private void PaintView()
{
if (_initializing)
{
return;
}
Graphics g = Graphics.FromImage(_image);
g.FillRectangle(_brushBackground, 0, 0, _image.Width, _image.Height);
g.SmoothingMode = SmoothingMode.AntiAlias;
// Get control width and height.
int width = Width;
int height = Height;
// Determine smallest dimension. Use that as the edge length of the square grid.
width = height = Math.Min(width, height);
// Pixel size is calculated using integer division to produce cleaner lines when drawing.
// The inherent rounding down may produce a grid 1 pixel smaller then the determined edge length.
// Also make room for a button above the grid (next test case button).
int visualFieldPixelSize = (height - GridTop) / _world.GridSize;
width = height = visualFieldPixelSize * _world.GridSize;
// Paint pixel outline grid.
// Vertical lines.
int xg = GridLeft;
for (int i = 0; i <= _world.GridSize; i++, xg += visualFieldPixelSize)
{
g.DrawLine(__penGrey, xg, GridTop, xg, GridTop + height);
}
// Horizontal lines.
int yg = GridTop;
for (int i = 0; i <= _world.GridSize; i++, yg += visualFieldPixelSize)
{
g.DrawLine(__penGrey, GridLeft, yg, GridLeft + width, yg);
}
// Paint grid squares. Background color.
Brush sensorBrush = _world.IsPreyCaptured() ? _brushBackgroundSensorCaptured : _brushBackgroundSensor;
yg = GridTop;
for (int y = 0; y < _world.GridSize; y++, yg += visualFieldPixelSize)
{
xg = GridLeft;
for (int x = 0; x < _world.GridSize; x++, xg += visualFieldPixelSize)
{
// Calc distance of sqaure from agent.
if (IntPoint.CalculateDistance(_world.AgentPosition, x, y) <= _world.SensorRange)
{
g.FillRectangle(sensorBrush, xg + 1, yg + 1, visualFieldPixelSize - 2, visualFieldPixelSize - 2);
}
}
}
// Paint agent and prey squares.
IntPoint a = _world.AgentPosition;
IntPoint p = _world.PreyPosition;
g.FillRectangle(_brushAgent, GridLeft + (a._x * visualFieldPixelSize) + 1, GridTop + (a._y * visualFieldPixelSize) + 1, visualFieldPixelSize - 2, visualFieldPixelSize - 2);
g.FillRectangle(_brushPrey, GridLeft + (p._x * visualFieldPixelSize) + 1, GridTop + (p._y * visualFieldPixelSize) + 1, visualFieldPixelSize - 2, visualFieldPixelSize - 2);
Refresh();
}