#include?“stdafx.h“
#include?“CFractalTerrian.h“
#include?
GLfloat	fogColor[4]?=?{.84f?.87f?1.f?1.f};
extern?int?power_of_two（int?n）;
extern?GLuint?load_texture（const?char*?file_name）;

GLuint?CFractalTerrian::texture=0;

CFractalTerrian::CFractalTerrian（int?sizeint?num）
{
	grid=NULL;
????Size=size;
	Num=num;
}


/*參數(shù)含義
??fa:數(shù)組首地址，存儲(chǔ)高度值
??size:網(wǎng)格的大小
??seedValue：隨機(jī)算法所用種子值
??heightScale:
??h：擾動(dòng)值?
??*/
//數(shù)組的真實(shí)大小為Size=Pow（2i）+1正方形個(gè)數(shù)為Pow（22i）i為迭代次數(shù)
//此處的size=Size-1;
void?CFractalTerrian::fill2DFractArray?（float?*fa?int?size
		???????int?seedValue?float?heightScale?float?h）
{
????int	i?j;
????int	stride;
????int	oddline;
????int?subSize;
	float?ratio?scale;
	//只處理維數(shù)為2的整數(shù)次方的數(shù)組
?//???if?（!powerOf2（size）?||?（size==1））?{?return;?}
??????if（!power_of_two（size）?||?（size==1））?return;
????/*?subSize?以縱橫向線段數(shù)計(jì)的數(shù)組維數(shù)
???????segments?以頂點(diǎn)數(shù)計(jì)的數(shù)組維數(shù)
	*/
????subSize?=?size;
????size++;
????
????/*?initialize?random?number?generator?*/
????srand?（seedValue）;
????
	/*?設(shè)定我們的粗糙度常量
	???隨機(jī)數(shù)始終在0.0到1.0范圍內(nèi)生成。
	???隨機(jī)數(shù)將乘上scale，每次迭代后scale將乘上ratio以有效的減少隨機(jī)數(shù)范圍。*/
	ratio?=?（float）?pow?（2.-h）;
	scale?=?heightScale?*?ratio;

????/*?設(shè)置前四個(gè)種子值。如一個(gè)4X4數(shù)組，我們將初始化下邊*代表的點(diǎn)：
???????????*?.?.?.?*
???????????.?.?.?.?.
???????????.?.?.?.?.
???????????.?.?.?.?.
???????????*?.?.?.?*
???????按diamond-square算法的術(shù)語，這將給我們正方形。
???????數(shù)組四角賦相同的值，這使我們排列數(shù)組時(shí)能無縫的拼接起來*/

????stride?=?subSize?/?2;
????fa[（0*size）+0]?=
??????fa[（subSize*size）+0]?=
????????fa[（subSize*size）+subSize]?=
??????????fa[（0*size）+subSize]?=?0.f;
????
????/*現(xiàn)在依據(jù)棱錐種子值遞增加入細(xì)節(jié)。
	根據(jù)stride循環(huán)每次循環(huán)末尾都會(huì)將stride減半，
	直到stride為0時(shí)結(jié)束?*/
????while?（stride）?{
		/*?先用square數(shù)據(jù)生成diamond數(shù)據(jù)。
		???第一遍經(jīng)過4X4矩陣時(shí)，已有數(shù)據(jù)為下邊的X，
		???我們要生成*處的數(shù)據(jù)：
???????????????X?.?.?.?X
???????????????.?.?.?.?.
???????????????.?.?*?.?.
???????????????.?.?.?.?.
???????????????X?.?.?.?X
????????*/
		for?（i=stride;?i			for?（j=stride;?j				fa[（i?*?size）?+?j]?=
					scale?*?randnum?（-.5f.5f）?+
					avgSquareVals?（i?j?stride?size?fa）;
				j?+=?stride;
			}
			i?+=?stride;
		}

