WEEK 3 CheXi

1.複習茶壺



2.得到滑鼠座標


程式碼:

#include <math.h>
#include <stdio.h>
#include <GL/glut.h>

void mouse(int button, int state, int x, int y)
{
    printf("%d %d %d %d\n", button,state,x,y);
}

void display()
{
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}

int main(int argc, char*argv[])
{
   glutInit( &argc,argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
   glutCreateWindow("04160674 Number1");

   glutDisplayFunc(display);
   glutMouseFunc(mouse);
   glutMainLoop();
}


3.改變顏色

程式碼:

#include <math.h>
#include <stdio.h>
#include <GL/glut.h>

void display()
{
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}

void mouse(int button, int state, int x, int y)
{
    printf("%d %d %d %d\n", button,state,x,y);
    glColor3f(1, x/300.0, y/300.0);
    glutPostRedisplay();
}


int main(int argc, char*argv[])
{
   glutInit( &argc,argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
   glutCreateWindow("04160674 Number1");

   glutDisplayFunc(display);
   glutMouseFunc(mouse);
   glutMainLoop();
}

4.滑鼠拖曳變顏色

程式碼:

#include <math.h>
#include <stdio.h>
#include <GL/glut.h>

void mouse(int button, int state, int x, int y)
{
    printf("%d %d %d %d\n", button,state,x,y);
}

void motion(int x,int y)
{
    printf("%d %d\n",x,y);
    glColor3f(1,x/500.0,y/500.0);
    glutPostRedisplay();
}

void display()
{
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}

int main(int argc, char*argv[])
{
   glutInit( &argc,argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
   glutInitWindowSize(500,500);
   glutCreateWindow("04160674 Number1");

   glutDisplayFunc(display);
   glutMouseFunc(mouse);
   glutMotionFunc(motion);

   glutMainLoop();
}

5.圓形

程式碼:

#include <math.h>
#include <stdio.h>
#include <GL/glut.h>

void motion(int x,int y)
{
    glColor3f(1,x/500.0,y/500.0);
    glutPostRedisplay();
}

void mouse(int button, int state, int x, int y)
{
    if(state==GLUT_DOWN) printf("glVertex2f(%.2f,%.2f);\n",(x-250)/250.0,-(y-250)/250.0);

}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glBegin(GL_POLYGON);
        for(float angle=0; angle<3.1415926*2; angle+=0.001){
            glVertex2f(cos(angle),sin(angle));
        }
    glEnd();
    glutSwapBuffers();
}

int main(int argc, char*argv[])
{
   glutInit( &argc,argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
   glutInitWindowSize(500,500);
   glutCreateWindow("04160674 Number1");

   glutDisplayFunc(display);
   glutMouseFunc(mouse);
   glutMotionFunc(motion);

   glutMainLoop();
}