幽羊山之土-Week05_旋轉

1.主題:旋轉Rotation

120.125.89.81 老師IP
Rotate 旋轉

    glRotatef(a,x,y,z);

2.實作:glRotatef()

到 http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/ 
       --> 下載: windows.zip, data.zip, glut32.dll (week03

執行 Transformation.exe 檔案

glTranslatef(x,y,z);  //移動

glRotatef(a,x,y,z);  //旋轉
a:角度 ,x:左右軸 ,y:上下軸 ,z:前後軸
glScalef(x,y,z);  //縮放



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開啟GLUT程式 (week01

進入transmission zero 網站,下載"freeglut 3.0.0 MinGW Package"
在 CodeBlocks 開啟GLUTproject
寫自動轉程式:
#include <GL/glut.h>
float angle=0;  //now!角度
void display(){
    glClear(GL_COLOR_BUFFER_BIT | GL_COLOR_BUFFER_BIT);///清除殘影
    glPushMatrix(); //備份矩陣
        glRotatef(angle,0,1,0); //now!旋轉,對y軸
        glutSolidTeapot(0.3);
    glPopMatrix(); //還原矩陣
    glutSwapBuffers();
    angle+=3;  //now!
}
int main(int argc,char**argv){
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("Week05 rotate");
    glutDisplayFunc(display);
    glutIdleFunc(display); //now! Idle 沒事,就重畫
    glutMainLoop();
}

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3.滑鼠 轉.(自動 轉

#include <GL/glut.h>
#include <stdio.h>
float angle=0; //now!角度
void display(){
    glClear(GL_COLOR_BUFFER_BIT | GL_COLOR_BUFFER_BIT);//清除殘影
    glPushMatrix(); //備份矩陣
        glRotatef(angle,0,1,0);//now!旋轉,對y軸
        glutSolidTeapot(0.3);
    glPopMatrix(); //還原矩陣
    glutSwapBuffers();
}
void motion(int x,int y){
    angle=x; ///now!滑鼠
    display(); ///now!馬上更新
}
void mouse(int button,int state,int x,int y){
    printf("%d %d %d %d\n",button,state,x,y);
}
int main(int argc,char**argv){
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("Week05 rotate");

    glutDisplayFunc(display);
    glutIdleFunc(display);//now! Idle 沒事,就重畫
    glutMotionFunc(motion);///now!滑鼠滑動
    glutMouseFunc(mouse);///now!滑鼠點放

    glutMainLoop();
}