// GLTools.h// OpenGL SuperBible// Copyright 1998 - 2003 Richard S. Wright Jr..// Code by Richard S. Wright Jr.// All Macros prefixed with GLT_, all functions prefixed with glt... This// should avoid most namespace problems// Some of these functions allocate memory. Use CRT functions to free// Report bugs to rwright@starstonesoftware.com#ifndef __GLTOOLS__LIBRARY#define __GLTOOLS__LIBRARY// Windows#ifdef WIN32#include <windows.h>#include <winnt.h>#include <gl\gl.h>#include <gl\glu.h>#endif// Mac OS X#ifdef __APPLE__#include <Carbon/Carbon.h>#include <OpenGL/gl.h>#include <OpenGL/glu.h>#include <OpenGL/glext.h>#include <sys/time.h>#endif// Universal includes#include <math.h>///////////////////////////////////////////////////////// Useful constants#define GLT_PI	3.14159265358979323846#define GLT_PI_DIV_180 0.017453292519943296#define GLT_INV_PI_DIV_180 57.2957795130823229///////////////////////////////////////////////////////////////////////////////// Useful shortcuts and macros// Radians are king... but we need a way to swap back and forth#define gltDegToRad(x)	((x)*GLT_PI_DIV_180)#define gltRadToDeg(x)	((x)*GLT_INV_PI_DIV_180)///////////////////////////////////////////////////////// Some data typestypedef GLfloat GLTVector2[2];      // Two component floating point vectortypedef GLfloat GLTVector3[3];      // Three component floating point vectortypedef GLfloat GLTVector4[4];      // Four component floating point vectortypedef GLfloat GLTMatrix[16];      // A column major 4x4 matrix of type GLfloat    ///////////////////////////////////////////////////////// Macros for big/little endian happiness#define BYTE_SWAP(x)    x = ((x) >> 8) + ((x) << 8)/////////////////////////////////////////////////////////////////////////////////         THE LIBRARY....///////////////////////////////////////////////////////////////////////////////// vector functions in VectorMath.c void gltAddVectors(const GLTVector3 vFirst, const GLTVector3 vSecond, GLTVector3 vResult);void gltSubtractVectors(const GLTVector3 vFirst, const GLTVector3 vSecond, GLTVector3 vResult);void gltScaleVector(GLTVector3 vVector, const GLfloat fScale);GLfloat gltGetVectorLengthSqrd(const GLTVector3 vVector);GLfloat gltGetVectorLength(const GLTVector3 vVector);void gltNormalizeVector(GLTVector3 vNormal);void gltGetNormalVector(const GLTVector3 vP1, const GLTVector3 vP2, const GLTVector3 vP3, GLTVector3 vNormal);void gltCopyVector(const GLTVector3 vSource, GLTVector3 vDest);GLfloat gltVectorDotProduct(const GLTVector3 u, const GLTVector3 v);void gltVectorCrossProduct(const GLTVector3 vU, const GLTVector3 vV, GLTVector3 vResult);void gltTransformPoint(const GLTVector3 vSrcPoint, const GLTMatrix mMatrix, GLTVector3 vPointOut);void gltRotateVector(const GLTVector3 vSrcVector, const GLTMatrix mMatrix, GLTVector3 vPointOut);void gltGetPlaneEquation(GLTVector3 vPoint1, GLTVector3 vPoint2, GLTVector3 vPoint3, GLTVector3 vPlane);GLfloat gltDistanceToPlane(GLTVector3 vPoint, GLTVector4 vPlane);//////////////////////////////////////////// Other matrix functions in matrixmath.cvoid gltLoadIdentityMatrix(GLTMatrix m);void gltMultiplyMatrix(const GLTMatrix m1, const GLTMatrix m2, GLTMatrix mProduct );void gltRotationMatrix(float angle, float x, float y, float z, GLTMatrix mMatrix);void gltTranslationMatrix(GLfloat x, GLfloat y, GLfloat z, GLTMatrix mTranslate);void gltScalingMatrix(GLfloat x, GLfloat y, GLfloat z, GLTMatrix mScale);void gltMakeShadowMatrix(GLTVector3 vPoints[3], GLTVector4 vLightPos, GLTMatrix destMat);void gltTransposeMatrix(GLTMatrix mTranspose);void gltInvertMatrix(const GLTMatrix m, GLTMatrix mInverse);#endif