//********************************************
// lab3.cpp
//********************************************



#include "stdafx.h"
#include "Tool.h"

#include "ToolDoc.h"
#include "RenderView.h"
#include <math.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#ifndef M_PI
#define M_PI 3.141592654
#endif


void CRenderView::drawSphere(double r)
{

	float no_mat[] = {0.0f, 0.0f, 0.0f, 1.0f};
    float mat_ambient[] = {0.7f, 0.7f, 0.7f, 1.0f};
    float mat_ambient_color[] = {0.8f, 0.8f, 0.2f, 1.0f};
    float mat_diffuse[] = {0.1f, 0.5f, 0.8f, 1.0f};
    float no_shininess = 0.0f;
    float mat_emission[] = {0.3f, 0.2f, 0.2f, 0.0f};
    glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);

	if(m_Highlight)
	{
		// your codes for highlight here
	} else {
		glMaterialfv(GL_FRONT, GL_SPECULAR, no_mat);
		glMaterialf(GL_FRONT, GL_SHININESS, no_shininess);
	}

    glMaterialfv(GL_FRONT, GL_EMISSION, no_mat);

    int i,j;
	int n = 20;
    for(i=0;i<n;i++)
		for(j=0;j<2*n;j++)
		if(m_Smooth)
		{
			glBegin(GL_POLYGON);

			    // the normal of each vertex is actaully its own coordinates normalized for a sphere

			    // your normal here
				glVertex3d(r*sin(i*M_PI/n)*cos(j*M_PI/n),r*cos(i*M_PI/n)*cos(j*M_PI/n),r*sin(j*M_PI/n));
			    // your normal here
				glVertex3d(r*sin((i+1)*M_PI/n)*cos(j*M_PI/n),r*cos((i+1)*M_PI/n)*cos(j*M_PI/n),r*sin(j*M_PI/n));
			    // your normal here
				glVertex3d(r*sin((i+1)*M_PI/n)*cos((j+1)*M_PI/n),r*cos((i+1)*M_PI/n)*cos((j+1)*M_PI/n),r*sin((j+1)*M_PI/n));
			    // your normal here
				glVertex3d(r*sin(i*M_PI/n)*cos((j+1)*M_PI/n),r*cos(i*M_PI/n)*cos((j+1)*M_PI/n),r*sin((j+1)*M_PI/n));
 			glEnd();
		} else	{
			glBegin(GL_POLYGON);
			    // Explanation: the normal of the whole polygon is the coordinate of the center of the polygon for a sphere
			    glNormal3d(sin((i+0.5)*M_PI/n)*cos((j+0.5)*M_PI/n),cos((i+0.5)*M_PI/n)*cos((j+0.5)*M_PI/n),sin((j+0.5)*M_PI/n));
				glVertex3d(r*sin(i*M_PI/n)*cos(j*M_PI/n),r*cos(i*M_PI/n)*cos(j*M_PI/n),r*sin(j*M_PI/n));
				glVertex3d(r*sin((i+1)*M_PI/n)*cos(j*M_PI/n),r*cos((i+1)*M_PI/n)*cos(j*M_PI/n),r*sin(j*M_PI/n));
				glVertex3d(r*sin((i+1)*M_PI/n)*cos((j+1)*M_PI/n),r*cos((i+1)*M_PI/n)*cos((j+1)*M_PI/n),r*sin((j+1)*M_PI/n));
				glVertex3d(r*sin(i*M_PI/n)*cos((j+1)*M_PI/n),r*cos(i*M_PI/n)*cos((j+1)*M_PI/n),r*sin((j+1)*M_PI/n));
 			glEnd();
		}

}


void CRenderView::drawMyCreation()
{
	// your composite obejct here
}

void CRenderView::drawScene()
{

	switch(obj_no) {
		case 0:
			drawSphere();
			break;
		case 1:
			// your primitive objects here
			break;
		case 2:
			drawMyCreation();
			break;
		case 3:

			// your another compsite object here
			break;
		default:
			break;
	};
}