電腦圖學week07

期中考題:

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);  //開始畫

      glNormal3f( nx, ny, nz);  //法向量

      glTexCoord2f( tx, ty);  //貼圖座標

      glColor3f( r, g, b);  //色彩

      glVertex3f( x, y, z);  //頂點

   glEnd( );

glPopMatrix( );  //Pop還原矩陣


課堂作業一:



課堂作業二:

#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();
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("GLUT Shapes");
    glutDisplayFunc(display);

    glClearColor(1,1,1,1);
    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();
}

#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};

    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();

}

#include<stdio.h>

void motion(int x, int y)

{

    light_position[0]=(x-150)/150.0;

    light_position[1]=-(y-150)/150.0;

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glutPostRedisplay();

    printf("%f %f\n", light_position[0],light_position[1]);

}

int main(int argc, char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("hello 3D");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glClearColor(1,1,1,1);

    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();

}