10160783-week14 - 切換關節、移動、旋轉

 

記得加main()

1 - 開啟CodeBlocks ，新增OpenGL專案，File ➝ New ➝ Project
2 - 選取GLUT Project ➝ Go ➝ Next
3 - 點選三個點，點選目錄在桌面，加上專案名字 week14-1_timer，Next ➝ Finish\

4 - 點選 week14-1_timer ➝ Sources ➝ main.c，刪除所有程式碼，並輸入

include <GL/glut.h>

float angle=0;

void 

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glRotatef( angle, 0, 0, 1);

        glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(500, timer, t+1);

    angle += 90;

    glutPostRedisplay();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(2000, timer, 0);

    glutMainLoop();

}

week14-2_timer_play

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1):

        glutSolidTeapot(0.3);

    glutPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(500,timer,t+1);

    angle+=90;

    glutPostRedisplay;

}

void keyboard(unsigned char key,int x,int y)

{

    glutTimerFunc(0,timer,0);

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutkeyboardFunc(keyboard);

    ///glutTimerFunc(2000,timer,0);

    glutMainLoop();

}

week14-3_timer_alpha_interpolation

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1):

        glutSolidTeapot(0.3);

    glutPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    if(t<100)glutTimerFunc(50,timer,t+1);

    float alpha = t /100.0;

    angle=newAngle*alpha+(1-alpha)*oldAngle;

    glutPostRedisplay;

}

void motion(int x,int y)

{

    angle=x;

    glutPostRedisplay;

}

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

{

    if(state==GLUT_DOWN) oldAngle=x;

    if(state==GLUT_UP) newAngle=x;

    glutPostRedisplay;

}

void keyboard(unsigned char key,int x,int y)

{

    glutTimerFunc(0,timer,0);

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutkeyboardFunc(keyboard);

    glutMouseFunc(Mouse);

    glutMotionFunc(Motion);

    ///glutTimerFunc(2000,timer,0);

    glutMainLoop();

}

week14-3_timer_alpha_interpolation