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/*
* ***** 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.
*
* Contributor(s): Brecht Van Lommel.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/render/intern/include/strand.h
* \ingroup render
*/
#ifndef __STRAND_H__
#define __STRAND_H__
struct StrandVert;
struct StrandRen;
struct StrandBuffer;
struct ShadeSample;
struct StrandPart;
struct Render;
struct RenderPart;
struct RenderBuckets;
struct RenderPrimitiveIterator;
struct ZSpan;
struct ObjectInstanceRen;
struct StrandSurface;
struct DerivedMesh;
struct ObjectRen;
typedef struct StrandPoint {
/* position within segment */
float t;
/* camera space */
float co[3];
float nor[3];
float tan[3];
float strandco;
float width;
/* derivatives */
float dtco[3], dsco[3];
float dtstrandco;
/* outer points */
float co1[3], co2[3];
float hoco1[4], hoco2[4];
float zco1[3], zco2[3];
int clip1, clip2;
/* screen space */
float hoco[4];
float x, y;
/* simplification */
float alpha;
} StrandPoint;
typedef struct StrandSegment {
struct StrandVert *v[4];
struct StrandRen *strand;
struct StrandBuffer *buffer;
struct ObjectInstanceRen *obi;
float sqadaptcos;
StrandPoint point1, point2;
int shaded;
} StrandSegment;
struct StrandShadeCache;
typedef struct StrandShadeCache StrandShadeCache;
void strand_eval_point(StrandSegment *sseg, StrandPoint *spoint);
void render_strand_segment(struct Render *re, float winmat[4][4], struct StrandPart *spart, struct ZSpan *zspan, int totzspan, StrandSegment *sseg);
void strand_minmax(struct StrandRen *strand, float min[3], float max[3], const float width);
struct StrandSurface *cache_strand_surface(struct Render *re, struct ObjectRen *obr, struct DerivedMesh *dm, float mat[4][4], int timeoffset);
void free_strand_surface(struct Render *re);
struct StrandShadeCache *strand_shade_cache_create(void);
void strand_shade_cache_free(struct StrandShadeCache *cache);
void strand_shade_segment(struct Render *re, struct StrandShadeCache *cache, struct StrandSegment *sseg, struct ShadeSample *ssamp, float t, float s, int addpassflag);
void strand_shade_unref(struct StrandShadeCache *cache, struct ObjectInstanceRen *obi, struct StrandVert *svert);
#endif
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