/
Bone.cs
361 lines (322 loc) · 13.9 KB
/
Bone.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated May 1, 2019. Replaces all prior versions.
*
* Copyright (c) 2013-2019, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software
* or otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS
* INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
using System;
namespace Spine {
/// <summary>
/// Stores a bone's current pose.
/// <para>
/// A bone has a local transform which is used to compute its world transform. A bone also has an applied transform, which is a
/// local transform that can be applied to compute the world transform. The local transform and applied transform may differ if a
/// constraint or application code modifies the world transform after it was computed from the local transform.
/// </para>
/// </summary>
public class Bone : IUpdatable {
static public bool yDown;
internal BoneData data;
internal Skeleton skeleton;
internal Bone parent;
internal ExposedList<Bone> children = new ExposedList<Bone>();
internal float x, y, rotation, scaleX, scaleY, shearX, shearY;
internal float ax, ay, arotation, ascaleX, ascaleY, ashearX, ashearY;
internal bool appliedValid;
internal float a, b, worldX;
internal float c, d, worldY;
internal bool sorted;
public BoneData Data { get { return data; } }
public Skeleton Skeleton { get { return skeleton; } }
public Bone Parent { get { return parent; } }
public ExposedList<Bone> Children { get { return children; } }
/// <summary>The local X translation.</summary>
public float X { get { return x; } set { x = value; } }
/// <summary>The local Y translation.</summary>
public float Y { get { return y; } set { y = value; } }
/// <summary>The local rotation.</summary>
public float Rotation { get { return rotation; } set { rotation = value; } }
/// <summary>The local scaleX.</summary>
public float ScaleX { get { return scaleX; } set { scaleX = value; } }
/// <summary>The local scaleY.</summary>
public float ScaleY { get { return scaleY; } set { scaleY = value; } }
/// <summary>The local shearX.</summary>
public float ShearX { get { return shearX; } set { shearX = value; } }
/// <summary>The local shearY.</summary>
public float ShearY { get { return shearY; } set { shearY = value; } }
/// <summary>The rotation, as calculated by any constraints.</summary>
public float AppliedRotation { get { return arotation; } set { arotation = value; } }
/// <summary>The applied local x translation.</summary>
public float AX { get { return ax; } set { ax = value; } }
/// <summary>The applied local y translation.</summary>
public float AY { get { return ay; } set { ay = value; } }
/// <summary>The applied local scaleX.</summary>
public float AScaleX { get { return ascaleX; } set { ascaleX = value; } }
/// <summary>The applied local scaleY.</summary>
public float AScaleY { get { return ascaleY; } set { ascaleY = value; } }
/// <summary>The applied local shearX.</summary>
public float AShearX { get { return ashearX; } set { ashearX = value; } }
/// <summary>The applied local shearY.</summary>
public float AShearY { get { return ashearY; } set { ashearY = value; } }
public float A { get { return a; } }
public float B { get { return b; } }
public float C { get { return c; } }
public float D { get { return d; } }
public float WorldX { get { return worldX; } }
public float WorldY { get { return worldY; } }
public float WorldRotationX { get { return MathUtils.Atan2(c, a) * MathUtils.RadDeg; } }
public float WorldRotationY { get { return MathUtils.Atan2(d, b) * MathUtils.RadDeg; } }
/// <summary>Returns the magnitide (always positive) of the world scale X.</summary>
public float WorldScaleX { get { return (float)Math.Sqrt(a * a + c * c); } }
/// <summary>Returns the magnitide (always positive) of the world scale Y.</summary>
public float WorldScaleY { get { return (float)Math.Sqrt(b * b + d * d); } }
/// <param name="parent">May be null.</param>
public Bone (BoneData data, Skeleton skeleton, Bone parent) {
if (data == null) throw new ArgumentNullException("data", "data cannot be null.");
if (skeleton == null) throw new ArgumentNullException("skeleton", "skeleton cannot be null.");
this.data = data;
this.skeleton = skeleton;
this.parent = parent;
SetToSetupPose();
}
/// <summary>Same as <see cref="UpdateWorldTransform"/>. This method exists for Bone to implement <see cref="Spine.IUpdatable"/>.</summary>
public void Update () {
UpdateWorldTransform(x, y, rotation, scaleX, scaleY, shearX, shearY);
}
/// <summary>Computes the world transform using the parent bone and this bone's local transform.</summary>
public void UpdateWorldTransform () {
UpdateWorldTransform(x, y, rotation, scaleX, scaleY, shearX, shearY);
}
/// <summary>Computes the world transform using the parent bone and the specified local transform.</summary>
public void UpdateWorldTransform (float x, float y, float rotation, float scaleX, float scaleY, float shearX, float shearY) {
ax = x;
ay = y;
arotation = rotation;
ascaleX = scaleX;
ascaleY = scaleY;
ashearX = shearX;
ashearY = shearY;
appliedValid = true;
Skeleton skeleton = this.skeleton;
Bone parent = this.parent;
if (parent == null) { // Root bone.
