week 04 賀冠傑

1. 作業互評上傳

2. 移動
glTranslatef(0,0.1,0);

*但是只會往同一個方向移動，而且按到就會一直移動

->

#include<GL/glut.h>
float nowX=0, nowY=0;
void mouse (int button, int state, int x, int y)
{
    nowX = (x-150)/150.0;
    nowY = -(y-150)/150.0;
}
void display()
{
    glClearColor(1,1,0,0);
    glClear(GL_COLOR_BUFFER_BIT);

    glPushMatrix(); //備份Matrix
        glTranslatef(nowX, nowY, 0); // " 移動 "
        glColor3f(1,0,0);
        glutSolidTeapot(0.3);
    glPopMatrix(); //還原Matrix
    glutSwapBuffers();
}
int main(int argc,char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("hello 3D");
    glutDisplayFunc(display);
    glutMouseFunc(mouse);
    glutMainLoop();
}

*滑鼠點到哪，物件就移動到哪

3. 畫圓形

glBegin(GL_POLYGON);
            for(float angle=0; angle<3.14159265358979*2; angle+=0.1){
                glVertex2f(0.2*cos(angle),0.2*sin(angle) );
            }
glEnd();