week05

我做的是一隻紫色的小魚兒

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT);

    glPushMatrix();//備份Matrix

      glRotatef(angle,0,1,0.5);//轉動

      glBegin(GL_POLYGON);;//開始畫圖形 我的圖形是魚

        glColor3f(0.8,0.5,0.8);//我選擇了紫色好吃的顏色

        glVertex3f( -0.5, -0.5, 0.1);

        glVertex3f(   -1,    0, 0.1);

        glVertex3f( -0.5,  0.5, 0.1);

        glVertex3f(    0,    0, 0.1);

  glEnd();

 glBegin(GL_POLYGON);;

        glVertex3f(    0,    0, 0.1);

        glVertex3f(  0.3, -0.3, 0.1);

        glVertex3f(  0.3,  0.3, 0.1);

    glEnd();

      glBegin(GL_POLYGON);;//這是另一個面

        glColor3f(0.8,0.5,0.8);

        glVertex3f( -0.5, -0.5, -0.1);

        glVertex3f(   -1,    0, -0.1);

        glVertex3f( -0.5,  0.5, -0.1);

        glVertex3f(    0,    0, -0.1);

    glEnd();

 glBegin(GL_POLYGON);;

        glVertex3f(   0,    0, -0.1);

        glVertex3f( 0.3, -0.3, -0.1);

        glVertex3f( 0.3,  0.3, -0.1);

    glEnd();

    glBegin(GL_QUAD_STRIP);;

        glVertex3f( -0.5, -0.5, 0.1);glVertex3f( -0.5, -0.5, -0.1);

        glVertex3f(   -1,    0, 0.1);glVertex3f(   -1,    0, -0.1);

        glVertex3f( -0.5,  0.5, 0.1);glVertex3f( -0.5,  0.5, -0.1);

        glVertex3f(    0,    0, 0.1);glVertex3f(    0,    0, -0.1);

    glEnd();

    glBegin(GL_QUAD_STRIP);;

      glVertex3f(    0,    0, 0.1);glVertex3f(   0,    0, -0.1);

      glVertex3f(  0.3, -0.3, 0.1);glVertex3f( 0.3, -0.3, -0.1);

      glVertex3f(  0.3,  0.3, 0.1);glVertex3f( 0.3,  0.3, -0.1);

    glEnd();

    glPopMatrix();//還原Matrix

    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("02160252");

    glutDisplayFunc(display);

    glutIdleFunc(display);

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

    glutMainLoop();

}