public Wall(Vector2f point1, Vector2f point3, Bitmap WallTexture)
{
this.Point1 = point1;
this.Point3 = point3;
// I worked this out on my notepad, points 1, 2, 3, and 4 are ordered clockwise.
// 1 ----------------- 2
// | |
// 4 ----------------- 3
this.Point2 = new Vector2f(point1.y, point3.x);
this.Point4 = new Vector2f(Point1.x, Point3.y);
this.Barycenter = new Vector2f((point1.x + point3.x) / 2, (point1.y + point3.y) / 2);
this.WallTexture = WallTexture;
}
public float DotProduct(Vector2f inputVector)
{
return x * inputVector.x + y * inputVector.y;
}
public Vertex(Vector3f pos3d, Vector2f pos2d)
{
this.Pos3D = pos3d;
this.Pos2D = pos2d;
}
public Player(Vector2f position, float angle)
{
this.Position = position;
this.Angle = angle;
}
private void pnlDraw_Paint(object sender, PaintEventArgs e)
{
SolidBrush brush = new SolidBrush(Color.FromArgb(50, 50, 50));
Pen pen = new Pen(brush);
Map TransformedMap = new Map();
TransformedMap.Walls = new Wall[map.Walls.Length];
float[] DepthBuffer = new float[map.Walls.Length];
// Draw floor
e.Graphics.FillRectangle(brush, 0, pnlDraw.Height / 2 - 25, pnlDraw.Width, pnlDraw.Height);
for (int i = 0; i < map.Walls.Length; i++)
{
Wall wall = map.Walls[i];
Vector2f Point1Translated = new Vector2f(0, 0);
Vector2f Point3Translated = new Vector2f(0, 0);
// Translate the verticies around the player
Point1Translated.x = wall.Point1.x - player.Position.x;
Point3Translated.x = wall.Point3.x - player.Position.x;
Point1Translated.y = wall.Point1.y - player.Position.y;
Point3Translated.y = wall.Point3.y - player.Position.y;
Wall TranslatedWall = new Wall(Point1Translated, Point3Translated, StoneWall);
Vector2f Point1Rotated = new Vector2f(0, 0);
Vector2f Point3Rotated = new Vector2f(0, 0);
// Rotate the verticies around the player
Point1Rotated.y = (float)(Point1Translated.x * Math.Cos(player.Angle) + Point1Translated.y * Math.Sin(player.Angle));
Point3Rotated.y = (float)(Point3Translated.x * Math.Cos(player.Angle) + Point3Translated.y * Math.Sin(player.Angle));
Point1Rotated.x = (float)(Point1Translated.x * Math.Sin(player.Angle) - Point1Translated.y * Math.Cos(player.Angle));
Point3Rotated.x = (float)(Point3Translated.x * Math.Sin(player.Angle) - Point3Translated.y * Math.Cos(player.Angle));
Wall TransformedWall = new Wall(Point1Rotated, Point3Rotated, StoneWall);
#region Intersect
// Thanks bisqwit!
Intersect(TransformedWall.Point1.x, TransformedWall.Point1.x, TransformedWall.Point3.x, TransformedWall.Point3.y, -0.0001f, 0.0001f, -20f, 1f, true);
Intersect(TransformedWall.Point1.x, TransformedWall.Point1.x, TransformedWall.Point3.x, TransformedWall.Point3.y, 0.0001f, 0.0001f, 20f, 1f, false);
if (TransformedWall.Point1.y == 0)
{
TransformedWall.Point1.y = 1;
}
if (TransformedWall.Point3.y == 0)
{
TransformedWall.Point3.y = 1;
}
if (TransformedWall.Point1.y < 0)
{
if (iz1 > 0)
{
TransformedWall.Point1.x = ix1;
TransformedWall.Point1.y = iz1;
}
else
{
TransformedWall.Point1.x = ix2;
TransformedWall.Point1.y = iz2;
}
}
if (TransformedWall.Point3.y < 0)
{
if (iz1 > 0)
{
TransformedWall.Point3.x = ix1;
TransformedWall.Point3.y = iz1;
}
else
{
TransformedWall.Point3.x = ix2;
TransformedWall.Point3.y = iz2;
}
}
#endregion
TransformedMap.Walls[i] = TransformedWall;
DepthBuffer[i] = TransformedWall.Barycenter.y;
}
TransformedMap.SortWallsbyDepth();
SolidBrush TextBrush = new SolidBrush(Color.FromArgb(250, 250, 250));
for (int i = 0; i < TransformedMap.Walls.Length; i++)
{
Wall TransformedWall = TransformedMap.Walls[i];
float TransformedWallDepth = TransformedWall.Barycenter.y;
int IndexOfWall = Array.IndexOf(DepthBuffer, TransformedWallDepth);
Wall wall = map.Walls[IndexOfWall];
// These are 2D screen coordinates that represent the 3D drawing of the wall in perspective
// Don't look at these nasty prototypey variables. Pay attention to the vectors below.
