//Assuming you are not already colliding with a tile
private void CollideWithWalls(GameTime gameTime, PlayState map)
{
if (Velocity.X > 0)
{
//Find the set of tiles that our movement will intersect with
Rectanglef movementBox = new Rectanglef(Position.X + Visual.Width, Position.Y, Velocity.X * (float)gameTime.ElapsedGameTime.TotalSeconds, Visual.Height);
int minX = (int)Math.Floor(movementBox.X);
int maxX = (int)Math.Floor(movementBox.X + movementBox.Width);
int minY = (int)Math.Floor(movementBox.Y);
int maxY = (int)Math.Floor(movementBox.Y + movementBox.Height);
//Itterate through every tile that we will cross through and see if one of them is solid
for (int x = minX; x <= maxX; x++)
{
for (int y = minY; y <= maxY; y++)
{
if (map.TileIsSolid(x, y))
{
SetVelocityX(0);
SetPositionX((float)x - Visual.Width - 0.001f);
maxX = -999999;
break;
}
}
}
}
else if (Velocity.X < 0)
{
//Find the set of tiles that our movement will intersect with
Rectanglef movementBox = new Rectanglef(Position.X + (Velocity.X * (float)gameTime.ElapsedGameTime.TotalSeconds), Position.Y, -Velocity.X * (float)gameTime.ElapsedGameTime.TotalSeconds, Visual.Height);
int maxX = (int)Math.Floor(movementBox.X);
int minX = (int)Math.Floor(movementBox.X + movementBox.Width);
int minY = (int)Math.Floor(movementBox.Y);
int maxY = (int)Math.Floor(movementBox.Y + movementBox.Height);
//Itterate through every tile that we will cross through and see if one of them is solid
for (int x = maxX; x >= minX; x--)
{
for (int y = minY; y <= maxY; y++)
{
if (map.TileIsSolid(x, y))
{
SetVelocityX(0);
SetPositionX(x + 1.001f);
minX = 999999;
break;
}
}
}
}
if (Velocity.Y > 0)
{
//Find the set of tiles that our movement will intersect with
Rectanglef movementBox = new Rectanglef(Position.X, Position.Y + Visual.Height, Visual.Width, Velocity.Y * (float)gameTime.ElapsedGameTime.TotalSeconds);
int minX = (int)Math.Floor(movementBox.X);
int maxX = (int)Math.Floor(movementBox.X + movementBox.Width);
int minY = (int)Math.Floor(movementBox.Y);
int maxY = (int)Math.Floor(movementBox.Y + movementBox.Height);
//Itterate through every tile that we will cross through and see if one of them is solid
for (int y = minY; y <= maxY; y++)
{
for (int x = minX; x <= maxX; x++)
{
if (map.TileIsSolid(x, y))
{
SetVelocityY(0);
SetPositionY((float)y - Visual.Height - 0.001f);
maxY = -999999;
break;
}
}
}
}
else if (Velocity.Y < 0)
{
//Find the set of tiles that our movement will intersect with
Rectanglef movementBox = new Rectanglef(Position.X, Position.Y + (Velocity.Y * (float)gameTime.ElapsedGameTime.TotalSeconds), Visual.Width, -Velocity.Y * (float)gameTime.ElapsedGameTime.TotalSeconds);
int minX = (int)Math.Floor(movementBox.X);
int maxX = (int)Math.Floor(movementBox.X + movementBox.Width);
int minY = (int)Math.Floor(movementBox.Y);
int maxY = (int)Math.Floor(movementBox.Y + movementBox.Height);
//Itterate through every tile that we will cross through and see if one of them is solid
for (int y = maxY; y >= minY; y--)
{
for (int x = minX; x <= maxX; x++)
{
if (map.TileIsSolid(x, y))
{
SetVelocityY(0);
SetPositionY(y + 1.001f);
//get us out of these loops
minY = 999999;
break;
}
}
}
}
}