week03_焦焦焦焦焦焦焦

Week03 重寫GLUT範例

課堂作業1(複習) :

File - New Project - GLUT專案

#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();
}



老師解說 : (註解)



換背景顏色 :



老師解說(註解) :



課堂作業2

加入滑鼠資訊(座標)

#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);
    ///glutMotionFunc(motion);
    glutMainLoop();
}



老師解說(註解) :



課堂作業3

移動茶壺

#include <GL/glut.h>
float teapotX=0, teapotY=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    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();
}



老師解說 (註解):