public void InitVals()
{
_nStepSize = 20;
_nAngle = -90;
_nAngleStep = 90;
_fPenDown = true;
_nInput = 0;
SetColor(0x0);
var rect = new NativeMethods.WinRect();
NativeMethods.GetClientRect(_hwnd, ref rect);
_position = new Point((rect.Right - rect.Left) / 2,
(rect.Bottom - rect.Top) / 2);
}
void DrawPoint(int ptindx, IntPtr hclr)
{
Point point = _pts[ptindx];
var rect = new NativeMethods.WinRect(
(int)point.X,
(int)point.Y,
(int)(point.X + 3),
(int)(point.Y + 3)
);
NativeMethods.FillRect(_hdc, ref rect, hclr);
//if (point.X != 0 && point.Y != 0)
//{
// NativeMethods.SelectObject(_hdc, hclr);
// NativeMethods.MoveToEx(_hdc, (int)point.X, (int)point.Y, ref _prevPos);
// var nxt = GetNextIndex(_ptIndex);
// var nextPoint = _pts[nxt];
// NativeMethods.LineTo(_hdc, (int)nextPoint.X, (int)nextPoint.Y);
//}
}
void InitCachedImagesOfAnimals()
{
if (_hdcCached != IntPtr.Zero)
{
NativeMethods.DeleteDC(_hdcCached);
}
_hdcCached = NativeMethods.CreateCompatibleDC(_hdc);
var hBitmap = NativeMethods.CreateCompatibleBitmap(_hdc,
nTotRows * CellWidth,
nTotCols * CellHeight);
NativeMethods.SelectObject(_hdcCached, hBitmap);
IntPtr br;
var rect = new NativeMethods.WinRect();
for (int i = 0; i < 255; i++) // for each age
{
rect.Left = i * _CellWidth;
rect.Right = rect.Left + _CellWidth;
rect.Top = 0;
rect.Bottom = _CellHeight;
br = NativeMethods.CreateSolidBrush(new IntPtr(0xff00 - i * 0x100));
NativeMethods.FillRect(_hdcCached, ref rect, br);
NativeMethods.DeleteObject(br);
br = NativeMethods.CreateSolidBrush(new IntPtr(0xff - i));
rect.Top = _CellHeight;
rect.Bottom = rect.Top + _CellHeight;
NativeMethods.FillRect(_hdcCached, ref rect, br);
NativeMethods.DeleteObject(br);
}
// now draw an empty cell
rect.Top += _CellHeight;
rect.Bottom = rect.Top + _CellHeight;
rect.Left = 0;
rect.Right = _CellWidth;
br = NativeMethods.CreateSolidBrush(new IntPtr(0xffffff));
NativeMethods.FillRect(_hdcCached, ref rect, br);
NativeMethods.DeleteObject(br);
NativeMethods.DeleteObject(hBitmap);
}
public void Draw()
{
if (_fShowTurtle)
{
IntPtr hdc = NativeMethods.GetDC(_hwnd);
NativeMethods.SelectObject(hdc, _colorTurtle);
var cosT = Math.Cos((90 + _nAngle) * piOver180); // cos(Theta)
var sinT = Math.Sin((90 + _nAngle) * piOver180); // sin(Theta)
NativeMethods.SetROP2(hdc, NativeMethods.RasterOps.R2_NOTXORPEN);
NativeMethods.MoveToEx(hdc, (int)_position.X, (int)_position.Y, ref _prevPos);
for (int i = 0; i < _turtle.Length / 2; i++)
{
var x1 = _nTurtleSize * _turtle[i, 0];
var y1 = _nTurtleSize * _turtle[i, 1];
NativeMethods.LineTo(
hdc,
(int)(_position.X + x1 * cosT + y1 * sinT),
(int)(_position.Y + x1 * sinT - y1 * cosT)
);
}
// now the other half of the turtle
NativeMethods.MoveToEx(hdc, (int)_position.X, (int)_position.Y, ref _prevPos);
for (int i = 0; i < _turtle.Length / 2; i++)
{
var x1 = -_nTurtleSize * _turtle[i, 0];
var y1 = -_nTurtleSize * _turtle[i, 1];
NativeMethods.LineTo(
hdc,
(int)(_position.X + x1 * cosT - y1 * sinT),
(int)(_position.Y + x1 * sinT + y1 * cosT)
);
}
var rect = new NativeMethods.WinRect();
NativeMethods.GetClientRect(_hwnd, ref rect);
NativeMethods.ValidateRect(_hwnd, ref rect);
NativeMethods.SetROP2(hdc, NativeMethods.RasterOps.R2_COPYPEN);
NativeMethods.ReleaseDC(_hwnd, hdc);
}
}