本人發言不代表本人立場 week14

主題：Timer & 動畫

0. 複習

MAYA export :

• 有貼圖 >>> GLM_TEXTURE
• 有material >>> GLM_MATERIAL

1. 寫程式(counter)

• 開GLUT專案 => 備份main.cpp

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    ///glutSolidSphere(0.3,30,30);///實心

    glutWireSphere(0.3,30,30);///線框

    glutSwapBuffers();

}

int main(int argc,char ** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutMainLoop();

} 

執行結果(實心、框線) : 

 

• 加上timer

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glutWireSphere(0.3,30,30);

    glutSwapBuffers();

}

void timer(int t)

{

    glClearColor(1,0,0,0);

    display();

}

int main(int argc,char ** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(3000,timer,0);

    glutMainLoop();

}

執行結果:

• 畫會旋轉的方塊

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glutSolidCube(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{ 

    glutTimerFunc(30,timer,t+1);///20: 50fps, 30: 33fps, 50: 20fps ///不能設太小

    glClearColor(1,0,0,0);

    angle++;

    display();///重畫畫面

}

int main(int argc,char ** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(3000,timer,0);

    glutMainLoop();

}

執行結果:

• 特定角度旋轉

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glutSolidCube(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int diff=2;

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    glClearColor(1,0,0,0);

    if(angle>90)diff=-2;

    if(angle<0) diff=+2;

    angle+=diff;

    display();

}

int main(int argc,char ** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(3000,timer,0);

    glutMainLoop();

}

執行結果:

• 加上TRT轉動
• 先畫簡易圖形

#include <GL/glut.h>

float angle=0;

void drawArm1()

{

    glPushMatrix();

        glScalef(1,0.5,0.5);

        glColor3f(1,0,0);

        glutSolidCube(0.2);

    glPopMatrix();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glColor3f(1,1,1);

        glutSolidCube(0.4);

        glPushMatrix();

            glTranslatef(-0.2,0.15,0);

            glRotatef(angle,0,0,1);

            glTranslatef(-0.1,0,0);

            drawArm1();

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int diff=2;

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    if(angle>90)diff=-2;

    if(angle<0) diff=+2;

    angle+=diff;

    display();

}

int main(int argc,char ** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(3000,timer,0);

    ///glutTimerFunc()

    glutMainLoop();

}

執行結果: