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[csharp] Fix PathConstraint length spacing for zero length bones.

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see https://github.com/EsotericSoftware/spine-runtimes/issues/1023
This commit is contained in:
John 2017-10-19 19:29:26 +08:00 committed by GitHub
parent 292f1a26e3
commit da54111238
1 changed files with 17 additions and 11 deletions
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28
spine-csharp/src/PathConstraint.cs
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@ -33,6 +33,7 @@ using System;
namespace Spine {
public class PathConstraint : IConstraint {
const int NONE = -1, BEFORE = -2, AFTER = -3;
const float Epsilon = 0.00001f;
internal PathConstraintData data;
internal ExposedList<Bone> bones;
@ -93,11 +94,15 @@ namespace Spine {
for (int i = 0, n = spacesCount - 1; i < n;) {
Bone bone = bonesItems[i];
float setupLength = bone.data.length;
if (setupLength == 0) setupLength = 0.000000001f;
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;
if (setupLength < PathConstraint.Epsilon) {
if (scale) lengths.Items[i] = 0;
spaces.Items[++i] = 0;
} 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++)
@ -122,7 +127,7 @@ namespace Spine {
float x = positions[p], y = positions[p + 1], dx = x - boneX, dy = y - boneY;
if (scale) {
float length = lengths.Items[i];
if (length != 0) {
if (length >= PathConstraint.Epsilon) {
float s = ((float)Math.Sqrt(dx * dx + dy * dy) / length - 1) * rotateMix + 1;
bone.a *= s;
bone.c *= s;
@ -134,7 +139,7 @@ namespace Spine {
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] == 0)
else if (spaces.Items[i + 1] < PathConstraint.Epsilon)
r = positions[p + 2];
else
r = MathUtils.Atan2(dy, dx);
@ -230,7 +235,7 @@ namespace Spine {
path.ComputeWorldVertices(target, curve * 6 + 2, 8, world, 0);
}
AddCurvePosition(p, world[0], world[1], world[2], world[3], world[4], world[5], world[6], world[7], output, o,
tangents || (i > 0 && space == 0));
tangents || (i > 0 && space < PathConstraint.Epsilon));
}
return output;
}
@ -378,7 +383,7 @@ namespace Spine {
}
break;
}
AddCurvePosition(p * 0.1f, x1, y1, cx1, cy1, cx2, cy2, x2, y2, output, o, tangents || (i > 0 && space == 0));
AddCurvePosition(p * 0.1f, x1, y1, cx1, cy1, cx2, cy2, x2, y2, output, o, tangents || (i > 0 && space < PathConstraint.Epsilon));
}
return output;
}
@ -399,13 +404,14 @@ namespace Spine {
static void AddCurvePosition (float p, float x1, float y1, float cx1, float cy1, float cx2, float cy2, float x2, float y2,
float[] output, int o, bool tangents) {
if (p == 0 || float.IsNaN(p)) p = 0.0001f;
if (p < PathConstraint.Epsilon || float.IsNaN(p)) p = PathConstraint.Epsilon;
float tt = p * p, ttt = tt * p, u = 1 - p, uu = u * u, uuu = uu * u;
float ut = u * p, ut3 = ut * 3, uut3 = u * ut3, utt3 = ut3 * p;
float x = x1 * uuu + cx1 * uut3 + cx2 * utt3 + x2 * ttt, y = y1 * uuu + cy1 * uut3 + cy2 * utt3 + y2 * ttt;
output[o] = x;
output[o + 1] = y;
if (tangents) output[o + 2] = (float)Math.Atan2(y - (y1 * uu + cy1 * ut * 2 + cy2 * tt), x - (x1 * uu + cx1 * ut * 2 + cx2 * tt));
if (tangents)
output[o + 2] = (float)Math.Atan2(y - (y1 * uu + cy1 * ut * 2 + cy2 * tt), x - (x1 * uu + cx1 * ut * 2 + cx2 * tt));
}
}
}