sdis_camera.h (1718B)
1 /* Copyright (C) 2016-2025 |Méso|Star> (contact@meso-star.com) 2 * 3 * This program is free software: you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation, either version 3 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 #ifndef SDIS_CAMERA_H 17 #define SDIS_CAMERA_H 18 19 #include <rsys/double3.h> 20 #include <rsys/ref_count.h> 21 22 struct sdis_device; 23 24 struct sdis_camera { 25 /* Orthogonal camera frame */ 26 double axis_x[3]; 27 double axis_y[3]; 28 double axis_z[3]; 29 30 double position[3]; 31 double fov_x; /* Field of view in radians */ 32 double rcp_proj_ratio; /* height / width */ 33 34 ref_T ref; 35 struct sdis_device* dev; 36 }; 37 38 static FINLINE void 39 camera_ray 40 (const struct sdis_camera* cam, 41 const double sample[2], /* In [0, 1[ */ 42 double org[3], 43 double dir[3]) 44 { 45 double x[3], y[3], len; 46 (void)len; /* Avoid warning in debug */ 47 ASSERT(cam && sample && org && dir); 48 ASSERT(sample[0] >= 0.0 || sample[0] < 1.0); 49 ASSERT(sample[1] >= 0.0 || sample[1] < 1.0); 50 51 d3_muld(x, cam->axis_x, sample[0]*2.0 - 1.0); 52 d3_muld(y, cam->axis_y, sample[1]*2.0 - 1.0); 53 d3_add(dir, d3_add(dir, x, y), cam->axis_z); 54 len = d3_normalize(dir, dir); 55 ASSERT(len >= 1.e-6); 56 d3_set(org, cam->position); 57 } 58 59 #endif /* SDIS_CAMERA_H */ 60