week5 汪.

Light Material

//打光的第0步.宣告陣列,裡面有光的屬性值
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 };
打光也需要3D的Depth Test
glEnable(GL_DEPTH_TEST);
打光1.要開啟光線
 glEnable(GL_LIGHT0);
  glEnable(GL_NORMALIZE);
  glEnable(GL_COLOR_MATERIAL);

  glEnable(GL_LIGHTING);
打光2.要設定光的light的設定值
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);

打光2.2要把物體也設定好他的material

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);

"成品"

想要讓光源動,用motion函式做

void motion(int x,int y)

{

    GLfloat light_position[]={2.0f,5.0f,-5.0f,0.0f};//陣列放位置

    light_position[0]=(x-150)/150.0*10;//用motion x座標,算光的位置

    light_position[1]=-(y-150)/150.0*10;

    glLightfv(GL_LIGHT0,GL_POSITION,light_position);用函式把光設定好

    glutPostRedisplay();貼個post讓GLUT重劃畫面

}

glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glEnable(GL_DEPTH_TEST);想要讓光源動,用motion函式做