Week06：打光

範例 http://jsyeh.org/3dcg10
1. 下載網頁中的data, win32

2. 將windows解壓縮, data.zip/data丟進解壓縮後的windows資料夾

3.開啟Light Material.exe
左上視窗點擊滑鼠右鍵：變更模型
右邊視窗點擊滑鼠右鍵：變更調整參數
左下視窗點擊滑鼠右鍵：變更模型的材質(Materials)

右方函式glLightfv()：
fv = float vector (浮點數陣列)

glLightfv(GL_LIGHT0，GL_POSITION，light_pos)

　第0道光　　　位置陣列

打光Light

開啟OpenGL新專案，按下Ctrl+f搜尋light

複製light陣列宣告與函式呼叫，並加上之前的茶壺程式碼

```

#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 };

///以上是複製的程式碼(陣列宣告)

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);

///以下是複製的程式碼(函式呼叫)

///複製的程式碼要放在glutCreateWindow()之後才有效

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();ˇ一

}

```

或是將複製的陣列宣告與函式呼叫植入上週的程式碼

```

#include <stdio.h>///印出用

#include <GL/glut.h>

///打光陣列

/*這裡放陣列宣告*/

float x=150, y=150, z=0, scale=1.0;///座標設定為150, 150在視窗正中央

int oldX=0, oldY=0;

void display()

{

glClearColor(0.5, 0.5, 0.5, 1);///灰色背景R,G,B,A 其中A為半透明Alpha值

glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);

glPushMatrix();///備分矩陣

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

glScalef(scale, scale, scale);///x,y,z縮放為 scale倍，維持原有比例

glColor3f(1, 1, 0);

glutSolidTeapot(0.3);

glPopMatrix();///還原矩陣

glutSwapBuffers();

}

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

{///重設圖案位置，避免瞬間移動的問題

oldX = mouseX; oldY = mouseY;

}

void motion(int mouseX, int mouseY)

{

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

if(mouseX-oldX <0) scale *=0.99;///+-百分之一

oldX = mouseX;

oldY = mouseY;

display();

}

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

{

}

int main(int argc, char** argv)

{

glutInit( &argc, argv);

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow("week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);///鍵盤事件函式

glutMouseFunc(mouse);

glutMotionFunc(motion);

/*這裡放函式呼叫*/

glutMainLoop();

}

```

續上週：旋轉

加上新的變數(angle)與glRoataef()函式

```

#include <stdio.h>///印出用

#include <GL/glut.h>

///打光陣列

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;///座標設定為150, 150在視窗正中央

int oldX=0, oldY=0;

void display()

{

glClearColor(0.5, 0.5, 0.5, 1);///灰色背景R,G,B,A 其中A為半透明Alpha值

glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);

glPushMatrix();///備分矩陣

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

glRotatef(angle, 0, 1, 0);///對Y軸轉動

glScalef(scale, scale, scale);///x,y,z縮放為 scale倍，維持原有比例

glColor3f(1, 1, 0);

glutSolidTeapot(0.3);

glPopMatrix();///還原矩陣

glutSwapBuffers();

}

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

{///重設圖案位置，避免瞬間移動的問題

oldX = mouseX; oldY = mouseY;

}

void motion(int mouseX, int mouseY)

{

angle += (mouseX-oldX);///轉動

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

///if(mouseX-oldX <0) scale *=0.99;///+-百分之一

///oldX = mouseX;///移動

///oldY = mouseY;

display();

}

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

{

}

int main(int argc, char** argv)

{

glutInit( &argc, argv);

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow("week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);///鍵盤事件函式

glutMouseFunc(mouse);

glutMotionFunc(motion);

///打光函式

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();

}

```

Keybaord()函式輸入切換功能

```

#include <stdio.h>///印出用

#include <GL/glut.h>

///打光陣列

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;///座標設定為150, 150在視窗正中央

int oldX=0, oldY=0, now=1;///設定now變數切換功能

void display()

{

glClearColor(0.5, 0.5, 0.5, 1);///灰色背景R,G,B,A 其中A為半透明Alpha值

glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);

glPushMatrix();///備分矩陣

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

glRotatef(angle, 0, 1, 0);///對Y軸轉動

glScalef(scale, scale, scale);///x,y,z縮放為 scale倍，維持原有比例

glColor3f(1, 1, 0);

glutSolidTeapot(0.3);

glPopMatrix();///還原矩陣

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)

{///重設圖案位置，避免瞬間移動的問題

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);///轉動

}

else if(now==3)

{

if(mouseX-oldX >0) scale *=1.01;///縮放

if(mouseX-oldX <0) scale *=0.99;///+-百分之一

}

display();

}

int main(int argc, char** argv)

{

glutInit( &argc, argv);

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow("week05 keyboard");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);///鍵盤事件函式

glutMouseFunc(mouse);

glutMotionFunc(motion);

///打光函式

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();

}

```

2022電腦圖學二甲

2022年3月29日星期二

爆肝week06

Week06：打光

範例 http://jsyeh.org/3dcg10
1. 下載網頁中的data, win32

續上週：旋轉

沒有留言:

張貼留言

VERY BEAUTIFUL, VERY POWERFUL

2022年3月29日 星期二

爆肝week06

Week06：打光

範例 http://jsyeh.org/3dcg101. 下載網頁中的data, win32

續上週：旋轉

沒有留言:

張貼留言

VERY BEAUTIFUL, VERY POWERFUL

2022年3月29日星期二

範例 http://jsyeh.org/3dcg10
1. 下載網頁中的data, win32