#define?WIN32_LEAN_AND_MEAN		//?trim?the?excess?fat?from?Windows


/*******************************************************************
*	Program:?Chapter?8?Texture?Example?2:?The?Waving?Flag?Example
*	OpenGL?Game?Programming
*	Author:?Kevin?Hawkins
*	Description:?Displays?a?“waving“?American?flag.?The?flag?waves
*				based?on?the?sin（）?function.
********************************************************************/

//////?Defines
#define?BITMAP_ID?0x4D42		//?the?universal?bitmap?ID

//////?Includes
#include?			//?standard?Windows?app?include
#include?
#include?
#include?
#include?				//?standard?OpenGL?include
#include?				//?OpenGL?utilties

//////?Global?Variables
HDC?g_HDC;						//?global?device?context
bool?fullScreen?=?false;		//?true?=?fullscreen;?false?=?windowed
bool?keyPressed[256];			//?holds?true?for?keys?that?are?pressed	

//////?Texture?Information
BITMAPINFOHEADER	bitmapInfoHeader;	//?bitmap?info?header
unsigned?char*		bitmapData;			//?the?texture?data
unsigned?int		texture;			//?the?texture?object

//////?Flag?Data
float?flagPoints[36][20][3];			//?flag?is?36x20?（in?points）
float?wrapValue;						//?used?to?wrap?point?data

//?InitializeFlag（）
//?desc:?initializes?the?waving?texture?mapped?flag‘s?data?by?calculating
//???????a?sin?wave?across?the?flag.
void?InitializeFlag（）
{
	int?xIdx;						//?counter?index?for?x-plane
	int?yIdx;						//?counter?index?for?y-plane

	//?loop?through?all?of?the?flag?points?and?calculate?the?sin?wave
	//?for?the?z-coordinate.?x-?and?y-?coordinates?equal?to?counter?indices
	for?（xIdx?=?0;?xIdx?	{
		for?（yIdx?=?0;?yIdx?		{
			flagPoints[xIdx][yIdx][0]?=?（float）xIdx;
			flagPoints[xIdx][yIdx][1]?=?（float）yIdx;
			flagPoints[xIdx][yIdx][2]?=?float（sin（（（（float）xIdx*20.0f）/360.0f）*3.14159f*2.0f））;?
		}
	}
}

//?DrawFlag（）
//?desc:?draws?the?waving?texture?mapped?flag
void?DrawFlag（）
{
	int?xIdx;						//?counter?index?for?x-direction
	int?yIdx;						//?counter?index?for?y-direction
	float?texLeft;					//?left?texture?coordinate?for?quads
	float?texBottom;				//?bottom?texture?coordinate?for?quads
	float?texTop;					//?top?texture?coordinate?for?quads
	float?texRight;					//?right?texture?coordinate?for?quads

	glPushMatrix（）;
		glBindTexture（GL_TEXTURE_2D?texture）;			//?bind?our?texture
		glBegin（GL_QUADS）;								//?draw?flag?using?quads

		//?loop?through?the?flag‘s?points?minus?the?last?2?in?each?direction
		//?since?we?only?use?them?to?draw?the?last?GL_QUAD?in?each?direction
		for?（xIdx?=?0;?xIdx?		{
			for?（yIdx?=?0;?yIdx?			{
				//?calculate?texture?coordinates?for?current?quad
				texLeft?=?float（xIdx）?/?35.0f;			//?left?texture?coordinate
				texBottom?=?float（yIdx）?/?18.0f;		//?bottom?texture?coordinate
				texRight?=?float（xIdx+1）?/?35.0f;		//?right?texture?coordinate

?屬性????????????大小?????日期????時間???名稱
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?????文件??????15000??2001-03-08?02:47??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\main.cpp

?????文件???????4072??2001-01-04?20:23??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\textureex2.dsp

?????文件????????543??2001-01-01?23:41??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\textureex2.dsw

?????文件??????36864??2001-04-10?02:15??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\textureex2.exe

?????文件??????24630??2001-01-02?01:03??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\usflag.bmp

?????文件????3443712??2009-06-16?11:09??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\textureex2.ncb

?????文件???????3072??2009-06-16?11:09??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））\textureex2.suo

?????目錄??????????0??2009-06-19?10:16??飄動的美國旗幟（openGL游戲程序設計（美國K.霍金））

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??????????????3527893????????????????????8