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
var screenDimensionsV = screen.Dimensions.ToVector2();
var desiredMapScreenBounds = screenDimensionsV * DefaultMapToScreenRatio;
var gameToScreenFactor = Math.Min(desiredMapScreenBounds.X / _map.Area.X, desiredMapScreenBounds.Y / _map.Area.Y);
var screenAreaInMapCoords = screenDimensionsV / gameToScreenFactor;
var mapCenteringOffset = (screenAreaInMapCoords - _map.Area) / 2 - _map.BottomLeftCorner;
// Transform all vertices
for (int v = 0; v < _map.Vertices.Length; v++)
{
_verticesInScreenCoords[v] = ToScreenCoords(_map.Vertices[v]);
}
Point ToScreenCoords(Vector2 worldCoordinate)
{
var shiftedWorldCoordinate = worldCoordinate + mapCenteringOffset;
// This fixes jittering
var pixelOffset = new Vector2(0.5f, 0.5f);
return(((shiftedWorldCoordinate * gameToScreenFactor) + pixelOffset).ToPoint().InvertY(screen.Height));
}
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)
{
screen.PlotLineSmooth(result.p0, result.p1, c);
}
}
foreach (var lineDef in _map.Map.LineDefs.Take((int)_linesToDraw))
{
ref Vector2 vertex1 = ref _map.Vertices[lineDef.V1];
ref Vector2 vertex2 = ref _map.Vertices[lineDef.V2];
public void Render(IScreenBuffer screen, PlayerInfo player)
{
screen.Clear();
Interpreter.Settings = player.CameraSettings;
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);
}
}
foreach (SectorInfo sector in _map.Sectors)
{
foreach (Line line in sector.Lines)
{
Vector3 cameraPosition = new Vector3(player.Position, player.VerticalPosition + player.ViewHeight);
_camera.Center = cameraPosition;
_camera.RotationInRadians = player.Angle - MathHelper.PiOver2;
Vector3 topLeftConverted = _camera.WorldToPerspective(new Vector3(line.Vertex1.X, line.Vertex1.Y, sector.Info.HeightCeiling));
Vector3 topRightConverted = _camera.WorldToPerspective(new Vector3(line.Vertex2.X, line.Vertex2.Y, sector.Info.HeightCeiling));
Vector3 bottomLeftConverted = _camera.WorldToPerspective(new Vector3(line.Vertex1.X, line.Vertex1.Y, sector.Info.HeightFloor));
Vector3 bottomRightConverted = _camera.WorldToPerspective(new Vector3(line.Vertex2.X, line.Vertex2.Y, sector.Info.HeightFloor));
var topLineResult = Interpreter.ConvertWorldLineToScreenPoints(screen, topLeftConverted, topRightConverted);
if (topLineResult.shouldDraw)
{
DrawLineFromScreenCoordinates(topLineResult.p1, topLineResult.p2, Color.Red);
}
var bottomLineResult = Interpreter.ConvertWorldLineToScreenPoints(screen, bottomLeftConverted, bottomRightConverted);
if (bottomLineResult.shouldDraw)
{
DrawLineFromScreenCoordinates(bottomLineResult.p1, bottomLineResult.p2, Color.Red);
}
var leftLineResult = Interpreter.ConvertWorldLineToScreenPoints(screen, topLeftConverted, bottomLeftConverted);
if (leftLineResult.shouldDraw)
{
DrawLineFromScreenCoordinates(leftLineResult.p1, leftLineResult.p2, Color.Red);
}
var rightLineResult = Interpreter.ConvertWorldLineToScreenPoints(screen, topRightConverted, bottomRightConverted);
if (rightLineResult.shouldDraw)
{
DrawLineFromScreenCoordinates(rightLineResult.p1, rightLineResult.p2, Color.Red);
}
}
}
}
public void SimpleClipping()
{
for (int i = 0; i < NumberOfPoints - 1; i++)
{
var sc1 = _points[i];
var sc2 = _points[i + 1];
if (LineClipping.CouldAppearOnScreen(_buffer, sc1, sc2))
{
_buffer.PlotLineSmooth(sc1, sc2, Color.Red);
}
}
}
public void CohenSutherlandClipping()
{
for (int i = 0; i < NumberOfPoints - 1; i++)
{
var sc1 = _points[i];
var sc2 = _points[i + 1];
var result = LineClipping.ClipToScreen(_buffer, sc1, sc2);
if (result.shouldDraw)
{
_buffer.PlotLineSmooth(result.p0, result.p1, Color.Red);
}
}
}
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];
