week07

期中考的考題

glPushMatrix();  //push備份矩陣
glTranslatef(x,y,z);  //移動
glRotatef(angle,x,y,z);  //旋轉
glScalef(x,y,z);  //縮放
glBegin(GL_POLYGON);  //(多邊形)開始畫
glNormal3f(nx,ny,nz);  //法向量
glTexCoord2f(tx,ty);  //貼圖座標
glColor3f(r,g,b);  //色彩
gltertex3f(x,y,z);  //頂點
glEnd();
glPopMatrix();  //Pop還原矩陣



打光的雕像

#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, 0.0f, 0.0f };///光角度 第三位是Z軸(正面)

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()
{
    glClearColor(1,1,1,1);
    glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);///後面是影像深度(3D)
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}

int main(int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("hello3D");
    glutDisplayFunc(display);
    glClearColor(1,1,1,1);///茶壺顏色
    glEnable(GL_CULL_FACE);
    glCullFace(GL_BACK);

    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);

    glutMainLoop();
}