2022電腦圖學二甲: 一定是大拇指的啦

step 0 :下載模型

0.0 jsyeh.org/3dcg10 下載 data.zip , windows.zip

0.1 data.zip =>下載/windows/data

windows.zip => 下載/windows/Transformation.exe

step 1 : 打光

1.1 開啟 window/Light & Material

1.2 程式碼介紹 :

1.glLightfv(...)中fv是float vector(陣列)

2.GLfloat light_pos[]={....}; 陣列

3.glLightfv(GL_LIGHT0 , GL_POSITION , 陣列 )

第幾個燈設定它的位置

4.光的性質 ( 位置 , Ambient , Diffuse , Specular ) 大概翻譯

無處不在的光特別的光

有角度的光

step 2 : 實作

2.1 開新專案 , 命名為week06_light

2.2 Ctrl_F,搜尋light

2.3 留下開頭陣列及main函式

2.4 貼上程式碼

#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 }; /// -5.0f是亮的 , 5.0是暗的

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()///茶壺

{

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);

///留下的程式碼 , 要放在glutCreateWindow後才會有效

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);

///放在glutMainLoop()之前

glutMainLoop();///否則卡在這裡,之後的程式,都不會執行到

}

Step 3 : 加入mouse , motion , rotate函式

3.1 開新專案 , 命名為week06_light_mouse_motion

3.2 貼上上週程式碼( mouse , motion , 初始值 )

#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=0.1;

float oldX=0 , oldY=0;

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

glPushMatrix();

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

glScalef(scale , scale , scale);///x, y, z 等比例放大

glColor3f(1,1,0);

glutSolidTeapot( 0.8 );

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; ///滑鼠往右放大1.01倍

if ( mouseX-oldX < 0 ) scale *= 0.99;///滑鼠往左縮小0.99倍

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

oldX=mouseX; oldY=mouseY;

display();

}

int main(int argc, char **argv )

{

glutInit( &argc , argv );

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow(" week06 light");

glutDisplayFunc(display);

glutMotionFunc(motion);

glutMouseFunc(mouse);

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();

}

3.3 新增角度程式碼

#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 x=150 , y=150 , z=0 ,scale=0.5 , angle=0.1; ///新增angle

float oldX=0 , oldY=0;

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

glPushMatrix();

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

glRotatef(angle , x, y ,z);///轉angle角度

glScalef(scale , scale , scale);

glColor3f(1,1,0);

glutSolidTeapot( 0.8 );

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);///angle角度大小

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

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

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

oldX=mouseX;

oldY=mouseY;

display();

}

int main(int argc, char **argv )

{

glutInit( &argc , argv );

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow(" week06 light");

glutDisplayFunc(display);

glutMotionFunc(motion);

glutMouseFunc(mouse);

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();

}

step 4 : 整合light , mouse , motion , rotate函式

4.1開新專案命名為week06_light_mouse_motion_rotate

4.2新增keyboard函式 (按鍵盤旋轉用)

4.3 貼上程式碼

#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 x=150 , y=150 , z=0 ,scale=0.5 , angle=0.1;

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

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

glPushMatrix();

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

glRotatef(angle , x, y ,z);

glScalef(scale , scale , scale);

glColor3f(1,1,0);

glutSolidTeapot( 0.8 );

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 ){ ///移動

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

else if ( now == 2 ){///轉動

angle += (mouseX - oldX);

}

else if ( now == 3 ){///縮放

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(" week06 light");

glutDisplayFunc(display);

glutMotionFunc(motion);

glutMouseFunc(mouse);

glutKeyboardFunc(keyboard);///keyboard用

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

一定是大拇指的啦

沒有留言:

張貼留言

VERY BEAUTIFUL, VERY POWERFUL

2022年3月29日 星期二

一定是大拇指的啦

沒有留言:

張貼留言

VERY BEAUTIFUL, VERY POWERFUL

2022年3月29日星期二