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EnigmA AMIGA RUN 35 (1999)(G.R. Edizioni)(IT)[!][issue 1999-03].iso
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ff_scan.h
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C/C++ Source or Header
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1997-07-12
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3KB
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102 lines
////////////////////////////////////////////////////////////
//
// FF_SCAN.H - Form Factor Scan Conversion Class
//
// Version: 1.03A
//
// History: 94/08/23 - Version 1.00A release.
// 94/12/16 - Version 1.01A release.
// 95/02/05 - Version 1.02A release.
// 95/07/21 - Version 1.02B release.
// 96/02/14 - Version 1.02C release.
// 96/04/01 - Version 1.03A release.
//
// Compilers: Microsoft Visual C/C++ Professional V1.5
// Borland C++ Version 4.5
//
// Author: Ian Ashdown, P.Eng.
// byHeart Software Limited
// 620 Ballantree Road
// West Vancouver, B.C.
// Canada V7S 1W3
// Tel. (604) 922-6148
// Fax. (604) 987-7621
//
// Copyright 1994-1996 byHeart Software Limited
//
// The following source code has been derived from:
//
// Ashdown, I. 1994. Radiosity: A Programmer's
// Perspective. New York, NY: John Wiley & Sons.
//
// It may be freely copied, redistributed, and/or modified
// for personal use ONLY, as long as the copyright notice
// is included with all source code files.
//
////////////////////////////////////////////////////////////
#ifndef _FF_SCAN_H
#define _FF_SCAN_H
#include "ff_scan.h"
#include "ff_poly.h"
static const float FF_Infinity = MAX_VALUE;
static const WORD FF_None = 0;
struct FormCellInfo // Face cell information
{
float depth; // Polygon cell depth
WORD id; // Polygon identifier
};
struct FormVertexInfo // Vertex information
{
struct // Face cell array offsets
{
int x; // Width offset
int y; // Height offset
}
face;
Point3 posn; // Scaled position
};
struct FormScanInfo // Scan line intersection info
{
double x; // X-axis co-ordinate
double z; // Pseudodepth
};
struct FormEdgeInfo // Edge information
{
BOOL first; // First intersection flag
FormScanInfo isect[2]; // Scan line intersection array
};
// Form factor polygon scan conversion (abstract class)
class FormScan
{
protected:
BOOL status; // Object status
int ymin; // Minimum y-axis co-ord
int ymax; // Maximum y-axis co-ord
int num_vert; // Number of vertices
FormCellInfo **cell_buffer; // Cell info buffer ptr
FormEdgeInfo *edge_list; // Edge list pointer
FormVertexInfo v_info[8]; // Vertex info table
WORD poly_id; // Polygon identifier
virtual void DrawEdgeList() = 0;
void GetVertexInfo( FormPoly & );
void ScanEdges();
public:
virtual ~FormScan() { };
BOOL GetStatus() { return status; }
void Scan( FormPoly & );
};
#endif