/*??CS?551?Assignment?1?skeleton?*/
/*??Brian?Clarke??*/
/*
	keyboard?controls:
	s/S:	Positive/negative?shoulder?rotation
	e/E:	Positive/negative?elbow?rotation
	O/C:	Open/Close?the?hand?--?YOU?GET?TO?IMPLEMENT?THIS
	
	x/X:	Positive/negative?X-axis?shift?of?the?model
	y/Y:	Positive/negative?Y-axis?shift?of?the?model
	UP/DOWN?ARROWS:	（zoom）?Z-axis?shift?of?the?model
	
	LEFT/RIGHT?ARROWS:	Y-axis?rotations
	PAGE?UP/DOWN:	X-axis?rotations
	ESC:	exit
*/
#include
#include
#include
#include

#define?ESC?27

static?GLfloat?red[]={100}green[]={010};?/*?blue[]={001};?*/
static?int?shoulder=0elbow=0;
static?int?xrot=0yrot=0zrot=0;
static?GLfloat?xshift=-1.0yshift=0.0zoom=-3.0;

/*?some?basic?GL?initialization?*/
void?init（）
{
	glClearColor（0.00.00.00.0）;
	glShadeModel（GL_FLAT）;
	glEnable（GL_DEPTH_TEST）;
	glEnable（GL_CULL_FACE）;
	glCullFace（GL_BACK）;
}

/*?The?display?callback?*/
void?draw_stuff（）
{
	glClear（GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT）;
	glLoadIdentity（）;
	glPushMatrix（）;
	glTranslatef（xshiftyshiftzoom）;
	glRotatef（（GLfloat）xrot1.00.00.0）;
	glRotatef（（GLfloat）yrot0.01.00.0）;
	glRotatef（（GLfloat）zrot0.00.01.0）;
	
	glColor3fv（red）;
	glPushMatrix（）;
	glTranslatef（-1.00.00.0）;
	glRotatef（（GLfloat）shoulder0.00.01.0）;
	glTranslatef（1.00.00.0）;
	glPushMatrix（）;
	glScalef（2.00.41.0）;
	glutSolidCube（1.0）;
	glPopMatrix（）;

	glColor3fv（green）;
	glTranslatef（1.00.00.0）;
	glRotatef（（GLfloat）elbow0.00.01.0）;
	glTranslatef（1.00.00.0）;
	glPushMatrix（）;
	glScalef（2.00.41.0）;
	glutSolidCube（1.0）;
	glPopMatrix（）;
	
	/*?Put?the?“hand“?code?here...*/
	
	glPopMatrix（）;
	glPopMatrix（）;
	glutSwapBuffers（）;
}

/*?the?window-reshape?callback?*/
void?reshape（int?w?int?h）
{
	glViewport（00（GLsizei）w（GLsizei）h）;
	glMatrixMode（GL_PROJECTION）;
	glLoadIdentity（）;
	gluPerspective（65.0（GLfloat）w/（GLfloat）h1.020.0）;
	glMatrixMode（GL_MODELVIEW）;
	glLoadIdentity（）;
	glTranslatef（0.00.0-5.0）;
}

/*?The?basic?keyboard?controls?callback?for?glutKeyboardFunc（）?*/
void?kb（unsigned?char?key?int?x?int?y）
{
	switch（key）
	{
		case?‘s‘:
			shoulder=（shoulder+5）%360;
			glutPostRedisplay（）;
			break;
		case?‘S‘:
			shoulder=（shoulder-5）%360;
			glutPostRedisplay（）;
			break;
		case?‘e‘:
			elbow=（elbow+5）%360;
			glutPostRedisplay（）;
			break;
		case?‘E‘:
			elbow=（elbow-5）%360;
			glutPostRedisplay（）;
			break;
		case?‘C‘:
			/*?close?the?“hand“?*/
			break;
		case?‘O‘:
			/*?open?the?“hand“?*/
			break;
		case?‘x‘:
			xshift+=.25;
			glutPostRedisplay（）;
			break;
		case?‘X‘:
			xshift-=.25;
			glutPostRedisplay（）;
			break;
		case?‘y‘:
			yshift+=.25;
			glutPostRedisplay（）;
			break;
		case?‘Y‘:
			yshift-=.25;
			glutPostRedisplay（）;
			break;
		case?‘r‘:
		case?‘R‘:
			xrot=yrot=zrot=shoulder=elbow=0;
			xshift=-1.0;
			yshift=0.0;
			zoom=-3.0;
			glutPostRedisplay（）;
			break;
		case?‘z‘:
			zrot=（zrot-1）%360;
			glutPostRedisplay（）;
			break;
		case?‘Z‘:
			zrot=（zrot+1）%360;
			glutPostRed