02160074_張凱晴 week05

本周重點：自製3D模型、利用mouse旋轉

1.先開啟上周的甜甜圈

2.glBegin(GL_LINE_LOOP); ///將線連成四方形

glBegin(GL_POLYGON);///四方形

3.glBegin(GL_QUAD_STRIP);///將兩面的連接，變成一個四方體

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glVertex3f(0.2,-0.2,0.5);

    glVertex3f(0.2,-0.2,-0.5);

    glVertex3f(-0.2,-0.2,0.5);

    glVertex3f(-0.2,-0.2,-0.5);

    glVertex3f(-0.2,0.2,0.5);

    glVertex3f(-0.2,0.2,-0.5);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glEnd();

4.將四方體加上邊線(圖中白色的線)↓↓↓

側邊的線↓↓↓

glBegin(GL_LINES);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glVertex3f(0.2,-0.2,0.5);

    glVertex3f(0.2,-0.2,-0.5);

    glVertex3f(-0.2,-0.2,0.5);

    glVertex3f(-0.2,-0.2,-0.5);

    glVertex3f(-0.2,0.2,0.5);

    glVertex3f(-0.2,0.2,-0.5);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glEnd();

5.利用 mouse 旋轉，先在 main 增加glutMotionFunc(motion);///mouse的拖曳

增加 motion 函式，印出座標可知道滑鼠所在位置

如何使四方體不是透明的?

在 main 裡面 glutInit(&argc,argv);下一行增加

 glutInitDisplayMode(GLUT_DEPTH);///讓顯示的Window有3D深度的功能

glEnable(GL_DEPTH_TEST);///開啟GL_DEPTH_TEST深度測試，讓近的面擋住遠的面

 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

完整程式↓↓↓

#include <GL/glut.h>

#include <stdio.h>

float angleX=0,angleY=0;

void display()

{

    glEnable(GL_DEPTH_TEST);///開啟GL_DEPTH_TEST深度測試，讓近的面擋住遠的面

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    glRotatef(angleX,0,1,0);///左右轉動

    glRotatef(angleY,1,0,0);///上下轉動

    glColor3f(0,0.5,0.8);///畫面

    glBegin(GL_LINE_LOOP);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,-0.2,0.5);

    glVertex3f(-0.2,-0.2,0.5);

    glVertex3f(-0.2,0.2,0.5);

    glEnd();

    glBegin(GL_POLYGON);

    glVertex3f(0.2,0.2,-0.5);

    glVertex3f(0.2,-0.2,-0.5);

    glVertex3f(-0.2,-0.2,-0.5);

    glVertex3f(-0.2,0.2,-0.5);

    glEnd();

    glBegin(GL_QUAD_STRIP);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glVertex3f(0.2,-0.2,0.5);

    glVertex3f(0.2,-0.2,-0.5);

    glVertex3f(-0.2,-0.2,0.5);

    glVertex3f(-0.2,-0.2,-0.5);

    glVertex3f(-0.2,0.2,0.5);

    glVertex3f(-0.2,0.2,-0.5);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glEnd();///以上為畫面的

    glColor3f(1,1,1);///從這邊開始畫線

    glBegin(GL_LINE_LOOP);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,-0.2,0.5);

    glVertex3f(-0.2,-0.2,0.5);

    glVertex3f(-0.2,0.2,0.5);

    glEnd();

    glBegin(GL_LINE_LOOP);

    glVertex3f(0.2,0.2,-0.5);

    glVertex3f(0.2,-0.2,-0.5);

    glVertex3f(-0.2,-0.2,-0.5);

    glVertex3f(-0.2,0.2,-0.5);

    glEnd();

    glBegin(GL_LINES);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glVertex3f(0.2,-0.2,0.5);

    glVertex3f(0.2,-0.2,-0.5);

    glVertex3f(-0.2,-0.2,0.5);

    glVertex3f(-0.2,-0.2,-0.5);

    glVertex3f(-0.2,0.2,0.5);

    glVertex3f(-0.2,0.2,-0.5);

    glVertex3f(0.2,0.2,0.5);

    glVertex3f(0.2,0.2,-0.5);

    glEnd();

    glPopMatrix();

    glFlush();

    //angle+=0.05;

}

void motion(int x, int y)

{

    printf("%d %d\n", x, y);///印出座標

    angleX=x;

    angleY=y;

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DEPTH);///讓顯示的Window有3D深度的功能

    glutCreateWindow("02160074");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    ///glutMouseFunc();///mouse的三個按鍵，按下去DOWN/彈起來UP

    glutMotionFunc(motion);///mouse的拖曳

    glutMainLoop();

}