//
//  Acorn.cpp
//  
//
//  Created by Matthew Pick on 12/7/14.
//
//

#include "Acorn.h"
#include <GLUT/glut.h>
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#include <iostream>
using namespace std;


const float EXPLODE_Y_RADIUS = .15;
const float EXPLODE_X_RADIUS = .08;

const int START_EXPLODE_COUNTER = 10;

const float Y_TRANSLATE = .07;

Acorn::Acorn(float xPos, float yPos, int tex, int acornExplodeTex){
    centerX = xPos;
    centerY = yPos;
    
    acornTex = tex;
    explodeTex = acornExplodeTex;
    explode = false;
    dead  = false;
    explodeCounter = START_EXPLODE_COUNTER;
}


void Acorn::translateAcorn(){
    centerY += Y_TRANSLATE;
//    cout << "in translate " << centerY << endl;
}

bool Acorn::isDead(){
    return dead;
}


void Acorn::draw(){
    GLuint tex = -1;
    
    float xRad;
    float yRad;
    
    if (!explode){
        xRad = X_RADIUS;
        yRad = Y_RADIUS;
        
        tex = acornTex;
    }
    else {
        // draw exploded
        if (explodeCounter == 0) dead = true;
        else explodeCounter--;
        xRad = EXPLODE_X_RADIUS;
        yRad = EXPLODE_Y_RADIUS;
//        xRad = X_RADIUS;
//        yRad = Y_RADIUS;
        
        tex = explodeTex;
    }
    
    glEnable(GL_TEXTURE_2D);
    glEnable(GL_ALPHA_TEST);
    
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
    glColor4f(1, 1, 1, 1);
    
    glBegin(GL_QUADS);
    
        glTexCoord2d(0, 0);
        glVertex2f(centerX-xRad, centerY-yRad);
        
        glTexCoord2d(0,1);
        glVertex2f(centerX-xRad, centerY+yRad);
        
        glTexCoord2d(1,1);
        glVertex2f(centerX+xRad, centerY+yRad);
        
        glTexCoord2d(1,0);
        glVertex2f(centerX+xRad, centerY-yRad);
        
    glEnd();
    
    glDisable(GL_TEXTURE_2D);
    glDisable(GL_ALPHA_TEST);

    if (!explode) translateAcorn();
}