public void deleteParticle(Particle p)
{
if (p != null)
{
p.Dead = true;
particleField[(int)p.position.X, (int)p.position.Y] = null;
deleteList.Add(p);
}
}
public void moveSwapParticle(Particle p, int newX, int newY)
{
if (p.Dead) return;
if (newX < 0 || newX >= width || newY < 0 || newY >= height)
{
particleField[(int)p.position.X, (int)p.position.Y] = null;
p.Dead = true;
deleteList.Add(p);
return;
}
Particle old = particleField[newX, newY];
old.position = new Vector2(p.position.X, p.position.Y);
particleField[(int)p.position.X, (int)p.position.Y] = old;
particleField[newX, newY] = p;
p.position = new Vector2(newX, newY);
}
/// <summary>
/// Call to change the location of a particle. DO NOT set the position manually
/// </summary>
/// <param name="p"></param>
/// <param name="newX"></param>
/// <param name="newY"></param>
public void moveParticle(Particle p, int newX, int newY)
{
if (p.Dead) return;
particleField[(int)p.position.X, (int)p.position.Y] = null;
if (newX < 0 || newX >= width || newY < 0 || newY >= height)
{
p.Dead = true;
deleteList.Add(p);
return;
}
var prev = particleField[newX, newY];
if (prev != null)
{
prev.Dead = true;
deleteList.Add(prev);
}
particleField[newX, newY] = p;
p.position = new Vector2(newX, newY);
}
private bool isColliding(Particle pOrig, Particle collider)
{
pOrig.velocity = new Vector2(pOrig.velocity.X, 0);
return true;
}
private bool checkCollisions(Particle colP)
{
IEnumerable<Particle> collQuery =
from p in particles
where p.position.X - colP.position.X == 0 && p.position.Y - colP.position.Y == 1// && p.type == Particle_Type.Wall
select p;
foreach (Particle p in collQuery)
{
//if (p.position.Y - colP.position.Y <= 1 && p.position.Y - colP.position.Y >= -1 &&
// p.position.X - colP.position.X <= 1 && p.position.X - colP.position.X >= -1)
{
isColliding(colP, p);
return true;
}
}
return true;
}
public bool newParticle(Particle p)
{
if (!(p.position.X < 0 || p.position.X >= width || p.position.Y < 0 || p.position.Y >= height) && particles.Count < maxParticles)
{
if (particleField[(int)p.position.X, (int)p.position.Y] == null)
{
particleField[(int)p.position.X, (int)p.position.Y] = p;
//particles.Add(p);
addList.Add(p);
}
// addList.Add(p);
return true;
}
return false;
}
private bool surrounded(Particle colP)
{
if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1) != null && particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1) != null &&//beleow
particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y - 1) != null && particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y - 1) != null &&//above
particleStorage.particleAt((int)colP.position.X + 1, (int)colP.position.Y) != null && particleStorage.particleAt((int)colP.position.X + 1, (int)colP.position.Y) != null && //right
particleStorage.particleAt((int)colP.position.X - 1, (int)colP.position.Y) != null && particleStorage.particleAt((int)colP.position.X - 1, (int)colP.position.Y) != null)//left
return true;
else
return false;
}
private bool isColliding(Particle pOrig, Particle collider)
{
//pOrig.velocity.Y = 0;
return true;
}
private bool handleFire(Particle p)
{
Vector2[] positionList = new Vector2[8];
positionList[0] = new Vector2(p.position.X, p.position.Y - 1);//Right above first
positionList[1] = new Vector2(p.position.X -1, p.position.Y - 1);//Then top corners
positionList[2] = new Vector2(p.position.X + 1, p.position.Y - 1);
positionList[3] = new Vector2(p.position.X - 1, p.position.Y);//Left and Right
positionList[4] = new Vector2(p.position.X + 1, p.position.Y - 1);
positionList[5] = new Vector2(p.position.X, p.position.Y + 1);//Right Below
positionList[6] = new Vector2(p.position.X - 1, p.position.Y + 1);//Bottom corners
positionList[7] = new Vector2(p.position.X + 1, p.position.Y + 1);
bool nearParticle = false;
int tempRand = rnd.Next(10);
bool isRemoved = false;
foreach (Vector2 pos in positionList)
if (/*!isRemoved &&*/ particleStorage.particleAt((int)pos.X, (int)pos.Y) != null)
{
nearParticle = true;
