public override Attachment Copy()
{
PathAttachment copy = new PathAttachment(this.Name);
CopyTo(copy);
copy.lengths = new float[lengths.Length];
Array.Copy(lengths, 0, copy.lengths, 0, lengths.Length);
copy.closed = closed;
copy.constantSpeed = constantSpeed;
return(copy);
}
float[] ComputeWorldPositions(PathAttachment path, int spacesCount, bool tangents, bool percentPosition,
bool percentSpacing)
{
Slot target = this.target;
float position = this.position;
float[] spacesItems = this.spaces.Items, output = this.positions.Resize(spacesCount * 3 + 2).Items, world;
bool closed = path.Closed;
int verticesLength = path.WorldVerticesLength, curveCount = verticesLength / 6, prevCurve = NONE;
float pathLength = 0;
if (!path.ConstantSpeed)
{
float[] lengths = path.Lengths;
curveCount -= closed ? 1 : 2;
pathLength = lengths[curveCount];
if (percentPosition)
{
position *= pathLength;
}
if (percentSpacing)
{
for (int i = 1; i < spacesCount; i++)
{
spacesItems[i] *= pathLength;
}
}
world = this.world.Resize(8).Items;
for (int i = 0, o = 0, curve = 0; i < spacesCount; i++, o += 3)
{
float space = spacesItems[i];
position += space;
float p = position;
if (closed)
{
p %= pathLength;
if (p < 0)
{
p += pathLength;
}
curve = 0;
}
else if (p < 0)
{
if (prevCurve != BEFORE)
{
prevCurve = BEFORE;
path.ComputeWorldVertices(target, 2, 4, world, 0, 2);
}
AddBeforePosition(p, world, 0, output, o);
continue;
}
else if (p > pathLength)
{
if (prevCurve != AFTER)
{
prevCurve = AFTER;
path.ComputeWorldVertices(target, verticesLength - 6, 4, world, 0, 2);
}
AddAfterPosition(p - pathLength, world, 0, output, o);
continue;
}
// Determine curve containing position.
for (;; curve++)
{
float length = lengths[curve];
if (p > length)
{
continue;
}
if (curve == 0)
{
p /= length;
}
else
{
float prev = lengths[curve - 1];
p = (p - prev) / (length - prev);
}
break;
}
if (curve != prevCurve)
{
prevCurve = curve;
if (closed && curve == curveCount)
{
path.ComputeWorldVertices(target, verticesLength - 4, 4, world, 0, 2);
path.ComputeWorldVertices(target, 0, 4, world, 4, 2);
}
else
{
path.ComputeWorldVertices(target, curve * 6 + 2, 8, world, 0, 2);
}
}
AddCurvePosition(p, world[0], world[1], world[2], world[3], world[4], world[5], world[6], world[7], output, o,
tangents || (i > 0 && space < PathConstraint.Epsilon));
}
return(output);
}
// World vertices.
if (closed)
{
verticesLength += 2;
world = this.world.Resize(verticesLength).Items;
path.ComputeWorldVertices(target, 2, verticesLength - 4, world, 0, 2);
path.ComputeWorldVertices(target, 0, 2, world, verticesLength - 4, 2);
world[verticesLength - 2] = world[0];
world[verticesLength - 1] = world[1];
}
else
{
curveCount--;
verticesLength -= 4;
world = this.world.Resize(verticesLength).Items;
path.ComputeWorldVertices(target, 2, verticesLength, world, 0, 2);
}
// Curve lengths.
