WEEK14_CASH

甚麼叫做TRT？

就是將各種物件利用關節的概念一個一個把它們串起來。

#include <GL/glut.h>

float angle=0,oldX=0,oldY=0;

void drawBody()

{

    glPushMatrix();

        glScalef(1,0.5,0.5);

        glutSolidCube(1);

    glPopMatrix();

}

void drawArm()

{

    glPushMatrix();

        glScalef(0.6,0.3,0.3);

        glutSolidCube(1);

    glPopMatrix();

}

void display()

{

    GLfloat pos[]={0,0,-1,0};    ///打光

    glLightfv(GL_LIGHT0,GL_POSITION,pos);

    glEnable(GL_LIGHT0);

    glEnable(GL_LIGHTING);

    glEnable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(0.5,0,0);  ///step4:把"會對Arm Joint做旋轉的東西"再移到右上 掛上去

        glRotatef(angle,0,0,1); ///step3:把下面整團都對中間旋轉

        glTranslatef(0.25,0,0);  ///step2:把他往右移,Arm Joint在中間

        drawArm();  ///step1:這是一個Arm

        glPushMatrix();

            glTranslatef(0.25,0,0);  ///step4:把"會對Arm Joint做旋轉的東西"再移到右上 掛上去

            glRotatef(angle,0,0,1); ///step3:把下面整團都對中間旋轉

            glTranslatef(0.25,0,0);  ///step2:把他往右移,Arm Joint在中間

            drawArm();  ///step1:這是一個Arm

    glPopMatrix();

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.5,0,0);  ///step4:把"會對Arm Joint做旋轉的東西"再移到右上 掛上去

        glRotatef(-angle,0,0,1); ///step3:把下面整團都對中間旋轉

        glTranslatef(-0.25,0,0);  ///step2:把他往右移,Arm Joint在中間

        drawArm();  ///step1:這是一個Arm

        glPushMatrix();

        glTranslatef(-0.25,0,0);  ///step4:把"會對Arm Joint做旋轉的東西"再移到右上 掛上去

    glRotatef(-angle,0,0,1); ///step3:把下面整團都對中間旋轉

    glTranslatef(-0.25,0,0);  ///step2:把他往右移,Arm Joint在中間

    drawArm();  ///step1:這是一個Arm

    glPopMatrix();

    glPopMatrix();

    drawBody();

    glFlush();

}

void motion(int x,int y)

{

    angle-=y-oldY;

    oldY=y;oldX=x;

}

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

{

    if(state==GLUT_DOWN)

    {

        oldX=x;oldY=y;

    }

}

void timer(int t)

{

    glutTimerFunc(20,timer,t+1);

    //angle++;

    glutPostRedisplay();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutCreateWindow("T-R-T test");

    glutDisplayFunc(display);

    glutTimerFunc(20,timer,0);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}