Cyd
2b8ca921cb
Complete disaster-recovery snapshot: engine/game source, game data assets, VC6 toolchain + DX SDKs, build outputs, deployed game, and _UNUSED archive. Large binaries in Git LFS; text preserved byte-for-byte (core.autocrlf=false, no eol attributes). See RECOVERY.md for the one-clone rebuild procedure.
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/**********************************************************************
|
|
*<
|
|
FILE: gutil.h
|
|
|
|
DESCRIPTION: Geometric utility functions
|
|
|
|
CREATED BY: Dan Silva
|
|
|
|
HISTORY:
|
|
|
|
*> Copyright (c) 1994, All Rights Reserved.
|
|
**********************************************************************/
|
|
|
|
#ifndef _GUTIL_H
|
|
|
|
#define _GUTIL_H
|
|
|
|
|
|
//- BaryCoords-----------------------------------------------------
|
|
// Given three points in space forming a triangle (p0,p1,p2),
|
|
// and a fourth point in the plane of that triangle, returns the
|
|
// barycentric coords of that point relative to the triangle.
|
|
|
|
DllExport Point3 BaryCoords(Point3 p0, Point3 p1, Point3 p2, Point3 p);
|
|
|
|
// Same thing in 2D
|
|
DllExport Point3 BaryCoords(Point2 p0, Point2 p1, Point2 p2, Point2 p);
|
|
|
|
|
|
|
|
//--RayHitsBox--------------------------------------------------------
|
|
// Returns true of the ray pierces the box
|
|
|
|
DllExport BOOL RayHitsBox(Ray &ray, Box3 &b);
|
|
|
|
|
|
// DistPtToLine ---------------------------------------------------------
|
|
// find distance of q from line p0->p1
|
|
|
|
DllExport float DistPtToLine(Point2 *p0, Point2 *p1, Point2 *q );
|
|
|
|
|
|
// Dist3DPtToLine ---------------------------------------------------------
|
|
// find distance of q from line p0->p1
|
|
|
|
DllExport float Dist3DPtToLine(Point3* p0, Point3* p1, Point3* q );
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Computing the 3 Bump basis vectors from the UVW's at the triangle.
|
|
//
|
|
// input:
|
|
// tv: texture coordinates at 3 triangle vertices
|
|
// v: coordinates of triangle vertices (usually in camera space)
|
|
//
|
|
// output:
|
|
// bvec: the 3 bump basis vectors (normalized) corresponding to the U,V,and W axes.
|
|
//
|
|
DllExport void ComputeBumpVectors(const Point3 tv[3], const Point3 v[3], Point3 bvec[3]);
|
|
|
|
|
|
|
|
//-------------------------------------------------------------------------------
|
|
// Quick and dirty unit vector compression. Only accurate to 1 part in 512
|
|
//
|
|
ULONG DllExport CompressNormal(Point3 p);
|
|
|
|
Point3 DllExport DeCompressNormal(ULONG n);
|
|
|
|
|
|
#endif |