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/**
** sipp - SImple Polygon Processor
**
** A general 3d graphic package
**
** Copyright Equivalent Software HB 1992
**
** 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 1, or 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 can receive a copy of the GNU General Public License from the
** Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
/**
** rendering.h - Types and interface to the rendering.c
**/
#ifndef RENDERING_H
#define RENDERING_H
#include <sipp.h>
#include <geometric.h>
/*
* Modes for storing the image.
*/
#define PBM_FILE 0
#define PPM_FILE 1
#define FUNCTION 2
/*
* Temporary storage of transformed vertices.
*/
typedef struct view_coord_3d {
Vector view; /* Transformed view coordinates */
double hden; /* Homogenous denominator */
Vector world; /* Transformed world voordinates */
Vector normal; /* average normal */
Vector texture; /* texture parameters */
struct view_coord_3d *next; /* next vertex in the list */
} View_coord;
/*
* Entry in the edge list used in rendering.
*/
typedef struct edges_3d {
int ystart;
int ystop;
double xstart;
double xstep;
double hden;
double hdenstep;
Vector world; /* World coordinates */
Vector worldstep; /* World coordinates interpolation steps */
Vector normal; /* Surface normal */
Vector normalstep; /* Surface normal interpolation steps */
Vector texture; /* Texture coordinates */
Vector texturestep; /* Texture coordinates interpolation steps */
int polygon; /* Id of the polygon the edge belongs to */
Surface *surface; /* Surface that the edge belongs to */
struct edges_3d *next; /* Next edge on this scanline */
} Edge;
#ifdef SAVE_MEMORY
typedef struct surf_box_t {
Surface *surface;
Transf_mat mat;
struct surf_box_t *next
} Surface_box;
typedef struct {
Edge *edge;
Surface_box *surf_box;
} Bucket_entry;
#endif
#endif /* RENDERING_H */
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