float[] curves = this.curves.Resize(curveCount).Items;
pathLength = 0;
float x1 = world[0], y1 = world[1], cx1 = 0, cy1 = 0, cx2 = 0, cy2 = 0, x2 = 0, y2 = 0;
float tmpx, tmpy, dddfx, dddfy, ddfx, ddfy, dfx, dfy;
for (int i = 0, w = 2; i < curveCount; i++, w += 6)
{
cx1 = world[w];
cy1 = world[w + 1];
cx2 = world[w + 2];
cy2 = world[w + 3];
x2 = world[w + 4];
y2 = world[w + 5];
tmpx = (x1 - cx1 * 2 + cx2) * 0.1875f;
tmpy = (y1 - cy1 * 2 + cy2) * 0.1875f;
dddfx = ((cx1 - cx2) * 3 - x1 + x2) * 0.09375f;
dddfy = ((cy1 - cy2) * 3 - y1 + y2) * 0.09375f;
ddfx = tmpx * 2 + dddfx;
ddfy = tmpy * 2 + dddfy;
dfx = (cx1 - x1) * 0.75f + tmpx + dddfx * 0.16666667f;
dfy = (cy1 - y1) * 0.75f + tmpy + dddfy * 0.16666667f;
pathLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
dfx += ddfx;
dfy += ddfy;
ddfx += dddfx;
ddfy += dddfy;
pathLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
dfx += ddfx;
dfy += ddfy;
pathLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
dfx += ddfx + dddfx;
dfy += ddfy + dddfy;
pathLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
curves[i] = pathLength;
x1 = x2;
y1 = y2;
}
if (percentPosition)
{
position *= pathLength;
}
else
{
position *= pathLength / path.lengths[curveCount - 1];
}
if (percentSpacing)
{
for (int i = 1; i < spacesCount; i++)
{
spacesItems[i] *= pathLength;
}
}
float[] segments = this.segments;
float curveLength = 0;
for (int i = 0, o = 0, curve = 0, segment = 0; i < spacesCount; i++, o += 3)
{
float space = spacesItems[i];
position += space;
float p = position;
if (closed)
{
p %= pathLength;
if (p < 0)
{
p += pathLength;
}
curve = 0;
}
else if (p < 0)
{
AddBeforePosition(p, world, 0, output, o);
continue;
}
else if (p > pathLength)
{
AddAfterPosition(p - pathLength, world, verticesLength - 4, output, o);
continue;
}
// Determine curve containing position.
for (;; curve++)
{
float length = curves[curve];
if (p > length)
{
continue;
}
if (curve == 0)
{
p /= length;
}
else
{
float prev = curves[curve - 1];
p = (p - prev) / (length - prev);
}
break;
}
// Curve segment lengths.
if (curve != prevCurve)
{
prevCurve = curve;
int ii = curve * 6;
x1 = world[ii];
y1 = world[ii + 1];
cx1 = world[ii + 2];
cy1 = world[ii + 3];
cx2 = world[ii + 4];
cy2 = world[ii + 5];
x2 = world[ii + 6];
y2 = world[ii + 7];
tmpx = (x1 - cx1 * 2 + cx2) * 0.03f;
tmpy = (y1 - cy1 * 2 + cy2) * 0.03f;
dddfx = ((cx1 - cx2) * 3 - x1 + x2) * 0.006f;
dddfy = ((cy1 - cy2) * 3 - y1 + y2) * 0.006f;
ddfx = tmpx * 2 + dddfx;
ddfy = tmpy * 2 + dddfy;
dfx = (cx1 - x1) * 0.3f + tmpx + dddfx * 0.16666667f;
dfy = (cy1 - y1) * 0.3f + tmpy + dddfy * 0.16666667f;
curveLength = (float)Math.Sqrt(dfx * dfx + dfy * dfy);
segments[0] = curveLength;
for (ii = 1; ii < 8; ii++)
{
dfx += ddfx;
dfy += ddfy;
ddfx += dddfx;
ddfy += dddfy;
curveLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
segments[ii] = curveLength;
}
dfx += ddfx;
dfy += ddfy;
curveLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
segments[8] = curveLength;
dfx += ddfx + dddfx;
dfy += ddfy + dddfy;
curveLength += (float)Math.Sqrt(dfx * dfx + dfy * dfy);
segments[9] = curveLength;
segment = 0;
}
// Weight by segment length.
