/*

PolyCSG 001
-----------

. Basic render framework up and running

PolyCSG 002
-----------

  . Added Image class
  . Converted buffer to Image class

> First draft of polygon class

  . Polygon edge rendering (scanline based)
  . Not yet tested

PolyCSG 003
-----------

  . Solid rendering

  . Added scanline class
  . Use scanline class for polygon rendering
  . Moved classes to seperate cpp & h files

  . Pass polygon into buffer to render

PolyCSG 004
-----------

  . Removed Poly.render - have to use Image.drawPolygon
  . Added first CSG option - XOR
  . XORPoly.render used to render

PolyCSG 005
-----------

  . Get poly subclass rendering working ( Image.drawPolygon )
  . Add ANDPoly class
  . Polygon intersection (AND) up and running!

PolyCSG 006
-----------

  . Fix in ANDPoly class ( oka && okb -> oka || okb )
  . Added SUBPoly
  . Added ORPoly

PolyCSG 007
-----------

  2002/08/26 01:00 (while smackdown was on after playing cards at the house - Steve won)

  . Added getVScanline function to all polys
  . Added or,and,sub class declarations to main file
  . Renamed Image.drawPolygon to Image.fillPolygon
  . Renamed Image.drawScanline to Image.fillScanline + made private
  . Added Image.drawPolygon, Image.drawScanline, Image.drawVScanline
  . Removed Poly.render (use Image.fillPolygon instead)

  NOW SUPPORTS RENDERING FILLED AND UNFILLED POLYS

PolyCSG 008
-----------

  ~ Antialiased poly functions
  . Added Image.blendCol
  . Initial AA tests.. need edge gradients stored in scanline points

  . RotatePoly class added
  . Poly.firstPoint, nextPoint & peekPoint added

  POLYGON ROTATION WORKING

  . Added pixel text functions to Image

PolyCSG 009
-----------

  . Added TranslatePoly class
  . Fixed memory leak in Redraw() - was not deleting all Poly's

  > Interesting poly shapes

TODOs
-----

  . Poly.recalc function instead of re-making tree each time
    - starts off manual (must be called from main code)
    - change to automatic (use frame counter to avoid re-recalc-ing)
  . TranslatePoly class
  . Predefined polygon classes
    . Regular
    . Star
    . Cog
  . Demo showing different effects

*/



#include <windows.h>
#include <mmsystem.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>



//--- CONSTANTS --------------------------------------------------------------//

//- Settings

#define FULL_WINDOW_DRAG
#define ROUND_IMAGE_SIZE



//---- CLASS DECLARATIONS ----------------------------------------------------//

class Image;
class Scanline;
class Poly;

class XORPoly;
class ANDPoly;
class ORPoly;
class SUBPoly;

class TranslatePoly;
class RotatePoly;

class RegularPoly;
//class StarPoly;

#include "Image.h"
#include "Scanline.h"
#include "Poly.h"

#include "Polygon Boolean Ops\XORPoly.h"
#include "Polygon Boolean Ops\ANDPoly.h"
#include "Polygon Boolean Ops\ORPoly.h"
#include "Polygon Boolean Ops\SUBPoly.h"

#include "Polygon Geometric Ops\TranslatePoly.h"
#include "Polygon Geometric Ops\RotatePoly.h"

#include "Polygon Shapes\RegularPoly.h"
//#include "Polygon Shapes\StarPoly.h"



//--- DATA -------------------------------------------------------------------//

//---- Windows data

HINSTANCE hMainInstance;
HWND hMainWindow = NULL;

char szAppName[40] = "PolyCSG 001";

int mouse_x = 0, mouse_y = 0;
int mouse_xstart = 0, mouse_ystart = 0;

bool mouse_drag = false;

float rx=0, ry=0, rrx=0, rry=0;



//---- Image buffer data

int width = 480;
int height = 360;

Image *im;



//---- Display ---------------------------------------------------------------//

void Display(HDC dc, int *buf, int w, int h)
{
  BITMAPINFO bmi;

  bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
  bmi.bmiHeader.biWidth = w;
  bmi.bmiHeader.biHeight = -h;
  bmi.bmiHeader.biPlanes = 1;
  bmi.bmiHeader.biBitCount = 32;
  bmi.bmiHeader.biCompression = BI_RGB;
  bmi.bmiHeader.biSizeImage = 0;
  bmi.bmiHeader.biXPelsPerMeter = 1000;
  bmi.bmiHeader.biYPelsPerMeter = 1000;
  bmi.bmiHeader.biClrUsed = 0;
  bmi.bmiHeader.biClrImportant = 0;

  StretchDIBits(
    dc,
    0, 0, w, h,
    0, 0, w, h,
    (LPVOID)buf,
    (LPBITMAPINFO)&bmi,
    DIB_RGB_COLORS, SRCCOPY
  );

}



//---- Startup ---------------------------------------------------------------//

void Startup()
{
  //- Allocate image

  #ifdef ROUND_IMAGE_SIZE

  width = (width+7) & -8;
  height = (height+7) & -8;

  #endif

  im = new Image( width, height );
}




//---- Shutdown --------------------------------------------------------------//

void Shutdown()
{
}



//---- Redraw ----------------------------------------------------------------//

void Redraw(HDC dc)
{
  im->clear( 0x000000 );

//  im->checks();

  //- Display

  int i, j;

  float f = timeGetTime() * 0.001f;

