計算機圖形學試驗報告

1、實驗成績：計算機圖形學實驗報告6班級：1420551專業(yè)：網(wǎng)絡工程學號：姓名：計算機圖形學課程實驗報告（六）班 級1420551實驗日期2016.12.08姓 名學號實 驗 名 稱球面光源與材質交互作用算法實驗目的及要求.材質模型.光源模型.光照模型算 法 及 實 驗 步 驟.讀入球面的頂點表和面表。.循環(huán)訪問三角形面片和四邊形面片的每個頂點，調用光照函數(shù)計算所獲 得的光強。.使用雙緩沖技術繪制球面小面片的二維透視投影圖。.使用有效邊表填充算法填充三角形面片和四邊形面片。.使用深度緩沖算法對球面進行動態(tài)消隱。.使用定時器改變球面的轉角生成旋轉動回。調 試 過 程 及 實 驗 結過程：.初始化左

2、窗格控件.左窗格控件響應函數(shù).設計光源類.設計材質類.設計光照類.右窗格內更新視圖 結果：2果ime I總結（核心源程序清單）1.初始化左窗格控件 void CLeftPortion:OnInitialUpdate() (CFormView二OnInitialUpdate();/ TODO: Add your specialized code here and/or call the base class/設置左窗格控件的初始狀態(tài)CheckRadioButton(IDC_GOLD,IDC_BERYL,IDC_RUBY);CheckRadioButton(IDC_LEFTTOP,IDC_RIGH

3、TDOWN,IDC_RIGHTTO P);m_Ambient=TRUE;m_Diffuse=TRUE;m_Specular=TRUE;UpdateData(FALSE);2.左窗格控件響應函數(shù)：void CLeftPortion:OnAmbient()/ 環(huán)境光(/ TODO: Add your control notification handler code hereCTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,1); void CLeftPortion:OnDiffuse()/ 漫反

4、射光(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,2); void CLeftPortion二OnSpecular()鏡面反射光(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllView

5、s(NULL,3);void CLeftPortion:OnGold()/ “金”材質(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,4);void CLeftPortion:OnSilver()/ “銀”材質 (/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CF

6、ormView:GetDocument(); pDoc-UpdateAllViews(NULL,5);void CLeftPortion二OnRuby() “紅寶石”材質(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,6);void CLeftPortion二OnBeryl()/ “綠寶石”材質(/ TODO: Add your control notification hand

7、ler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,7);void CLeftPortion:OnLefttop()/ 光源位于“左上”(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,8);void CLeftPortion二OnLeftdown() 光

8、源位于“左下”(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-UpdateAllViews(NULL,9);void CLeftPortion:OnRighttop()/ 光源位于“右上”(/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument(); pDoc-Upda

9、teAllViews(NULL,10);void CLeftPortion二OnRightdown() 光源位于“右下”/ TODO: Add your control notification handler code here CTestDoc *pDoc=(CTestDoc*)CFormView:GetDocument();pDoc-UpdateAllViews(NULL,11);.設計光源類：class CLightpublic:CLight();virtual CLight();void SetDiffuse(CRGB);設置光源的漫反射光void SetSpecular(CRGB)

10、;/殳置光源的鏡面反射光void SetPosition(double,double,double);/設置光源的直角坐標位置void SetGlobal(double,double,double);/S 置光源的球坐標位置void SetCoef(double,double,double);/段置光強的衰減系數(shù)void SetOnOff(BOOL);設置光源開關狀態(tài)void GlobalToXYZ();/球坐標轉換為直角坐標public:CRGB L_Diffuse;光的漫反射顏色CRGB L_Specular;/光的鏡面高光顏色CP3 L_Position;/光源的位置double L_R

