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Diffstat (limited to 'source/blender/render/intern/include/rayintersection.h')
| -rw-r--r-- | source/blender/render/intern/include/rayintersection.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/source/blender/render/intern/include/rayintersection.h b/source/blender/render/intern/include/rayintersection.h new file mode 100644 index 00000000000..a303301ad3b --- /dev/null +++ b/source/blender/render/intern/include/rayintersection.h @@ -0,0 +1,136 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2007 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): André Pinto. + * + * ***** END GPL LICENSE BLOCK ***** + * RE_raytrace.h: ray tracing api, can be used independently from the renderer. + */ + +/** \file blender/render/intern/include/rayintersection.h + * \ingroup render + */ + + +#ifndef __RAYINTERSECTION_H__ +#define __RAYINTERSECTION_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "BLI_math_geom.h" + +struct RayObject; + +/* Ray Hints */ + +#define RE_RAY_LCTS_MAX_SIZE 256 +#define RT_USE_LAST_HIT /* last shadow hit is reused before raycasting on whole tree */ +//#define RT_USE_HINT /* last hit object is reused before raycasting on whole tree */ + +typedef struct LCTSHint { + int size; + struct RayObject *stack[RE_RAY_LCTS_MAX_SIZE]; +} LCTSHint; + +typedef struct RayHint { + union { LCTSHint lcts; } data; +} RayHint; + +/* Ray Intersection */ + +typedef struct Isect { + /* ray start, direction (normalized vector), and max distance. on hit, + * the distance is modified to be the distance to the hit point. */ + float start[3]; + float dir[3]; + float dist; + + /* for envmap and incremental view update renders */ + float origstart[3]; + float origdir[3]; + + /* precomputed values to accelerate bounding box intersection */ + int bv_index[6]; + float idot_axis[3]; + + /* intersection options */ + int mode; /* RE_RAY_SHADOW, RE_RAY_MIRROR, RE_RAY_SHADOW_TRA */ + int lay; /* -1 default, set for layer lamps */ + int skip; /* skip flags */ + int check; /* check flags */ + void *userdata; /* used by bake check */ + + /* hit information */ + float u, v; + int isect; /* which half of quad */ + + struct { + void *ob; + void *face; + } hit, orig; + + /* last hit optimization */ + struct RayObject *last_hit; + + /* hints */ +#ifdef RT_USE_HINT + RayTraceHint *hint, *hit_hint; +#endif + RayHint *hint; + + /* ray counter */ +#ifdef RE_RAYCOUNTER + RayCounter *raycounter; +#endif + + /* Precalculated coefficients for watertight intersection check. */ + struct IsectRayPrecalc isect_precalc; +} Isect; + +/* ray types */ +#define RE_RAY_SHADOW 0 +#define RE_RAY_MIRROR 1 +#define RE_RAY_SHADOW_TRA 2 + +/* skip options */ +#define RE_SKIP_CULLFACE (1 << 0) +/* if using this flag then *face should be a pointer to a VlakRen */ +#define RE_SKIP_VLR_NEIGHBOUR (1 << 1) + +/* check options */ +#define RE_CHECK_VLR_NONE 0 +#define RE_CHECK_VLR_RENDER 1 +#define RE_CHECK_VLR_NON_SOLID_MATERIAL 2 +#define RE_CHECK_VLR_BAKE 3 + +/* arbitrary, but can't use e.g. FLT_MAX because of precision issues */ +#define RE_RAYTRACE_MAXDIST 1e15f +#define RE_RAYTRACE_EPSILON 0.0f + +#ifdef __cplusplus +} +#endif + +#endif /* __RAYINTERSECTION_H__ */ + |