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/* FILE NAME: VG4SAMPL.C
 * PROGRAMMER: VG4
 * DATE: 02.06.2011
 * PURPOSE: Simple animation.
 *          Animation system core.
 *
 * Автор: Виталий Галинский.
 * Дата:  02.06.2011
 * Летняя учебно-исследовательская практика ФМЛ № 30, 2011 год.
 * Группа компьютерной графики.
 * Copyright © 2011
 *   Computer Graphics Support Group of 30 Phys-Math Lyceum
 * © 2011 Физико-математический лицей № 30, Санкт-Петербург.
 */
 
#include <stdio.h>
#include <math.h>
 
#include "vg4anim.h"

/* User font */
static HFONT hFnt;
 
/* User pen */
static HPEN hPen;
 
static VOID Init( vg4ANIM *Ani )
{
  hFnt = CreateFont(111, 0, 50, 0, FW_BOLD,
    TRUE, FALSE, FALSE, RUSSIAN_CHARSET,
    OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
    PROOF_QUALITY, VARIABLE_PITCH | FF_ROMAN,
    "Times");
 
  hPen = CreatePen(PS_SOLID, 8, RGB(0, 0, 255));
 
} /* End of 'Init' function */
 
static VOID Close( vg4ANIM *Ani )
{
  DeleteObject(hFnt);
} /* End of 'Close' function */
 
static VOID Response( vg4ANIM *Ani )
{
  if (Ani->Keys[VK_SPACE])
    VG4_SetPause(TRUE);
  if (Ani->Keys['A'])
    VG4_SetPause(FALSE);
  if (Ani->Keys[VK_ESCAPE])
    VG4_DoExit();
} /* End of 'Close' function */
 
static VOID Render( vg4ANIM *Ani )
{
  INT R = 300, x, y;
  static CHAR Buf[100];
 
  Rectangle(Ani->hDC, 10, 10, 100, 100);
 
  SelectObject(Ani->hDC, hFnt);
  SetTextColor(Ani->hDC, RGB(255, 0, 0));
  SetBkMode(Ani->hDC, TRANSPARENT);
  TextOut(Ani->hDC, 0, 0, Buf, sprintf(Buf, "FPS: %.3f", Ani->FPS));
 
  SelectObject(Ani->hDC, hPen);
  MoveToEx(Ani->hDC,
    Ani->W / 2 + 25 * sin(5 * Ani->Time),
    Ani->H / 2 + 25 * sin(2 * 5 * Ani->Time),
    NULL);
  LineTo(Ani->hDC,
    Ani->W / 2 + R * sin(0.15 * Ani->Time),
    Ani->H / 2 + R * cos(0.15 * Ani->Time));
 
  MoveToEx(Ani->hDC,
    Ani->W / 2,
    Ani->H / 2,
    NULL);
  LineTo(Ani->hDC,
    Ani->MX,
    Ani->MY);
 
  SelectObject(Ani->hDC, GetStockObject(NULL_PEN));
  SetDCBrushColor(Ani->hDC, RGB(55, 155, 255));
  x = Ani->W / 2 + Ani->W / 2.4 * sin(2 * Ani->Time);
  y = Ani->H - 10 - fabs(300 * sin(5 * Ani->Time));
  Ellipse(Ani->hDC, x - 10, y - 10, x + 11, y + 11);
} /* End of 'Render' function */
 
/* Set user animation function */
VOID SetMyAnim( VOID )
{
  VG4_SetCallbacks(Init, Close, Response, Render);
} /*End of 'SetMyAnim' function */
 
/* END OF 'VG4SAMPL.C' FILE */