protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
//Initialize level
Texture2D[,] tiles = new Texture2D[2, 2];
tiles[0, 0] = Content.Load<Texture2D>("t1");
tiles[0, 1] = Content.Load<Texture2D>("t2");
tiles[1, 0] = Content.Load<Texture2D>("t3");
tiles[1, 1] = Content.Load<Texture2D>("t4");
level = new LevelObs(tiles, LoadObstacles());
//Initialize scene
camera = new Camera(Vector2.Zero, new Size(800, 600));
scene = new Scene(this, spriteBatch, level, camera);
Components.Add(scene);
//Temporary sprite shapeset
Polygon shape =
new Polygon(new Vector2[] { new Vector2(5, 38),
new Vector2(24, 38),
new Vector2(26, 48),
new Vector2(1, 48)});
List<Polygon> shapeSet = new List<Xebab.Helpers.Polygons.Polygon>(1);
shapeSet.Add(shape);
//Initialize sprite
Texture2D spritesheet = Content.Load<Texture2D>("guy01");
sprite = new AnimatedSprite(scene.ContentHandler, shapeSet,
spritesheet, new Size(31, 48));
scene.ContentHandler.SpriteHandler.SpawnSprite(sprite);
sprite.Position = new Vector2(300);
sprite.AddBehavior(new CameraFollowerBehavior(sprite, camera, level));
}
private void DrawPolygon(Polygon p, Color color, int thickness = 1)
{
int n = p.Vertexes.Length;
for (int i = 0; i < n; i++)
{
Primitives2D.DrawLine(spriteBatch, p.Vertexes[i] - camera.ViewportPosition,
p.NextVertex(i) - camera.ViewportPosition, color, thickness);
}
}
public bool Hits(Polygon other)
{
//First test myself against other polygon...
for (int i = 0; i < this.VertexCount; i++)
{
Interval otherProjection = other.GetProjection(this.norms[i], this.verts[0]);
if (!this.selfProjections[i].Intersects(otherProjection))
{
//other polygon's projection is not intersecting mine
return false;
}
}
//..then test other polygon against me
for (int i = 0; i < other.VertexCount; i++)
{
Interval thisProjection = this.GetProjection(other.norms[i], other.verts[0]);
if(!other.selfProjections[i].Intersects(thisProjection))
{
//my projection is not intersecting other polygon's one
return false;
}
}
//All projections are respectively intersecting along all axes:
//polygons are overlapping
return true;
}
private void LoadLevel()
{
System.Windows.Forms.OpenFileDialog fileDialog = new System.Windows.Forms.OpenFileDialog();
fileDialog.Filter = "XML Document|*.xml";
fileDialog.Title = "Load level";
fileDialog.ShowDialog();
if (fileDialog.FileName == "") return;
XmlTextReader xmlReader = new XmlTextReader(fileDialog.FileName);
List<Polygon> pols = new List<Polygon>();
xmlReader.Read();
xmlReader.Read();
xmlReader.Read();
while (xmlReader.Name == "Polygon") //Read polygon
{
List<Vector2> vertexes = new List<Vector2>();
xmlReader.Read(); //Read Vertex
while (xmlReader.Name == "Vertex")
{
Vector2 v = new Vector2();
xmlReader.Read(); //Read X
xmlReader.Read();
//v.X = float.Parse(xmlReader.Value, System.Globalization.NumberStyles.);
v.X = (float)Convert.ToDouble(xmlReader.Value, CultureInfo.InvariantCulture.NumberFormat);
xmlReader.Read(); //Read Y
xmlReader.Read();
xmlReader.Read();
v.Y = (float)Convert.ToDouble(xmlReader.Value, CultureInfo.InvariantCulture.NumberFormat);
vertexes.Add(v);
xmlReader.Read();
xmlReader.Read();
xmlReader.Read(); //Read next node
}
//polygon ends here
pols.Add(new Polygon(vertexes.ToArray()));
xmlReader.Read();
}
//EOF
xmlReader.Close();
polys = pols;
activePolygon = null;
camera.SetViewportPosition(Vector2.Zero);
}
private void BuildPolys(Vector2 rCursor, KeyboardState keyb)
{
if (keyb.IsKeyDown(Keys.LeftControl))
{
//did user clicked over a pre-existent polygon?
foreach (Polygon p in polys)
{
if (p.GetBoundingBox().Contains(rCursor.ToPoint()))
{
activePolygon = p;
break;
}
}
}
//are we building a polygon from scratch?
else if (activePolygon == null)
{
activePolygon = new Polygon(new Vector2[1] { rCursor });
}
else if (activePolygon != null)
{
//.. add another vertex to the polygon vertex list...
Vector2[] vertexes = new Vector2[activePolygon.VertexCount + 1];
activePolygon.Vertexes.CopyTo(vertexes, 0);
vertexes[vertexes.Length - 1] = rCursor;
//.. and recreate it
polys.Remove(activePolygon);
activePolygon = Polygon.ConvexHull(vertexes);
polys.Add(activePolygon);
}
}
protected override void Update(GameTime gameTime)
{
KeyboardState keyb = Keyboard.GetState();
MouseState mouse = Mouse.GetState();
cursor = new Vector2(mouse.X, mouse.Y);
// Allows the game to exit
if (keyb.IsKeyDown(Keys.Escape))
this.Exit();
//reset camera position
if (keyb.IsKeyDown(Keys.Space))
camera.SetViewportPosition(Vector2.Zero);
//Handle camera dragging
MoveCamera(mouse);
Vector2 relativeCursor = cursor + camera.ViewportPosition;
//If user clicked the canvas...
if (mouse.LeftButton == ButtonState.Pressed)
{
if ((keyb.IsKeyDown(Keys.LeftShift) || keyb.IsKeyDown(Keys.RightShift))
&& activePolygon != null)
{
// move the entire polygon to mouse cursor
activePolygon.Translate(relativeCursor - activePolygon.GetTopLeftPosition());
}
else
{
BuildPolys(relativeCursor, keyb);
}
}
//If user is inserting poly and clicked enter, finish drawing poly (if it's valid)
if (keyb.IsKeyDown(Keys.Enter) && activePolygon != null
&& activePolygon.VertexCount >= 3)
{
activePolygon = null;
}
//If user has an active poly and presses cancel, remove the selecte polygon
if (keyb.IsKeyDown(Keys.Delete) && activePolygon != null)
{
polys.Remove(activePolygon);
activePolygon = null;
}
if (keyb.IsKeyDown(Keys.Back))
{
activePolygon = null;
}
//Save work when user presses F8
if (keyb.IsKeyDown(Keys.F8))
{
SaveLevel();
}
//Load level when user presses F6
if (keyb.IsKeyDown(Keys.F6))
{
LoadLevel();
}
base.Update(gameTime);
}
