// cube.cpp - implementation for Cube class
// (C)2001 Nicholas Davies

#include "cube.h"

const float Cube::Vertices[8][3] = 
{
    { -0.5,  0.5,  0.5 },
    { -0.5, -0.5,  0.5 },
    {  0.5, -0.5,  0.5 },
    {  0.5,  0.5,  0.5 },
    { -0.5,  0.5, -0.5 },
    { -0.5, -0.5, -0.5 },
    {  0.5, -0.5, -0.5 },
    {  0.5,  0.5, -0.5 }
};

const int Cube::Indices[6][4] = 
{
    { 0, 1, 2, 3 },    
    { 7, 6, 5, 4 },    
    { 3, 2, 6, 7 },    
    { 1, 0, 4, 5 },    
    { 0, 3, 7, 4 },    
    { 5, 6, 2, 1 }    
};
    
const float Cube::Colors[6][4] = 
{
    { 1.0, 0.0, 0.0, 0.5 },
    { 0.0, 1.0, 0.0, 0.5 },
    { 0.0, 0.0, 1.0, 0.5 },
    { 1.0, 1.0, 0.0, 0.5 },
    { 0.0, 1.0, 1.0, 0.5 },
    { 1.0, 0.0, 1.0, 0.5 }
};

Cube::Cube(float x, float y, float z, float side_length)
     : sl(side_length), x(x), y(y), z(z), xrot(0.0), yrot(0.0), zrot(0.0)
{
}

void Cube::Update()
{
    if(key[KEY_UP])     xrot -= 2.0;
    if(key[KEY_DOWN])   xrot += 2.0;
    if(key[KEY_LEFT])   yrot -= 2.0;
    if(key[KEY_RIGHT])  yrot += 2.0;
    if(key[KEY_X])      zrot -= 2.0;
    if(key[KEY_Z])      zrot += 2.0;
}

void Cube::Render()
{
    glPushMatrix();

    //glLoadIdentity();
    
    glTranslatef(x, y, z);
    glScalef(sl, sl, sl);
    glRotatef(xrot, 1.0, 0.0, 0.0);
    glRotatef(yrot, 0.0, 1.0, 0.0);
    glRotatef(zrot, 0.0, 0.0, 1.0);

    glBegin(GL_QUADS);
        for(int i = 0; i < 6; i++)
        {
            glColor4fv(Colors[i]);

				glTexCoord2f(Vertices[Indices[i][0]][0]+0.5, Vertices[Indices[i][0]][1]+0.5);
            glVertex3fv(Vertices[Indices[i][0]]);

				glTexCoord2f(Vertices[Indices[i][1]][0]+0.5, Vertices[Indices[i][1]][1]+0.5);
            glVertex3fv(Vertices[Indices[i][1]]);

				glTexCoord2f(Vertices[Indices[i][2]][0]+0.5, Vertices[Indices[i][2]][1]+0.5);
            glVertex3fv(Vertices[Indices[i][2]]);

				glTexCoord2f(Vertices[Indices[i][3]][0]+0.5, Vertices[Indices[i][3]][1]+0.5);
            glVertex3fv(Vertices[Indices[i][3]]);
        }
    glEnd();
//    glFlush();
    
    glPopMatrix();
}