weeeeek06

期中考內容!!!

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






課堂作業 1

http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/

下載 

1. data  2. window32  3. glut32dill

解壓縮檔

解壓縮window32到桌面
解壓縮data到window32裡

把glut32dill執行檔放到winow32裡面

開啟 Light & Material

左上視窗 更改Model
左下視窗 更改Material
右邊視窗 更改屬性









課堂作業 2

*複製程式然後打光

#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);
    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();
}

課堂作業 3

改變數值觀察光的顏色及位置

課堂作業 4

使用滑鼠移動光的位置



#include <GL/glut.h>
const GLfloat light_ambient[]={0.0f,0.0f,0.0f,1.0f};
const GLfloat light_diffuse[]={1.0f,0.0f,0.0f,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) ///滑鼠按下後motion格式
{
    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();
    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();
}