/// <summary>
/// Detects the Entity Collision
/// Returns 0 if no Collision
/// </summary>
protected int CollisionDetection(Vector2f vEntityPosition, uint uLength, uint uHeight)
{
Vector2f vEntityPos = vEntityPosition - MainMap.GetTileMapPosition();
vEntityPositionBottomLeft.Y = vEntityPos.Y + uHeight;
vEntityPositionTopRight.X = vEntityPos.X + uLength;
int iTileNearY = (int)vEntityPos.Y / 50;
int iTileNearX = (int)vEntityPos.X / 50;
if (iTileNearY < 0)
{
iTileNearY++;
}
if (iTileNearX < 0)
{
iTileNearX++;
}
for (int y = iTileNearY; y < iTileNearY + 2; y++)
{
for (int x = iTileNearX; x < iTileNearX + 2; x++)
{
// COLLISIONDETECTION ON ENTITY BORDER
if (TileArrayCreation.CollisionReturner(x, y))
{
if (((vEntityPos.Y < (y + 1) * 50 && vEntityPos.Y > y * 50 - 1) ||
(vEntityPos.Y < y * 50 && vEntityPos.Y > (y - 1) * 50)))
{
if (vEntityPos.X <= (x + 1) * 50 && vEntityPos.X >= x * 50)
{
return(1);
}
else if (vEntityPositionTopRight.X >= x * 50 && vEntityPositionTopRight.X <= (x + 1) * 50)
{
return(2);
}
}
if (((vEntityPos.X < (x + 1) * 50 && vEntityPos.X > x * 50 - 1) ||
(vEntityPositionTopRight.X > x * 50 && vEntityPositionTopRight.X < (x + 1) * 50)))
{
if (vEntityPos.Y <= (y + 1) * 50 && vEntityPos.Y >= y * 50)
{
return(3);
}
else if (vEntityPositionBottomLeft.Y >= y * 50 && vEntityPositionBottomLeft.Y <= (y + 1) * 50)
{
return(4);
}
}
}
}
}
return(0);
}
/// <summary>
/// Returns a bool for specified x and y coordinates. If those coordinates are unused, a false is returned.
/// </summary>
/// <param name="xCoord"></param>
/// <param name="yCoord"></param>
/// <returns></returns>
public bool GetCollisionAt(int xCoord, int yCoord)
{
return(TileArrayCreation.CollisionReturner(xCoord, yCoord));
}
/// <summary>
/// Updates possible directions of movement based on Collisiondetection and relocates Entity if Borders were crossed
/// </summary>
/// <param name="vEntityPosition">Position to be checked Collision with Tiles</param>
/// <param name="up">Disallows Character's up Movement</param>
/// <param name="down">Disallows Character's down Movement</param>
/// <param name="right">Disallows Character's right Movement</param>
/// <param name="left">Disallows Character's left Movement</param>
/// <param name="SizeX">Width of the Character</param>
/// <param name="SizeY">Height of the Character</param>
protected void CollisionDetection(ref Vector2f vEntityPosition, ref bool up, ref bool down, ref bool right, ref bool left, float SizeX, float SizeY)
{
float Size;
if (SizeX >= SizeY)
{
Size = SizeX;
}
else
{
Size = SizeY;
}
vEntityPositionBottomLeft.Y = vEntityPosition.Y + Size;
vEntityPositionTopRight.X = vEntityPosition.X + Size;
PlayerTileCollision = false;
int iTileNearY = (int)vEntityPosition.Y / 50 - 1;
int iTileNearX = (int)vEntityPosition.X / 50 - 1;
if (iTileNearY < 0)
{
iTileNearY++;
}
if (iTileNearX < 0)
{
iTileNearX++;
}
for (int y = iTileNearY; y < iTileNearY + 3; y++)
{
for (int x = iTileNearX; x < iTileNearX + 3; x++)
{
//COLLISIONDETECTION ON CHARACTERSPRITE BORDER
if (TileArrayCreation.CollisionReturner(x, y))
{
if (((vEntityPosition.Y < (y + 1) * 50 && vEntityPosition.Y > y * 50 - 1) ||
(vEntityPosition.Y < y * 50 && vEntityPosition.Y > (y - 1) * 50)))
{
if (vEntityPosition.X <= (x + 1) * 50 && vEntityPosition.X >= x * 50)
{
left = true;
vChracterPositionSpace.X = (x + 1) * 50;
PlayerTileCollision = true;
}
else if (vEntityPositionTopRight.X >= x * 50 && vEntityPositionTopRight.X <= (x + 1) * 50)
{
right = true;
vChracterPositionSpace.X = (x - 1) * 50;
PlayerTileCollision = true;
}
}
if (((vEntityPosition.X < (x + 1) * 50 && vEntityPosition.X > x * 50 - 1) ||
(vEntityPositionTopRight.X > x * 50 && vEntityPositionTopRight.X < (x + 1) * 50)))
{
if (vEntityPosition.Y <= (y + 1) * 50 && vEntityPosition.Y >= y * 50)
{
up = true;
vChracterPositionSpace.Y = (y + 1) * 50;
PlayerTileCollision = true;
}
else if (vEntityPositionBottomLeft.Y >= y * 50 && vEntityPositionBottomLeft.Y <= (y + 1) * 50)
{
down = true;
vChracterPositionSpace.Y = (y - 1) * 50;
PlayerTileCollision = true;
}
}
}
//REPLACEMENT OF PLAYERLOCATION IN CASE OF CROSSING BORDER OF OBJECT
if (PlayerTileCollision)
{
if (up && right)
{
if (vEntityPosition.X - vChracterPositionSpace.X < vChracterPositionSpace.Y - vEntityPosition.Y)
{
vEntityPosition.X = vChracterPositionSpace.X;
}
else
{
vEntityPosition.Y = vChracterPositionSpace.Y;
}
break;
}
if (up && left)
{
if (vChracterPositionSpace.X - vEntityPosition.X < vChracterPositionSpace.Y - vEntityPosition.Y)
{
vEntityPosition.X = vChracterPositionSpace.X;
}
else
{
vEntityPosition.Y = vChracterPositionSpace.Y;
}
break;
}
if (down && left)
{
if (vChracterPositionSpace.X - vEntityPosition.X < vEntityPosition.Y - vChracterPositionSpace.Y)
{
vEntityPosition.X = vChracterPositionSpace.X;
}
else
{
vEntityPosition.Y = vChracterPositionSpace.Y;
}
break;
}
if (down && right)
{
if (vEntityPosition.X - vChracterPositionSpace.X < vEntityPosition.Y - vChracterPositionSpace.Y)
{
vEntityPosition.X = vChracterPositionSpace.X;
}
else
{
vEntityPosition.Y = vChracterPositionSpace.Y;
}
break;
}
}
}
}
}