 | 25 ior = env_ior; |
| nuclear@10 | 26 energy = 1.0; |
| nuclear@10 | 27 time = 0; |
| nuclear@10 | 28 iter = 0; |
| nuclear@10 | 29 } |
| nuclear@10 | 30 |
| nuclear@10 | 31 Ray::Ray(const Vector3 &origin, const Vector3 &dir) |
| nuclear@10 | 32 { |
| nuclear@10 | 33 this->origin = origin; |
| nuclear@10 | 34 this->dir = dir; |
| nuclear@10 | 35 ior = env_ior; |
| nuclear@10 | 36 energy = 1.0; |
| nuclear@10 | 37 time = 0; |
| nuclear@10 | 38 iter = 0; |
| nuclear@10 | 39 } |
| nuclear@10 | 40 |
| nuclear@10 | 41 void Ray::transform(const Matrix4x4 &xform) |
| nuclear@10 | 42 { |
| nuclear@10 | 43 Matrix4x4 upper = xform; |
| nuclear@10 | 44 upper[0][3] = upper[1][3] = upper[2][3] = upper[3][0] = upper[3][1] = upper[3][2] = 0.0; |
| nuclear@10 | 45 upper[3][3] = 1.0; |
| nuclear@10 | 46 |
| nuclear@10 | 47 dir.transform(upper); |
| nuclear@10 | 48 origin.transform(xform); |
| nuclear@10 | 49 } |
| nuclear@10 | 50 |
| nuclear@10 | 51 Ray Ray::transformed(const Matrix4x4 &xform) const |
| nuclear@10 | 52 { |
| nuclear@10 | 53 Ray foo = *this; |
| nuclear@10 | 54 foo.transform(xform); |
| nuclear@10 | 55 return foo; |
| nuclear@10 | 56 } |
| nuclear@10 | 57 |
| nuclear@10 | 58 void Ray::enter(scalar_t new_ior) |
| nuclear@10 | 59 { |
| nuclear@10 | 60 ior = new_ior; |
| nuclear@10 | 61 } |
| nuclear@10 | 62 |
| nuclear@10 | 63 void Ray::leave() |
| nuclear@10 | 64 { |
| nuclear@10 | 65 } |
| nuclear@10 | 66 |
| nuclear@10 | 67 scalar_t Ray::calc_ior(bool entering, scalar_t mat_ior) const |
| nuclear@10 | 68 { |
| nuclear@10 | 69 scalar_t from_ior = this->ior; |
| nuclear@10 | 70 |
| nuclear@10 | 71 if(entering) { |
| nuclear@10 | 72 return from_ior / mat_ior; |
| nuclear@10 | 73 } |
| nuclear@10 | 74 |
| nuclear@10 | 75 Ray tmp = *this; |
| nuclear@10 | 76 tmp.leave(); |
| nuclear@10 | 77 return from_ior / tmp.ior; |
| nuclear@10 | 78 } |