2022電腦圖學二甲

2022年3月29日星期二

圖學筆記Week06

本週課程內容:光源、滑鼠移動茶壺(光源)、期中內容

步驟:進入老師的網站https://jsyeh.org/3dcg10-->下載Win32、data

-->解壓縮data到windows(左鍵可旋轉，右鍵左上改模型，右鍵左下改材質)

(下列fv是陣列，GL_light0是第幾盞燈)

光源

步驟:開啟新專案-->運用專案中的光源區程式(如下圖)-->加上上週的茶壺程式(如下圖)

滑鼠移動茶壺(光源)

步驟:開啟新專案-->運用上方光源區程式-->加上上週的茶壺程式(如下圖)-->最終完全版(可移動、旋轉、縮放)

期中內容

glPushMatrix();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

glColor3f(r,g,b);色彩

glNormal3f(nx,ny,nz);光法向量

glTextCoord2f(tx,ty);貼圖座標

glVertex3f(x,y,z);頂點

glEnd();

glPopMatrix();還原矩陣

AAA 圖學筆記第六周

week06打光

https://jsyeh.org/3dcg10/下載 data win32

windows.zip => 下載 \windows\Light Material.exe

(左上)右鍵，換模型

(左下)右鍵，換Meterial

(左下)右鍵，換模型

實作

freeglut裝好，改lib

Ctrl-F找 light

偷程式碼

#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);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

int main(int argc,char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week06 light");

glutDisplayFunc(display);

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();

}

了解打光的作法

#include <GL/glut.h>

#include <stdio.h>

float x=150, y=150, z=0, scale=1.0;

int oldX=0, oldY=0;

void display()

{

glClearColor( 0.5, 0.5, 0.5, 1 );///R,G,B,A 其中A半透明功能,目前沒開

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();///備份矩陣

glTranslatef( (x-150)/150.0 , -(y-150)/150.0 ,z);

glScalef(scale, scale, scale);///都縮放成 scale倍

glColor3f(1,1,0);///黃色的

glutSolidTeapot( 0.3 );///茶壼

glPopMatrix();///還原矩陣

glutSwapBuffers();

}

void keyboard( unsigned char key, int mouseX, int mouseY )

{

}

void mouse(int button, int state, int mouseX, int mouseY )

{///為了解決瞬間移動的錯誤,我們改用正確的方法

oldX = mouseX; oldY = mouseY;

}

void motion(int mouseX, int mouseY)

{

if( mouseX-oldX > 0 ) scale *= 1.01;

if( mouseX-oldX < 0 ) scale *= 0.99;

///x += (mouseX-oldX); y += (mouseY-oldY);

oldX = mouseX; oldY = mouseY;

display();

}

#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);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

int main(int argc,char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week06 light");

glutDisplayFunc(display);

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();

}

整合打光+上周交的

WEEK06_燈光筆記

step01_講解光的性質:

Ambient

Diffuse 擴散

Specular 反射

step02_偷之前(六個紅紅)的程式碼，找到light函式

複製到自己的程式裡

程式碼:

#include <GL/glut.h> ///使用GLUT外掛,簡化程式

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 );

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glutSwapBuffers();///畫好後,交換出來

}

int main(int argc, char** argv) ///main()主函式進階版

{

glutInit( &argc, argv); ///把參數,送給 glutInit 初始化

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH ); ///雙緩衡區 + 3D深度功能

glutCreateWindow("第06週的程式哦!");

glutDisplayFunc(display); ///用來顯示的函式

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();

}

step02-2 把上週縮放的程式碼加進去，光線要跟著物體縮放改變

程式碼:

#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 };

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 x=150, y=150, z=0, scale=1.0;

int oldX=0, oldY=0;

void display()

{

glClearColor( 0.5, 0.5, 0.5, 1 );

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef((x-150)/150.0 , -(y-150)/150.0 ,z );

glScalef(scale, scale, scale);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void keyboard( unsigned char key, int x, int y)

{

}

void mouse (int button,int state,int mouseX,int mouseY)

{

oldX = mouseX; oldY = mouseY;

}

void motion(int mouseX,int mouseY)

{

if( mouseX-oldX > 0) scale *= 1.01;

if( mouseX-oldX < 0) scale *= 0.99;

oldX = mouseX; oldY = mouseY;

display();

}

int main(int argc, char**argv)

{

glutInit( &argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("Week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

step03 加入angle，讓茶壺有選轉的效果

#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 };

