02160040 周子伍 week05

旋轉的立體四方形

#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 main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutCreateWindow("02160040");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();

}

如上圖但改了顏色還有變成可以用滑鼠操控!

程式碼有稍微變動 如下

#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();

    glColor3f(0,1,0);

    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("02160040");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMotionFunc(motion);///mouse motion drag動作移動的函示

    glutMainLoop();

}