Week06

 #期中考題目

期中考題jsyeh.org/gl/會用Moodle考

模擬練習

#week06-0_sample

1.安裝freeglut,把lib\libfreeglut.a複製成libglut32.a

2.File-New-Project,GLUT專案

3.Ctrl-F 找程式碼 light

找到程式碼,有兩大塊:宣告、函式

'''cpp

glEnable(GL_DEPTH_TEST);

    glDepthFunc(GL_LESS);

    glEnable(GL_LIGHT0);

    glEnable(GL_NORMALIZE);

    glEnable(GL_COLOR_MATERIAL);

    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);

    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);

    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);

    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);

    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);

    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

'''

'''cpp

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };

const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };

const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat high_shininess[] = { 100.0f };

'''

#weel06-1_lighting
1.File-New-Project,GLUT專案
2.貼上GLUT 11行程式
3.貼上剛剛week06-0_sample裡找到打光的程式碼
4.執行時,發現茶壺暗暗的,因為它背光,要改光線位置

5.第15行改成{2.0f,5.0f,-5.0f,0.0f}

6.第13行改成{1.0f,1.0f,0.0f,1.0f}

#課本範例

1.jsyeh.org/3dcg10 下載source data win32

2.windows.zip => 下載\windows\Light Material.exe

3.data.zip => 下載\windows\data\一堆模型檔

#week06-2_lighting_glNormal3f

1.1.File-New-Project,GLUT專案

2.把剛剛的程式 week06-1_lighting拿來用

3.加上四邊形,有設定法向量

'''cpp

glBegin(GL_POLYGON);

    glNormal3f(0,0,1);//打光的法向量

    glVertex2f(-1,-1);

    glVertex2f(+1,-1);

    glVertex2f(+1,+1);

    glVertex2f(-1,+1);

glEnd();

'''

#week06-3_glm_obj_model

1.File-New-Project,GLUT專案

2.貼上GLUT 11行程式

3.從課本範例source.zip有3個程式檔:transformation.c glm.h glm.c解壓縮

4.要將專案做設定

4.1.把glm.h放到桌面\week06-3_glm_obj_model目錄裡

4.2.把glm.c放到桌面\week06-3_glm_obj_model目錄裡,改檔名glm.cpp

4.3.在專案裡按右鍵Add Files,加入glm.cpp

4.4.要把data資料夾,放到桌面\freeglut\bin目錄裡