2022電腦圖學二甲: 哈囉你好嗎隨便week06

1. 打光範例

去https://jsyeh.org/3dcg10/

下載 data跟win32

把data丟在win32

執行 Light Material.exe

可以去玩他

lgLightfv(.........) fv=float vector (陣列)

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

lgLightfv(GL_LIGHT0(第幾個燈),GL_POSITION(他的位址),陣列)

2.實作

開glut範例 ctri-F找light

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 };///常駐的

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

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

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

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);

3.課堂作業

#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 };///常駐的

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

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

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

void display()

{

glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///清畫面

glColor3f(0,1,1);///顏色(RGB)

glutSolidTeapot(0.3);///就一個神燈

glutSwapBuffers();///畫好提交

}

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

{

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

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );///雙緩衝區+3D深度功能

glutCreateWindow("light");///開GLUT視窗

glutDisplayFunc(display);///用來顯示的函式

///要放在glutCreateWindow(....)之後才會有效

glEnable(GL_DEPTH_TEST);///3d功能

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);

///要放在glutMainLoop(....)之前

glutMainLoop();

}

3.縮放與旋轉

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

int oldX=0, oldY=0;

void display()

{

glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );///畫圖前, 先清畫面

glPushMatrix();///備份矩陣

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

glRotatef(angle, 0,1,0);///對Y做旋轉

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

glColor3f(1,1,0);///黃色

glutSolidTeapot(0.3);

glPopMatrix();///還原矩陣

glutSwapBuffers();///畫好後,交換出來

}

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

///為了解決瞬間移動的問題,改用延續拖移

oldX=mouseX;

oldY=mouseY;

}

void motion(int mouseX,int mouseY){

angle+=(mouseX-oldX);///旋轉

if(mouseX-oldX>0) scale *=1.01;///縮放

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

/*x+=(mouseX-oldX);

y+=(mouseY-oldY);*/

oldX=mouseX;

oldY=mouseY;

display();///重畫

}

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_LIGHT0);

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);

glutMouseFunc(mouse);///第一代主角

glutMotionFunc(motion);///第二代主角

glutMainLoop(); ///主要的程式迴圈

}

4.一堆東西合起來

用鍵盤輸入要控制移動、旋轉還是縮放

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

int oldX=0, oldY=0, now=1;///1.移動 2.旋轉 3.縮放

void display()

{

glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );///畫圖前, 先清畫面

glPushMatrix();///備份矩陣

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

glRotatef(angle, 0, 1, 0);///對Y軸旋轉

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

glColor3f(1,1,0);///黃色

glutSolidTeapot(0.3);

glPopMatrix();///還原矩陣

glutSwapBuffers();///畫好後,交換出來

}

void keyboard(unsigned char key, int mouseX, int mouseY){///輸入中文會被os擋住

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

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

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

}

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

///為了解決瞬間移動的問題,改用延續拖移

oldX=mouseX;

oldY=mouseY;

}

void motion(int mouseX,int mouseY){

if(now==1){

x+=(mouseX-oldX);///移動

y+=(mouseY-oldY);

}

else if(now==2){

angle += (mouseX - oldX);///旋轉

}

else if(now==3){

if(mouseX-oldX>0) scale *=1.01;///縮放

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

}

oldX=mouseX;

oldY=mouseY;

display();///重畫

}

int main(int argc,char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week06 Light");

glutDisplayFunc(display);

glEnable(GL_DEPTH_TEST);///3D功能

glDepthFunc(GL_LIGHT0);///定義一盞燈

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);

glutKeyboardFunc(keyboard);///第0代主角

glutMouseFunc(mouse);///第一代主角

glutMotionFunc(motion);///第二代主角

glutMainLoop(); ///主要的程式迴圈

}

2022電腦圖學二甲

2022年3月29日星期二

哈囉你好嗎隨便week06

沒有留言:

張貼留言

VERY BEAUTIFUL, VERY POWERFUL

2022年3月29日 星期二

哈囉你好嗎隨便week06

沒有留言:

張貼留言

VERY BEAUTIFUL, VERY POWERFUL

2022年3月29日星期二