protected override void Update(GameTime gameTime)
{
base.Update(gameTime);
Assets.updateTimer.Restart();
#region Process Curtain Simulation
//update point masses
for (i = 0; i < PointMasses.Count; i++)
{
Functions_Simulate.Constrain(PointMasses[i]);
Functions_Simulate.ApplyPhysics(PointMasses[i]);
Functions_Simulate.RelaxPM(PointMasses[i]);
}
#endregion
#region Pass input into curtain
//get this frame of user input
InputData.Update();
//place cursor rec and draw game cursor
MouseState currentMouseState = Mouse.GetState();
cursorRec.X = (int)currentMouseState.X - (int)(cursorRec.Width / 2);
cursorRec.Y = (int)currentMouseState.Y - (int)(cursorRec.Height / 2);
if (InputData.IsLeftMouseBtnPress())
{ //grab one PM colliding with cursor rec
for (i = 0; i < PointMasses.Count; i++)
{ //do not allow input to be passed to pinned point masses
if (PointMasses[i].pinned == false)
{
if (cursorRec.Contains(PointMasses[i].X, PointMasses[i].Y))
{ //grab PM, bail
grabbedPM = PointMasses[i];
grabbedPM.pinned = true;
i = PointMasses.Count;
}
}
}
}
if (currentMouseState.LeftButton == ButtonState.Pressed)
{ //handle dragging state (left mouse button down)
if (grabbedPM != null)
{ //drag the point until released
grabbedPM.X = currentMouseState.X;
grabbedPM.Y = currentMouseState.Y;
}
}
else
{ //release grabbed pm
if (grabbedPM != null)
{
grabbedPM.pinned = false;
grabbedPM = null;
}
}
#endregion
//update how the lines connect to their pointMasses
for (i = 0; i < Lines.Count; i++)
{
Functions_Simulate.UpdateLine(Lines[i]);
}
Assets.updateTimer.Stop();
updateTimeRec.Width = (int)(Assets.updateTimer.ElapsedTicks / 1000 * 8);
}
public Line(PointMass p1, PointMass p2)
{
P1 = p1; P2 = p2;
}
protected override void LoadContent()
{
Assets.graphicsDevice = GraphicsDevice;
Assets.spriteBatch = new SpriteBatch(GraphicsDevice);
Assets.Setup();
PointMasses = new List <PointMass>();
Lines = new List <Line>();
int counter;
#region create the point masses
for (int y = 0; y < Assets.curtainHeight; y++)
{
for (int x = 0; x < Assets.curtainWidth; x++)
{ //spread pms out
PointMass pm = new PointMass(curPos.X + 64 + x * Assets.spacing, curPos.Y + y * Assets.spacing);
if (y == 0)
{
//pm.pinned = true; //pin entire top row
//pin some of top row curtain
if (x == 0 || x == Assets.curtainWidth - 1)
{
pm.pinned = true;
}
if (x % Assets.pinNthTopPointMass == 0)
{
pm.pinned = true;
}
}
PointMasses.Add(pm); //ad pm to game list
}
}
#endregion
#region setup point masses neighbors
counter = 0;
for (int y = 0; y < Assets.curtainHeight; y++)
{
for (int x = 0; x < Assets.curtainWidth; x++)
{
if (x < (Assets.curtainWidth - 1)) //connect left to right point, and vice versa
{ //neighbors ref ////0=up, 1=right, 2=down, 3=left
PointMasses[counter].neighbors[1] = PointMasses[counter + 1];
PointMasses[counter + 1].neighbors[3] = PointMasses[counter];
}
if (y < (Assets.curtainHeight - 1)) //connect top to bottom, and vice versa
{
PointMasses[counter].neighbors[2] = PointMasses[counter + Assets.curtainWidth];
PointMasses[counter + Assets.curtainWidth].neighbors[0] = PointMasses[counter];
}
//track which pm index we are at
counter++;
}
}
#endregion
#region assign point masses to lines
counter = 0;
for (int y = 0; y < Assets.curtainHeight; y++)
{
for (int x = 0; x < Assets.curtainWidth; x++)
{
if (x < (Assets.curtainWidth - 1)) //connect left to right point
{
Lines.Add(new Line(PointMasses[counter], PointMasses[counter + 1]));
}
if (y < (Assets.curtainHeight - 1)) //connect top to bottom
{
Lines.Add(new Line(PointMasses[counter], PointMasses[counter + Assets.curtainWidth]));
}
//track which pm index we are at
counter++;
}
}
#endregion
}