p *= curveLength;
for (;; segment++)
{
float length = segments[segment];
if (p > length)
{
continue;
}
if (segment == 0)
{
p /= length;
}
else
{
float prev = segments[segment - 1];
p = segment + (p - prev) / (length - prev);
}
break;
}
AddCurvePosition(p * 0.1f, x1, y1, cx1, cy1, cx2, cy2, x2, y2, output, o, tangents || (i > 0 && space < PathConstraint.Epsilon));
}
return(output);
}
public void Update()
{
PathAttachment attachment = target.Attachment as PathAttachment;
if (attachment == null)
{
return;
}
float rotateMix = this.rotateMix, translateMix = this.translateMix;
bool translate = translateMix > 0, rotate = rotateMix > 0;
if (!translate && !rotate)
{
return;
}
PathConstraintData data = this.data;
bool percentSpacing = data.spacingMode == SpacingMode.Percent;
RotateMode rotateMode = data.rotateMode;
bool tangents = rotateMode == RotateMode.Tangent, scale = rotateMode == RotateMode.ChainScale;
int boneCount = this.bones.Count, spacesCount = tangents ? boneCount : boneCount + 1;
Bone[] bonesItems = this.bones.Items;
ExposedList <float> spaces = this.spaces.Resize(spacesCount), lengths = null;
float spacing = this.spacing;
if (scale || !percentSpacing)
{
if (scale)
{
lengths = this.lengths.Resize(boneCount);
}
bool lengthSpacing = data.spacingMode == SpacingMode.Length;
for (int i = 0, n = spacesCount - 1; i < n;)
{
Bone bone = bonesItems[i];
float setupLength = bone.data.length;
if (setupLength < PathConstraint.Epsilon)
{
if (scale)
{
lengths.Items[i] = 0;
}
spaces.Items[++i] = 0;
}
else if (percentSpacing)
{
if (scale)
{
float x = setupLength * bone.a, y = setupLength * bone.c;
float length = (float)Math.Sqrt(x * x + y * y);
lengths.Items[i] = length;
}
spaces.Items[++i] = spacing;
}
else
{
float x = setupLength * bone.a, y = setupLength * bone.c;
float length = (float)Math.Sqrt(x * x + y * y);
if (scale)
{
lengths.Items[i] = length;
}
spaces.Items[++i] = (lengthSpacing ? setupLength + spacing : spacing) * length / setupLength;
}
}
}
else
{
for (int i = 1; i < spacesCount; i++)
{
spaces.Items[i] = spacing;
}
}
float[] positions = ComputeWorldPositions(attachment, spacesCount, tangents,
data.positionMode == PositionMode.Percent, percentSpacing);
float boneX = positions[0], boneY = positions[1], offsetRotation = data.offsetRotation;
bool tip;
if (offsetRotation == 0)
{
tip = rotateMode == RotateMode.Chain;
}
else
{
tip = false;
Bone p = target.bone;
offsetRotation *= p.a * p.d - p.b * p.c > 0 ? MathUtils.DegRad : -MathUtils.DegRad;
}
for (int i = 0, p = 3; i < boneCount; i++, p += 3)
{
Bone bone = bonesItems[i];
bone.worldX += (boneX - bone.worldX) * translateMix;
bone.worldY += (boneY - bone.worldY) * translateMix;
float x = positions[p], y = positions[p + 1], dx = x - boneX, dy = y - boneY;
if (scale)
{
float length = lengths.Items[i];
if (length >= PathConstraint.Epsilon)
{
float s = ((float)Math.Sqrt(dx * dx + dy * dy) / length - 1) * rotateMix + 1;
bone.a *= s;
bone.c *= s;
}
}
boneX = x;
boneY = y;
if (rotate)
{
float a = bone.a, b = bone.b, c = bone.c, d = bone.d, r, cos, sin;
if (tangents)
{
r = positions[p - 1];
}
else if (spaces.Items[i + 1] < PathConstraint.Epsilon)
{
r = positions[p + 2];
}
else
{
r = MathUtils.Atan2(dy, dx);
}
r -= MathUtils.Atan2(c, a);
if (tip)
{
cos = MathUtils.Cos(r);
sin = MathUtils.Sin(r);
float length = bone.data.length;
boneX += (length * (cos * a - sin * c) - dx) * rotateMix;
boneY += (length * (sin * a + cos * c) - dy) * rotateMix;
}
else
{
r += offsetRotation;
}
if (r > MathUtils.PI)
{
r -= MathUtils.PI2;
}
else if (r < -MathUtils.PI) //
{
r += MathUtils.PI2;
}
r *= rotateMix;
cos = MathUtils.Cos(r);
sin = MathUtils.Sin(r);
bone.a = cos * a - sin * c;
bone.b = cos * b - sin * d;
bone.c = sin * a + cos * c;
bone.d = sin * b + cos * d;
}
bone.appliedValid = false;
}
}