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 x=150, y=150, z=0, scale=1.0, angle=0.0;

int oldX=0, oldY=0;

void display()

{

glClearColor( 0.5, 0.5, 0.5, 1 );

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef((x-150)/150.0 , -(y-150)/150.0 ,z );

glRotatef(angle, 0,1,0);

glScalef(scale, scale, scale);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void keyboard( unsigned char key, int x, int y)

{

}

void mouse (int button,int state,int mouseX,int mouseY)

{

oldX = mouseX; oldY = mouseY;

}

void motion(int mouseX,int mouseY)

{

angle += (mouseX-oldX);

oldX = mouseX; oldY = mouseY;

display();

}

int main(int argc, char**argv)

{

glutInit( &argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("Week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

week06

期中內容

glPushMatrix();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
glColor3f(r,g,b);色彩
glNormal3f(nx,ny,nz);光法向量
glTextCoord2f(tx,ty);貼圖座標
glVertex3f(x,y,z);頂點
glEnd();//結束
glPopMatrix();還原矩陣

#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);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

int main(int argc,char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 light");

glutDisplayFunc(display);

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();

}

2-5.(拿上次的程式碼改)+上面部分程式

#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 };

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 x=150,y=150,z=0,scale=1.0 ,angle=0.0;

int oldX=0,oldY=0;

void display()

{

glClearColor(0.5,0.5,0.5,1);

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef((x-150)/150.0,-(y-150)/150.0,z);

glRotatef(angle,0,1,0);

glScalef(scale,scale,scale);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void keyboard (unsigned char key, int mousex ,int mousey)

{

}

void mouse(int button,int state,int mousex,int mousey)

{

oldX=mousex; oldY=mousey;

}

void motion(int mousex,int mousey)

{

angle+=(mousex-oldX);

oldX=mousex; oldY=mousey;

display();

}

int main(int argc,char**argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("Week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

2-6.

#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 };

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 x=150,y=150,z=0,scale=1.0 ,angle=0.0;

int oldX=0,oldY=0,now=1;///now:1移動,2轉動,3縮放

void display()

{

glClearColor(0.5,0.5,0.5,1);

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef((x-150)/150.0,-(y-150)/150.0,z);

glRotatef(angle,0,1,0);

glScalef(scale,scale,scale);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void keyboard (unsigned char key, int mousex ,int mousey)

{

if(key=='1' ||key=='w' || key=='W') now=1;///移動

if(key=='2' ||key=='e' || key=='E') now=2;///轉動

if(key=='3' ||key=='r' || key=='R') now=3;///縮放

}

void mouse(int button,int state,int mousex,int mousey)

{

oldX=mousex; oldY=mousey;

}

void motion(int mousex,int mousey)

{

if(now==1){

x+=(mousex-oldX); y+=(mousey-oldY);///移動

}

else if(now==2){

angle+=(mousex-oldX);///轉動

}

else if(now==3){

if(mousex-oldX>0) scale*=1.01;

if(mousex-oldX>0) scale*=0.99;///縮放

}

oldX=mousex; oldY=mousey;

display();

}

int main(int argc,char**argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("Week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

電腦圖學筆記Week06

Week06

主題:打光

開啟的程式: Light Material.exe

(左上)左鍵按住拖曳可旋轉物體

(左上)右鍵，更換模型

(左下)右鍵，更換材質

[右邊的程式 glLightfv() => fv 為 float vector (陣列)

GLfloat light_pos[] = {-2.0, 2.0, 2.0, 1.0}; 陣列

glLightfv(GL_LIGHT0, GL_POSTION, 陣列)

第幾個燈

設定它的位置]

1.光的性質

(1)開啟CodeBlocks

(2)找到與Light有關的程式(先複製，下一個程式需要)

---------------------------------------------------------------------------------------

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 };

---------------------------------------------------------------------------------------

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);

---------------------------------------------------------------------------------------

(3)今天的第一個程式碼

#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);

glColor3f(1, 1, 0);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 Light");

glutDisplayFunc(display);

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();

}

(3-1)將上週的滑鼠函式加進去

#include <GL/glut.h>

#include <stdio.h>

float x=150, y=150, z=0, scale=1.0;

int oldX=0, oldY=0;

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);

glPopMatrix();

glTranslatef((x-150)/150.0, -(y-150)/150.0, z);

glScalef(scale, scale, scale);

glColor3f(1, 1, 0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void mouse(int button, int state, int mouseX, int mouseY)

