Week06 蔡宜真

期中考題

glPushMatrix();   //push 備份矩陣

    glTranslatef( x, y, z);//移動

    glRotatef(角度, 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();//結束

glPopMatrix(); //pop還原矩陣

課堂作業1

前往教材 jsyeh.org/3dcg10
下載 [source][data][win32][glut32.dll]
做Light&Material練習 

打光★

課堂作業2

做出有光澤感的茶壺★

crtl+F (搜尋light，並複製程式碼)

const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };//這行要記得改-5.0f

程式碼:

#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_DEPTH);

    glutCreateWindow("hello");

    glutDisplayFunc(display);

    glClearColor(1,1,1,1);

      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();

    return EXIT_SUCCESS;

}

課堂作業3

光的移動位置★

程式碼

#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 motion(int x,int y)///滑鼠的 motion函式

{

 light_position[0] =(x-150)/150.0*5; ///換算出 光源x 的新的位置(*5是因為z是-5.0)

 light_position[1] =-(y-150)/150.0*5;///換算出 光源y 的新的位置(所以換算到-5~ +5間)

 glLightfv(GL_LIGHT0, GL_POSITION,light_position);

 glutPostRedisplay();///display(); ///glut貼個Post文章,請glut 重新(re)顯示display

}

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_DEPTH);

    glutCreateWindow("hello");

    glutDisplayFunc(display);

    glutMotionFunc(motion);///加入滑鼠的 motion函式

    glClearColor(1,1,1,1);

      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();

    return EXIT_SUCCESS;

}

課堂作業四

改變顏色☆

更改const GLfloat light_diffuse[]  = { 1.2f, 0.2f, 1.0f, 1.0f }; 程式碼