出木杉英才的學霸之路 Week06

期中GL程式
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1:
打光
到 http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/
下載"data"，"win32"，"glut32.dll" 解壓縮到windlow檔案夾內

開啟 Light Material

上面可以選擇model

下面選擇物體材質

課堂作業2:
打開code blocks
#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_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("hello 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();

}

自行輸入 ↑

 

↑兩張圖用從原程式碼搜尋複製

↑完成圖

課堂作業3:

改變茶壺顏色

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

const GLfloat light_diffuse[]  = { 5.0f, 1.0f, 6.0f, 1.0f };

const GLfloat light_specular[] = { 1.0f, 1.0f, 6.0f, 1.0f };

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

課堂作業4:

改變光照的方向

#include <GL/glut.h>

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

const GLfloat light_diffuse[]  = { 1.0f, 5.0f, 1.0f, 1.0f };

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

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

const GLfloat mat_ambient[]    = { 1.0f, 1.0f, 0.7f, 1.0f };

const GLfloat mat_diffuse[]    = { 1.0f, 0.8f, 1.0f, 1.0f };

const GLfloat mat_specular[]   = { 1.0f, 1.0f, -0.5f, 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();

}

★RiSu★莊昀笙_Week06

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

作業1:



作業2:


作業3:


作業4:

BOZC Week06

课堂作业：

01：

02：

打开GLUT project,
key 入程式码：

#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_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("hello 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();
}

产生如下效果图：

03

改光

改變顏色

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

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };///顏色

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

const GLfloat high_shininess[] = { 100.0f };///集中度

课堂作业4：

key 入：

#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();

}

显示如下效果：

光源（position）随滑鼠位置改变

課堂作業

Week06 課堂作業

※課前講解期中考題

1.打光

打開Light&Material

左上角可以旋轉&和換物品

左下角可以換材質

2.程式碼

開啟Code Blocks 的 GLUT專案

#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_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("hello 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();

}

打光

3.改變光的值

改變顏色

修改

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

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };///顏色

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

const GLfloat high_shininess[] = { 100.0f };///集中度

4.用motion改光源

const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };將const=固定 刪除

加入motion

#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]);

}

加上glutMotionFunc(motion);

week06

(1)其中考考題

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();
glPopMatrix();//pop還原矩陣

(2)複習內容

(3)打光:教材(理論/實作 操作)
              實作

todo1

教材light material.exe
左上:調model
左下:material
右:屬性


可以換model

todo2

新glut專案
打光

#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};//打光源
const GLfloat high_shininess[]={100.0f};//光

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("hello 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();
}

todo3

調亮度

todo

用motion改光位置

#include <GL/glut.h>

const GLfloat light_ambient[]={2.0f,0.1f,0.0f,1.0f};

const GLfloat light_diffuse[]={3.0f,1.0f,2.0f,5.0f};

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,0.5f,0.8f,1.0f};

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

const GLfloat high_shininess[]={90.0f};

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

#include <stdio.h>

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

{

    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

    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);///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();

}

㍿ ✘✘✘✘DOPE✘✘✘✘ Week06

考試題目

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);//開始畫圖

glNormal3f(nx,ny,nz);//法向量


glTexCoord3f(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

先解壓縮freeglut


在使用GLUT



點開main.cpp

先不刪減任何程式預留剪貼程式

Ctrl+F Find "light"找到以下部分

貼上到 display() 前

Find "LIGHT0"

找到下列程式碼
貼入main函式裡頭

秀出立體茶壺且打光

此時position在5.0 為背面

所以茶壺呈現暗色

將光換面打光

此時position 在-5.0

所以此時茶壺呈現亮色

輸入程式碼

#include <GL/glut.h>
#include <stdio.h>
const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };///光的顏色
const GLfloat light_diffuse[]  = { 1.0f, 1.5f, 0.0f, 0.0f };
const GLfloat light_specular[] = { 2.0f, 2.0f, 0.0f, 2.0f };
GLfloat light_position[] = { -2.0f, -5.0f, -5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };///材質顏色
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)///光跟這滑鼠走
{
    light_position[0]=(x-150)/150.0;
    light_position[1]=-(y-150)/150.0;
    glLightfv(GL_LIGHT0,GL_POSITION,light_position);///重設光的位子
    glutPostRedisplay();///請glut送出Re重新 display顯示
    printf("%f %f\n",light_position[0],light_position[1]);
}
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("hello 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();
}
會變成

week06

1
期中考
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,tz);   //貼圖座標
          glColor3f(r,g,b);                   //色彩
          glVertex3f(x,y,z);                 //頂點
     glEnd();
glPopMatrix();                  //pop還原矩陣

2
下載jsyeh/3dcg10網頁裡的
windows、data和glut32.dll
開啟Light Material.exe,試著改變裡面的值

3
將茶壺的程式碼，加入light的程式碼
打光後讓茶壺看起來更立體
產生結果如下

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 };

float rotX=0;
void display()
{
    glClearColor(1,1,1,1);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(rotX, 0,1,0);
        glColor3f(1,0,0);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
void motion(int x, int y)
{
    rotX=x;
    display();
}
int main(int argc, char**argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE |GLUT_DEPTH);
    glutCreateWindow("hello");

    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);


    glutDisplayFunc(display);
    glutMotionFunc(motion);

    glutMainLoop();


}
4

更改光的位置讓茶壺可以更亮 
(const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };)

5

程式碼:

再利用motion函式 讓滑鼠可以改變光源位置

#include <GL/glut.h>
#include <stdio.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()
{
    glClearColor(1,1,1,1);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glutSolidTeapot(0.3);
    glutSwapBuffers();
}
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");

    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);


    glutDisplayFunc(display);
    glutMotionFunc(motion);

    glutMainLoop();


}