11、,L_Phi,L_Theta;/光源球坐標double L_C0;/常數(shù)衰減系數(shù)double L_C1;/線性衰減系數(shù)double L_C2;/二次衰減系數(shù)BOOL L_OnOff;/ 光源開關BOOL b_Specular;BOOL b_Diffuse;BOOL b_Ambient;一CLight:CLight()L_Diffuse=CRGB(0.0,0.0,0.0);光源的漫反射顏色L_Specular=CRGB(1.0,1.0,1.0);/光源鏡面高光顏色L_Position.x=0.0,L_Position.y=0.0,L_Position.z=1000;/光源位置直角坐標L_R=10

12、00,L_Phi=0,L_Theta=0;/光源位置球坐標L_C0=1.0;/常數(shù)衰減系數(shù)L_C1=0.0;/線性衰減系數(shù)L_C2=0.0;/二次衰減系數(shù)L_OnOff=TRUE;/ 光源開啟b_Specular=TRUE;b_Diffuse=TRUE;bAmbient=TRUE;)CLight:-CLight()()void CLight:SetDiffuse(CRGB dif)(L_Diffuse=dif;)void CLight:SetSpecular(CRGB spe)(L_Specular=spe;)void CLight:SetPosition(double x,double y,

13、double z)(L_Position.x=x;L_Position.y=y;L_Position.z=z;).void CLight:SetGlobal(double r,double phi,double theta) (L_R=r;L_Phi=phi;L_Theta=theta;).void CLight:SetOnOff(BOOL onoff)(L_OnOff=onoff;).void CLight:SetCoef(double c0,double c1,double c2)(L_C0=c0;L_C1=c1;L_C2=c2;)void CLight:GlobalToXYZ()L_Po

14、sition.x=L_R*sin(L_Phi*PI/180)*cos(L_Theta*PI/180);L_Pos用on.y=L_R*sin(L_Phi*PI/180)*sin(L_Theta*PI/180);L_Position.z=L_R*cos(L_Phi*PI/180);.設計材質類： class CMaterialpublic:CMaterial();virtual CMaterial();void SetAmbient(CRGB);/設置材質對環(huán)境光的反射率void SetDiffuse(CRGB);/設置材質對漫反射光的反射率void SetSpecular(CRGB);/股置材質

15、對鏡面反射光的反射率void SetEmit(CRGB);/設置材質自身輻射的顏色void SetExp(double);/設置材質的高光指數(shù)public:CRGB M_Ambient;/材質對環(huán)境光的反射率CRGB M_Diffuse;材質對漫反射光的反射率CRGB M_Specular;/M質對鏡面反射光的反射率CRGB M_Emit;材質自身輻射的顏色 double M_n;/材質的高光指數(shù);CMaterial:CMaterial()M_Ambient=CRGB(0.2,0.2,0.2);材質對環(huán)境光的反射率M_Diffuse=CRGB(0.8,0.8,0.8);/材質對漫反射光的反射率

16、M_Specular=CRGB(0.0,0.0,0.0);/材質對鏡面反射光的反射率M_Emit=CRGB(0.0,0.0,0.0);/材質自身發(fā)散的顏色M_n=1.0;/高光指數(shù)CMaterial:CMaterial() void CMaterial:SetAmbient(CRGB c)M_Ambient=c;.void CMaterial:SetDiffuse(CRGB c)M_Diffuse=c;).void CMaterial:SetSpecular(CRGB c)(M_Specular=c;).void CMaterial:SetEmit(CRGB emi)(M_Emit=emi;)

17、.void CMaterial:SetExp(double n)(M_n=n;).設計光照類：class CLighting (public:CLighting();CLighting(int);virtual CLighting();void SetLightNumber(int);/ 設置光源數(shù)量CRGB Lighting(CP3,CP3,CVector,CMaterial *); 計算光照 public:int LightNum;/ 光源數(shù)量CLight *Light;/ 光源數(shù)組CRGB Ambient;/環(huán)境光);CLighting:CLighting()(LightNum=1;Li