		/*?先用diamond數(shù)據(jù)生成square數(shù)據(jù)。
		???第一遍經(jīng)過這段代碼時(shí)，已有數(shù)據(jù)為下邊的X，
		???我們要生成*處的數(shù)據(jù)：
???????????????X?.?*?.?X
???????????????.?.?.?.?.
???????????????*?.?X?.?*
???????????????.?.?.?.?.
???????????????X?.?*?.?X
	???????ij代表我們在數(shù)組中的（xy）位置。我們想生成的第一個(gè)值位于（i=2j=0），
		???用“oddline“及“stride“來增加j到所需值。
	????*/
		oddline?=?0;
		for?（i=0;?i		????oddline?=?（oddline?==?0）;
			for?（j=0;?j				if?（（oddline）?&&?!j）?j+=stride;

				/*?i?and?j?are?setup.?Call?avgDiamondVals?with?the
				???current?position.?It?will?return?the?average?of?the
				???surrounding?diamond?data?points.?*/
				fa[（i?*?size）?+?j]?=
					scale?*?randnum?（-.5f.5f）?+
					avgDiamondVals?（i?j?stride?size?subSize?fa）;

				/*?To?wrap?edges?seamlessly?copy?edge?values?around
				???to?other?side?of?array?*/
				if?（i==0）
					fa[（subSize*size）?+?j]

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????8215??2008-02-14?15:41??IFS分形樹\CFractalTerrian.cpp

?????文件???????1041??2008-02-14?15:34??IFS分形樹\CFractalTerrian.h

?????文件???????1089??2008-02-20?13:21??IFS分形樹\CSky.cpp

????.CA....???????174??2008-02-20?13:22??IFS分形樹\CSky.h

?????文件??????12271??2008-02-14?15:15??IFS分形樹\CTree.cpp

?????文件????????754??2008-02-20?13:22??IFS分形樹\CTree.h

?????文件??????49206??2003-02-13?23:49??IFS分形樹\data\bark.BMP

?????文件?????196664??2006-07-18?04:43??IFS分形樹\data\leaf.bmp

?????文件?????786486??2002-12-24?11:58??IFS分形樹\data\sky.bmp

?????文件????3145782??2008-02-23?13:43??IFS分形樹\data\terrian.bmp

????..A.SH.?????71168??2008-02-23?13:57??IFS分形樹\data\Thumbs.db

?????文件???????2584??2008-02-23?13:55??IFS分形樹\MainFrm.cpp

?????文件???????1583??2007-12-16?16:42??IFS分形樹\MainFrm.h

?????文件???????4385??2007-12-16?14:11??IFS分形樹\ReadMe.txt

?????文件????????766??2008-02-23?13:51??IFS分形樹\res\icon1.ico

????..A.SH.??????8192??2008-02-23?13:57??IFS分形樹\res\Thumbs.db

?????文件???????1078??2007-12-16?14:11??IFS分形樹\res\Toolbar.bmp

?????文件???????1078??2007-12-16?14:11??IFS分形樹\res\三維分形模擬.ico

????.CA....???????404??2007-12-16?14:11??IFS分形樹\res\三維分形模擬.rc2

?????文件???????1078??2007-12-16?14:11??IFS分形樹\res\三維分形模擬Doc.ico

?????文件????????738??2008-02-23?13:52??IFS分形樹\resource.h

????.CA....???????214??2008-01-28?22:15??IFS分形樹\StdAfx.cpp

?????文件???????1118??2007-12-21?16:53??IFS分形樹\StdAfx.h

?????文件??????43532??2008-02-23?13:52??IFS分形樹\三維分形模擬.aps

?????文件???????2078??2008-02-23?14:46??IFS分形樹\三維分形模擬.clw

?????文件???????4186??2007-12-21?16:56??IFS分形樹\三維分形模擬.cpp

?????文件???????5209??2008-02-23?13:51??IFS分形樹\三維分形模擬.dsp

????.CA....???????549??2007-12-16?14:11??IFS分形樹\三維分形模擬.dsw

?????文件?????139342??2008-02-23?14:33??IFS分形樹\三維分形模擬.exe

?????文件???????1336??2007-12-16?14:11??IFS分形樹\三維分形模擬.h

............此處省略14個(gè)文件信息