Particle other = particleStorage.particleAt((int)pos.X, (int)pos.Y);
//double random = rnd.NextDouble();
if (other.type == Particle_Type.Water)
{
p.velocity = Vector2.Zero;
p.dontMove = true;
particleStorage.deleteParticle(p);
particleStorage.deleteParticle(other);
isRemoved = true;
}
else if (other.type == Particle_Type.Plant)
{
p.velocity = Vector2.Zero;
p.dontMove = true;
if (rnd.Next(10) == 0)//10% chance to delete plant
{
particleStorage.deleteParticle(other);
if (rnd.Next(10) < 9)//90% chance to propagate
addParticle(other.position, Vector2.Zero, Particle_Type.Fire, false, true);
}
}
else if (other.type == Particle_Type.Wall || other.type == Particle_Type.Sand)
{
p.velocity = Vector2.Zero;
p.dontMove = true;
if (rnd.Next(10) == 0)//10% chance to delete wall
{
particleStorage.deleteParticle(other);
if (rnd.Next(4) == 0) //25% chance to propagate
addParticle(other.position, Vector2.Zero, Particle_Type.Fire, false, true);
}
}
}
else
p.dontMove = false;
if (!p.dontMove)
{
if (tempRand == 0 && p.velocity.X != 1)
p.velocity = new Vector2(1, -1);
else if (tempRand == 1 && p.velocity.X != -1)
p.velocity = new Vector2(-1, -1);
else
p.velocity = new Vector2(0, -1);
}
return true;
}
private void checkTurnToPlant(Particle colP)
{
if (colP.type != Particle_Type.Water)
return;
int deleteSize = particleStorage.particleDeleteCount();
if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1) != null)//beleow
{
if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1).type == Particle_Type.Plant && rnd.Next(10) == 0)
{
Vector2 tempPos = colP.position;
particleStorage.deleteParticle(colP);
addParticle(tempPos, new Vector2(0), Particle_Type.Plant, false, true);
}
}
if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y - 1) != null && deleteSize == particleStorage.particleDeleteCount()) //above
{
if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y - 1).type == Particle_Type.Plant && rnd.Next(10) == 0)
{
Vector2 tempPos = colP.position;
particleStorage.deleteParticle(colP);
addParticle(tempPos, new Vector2(0), Particle_Type.Plant, false, true);
}
}
if (particleStorage.particleAt((int)colP.position.X + 1, (int)colP.position.Y) != null && deleteSize == particleStorage.particleDeleteCount()) //right
{
if (particleStorage.particleAt((int)colP.position.X + 1, (int)colP.position.Y).type == Particle_Type.Plant && rnd.Next(6) == 0)
{
Vector2 tempPos = colP.position;
particleStorage.deleteParticle(colP);
addParticle(tempPos, new Vector2(0), Particle_Type.Plant, false, true);
}
}
if (particleStorage.particleAt((int)colP.position.X - 1, (int)colP.position.Y) != null && deleteSize == particleStorage.particleDeleteCount()) //left
{
if (particleStorage.particleAt((int)colP.position.X - 1, (int)colP.position.Y).type == Particle_Type.Plant && rnd.Next(6) == 0)
{
Vector2 tempPos = colP.position;
particleStorage.deleteParticle(colP);
addParticle(tempPos, new Vector2(0), Particle_Type.Plant, false, true);
}
}
}
private bool checkCollisions(Particle colP)
{
// these are used as flags for checking the first dip and checking for a wall which would block a particle
bool checkLeft = false;
bool leftObstacle = false;
bool checkRight = false;
bool rightObstacle = false;
int counter = 1; //used for incrementing where dips are checked
// List<Particle> collList = particleStorage.withinIndexExcludeSource((int)colP.position.X, (int)colP.position.Y);// new List<Particle>();
checkTurnToPlant(colP);
if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1) != null)
{
//if particle is sand, and water is below, switch to cause sand to fall in water
if (colP.type == Particle_Type.Sand && particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1).type == Particle_Type.Water)
{
//BAD, me no likey: colP.position = new Vector2(colP.position.X, colP.position.Y + 1);
particleStorage.moveSwapParticle(colP, (int)colP.position.X, (int)colP.position.Y + 1);
colP.velocity = Vector2.Zero;
}
else
{
colP.velocity = new Vector2(colP.velocity.X, 0);
//future acid particle interaction?