18、ght=new CLightLightNum;Ambient=CRGB(1.0,1.0,1.0);環(huán)境光恒定不變)CLighting:CLighting()(if(Light)(delete 口Light;Light=NULL;) void CLighting:SetLightNumber(int Inum) (if(Light)delete Light;LightNum=lnum;Light=new CLightlnum;)CLighting:CLighting(int lnum)(LightNum=lnum;Light=new CLightlnum;Ambient=CRGB(0.3,030

19、.3);)CRGB CLighting:Lighting(CP3 ViewPoint,CP3 Point,CVectorNormal,CMaterial *pMaterial) (CRGB LastC=pMaterial-M_Emit;材質自身發(fā)散色為初始值for(int i=0;iM_Diffuse.red*CosTheta;InitC.green+=Lighti.L_Diffuse.green*pMaterial-M_Diffuse.green*Cos Theta;InitC.blue+=Lighti.L Diffuse.blue*pMaterial-M Diffuse.blue*CosT

20、het10 a；)/第2步，加入鏡面反射光 if(Lighti.b_Specular) (.CVector VV(Point,ViewPoint);/VV 為視矢量 VV=VV .Normalize。;“單位化視矢量CVector VH=(VL+VV)/(VL+VV).Mag();/ 平分矢量 double nHN=pow(MAX(Dot(VH,VN),0),pMaterial-M_n);InitC.red+=Lighti.L_Specular.red*pMaterial-M_Specular.red*nHN;InitC.green+=Lighti.L_Specular.green*pMate

21、rial-M_Specular.green*n HN;InitC.blue+=Lighti.L_Specular.blue*pMaterial-M_Specular.blue*nHN;)/第3步，光強衰減double c0=Lighti.L_C0;/c0 為常數(shù)衰減因子double c1=Lighti.L_C1;/c1 線性衰減因子 double c2=Lighti.L_C2;/c2 二次衰減因子double f=(1.0/(c0+c1*d+c2*d*d);/ 光強衰減函數(shù) f=MIN(1.0,f);LastC+=InitC*f;) else ( LastC+=Point.c;/物體自身顏色)

22、/第4步，加入環(huán)境光 if(Light0.b_Ambient) (.LastC+=Ambient*pMaterial-M_Ambient;)第5步，顏色歸一化到0,1區(qū)間 LastC.Normalize();/第6步，返回所計算頂點的光強顏色 return LastC;).右窗格內更新視圖：void CTestView:OnUpdate(CView* pSender, LPARAM lHint, CObject*11 pHint) (/ TODO: Add your specialized code here and/or call the base class switch(lHint)(c

23、ase 1:/環(huán)境光pLight-Light0.b_Ambient=!pLight-Light0.b_Ambient;break;case 2:/漫反射光pLight-Light0.b_Diffuse=!pLight-Light0.b_Diffuse;break;case 3:/旗面反射光pLight-Light0.b_Specular=!pLight-Light0.b_Specular; break;case 4:/宸pMaterial-SetAmbient(CRGB(0.247,0.2,0.075); 材質對環(huán)境光的 反射率pMaterial-SetDiffuse(CRGB(0C52,0.

24、606,0.226);/材質對環(huán)境光和 漫反射光的反射率相等pMaterial-SetSpecular(CRGB(1.0,1.0,1.0);/M質對鏡面反射光的 反射率pMaterial-SetEmit(CRGB(0.2,0.2,0.0);/材質自身發(fā)散的顏色pMaterial-SetExp(50);/ 高光指數(shù) break;case 5:/根pMaterial-SetAmbient(CRGB(0.192,0.192,0.192);/材質 對環(huán) 境光 的反射率pMaterial-SetDiffuse(CRGB(0C08,0.508,0.508);/材質對環(huán)境光和 漫反射光的反射率相等pMaterial-SetSpecular(CRGB(1.0,1.0,1.0);/M質對鏡面反射光的 反射率pMaterial-SetEmit(CRGB(0.2,0.2,0.2);/材質自身發(fā)散的顏色pMaterial-SetExp(50);/ 高光指數(shù) break;case 6:/紅寶石pMaterial-SetAmbien