{

oldX=mouseX;

oldY=mouseY;

}

void motion(int mouseX, int mouseY)

{

if(mouseX-oldX>0) scale*=1.01;

if(mouseY-oldY<0) scale*=0.99;

oldX=mouseX;

oldY=mouseY;

display();

}

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 Light");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

(物體會隨著滑鼠拖曳放大或縮小)

(3-2)完成上星期的程式並修改

#include <GL/glut.h>

#include <stdio.h>

float x=150, y=150, z=0, scale=1.0, angle=0.0;

int oldX=0, oldY=0;

void display()

{

glClearColor(0.5, 0.5, 0.5, 1);

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef( (x-150)/150.0, -(y-150)/150.0, z);

glRotatef(angle, 0, 1, 0);

glScalef(scale, scale, scale);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void keyboard( unsigned char key, int mouseX, int mouseY)

{

}

void mouse( int button, int state, int mouseX, int mouseY)

{

oldX = mouseX;

oldY = mouseY;

}

void motion( int mouseX, int mouseY)

{

angle+=(mouseX-oldX);

///if(mouseX-oldX > 0) scale*=1.01;

///if(mouseX-oldX < 0) scale*=0.99;

///x+=(mouseX-oldX);

///y+=(mouseY-oldY);

oldX = mouseX;

oldY = mouseY;

display();

}

int main(int argc, char**argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("Week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

glutMainLoop();

}

(滑鼠拖曳可旋轉物體)

(3-3)最後的修改

#include <GL/glut.h>

#include <stdio.h>

float x=150, y=150, z=0, scale=1.0, angle=0.0;

int oldX=0, oldY=0, now=1;

void display()

{

glClearColor(0.5, 0.5, 0.5, 1);

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef( (x-150)/150.0, -(y-150)/150.0, z);

glRotatef(angle, 0, 1, 0);

glScalef(scale, scale, scale);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void keyboard( unsigned char key, int mouseX, int mouseY)

{

if(key=='1' || key=='w' || key=='W') now=1;

if(key=='2' || key=='e' || key=='E') now=2;

if(key=='3' || key=='r' || key=='R') now=3;

}

void mouse( int button, int state, int mouseX, int mouseY)

{

oldX = mouseX;

oldY = mouseY;

}

void motion( int mouseX, int mouseY)

{

if(now==1)

{

x+=(mouseX-oldX);

y+=(mouseY-oldY);

}

else if(now==2)

{

angle+=(mouseX=oldX);

}

else if(now==3)

{

if(mouseX-oldX>0) scale*=1.01;

if(mouseY-oldY<0) scale*=0.99;

}

oldX = mouseX;

oldY = mouseY;

display();

}

int main(int argc, char**argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("Week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

glutMainLoop();

}

(透過滑鼠將物體進行移動、旋轉、縮放)

week06電腦圖學

week06

1.開啟GLUT專案，ctrl+F搜尋light可找到下方這些程式碼

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 }; glEnable(GL_DEPTH_TEST);///3D功能 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); 2.茶壺打光

#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 };

const GLfloat high_shininess[] = { 100.0f };

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

int main(int argc,char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 light");

glutDisplayFunc(display);

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();

}

3.茶壺旋轉打光

#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 };

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 x=150,y=150,z=0,angle=0.0;

int oldX=0,oldY=0;

void display()

{

glClearColor(0.5,0.5,0.5,1);

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef((x-150)/150.0,-(y-150)/150.0,z);

glRotatef(angle,0,1,0);///軸心:y軸

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void mouse(int button,int state,int mouseX,int mouseY)

{

oldX=mouseX; oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

angle+=(mouseX-oldX);

oldX=mouseX; oldY=mouseY;

display();

}

int main(int argc,char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 light");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

5.茶壺移動旋轉縮放

#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 };

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 x=150,y=150,z=0,angle=0.0;

int oldX=0,oldY=0;

void display()

{

glClearColor(0.5,0.5,0.5,1);

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef((x-150)/150.0,-(y-150)/150.0,z);

glRotatef(angle,0,1,0);///軸心:y軸

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void mouse(int button,int state,int mouseX,int mouseY)

{

oldX=mouseX; oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

angle+=(mouseX-oldX);

oldX=mouseX; oldY=mouseY;

display();

}

int main(int argc,char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 light");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutMotionFunc(motion);

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();

}

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2022年3月29日 星期二

2022年3月29日星期二