public void Render(IScreenBuffer screen, PlayerInfo player)
{
screen.Clear();
// The screen has an origin in the top left. Positive Y is DOWN
// Maps have an origin in the bottom left. Positive Y is UP
_camera.ScreenBounds = screen.Dimensions;
_camera.Center = player.Position;
_camera.RotationInRadians = _settings.RotateMode ? player.Angle - MathHelper.PiOver2 : 0;
// Transform all vertices
for (int v = 0; v < _map.Vertices.Length; v++)
{
_verticesInScreenCoords[v] = ToScreenCoords(_map.Vertices[v]);
}
Point ToScreenCoords(Vector2 worldCoordinate)
{
return(_camera.WorldToScreen(worldCoordinate).ToPoint());
}
void DrawLineFromVertices(int v1, int v2, Color c) =>
DrawLineFromScreenCoordinates(_verticesInScreenCoords[v1], _verticesInScreenCoords[v2], c);
void DrawLineFromWorldCoordinates(Vector2 wc1, Vector2 wc2, Color c)
{
var sc1 = ToScreenCoords(wc1);
var sc2 = ToScreenCoords(wc2);
DrawLineFromScreenCoordinates(sc1, sc2, c);
}
void DrawLineFromScreenCoordinates(Point sc1, Point sc2, Color c)
{
var result = LineClipping.ClipToScreen(screen, sc1, sc2);
if (result.shouldDraw)
{
_drawLine(screen, result.p0, result.p1, c);
}
}
void DrawCircle(Vector2 center, float radiusInWorldCoordinates, Color c)
{
screen.PlotCircle(_camera.WorldToScreen(center).ToPoint(), (int)(radiusInWorldCoordinates * _camera.TotalZoom), c);
}
void DrawBox(Vector2 center, float halfWidth, Color c)
{
var topLeft = center + new Vector2(-halfWidth, halfWidth);
var topRight = center + new Vector2(halfWidth, halfWidth);
var bottomLeft = center + new Vector2(-halfWidth, -halfWidth);
var bottomRight = center + new Vector2(halfWidth, -halfWidth);
DrawLineFromWorldCoordinates(topLeft, topRight, c);
DrawLineFromWorldCoordinates(topRight, bottomRight, c);
DrawLineFromWorldCoordinates(bottomRight, bottomLeft, c);
DrawLineFromWorldCoordinates(bottomLeft, topLeft, c);
}
void DrawVertex(Vector2 wc, Color c) => DrawBox(wc, VertexHalfWidth, c);
foreach (var lineDef in _map.Map.LineDefs)
{
ref Vector2 vertex1 = ref _map.Vertices[lineDef.V1];
ref Vector2 vertex2 = ref _map.Vertices[lineDef.V2];
