week03

1.親手寫GLUT範例

#include <GL/glut.h>
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.3);

    glutSwapBuffers();
}

int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("Week03 mouse操作");

    glutDisplayFunc(display);


    glutMainLoop();
}

2.色彩+滑鼠

#include <GL/glut.h>

void display()

{

    glClearColor(1,1,0,1);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(0,1,0);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

#include <stdio.h>

void mouse(int button, int state, int x, int y)

{

    if(state==GLUT_DOWN) printf("glVertex2f(%f, %f);\n",(x-150)/150.0,-(y-150)/150.0);

}

int main(int argc, char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week03 mouse操作");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

3.移動+顯示座標

#include <GL/glut.h>
float teapotX=0, teapotY=0;
void display()
{
    glClearColor(1,1,0,1);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glColor3f(0,1,0);
    glPushMatrix();
        glTranslatef(teapotX, teapotY, 0);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
#include <stdio.h>
void mouse(int button, int state, int x, int y)
{
    if(state==GLUT_DOWN) printf("glVertex2f(%f, %f);\n",(x-150)/150.0,-(y-150)/150.0);
}
void motion(int x, int y)
{
    teapotX=(x-150)/150.0; teapotY= -(y-150)/150.0;
    printf("%d %d\n", x, y);
    glutPostRedisplay();
}
int main(int argc, char**argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("Week03 mouse操作");

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