02160154_周芮安,week05

製作3D圖形

先製作出一個四邊形

void display()

{

        glClear(GL_COLOR_BUFFER_BIT);

  glPushMatrix();

            glRotatef( angle,  0, 1, 0.5);

            glBegin(GL_POLYGON);;

                glColor3f(1,0,0);

                glVertex3f(0.1,0.1,0.8);

                glVertex3f(-0.1,0.1,0.8);

                glVertex3f(-0.1,-0.1,0.8);

                glVertex3f(0.1,-0.1,0.8);

            glEnd();

產生出旋轉的四面體

#include<GL/glut.h>

float angle=0;

void display()

{

        glClear(GL_COLOR_BUFFER_BIT);

        glPushMatrix();

            glRotatef( angle,  0, 1, 0.5);

            glBegin(GL_POLYGON);;

                glColor3f(1,0,0);

                glVertex3f(0.1,0.1,0.8);

                glVertex3f(-0.1,0.1,0.8);

                glVertex3f(-0.1,-0.1,0.8);

                glVertex3f(0.1,-0.1,0.8);

            glEnd();

            glBegin(GL_POLYGON);;

                glColor3f(1,0,0);

                glVertex3f(0.1,0.1,-0.8);

                glVertex3f(-0.1,0.1,-0.8);

                glVertex3f(-0.1,-0.1,-0.8);

                glVertex3f(0.1,-0.1,-0.8);

            glEnd();

            glBegin(GL_QUAD_STRIP);

                glVertex3f(0.1,0.1,0.8);

                glVertex3f(0.1,0.1,-0.8);

                glVertex3f(-0.1,0.1,0.8);

                glVertex3f(-0.1,0.1,-0.8);

                glVertex3f(-0.1,-0.1,0.8);

                glVertex3f(-0.1,-0.1,-0.8);

                glVertex3f(0.1,-0.1,0.8);

                glVertex3f(0.1,-0.1,-0.8);

                glEnd();

        glPopMatrix();

        angle += 0.01;

        glFlush();

}

使滑鼠可移動圖形
但此圖形依然在轉動
int oldX=0;
void motion(int x,int y)
{
    angle += (x-oldX);
    oldX=x;
}

int main(int argc, char **argv)
{
    glutInit(&argc,argv);
    glutCreateWindow("02160154flight");
    glutDisplayFunc(display);
    glutIdleFunc(display);
    glutMotionFunc(motion);///mouse motion drag動作移動的函式
    glutMainLoop();
}