標楷體

跟上禮拜一樣，下載三個檔案分別是:[data][win32] glut32.dll 
將檔案解壓縮後放進window 資料夾裡 開啟Light Material

上moodle下載freeglut叫出程式碼
#include <GL/glut.h>
///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 };
/* Program entry point */
void display(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glutSolidTeapot(0.3);
glutSwapBuffers();
}
int main(int argc, char *argv[])
{glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("GLUT Shapes");
glutDisplayFunc(display);
///打光也需要 3D的 depth test
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
///打光1:要開啟光線, 原來範例就寫好了
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LIGHTING);
///打光2:要設定光light的設定值 (前⾯有陣列,這裡拿來⽤
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: 要把物體也設定好它的 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);
///原本177⾏程裡,已經有打光需要的程式了
glutMainLoop();
return EXIT_SUCCESS;

}

叫出有光影的茶壺

光影移動茶壺:

#include <GL/glut.h>

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 };

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

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的x坐標,算光的位置

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

glLightfv(GL_LIGHT0,GL_POSITION,light_position);///⽤函式,把光設好

glutPostRedisplay();///貼個post請GLUT重畫畫⾯

}

///所增加的程式碼

int main(int argc,char *argv[])

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("GLUT Shapes");

glutDisplayFunc(display);

glutMotionFunc(motion);

///現在我們想要光源動,⽤motion函式做

glEnable(GL_DEPTH_TEST);

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);

glutMainLoop();

return EXIT_SUCCESS;

}