binhun-week04

貼上11行程式碼

#include <GL/glut.h>
void display()
{
    glClearColor(1.0,1.0,0.9,1.0);///清背景的鵝黃色
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}


int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("week04 keyboard mouse motion");
    glutDisplayFunc(display);
    glutMainLoop();
}

可以旋轉
#include <GL/glut.h>
float angle = 0;///旋轉角度
float s = 1;///縮放的比例
void display()
{
    glClearColor(1.0,0.0,0.9,1.0);///清背景的鵝黃色
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        ///glRotatef(angle,0,0,1);
        glScalef(s,s,s);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
void motion(int x,int y){
    ///angle = x;
    s = 1 = (x-150)/150.0;
    display();
}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("week04 keyboard mouse motion");
    glutDisplayFunc(display);
    glutMotionFunc(motion);
    glutMainLoop();
}
可以縮放大小

開新檔案 week04_keyboard_mouse_motion

 貼上11行程式碼

#include <GL/glut.h>
#include <stdio.h>//加上這行
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}
void keyboard(unsigned char key,int x,int y){
    printf("key: %c x: %d y: %d\n",key,x,y);//加上這行

}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("week04 keyboard mouse motion");
    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);//加上這行


    glutMainLoop();
}

按下按鍵會印出
再加上程式碼

void mouse(int button,int state,int x,int y){
    oldX = x;///當mouse按下時，記錄他的位置
}
void motion(int x,int y){
    angle += (x-oldX);
    oldX = x;
    display();
}
void keyboard(unsigned char key,int x,int y){
    printf("key: %c x: %d y: %d\n",key,x,y);
}

glutMouseFunc(mouse);
glutMotionFunc(motion);
float angle = 0,oldX = 0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(angle,0,0,1);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();

}
可以旋轉茶壺

下載範例
交換程式碼旋轉中心會不一樣

貼上前一個程式碼刪掉keyboard motion mouse
glutIdleFunc(display);///加這行有空就重設畫面
angle++會自動旋轉

#include <GL/glut.h>
#include <stdio.h>
float angle = 0,oldX = 0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
    glTranslatef(0.8,0,0);///放到右邊去
        glRotatef(angle++,0,0,1);///轉動中的
        glScalef(0.3,0.3,0.3);///小小的
        glutSolidTeapot(0.3);///茶壺
    glPopMatrix();
    glutSwapBuffers();

}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("week04 keyboard mouse motion");
    glutDisplayFunc(display);
    glutIdleFunc(display);///加這行有空就重設畫面
    glutMainLoop();
}

glClearColor(1.0,1.0,0.9,1.0);///背景
glColor3f(0,1,0);///綠色的
更改顏色
更換程式碼順序


開新檔案複製剛才程式碼改變兩行
交換
glRotatef(angle++,0,0,1);
glTranslatef(0.8,0,0);///放到右邊去