float rotationY = rotation + 90 + shearY, sx = skeleton.scaleX, sy = skeleton.scaleY;
a = MathUtils.CosDeg(rotation + shearX) * scaleX * sx;
b = MathUtils.CosDeg(rotationY) * scaleY * sx;
c = MathUtils.SinDeg(rotation + shearX) * scaleX * sy;
d = MathUtils.SinDeg(rotationY) * scaleY * sy;
worldX = x * sx + skeleton.x;
worldY = y * sy + skeleton.y;
return;
}
float pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d;
worldX = pa * x + pb * y + parent.worldX;
worldY = pc * x + pd * y + parent.worldY;
switch (data.transformMode) {
case TransformMode.Normal: {
float rotationY = rotation + 90 + shearY;
float la = MathUtils.CosDeg(rotation + shearX) * scaleX;
float lb = MathUtils.CosDeg(rotationY) * scaleY;
float lc = MathUtils.SinDeg(rotation + shearX) * scaleX;
float ld = MathUtils.SinDeg(rotationY) * scaleY;
a = pa * la + pb * lc;
b = pa * lb + pb * ld;
c = pc * la + pd * lc;
d = pc * lb + pd * ld;
return;
}
case TransformMode.OnlyTranslation: {
float rotationY = rotation + 90 + shearY;
a = MathUtils.CosDeg(rotation + shearX) * scaleX;
b = MathUtils.CosDeg(rotationY) * scaleY;
c = MathUtils.SinDeg(rotation + shearX) * scaleX;
d = MathUtils.SinDeg(rotationY) * scaleY;
break;
}
case TransformMode.NoRotationOrReflection: {
float s = pa * pa + pc * pc, prx;
if (s > 0.0001f) {
s = Math.Abs(pa * pd - pb * pc) / s;
pb = pc * s;
pd = pa * s;
prx = MathUtils.Atan2(pc, pa) * MathUtils.RadDeg;
} else {
pa = 0;
pc = 0;
prx = 90 - MathUtils.Atan2(pd, pb) * MathUtils.RadDeg;
}
float rx = rotation + shearX - prx;
float ry = rotation + shearY - prx + 90;
float la = MathUtils.CosDeg(rx) * scaleX;
float lb = MathUtils.CosDeg(ry) * scaleY;
float lc = MathUtils.SinDeg(rx) * scaleX;
float ld = MathUtils.SinDeg(ry) * scaleY;
a = pa * la - pb * lc;
b = pa * lb - pb * ld;
c = pc * la + pd * lc;
d = pc * lb + pd * ld;
break;
}
case TransformMode.NoScale:
case TransformMode.NoScaleOrReflection: {
float cos = MathUtils.CosDeg(rotation), sin = MathUtils.SinDeg(rotation);
float za = (pa * cos + pb * sin) / skeleton.scaleX;
float zc = (pc * cos + pd * sin) / skeleton.scaleY;
float s = (float)Math.Sqrt(za * za + zc * zc);
if (s > 0.00001f) s = 1 / s;
za *= s;
zc *= s;
s = (float)Math.Sqrt(za * za + zc * zc);
if (data.transformMode == TransformMode.NoScale
&& (pa * pd - pb * pc < 0) != (skeleton.scaleX < 0 != skeleton.scaleY < 0)) s = -s;
float r = MathUtils.PI / 2 + MathUtils.Atan2(zc, za);
float zb = MathUtils.Cos(r) * s;
float zd = MathUtils.Sin(r) * s;
float la = MathUtils.CosDeg(shearX) * scaleX;
float lb = MathUtils.CosDeg(90 + shearY) * scaleY;
float lc = MathUtils.SinDeg(shearX) * scaleX;
float ld = MathUtils.SinDeg(90 + shearY) * scaleY;
a = za * la + zb * lc;
b = za * lb + zb * ld;
c = zc * la + zd * lc;
d = zc * lb + zd * ld;
break;
}
}
a *= skeleton.scaleX;
b *= skeleton.scaleX;
c *= skeleton.scaleY;
d *= skeleton.scaleY;
}
public void SetToSetupPose () {
BoneData data = this.data;
x = data.x;
y = data.y;
rotation = data.rotation;
scaleX = data.scaleX;
scaleY = data.scaleY;
shearX = data.shearX;
shearY = data.shearY;
}
/// <summary>
/// Computes the individual applied transform values from the world transform. This can be useful to perform processing using
/// the applied transform after the world transform has been modified directly (eg, by a constraint)..
