廖婕珊hw6

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
            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:打光(教材操作)

左上角按右鍵--可換Model


左下角按右鍵--可換Material


右邊按右鍵--可換屬性值


移動右邊的數值觀察變化

課堂作業二:打光copy

#include <GL/glut.h>

///光的變化

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 };

///材質的變化

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_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("hellow 3D");

    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();

}

課堂作業三:變換數值

課堂作業四:可以移動光源

#include <GL/glut.h>

#include <stdio.h>

const GLfloat light_ambient[]  = { 0.0f, 1.0f, 0.4f, 0.0f };

const GLfloat light_diffuse[]  = { 0.9f, 0.0f, 0.0f, 1.0f };

const GLfloat light_specular[] = { 1.0f, 0.0f, 0.0f, 0.0f };

GLfloat light_position[]={2.0f, 5.0f, -5.0f, 0.0f};

const GLfloat mat_ambient[]    = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat mat_diffuse[]    = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat high_shininess[] = { 100.0f };

void motion(int x, int y)///滑鼠按下後的motion函式

{

    light_position[0]=(x-150)/150.0;

    light_position[1]=-(y-150)/150.0;

    glLightfv(GL_LIGHT0, GL_POSITION, light_position);///重設光位置

    glutPostRedisplay();///請glut送出Re重新 display顯示

}

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_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("hellow 3D");

    glutDisplayFunc(display);

    glutMotionFunc(motion);///加入motion函式

    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();

}