private bool changeColor = false; // toogle for color colisions
// BallList constructor
public BallList(Transform parent, float inputBoxSize, int numBalls, bool varyRadii, bool changeColor)
{
gameObj.name = "BallList"; // name the empty game object
gameObj.transform.parent = parent; // set as child
boxSize = inputBoxSize; // get box size
this.changeColor = changeColor; // turn on color collisions
AddBalls(numBalls, varyRadii);
//AddBall_Test();
// Make spatial grid
// Calculate cell size such that the box will contain an integer number of cells, each
// at least twice the diameter of a ball, if possible
float cellSize;
int numCellsInBoxSize = Mathf.FloorToInt(boxSize / (ballRadius * 2 * 2)); // number of cells that in boxsize
int numCells = 8 * (numCellsInBoxSize * numCellsInBoxSize * numCellsInBoxSize); // total number of cells in box
if (numCellsInBoxSize < 1) // if the size of a cell is larger than boxsize,
{
cellSize = 2 * boxSize; // make the box one big cell
numCells = 1;
}
else
{
cellSize = boxSize / numCellsInBoxSize;
}
List <Vector3> positions = balls.Select(o => o.position).ToList(); // make a list of the ball positions
grid = new Grid3D <Ball> (cellSize, numCells); // create the grid
grid.Fill(positions, balls, ballRadius); // populate the grid
}
public void Fill_OnlyTouchesCube()
{
var width = 100;
var height = 50;
var depth = 24;
var grid = new Grid3D <int>(width, height, depth, 33);
int minX = 5, minY = 10, minZ = 8;
int maxX = width - 5, maxY = height - 10, maxZ = depth - 8;
grid.Fill(1, minX, minY, minZ, maxX, maxY, maxZ);
for (var x = 0; x < grid.Width; x++)
{
for (var y = 0; y < grid.Height; y++)
{
for (var z = 0; z < grid.Depth; z++)
{
// outside cube
if (x < minX || x > maxX ||
y < minY || y > maxY ||
z < minZ || z > maxZ)
{
Assert.AreEqual(33, grid[x, y, z], "({0},{1},{2})", x, y, z);
}
else
{
Assert.AreEqual(1, grid[x, y, z], "({0},{1},{2})", x, y, z);
}
}
}
}
}
// Integrate the motion of the balls, including collision detection and resolution
public void IntegrateMotion(float timeStep)
{
CheckCollisions_Grid(timeStep);
foreach (Ball ball in balls)
{
ball.CheckBoundary(boxSize);
ball.MoveBall(timeStep);
ball.Fade();
}
// Update grid
grid.Empty();
List <Vector3> positions = balls.Select(o => o.position).ToList(); // make a list of the ball positions
grid.Fill(positions, balls, ballRadius);
}