///
/// Some information is ambiguous in the world transform, such as -1,-1 scale versus 180 rotation.
/// </summary>
internal void UpdateAppliedTransform () {
appliedValid = true;
Bone parent = this.parent;
if (parent == null) {
ax = worldX;
ay = worldY;
arotation = MathUtils.Atan2(c, a) * MathUtils.RadDeg;
ascaleX = (float)Math.Sqrt(a * a + c * c);
ascaleY = (float)Math.Sqrt(b * b + d * d);
ashearX = 0;
ashearY = MathUtils.Atan2(a * b + c * d, a * d - b * c) * MathUtils.RadDeg;
return;
}
float pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d;
float pid = 1 / (pa * pd - pb * pc);
float dx = worldX - parent.worldX, dy = worldY - parent.worldY;
ax = (dx * pd * pid - dy * pb * pid);
ay = (dy * pa * pid - dx * pc * pid);
float ia = pid * pd;
float id = pid * pa;
float ib = pid * pb;
float ic = pid * pc;
float ra = ia * a - ib * c;
float rb = ia * b - ib * d;
float rc = id * c - ic * a;
float rd = id * d - ic * b;
ashearX = 0;
ascaleX = (float)Math.Sqrt(ra * ra + rc * rc);
if (ascaleX > 0.0001f) {
float det = ra * rd - rb * rc;
ascaleY = det / ascaleX;
ashearY = MathUtils.Atan2(ra * rb + rc * rd, det) * MathUtils.RadDeg;
arotation = MathUtils.Atan2(rc, ra) * MathUtils.RadDeg;
} else {
ascaleX = 0;
ascaleY = (float)Math.Sqrt(rb * rb + rd * rd);
ashearY = 0;
arotation = 90 - MathUtils.Atan2(rd, rb) * MathUtils.RadDeg;
}
}
public void WorldToLocal (float worldX, float worldY, out float localX, out float localY) {
float a = this.a, b = this.b, c = this.c, d = this.d;
float invDet = 1 / (a * d - b * c);
float x = worldX - this.worldX, y = worldY - this.worldY;
localX = (x * d * invDet - y * b * invDet);
localY = (y * a * invDet - x * c * invDet);
}
public void LocalToWorld (float localX, float localY, out float worldX, out float worldY) {
worldX = localX * a + localY * b + this.worldX;
worldY = localX * c + localY * d + this.worldY;
}
public float WorldToLocalRotationX {
get {
Bone parent = this.parent;
if (parent == null) return arotation;
float pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d, a = this.a, c = this.c;
return MathUtils.Atan2(pa * c - pc * a, pd * a - pb * c) * MathUtils.RadDeg;
}
}
public float WorldToLocalRotationY {
get {
Bone parent = this.parent;
if (parent == null) return arotation;
float pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d, b = this.b, d = this.d;
return MathUtils.Atan2(pa * d - pc * b, pd * b - pb * d) * MathUtils.RadDeg;
}
}
public float WorldToLocalRotation (float worldRotation) {
float sin = MathUtils.SinDeg(worldRotation), cos = MathUtils.CosDeg(worldRotation);
return MathUtils.Atan2(a * sin - c * cos, d * cos - b * sin) * MathUtils.RadDeg + rotation - shearX;
}
public float LocalToWorldRotation (float localRotation) {
localRotation -= rotation - shearX;
float sin = MathUtils.SinDeg(localRotation), cos = MathUtils.CosDeg(localRotation);
return MathUtils.Atan2(cos * c + sin * d, cos * a + sin * b) * MathUtils.RadDeg;
}
/// <summary>
/// Rotates the world transform the specified amount and sets isAppliedValid to false.
/// </summary>
/// <param name="degrees">Degrees.</param>
public void RotateWorld (float degrees) {
float a = this.a, b = this.b, c = this.c, d = this.d;
float cos = MathUtils.CosDeg(degrees), sin = MathUtils.SinDeg(degrees);
this.a = cos * a - sin * c;
this.b = cos * b - sin * d;
this.c = sin * a + cos * c;
this.d = sin * b + cos * d;
appliedValid = false;
}
override public string ToString () {
return data.name;
}
}
}