week05 Heng's

前言:

下載 。data 。windows 。glut32.dll

http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/

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前面都刪

加入藍色圈圈內的程式碼

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gepth test
    glEnable(GL_DEPTH_TEST);

#include<GL/glut.h>
///打光第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 };///燈光打的位置(不背光)




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gepth test
    glEnable(GL_DEPTH_TEST);

    ///打光: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);
    ///2.2:要打物體設定好它的meterial
    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);
    ///其實原本177行程裡已經有打光需要的程式
    glutMainLoop();

    return EXIT_SUCCESS;
}

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跟著滑鼠移動的光

void motion(int x,int y)///讓光源移動
{
    GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f};///TODO:陣列，放位置
    light_position[0]=(x-150)/150.0*10;///TODO:用motion的x座標算光ㄉ位置
    light_position[1]=-(y-150)/150.0*10;
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);///TODO:用函式把光設好
    glutPostRedisplay();///TODO:貼個post請glut重畫畫面
}

glutMotionFunc(motion);///TODO:現在我們想要讓光源動，用montion函式做http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/