02161061_陳侑增

#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); =====>把方形連在一起變長條形
            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();
}
int main(int argc,char **argv)
{
    glutInit(&argc,argv);
    glutCreateWindow("02161061");
    glutDisplayFunc(display);
    glutIdleFunc(display);
    glutMainLoop();
}

一步一步從面到會轉動的長方形。

#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();

}

int oldX=0;

void motion(int x,int y)

{

    angle+=(x-oldX);

    oldX=x;

}

int main(int argc,char **argv)

{

    glutInit(&argc,argv);

    glutCreateWindow("02161061");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}

多了幾行 就可以用滑鼠轉圖形了 = =+