public void Move(Stitch source, float affect)
{
if (affect <= 0.1)
{
return;
}
this.Velocity -= this.Velocity * affect;
affect *= 0.6f;
if (this != source)
{
Vector2 relative = source.Position - this.Position;
this.Velocity += relative * affect;
}
foreach (Stitch stitch in ReferencingStitches)
{
if (stitch != source)
{
stitch.Move(this, affect);
}
}
foreach (Stitch stitch in ReferencedStitches)
{
if (stitch != source)
{
stitch.Move(this, affect);
}
}
}
public Textile(int cols,
int rows,
Vector2 center,
float scale,
float orientation,
Vector3 startColor,
Vector3 endColor,
Vector2 screenSize)
{
Id = nextID++;
columnCount = cols;
rowCount = rows;
Vector2 clothSize = new Vector2(
cols * TextileConstants.LengthPerStitch,
rows * TextileConstants.LengthPerStitch);
Vector2 centerOffset = clothSize / 2;
manipulation = new ManipulationAdapter(clothSize, new BoundingRect(screenSize / 2f, screenSize));
manipulation.Scale = scale;
manipulation.Center = center;
manipulation.Orientation = orientation;
int jointCount = 0;
for (int col = 0; col < cols; col++)
{
for (int row = 0; row < rows; row++)
{
Color color = GetColor(col, row, cols, rows, startColor, endColor);
Stitch stitch = new Stitch(
this,
new Vector2(
(col * TextileConstants.LengthPerStitch) - centerOffset.X,
(row * TextileConstants.LengthPerStitch) - centerOffset.Y),
new Vector2((float)col / cols, (float)row /rows),
color);
if (row > 0)
{
Stitch upperStitch = stitches[stitches.Count - 1];
upperStitch.ReferencedStitches.Add(stitch);
stitch.ReferencingStitches.Add(upperStitch);
jointCount++;
}
if (col > 0)
{
Stitch leftStitch = stitches[stitches.Count - rows];
leftStitch.ReferencedStitches.Add(stitch);
stitch.ReferencingStitches.Add(leftStitch);
jointCount++;
}
stitches.Add(stitch);
}
}
linesVertices = new VertexPositionColor[jointCount * 2];
textureVertices = new VertexPositionTexture[stitches.Count];
RenderStyle = RenderStyles.Wire | RenderStyles.Texture;
Ripple(manipulation.Transform(Vector2.Zero), clothSize.Length() * (float)random.NextDouble(), -0.2f * (float)random.NextDouble());
}
private Vector2 GetRelationalVelocity(Stitch target)
{
Vector2 relativePos = this.Position - target.Position;
float length = relativePos.Length();
if (length < TextileConstants.LengthPerStitch)
{
return Vector2.Zero;
}
if (length > TextileConstants.PullRange)
{
relativePos *= TextileConstants.PullRange / length;
}
Vector2 relativeVelocity = this.Velocity - target.Velocity;
float pull = AverageElementLength(relativePos * relativeVelocity);
float force = WeightingAdd(length - TextileConstants.LengthPerStitch, pull / TextileConstants.LengthPerStitch,
TextileConstants.PullAmplitudeWeight) * TextileConstants.Amplitude;
return length > 0f ? (relativePos * force / length) : Vector2.Zero;
}