public void AdvanceFrame()
{
// Move all things by one step, accounting for gravity
for (int thingIndex = 0; thingIndex < this.things.Count; thingIndex++)
{
Thing thing = this.things[thingIndex];
thing.Center.Offset(thing.XVelocity, thing.YVelocity);
thing.YVelocity += this.gravity * this.sceneRect.Height; // 중력
thing.YVelocity *= this.airFriction;
thing.XVelocity *= this.airFriction;
thing.Theta += thing.SpinRate;
// 바닥으로 떨어지는것 방지
if (thing.Center.Y > thing.GetFirstY())
{
thing.Center.Y = thing.GetFirstY();
}
// bounce off walls
if ((thing.Center.X - thing.Size < 0) || (thing.Center.X + thing.Size > this.sceneRect.Width))
{
thing.XVelocity = -thing.XVelocity;
thing.Center.X += thing.XVelocity;
}
// Then get rid of one if any that fall off the bottom
if (thing.Center.Y - thing.Size > this.sceneRect.Bottom)
{
thing.State = ThingState.Remove;
}
// Get rid of after dissolving.
if (thing.State == ThingState.Dissolving)
{
thing.Dissolve += 1 / (this.targetFrameRate * DissolveTime);
thing.Size *= this.expandingRate;
if (thing.Dissolve >= 0.1)
{
thing.State = ThingState.Remove;
MainWindow.ImageSave("Snap_" + thing.GetFirstX() + "_" + thing.GetFirstY());
}
}
this.things[thingIndex] = thing;
}
// Then remove any that should go away now
for (int i = 0; i < this.things.Count; i++)
{
Thing thing = this.things[i];
if (thing.State == ThingState.Remove)
{
this.things.Remove(thing);
i--;
}
}
// Create any new things to drop based on dropRate
if ((this.things.Count < this.maxThings) && (this.rnd.NextDouble() < this.dropRate / this.targetFrameRate) && (this.polyTypes != PolyType.None))
{
PolyType[] alltypes =
{
PolyType.Triangle, PolyType.Square, PolyType.Star, PolyType.Pentagon,
PolyType.Hex, PolyType.Star7, PolyType.Circle, PolyType.Bubble
};
byte r;
byte g;
byte b;
if (this.doRandomColors)
{
r = (byte)(this.rnd.Next(215) + 40);
g = (byte)(this.rnd.Next(215) + 40);
b = (byte)(this.rnd.Next(215) + 40);
}
else
{
r = (byte)Math.Min(255.0, this.baseColor.R * (0.7 + (this.rnd.NextDouble() * 0.7)));
g = (byte)Math.Min(255.0, this.baseColor.G * (0.7 + (this.rnd.NextDouble() * 0.7)));
b = (byte)Math.Min(255.0, this.baseColor.B * (0.7 + (this.rnd.NextDouble() * 0.7)));
}
PolyType tryType;
do
{
tryType = alltypes[this.rnd.Next(alltypes.Length)];
}while ((this.polyTypes & tryType) == 0);
// this.DropNewThing(tryType, this.shapeSize, System.Windows.Media.Color.FromRgb(r, g, b));
}
}