float XLeft = -TransformedWall.Point1.x * 100 / TransformedWall.Point1.y;
float YTopLeft = -WALL_HEIGHT / TransformedWall.Point1.y;
float YBottomLeft = WALL_HEIGHT / TransformedWall.Point1.y;
float XRight = -TransformedWall.Point3.x * 100 / TransformedWall.Point3.y;
float YTopRight = -WALL_HEIGHT / TransformedWall.Point3.y;
float YBottomRight = WALL_HEIGHT / TransformedWall.Point3.y;
Vector2f TopLeft = new Vector2f(XLeft, YTopLeft);
Vector2f TopRight = new Vector2f(XRight, YTopRight);
Vector2f BottomLeft = new Vector2f(XLeft, YBottomLeft);
Vector2f BottomRight = new Vector2f(XRight, YBottomRight);
bool IsWallNotInScreenBounds = (TopLeft.Add(400).x < 0 && TopLeft.Add(400).x > 800 && BottomRight.Add(400).x < 0 || BottomRight.Add(400).x > 800);
// Only render the wall if it's in the screen.
if (!IsWallNotInScreenBounds)
{
YLScsDrawing.Imaging.Filters.FreeTransform filter = new YLScsDrawing.Imaging.Filters.FreeTransform();
filter.Bitmap = wall.WallTexture;
filter.VertexLeftTop = TopLeft.ToPoint();
filter.VertexTopRight = TopRight.ToPoint();
filter.VertexBottomLeft = BottomLeft.ToPoint();
filter.VertexRightBottom = BottomRight.ToPoint();
// Looks way nicer.
filter.IsBilinearInterpolation = true;
System.Drawing.Bitmap perspectiveImg = filter.Bitmap;
// Draw image on the Y axis of the tallest point on the wall
// This is because, well, trust me, it makes sense.
// http://i.imgur.com/jgp8faz.png this is why.
float LeftLineHeight = BottomLeft.y - TopLeft.y;
float RightLineHeight = BottomRight.y - TopRight.y;
if (RightLineHeight > LeftLineHeight)
{
Vector2f DrawPoint = new Vector2f(TopLeft.x, TopRight.y);
e.Graphics.DrawImage(perspectiveImg, DrawPoint.Add(400).ToPoint());
}
else
{
e.Graphics.DrawImage(perspectiveImg, TopLeft.Add(400).ToPoint());
}
// Lighting calculation
float Barycenter = map.Walls[IndexOfWall].Barycenter.y;
int LightDensity = (int)Math.Abs((Barycenter * 150 % 255 - 100));
if (LightDensity > 255)
{
LightDensity = 255;
}
// Draw a semi-transparent polygon on the wall using an ARGB value
Brush LightingBrush = new SolidBrush(Color.FromArgb(90, LightDensity, LightDensity, LightDensity));
PointF[] PolyPoints = {
TopLeft.Add(400).ToPoint(),
TopRight.Add(400).ToPoint(),
BottomRight.Add(400).ToPoint(),
BottomLeft.Add(400).ToPoint()
};
e.Graphics.FillPolygon(LightingBrush, PolyPoints);
// Ceiling
e.Graphics.DrawLine(pen, TopLeft.Add(400).ToPoint(), TopRight.Add(400).ToPoint());
// Floor
e.Graphics.DrawLine(pen, BottomLeft.Add(400).ToPoint(), BottomRight.Add(400).ToPoint());
// Connect ceiling and floor
e.Graphics.DrawLine(pen, TopLeft.Add(400).ToPoint(),BottomLeft.Add(400).ToPoint());
e.Graphics.DrawLine(pen, TopRight.Add(400).ToPoint(), BottomRight.Add(400).ToPoint());
}
}
// Draw player
// e.Graphics.DrawLine(pen, player.Position.Add(400).ToPoint(), player.Position.Add(400).ToPoint());
// e.Graphics.FillRectangle(new SolidBrush(Color.Red), 100, 100, 2, 2);
}