//if (colP.type == Particle_Type.Acid && rnd.Next(2) == 0)
//{
// Vector2 tempPos = particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1).position;
// particleStorage.deleteParticle(particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1));
// addParticle(tempPos, new Vector2(0), Particle_Type.Plant);
//}
//turns water into plant.
if (particleStorage.particleAt((int)colP.position.X - 1, (int)colP.position.Y + 1) != null) //there is a particle to the bottom left
{
if (particleStorage.particleAt((int)colP.position.X + 1, (int)colP.position.Y + 1) == null) //there is no particle to the right
{
colP.velocity = new Vector2(1, 1);
}
//used to make particles behave more liquidlike and less powder like
else if (!surrounded(colP)) //if the particle is surrounded by other particles, it shouldn't check
while ((!checkLeft && !checkRight) && (!rightObstacle || !leftObstacle)) //if the bottom three particle spaces check all exist, loop until we find the first dip UNLESS both end in a wall
{
//if there is an obstacle in line with the particle, it will stop checking that side for a dip
if (particleStorage.particleAt((int)colP.position.X + counter, (int)colP.position.Y) != null)
//if(particleStorage.particleAt((int)colP.position.X + counter, (int)colP.position.Y).type == Particle_Type.Wall) //this drastically slows performance but speeds up liquid behavior
rightObstacle = true;
if (particleStorage.particleAt((int)colP.position.X - counter, (int)colP.position.Y) != null)
//if(particleStorage.particleAt((int)colP.position.X - counter, (int)colP.position.Y).type == Particle_Type.Wall) //this drastically slows performance but speeds up liquid behavior
leftObstacle = true;
if (particleStorage.particleAt((int)colP.position.X + counter, (int)colP.position.Y + 1) == null && !rightObstacle)
{
checkRight = true;
break;
}
if (particleStorage.particleAt((int)colP.position.X - counter, (int)colP.position.Y + 1) == null && !leftObstacle)
{
checkLeft = true;
break;
}
counter++;
}
if (checkRight)
colP.velocity = new Vector2(3, 0);
if (checkLeft)
colP.velocity = new Vector2(-3, 0);
}
else if (particleStorage.particleAt((int)colP.position.X + 1, (int)colP.position.Y + 1) != null) //there is a particle to the right
{
if (particleStorage.particleAt((int)colP.position.X - 1, (int)colP.position.Y + 1) == null) //there is no particle to the left
{
colP.velocity = new Vector2(-1, 1);
}
}
else if (particleStorage.particleAt((int)colP.position.X, (int)colP.position.Y + 1) != null)
//there is a particle directly underneath, but no particles to either side underneath (solves pillar problem)
{
if (rnd.Next(1) == 0)
colP.velocity = new Vector2(1, 1);
else
colP.velocity = new Vector2(-1, 1);
}
}
}
//foreach (Particle p in collList)
//{
// isColliding(colP, p);
// if ((colP.position.Y - 1) - p.position.Y < -epsilon)//colP is above p
// {
// }
//}
return true;
}
