A

 WEEK13

1.先寫入

void display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glutSwapBuffers();

}

int main(int argc,char** argv){

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutInitWindowSize(600,600);

    glutCreateWindow("week13_RECT_TRT");

    glutDisplayFunc(display);

    glutMainLoop();

}

2.在display()加    glRectf(0.3,0.5,-0.3,-0.5);//矩形

3.再加(畫手臂)glPushMatrix();glColor3f(1,0,0);///紅 glRectf(0.3,0.5,0.7,0.3);///手臂 glPopMatrix();

4.把手臂旋轉中心放到身體中心 glTranslatef(-0.3,-0.4,0);///把手臂旋轉中心放到中心

5.旋轉手臂角度float angle=45;glRotatef(angle,0,0,1);///旋轉

6.手臂掛回身體(右上) glTranslatef(0.3,0.4,0);///手臂掛到身體

7.讓手臂可以轉動(滑鼠控制)float oldX=0;void mouse(int button,int state,int x,int y){ oldX=x;}

void motion(int x,int y){ angle+=(x-oldX); oldX=x; glutPostRedisplay();///重畫畫面}

main加入glutMouseFunc(mouse);glutMotionFunc(motion);

1.加在上個glutPushMatrix()裡 glPushMatrix(); glRotatef(angle,0,0,1);///旋轉  glTranslatef(-0.3,-0.4,0);///把手臂旋轉中心放到中心  glColor3f(0,1,0);  glRectf(0.7,0.5,1.0,0.3);///手臂 glPopMatrix();

2.加入glTranslatef(0.7,.4,0);

1.複製glPushMatrix()程式，把X值數值設為負數(因為對稱在反方向)

glPushMatrix();

        glTranslatef(-0.3,0.4,0);///手臂掛到身體

        glRotatef(angle,0,0,1);///旋轉

        glTranslatef(0.3,-0.4,0);///把手臂旋轉中心放到中心

        glColor3f(1,0,0);///紅

        glRectf(-0.3,0.5,-0.7,0.3);///上手臂

        glPushMatrix();

            glTranslatef(-0.7,.4,0);

            glRotatef(angle,0,0,1);///旋轉

            glTranslatef(0.7,-0.4,0);///把手臂旋轉中心放到中心

            glColor3f(0,1,0);///紅

            glRectf(-0.7,0.5,-1.0,0.3);///下手臂

        glPopMatrix();

    glPopMatrix();

2.利用鍵盤和滑鼠搭配指定關節

float angle[20];

int angleID=0;

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

    if(key=='0')angleID=0;

    if(key=='1')angleID=1;

    if(key=='2')angleID=2;

    if(key=='3')angleID=3;

}

0對應上右臂;1對應下右臂;2對應上左臂;3對應下左臂;

motion裡面angle+=(x-oldX);改成angle[angleID]+=(x-oldX);

glPushMatrix()的angle改成angle[0],angle[1],angle[2],angle[3]

main()加入glutKeyboardFunc(keyboard);

程式碼

#include <GL/glut.h> float angle=0; void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glColor3f(1,1,1); ///白色 glutSolidTeapot(0.3);///茶壺身體 glPushMatrix(); glTranslatef(0.2,0,0);///3.將茶壺手臂往右邊移動 glRotatef(angle,0,0,1); ///2.旋轉 glTranslatef(0.2,0,0);/// 1.把茶壺旋轉中心放到世界中心 glColor3f(1,0,0);///紅色 glutSolidTeapot(0.2);///茶壺手臂 glPushMatrix(); glTranslatef(0.2,0,0);///3.將茶壺手臂往右邊移動 glRotatef(angle,0,0,1); ///2.旋轉 glTranslatef(0.2,0,0);/// 1.把茶壺旋轉中心放到世界中心 glColor3f(1,0,0);///紅色 glutSolidTeapot(0.2);///茶壺手臂 glPopMatrix(); glPopMatrix(); glPushMatrix(); glTranslatef(-0.2,0,0);///3.將茶壺手臂往右邊移動 glRotatef(-angle,0,0,1); ///2.旋轉 glTranslatef(-0.2,0,0);/// 1.把茶壺旋轉中心放到世界中心 glColor3f(1,0,0);///紅色 glutSolidTeapot(0.2);///茶壺手臂 glPushMatrix(); glTranslatef(-0.2,0,0);///3.將茶壺手臂往右邊移動 glRotatef(-angle,0,0,1); ///2.旋轉 glTranslatef(-0.2,0,0);/// 1.把茶壺旋轉中心放到世界中心 glColor3f(1,0,0);///紅色 glutSolidTeapot(0.2);///茶壺手臂 glPopMatrix(); glPopMatrix(); glutSwapBuffers(); angle+=0.05; } int main(int argc, char**argv) { glutInit( &argc, argv ); glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH); glutCreateWindow("week12 TRT"); glutIdleFunc(display); glutDisplayFunc(display); glutMainLoop(); }