// Cole Anderson
// 4/22/17
// ETEC-2110
// Assignment 8 - Program 1
// Yost

#include <SDL2/SDL.h>
#include <stdio.h>
//Screen dimension constants
int SCREEN_WIDTH = 800;
int SCREEN_HEIGHT = 600;

struct BLOCKHEAD_NODE
{
float x,y; // position
float dx,dy; // movement component
long color;
int size;
struct BLOCKHEAD_NODE * next;
};


void renderBlockHead(struct BLOCKHEAD_NODE * blockhead, SDL_Renderer *renderer)
{

 //   if (SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_LEFT)) {
          //  Uint32 SDL_GetMouseState(int* x,int* y);
         // printf("%f %f %i", blockhead->x, blockhead->y, blockhead->size);
            SDL_Rect fillRect = { (int)blockhead->x, (int)blockhead->y, 10, 10};

            SDL_SetRenderDrawColor( renderer, 0, blockhead->color,  0, 0);
            SDL_RenderFillRect( renderer, &fillRect );
      //      }

//this function should draw the blockhead according that is appropriate for the structure elements.
}
void moveBlockHead(struct BLOCKHEAD_NODE * blockhead, float elapsed)
{
//this function should use the displacement vector to move the blockhead to a new position..
//Be sure to handle bouncing off of the window borders.
    //bottom case:
    if((int)blockhead->y+blockhead->size>=SCREEN_HEIGHT && blockhead->dy>=0){blockhead->dy*=-1;printf("bounce\n");} // bottom border - done
    if((int)blockhead->x+blockhead->size>=SCREEN_WIDTH && blockhead->dx<=800){blockhead->dx*=-1;printf("bounce\n");} // right border - done
    if((int)blockhead->y-blockhead->size>=SCREEN_HEIGHT && blockhead->dy>=600){blockhead->dy*=-1;printf("bounce\n");} // top border
  //  if((int)blockhead->x-blockhead->size>=SCREEN_WIDTH && blockhead->dx<=0){blockhead->dx*=-1;printf("bounce\n");} // left border
    blockhead->x += blockhead->dx*elapsed;
    blockhead->y += blockhead->dy*elapsed;
}