  //  Create polys

  Poly *pa1 = (Poly *) new RegularPoly( 230, 180, 90, 5, f*0.065 );
  Poly *pa2 = (Poly *) new RegularPoly( 230, 180, 50, 7, f*0.091 );

  Poly *pa = (Poly *) new SUBPoly( pa1, pa2 );

  Poly *pb1 = (Poly *) new RegularPoly( 250, 180, 90, 3, f*0.039 );
  Poly *pb2 = (Poly *) new RegularPoly( 250, 180, 70, 4, f*0.072 );
  
  Poly *pb = (Poly *) new ORPoly( pb1, pb2 );

  Poly *xp = (Poly *) new XORPoly( pa, pb );
  Poly *ap = (Poly *) new ANDPoly( pa, pb );
  Poly *op = (Poly *) new ORPoly ( pa, pb );
  Poly *sp = (Poly *) new SUBPoly( pa, pb );

  im->fillPolygon( pa, 0x336699 );
  im->fillPolygon( pb, 0x224466 );

  im->fillPolygon( ap, 0xFF9900 );
//  im->drawPolygon( (Poly*)ap, 0xFFFFFF );

  delete xp;
  delete ap;
  delete op;
  delete sp;

  delete pa;
  delete pa1;
  delete pa2;

  delete pb;
  delete pb1;
  delete pb2;

  //  Frame rate indicator

  static int frame = 0;
  frame ++;

  for(j=0; j<8; j++) for(i=0; i<8; i++)
  {
    im->buf[j*width+i] = ((-(((i+j+frame)>>2)&1)) ^ 0xFFFF00 );
  }

  char s[32];
  sprintf( s, "%d", frame );
  im->drawText( 9, 1, s, 0xFFFFFF );

  //- Display

  Display(dc, im->buf, width, height);
}



//---- WinProc ---------------------------------------------------------------//

LRESULT CALLBACK WinProc(HWND hwnd, UINT uiMsg, UINT wParam, LONG lParam)
{
  HDC dc;
  PAINTSTRUCT ps;

  switch(uiMsg) {

  case WM_CREATE:
    Startup();
    SetTimer(hwnd, 1, 10, NULL);
    break;

  case WM_TIMER:
    dc = GetDC(hwnd);
    Redraw(dc);
    ReleaseDC(hwnd, dc);
    return 0L;

  case WM_PAINT:
    dc = BeginPaint(hwnd, &ps);
    Redraw(dc);
    EndPaint(hwnd, &ps);
    return 0L;

  case WM_LBUTTONDOWN:
    mouse_xstart = HIWORD(lParam);
    mouse_ystart = LOWORD(lParam);
    mouse_drag = true;
    SetCapture(hwnd);
    return 0L;

  case WM_MOUSEMOVE:
    mouse_x = HIWORD(lParam);
    mouse_y = LOWORD(lParam);

    if(mouse_drag)
    {
      ry -= (mouse_y-mouse_ystart) * 0.004;
      rx += (mouse_x-mouse_xstart) * 0.004;
      mouse_xstart = mouse_x;
      mouse_ystart = mouse_y;
    }
    return 0L;

  case WM_LBUTTONUP:
    mouse_drag = false;
    ReleaseCapture();
    return 0L;

  #ifdef FULL_WINDOW_DRAG

  case WM_NCHITTEST:
    return HTCAPTION;

  #endif

  case WM_KEYDOWN:
    if( wParam == VK_ESCAPE ) DestroyWindow( hwnd );
    return 0L;

  case WM_DESTROY:
	  Shutdown();
    KillTimer(hwnd, 1);
    PostQuitMessage(0);
    return 0L;

  }

  return DefWindowProc(hwnd, uiMsg, wParam, lParam);
}




//---- WinMain ---------------------------------------------------------------//

int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
  WNDCLASS wndclass;
  char cSwitch;
  MSG msg;
  RECT rc;

  hMainInstance = hInstance;

  if(hPrevInstance) return 1;

  //- Create window class

  wndclass.style         = CS_HREDRAW | CS_VREDRAW;
  wndclass.lpfnWndProc   = WinProc;
  wndclass.cbClsExtra    = 0;
  wndclass.cbWndExtra    = 0;
  wndclass.hInstance     = hInstance;
  wndclass.hIcon         = NULL;
  wndclass.hCursor       = LoadCursor(NULL, IDC_ARROW);
  wndclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
  wndclass.lpszMenuName  = NULL;
  wndclass.lpszClassName = szAppName;

  if(!RegisterClass(&wndclass)) return 1;

  //- Create main window

  GetWindowRect(GetDesktopWindow(), &rc);

  hMainWindow = CreateWindowEx(
    0,
    szAppName,
    szAppName,
    WS_POPUP,
    (rc.right-width)/2,
    (rc.bottom-height)/2,
    width,
    height,
    NULL,
    NULL,
    hInstance,
    NULL
  );

  if(!hMainWindow) return 1;

  ShowWindow(hMainWindow, SW_SHOW);

  //- Message loop

  while(TRUE) {
    while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
      if (msg.message == WM_QUIT) return TRUE;
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
    HDC dc = GetDC(hMainWindow);
    Redraw(dc);
    ReleaseDC(hMainWindow, dc);
  }

  return 0;
}



//---- END OF FILE -----------------------------------------------------------//