-
Notifications
You must be signed in to change notification settings - Fork 5
/
NurbsCurveHelper.cpp
330 lines (283 loc) · 10.8 KB
/
NurbsCurveHelper.cpp
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
//-*****************************************************************************
//
// Copyright (c) 2009-2011,
// Sony Pictures Imageworks, Inc. and
// Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Sony Pictures Imageworks, nor
// Industrial Light & Magic nor the names of their contributors may be used
// to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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.
//
//-*****************************************************************************
#include "util.h"
#include "NurbsCurveHelper.h"
#include <maya/MString.h>
#include <maya/MPoint.h>
#include <maya/MPointArray.h>
#include <maya/MDoubleArray.h>
#include <maya/MFnNurbsCurve.h>
#include <maya/MFnNurbsCurveData.h>
#include <maya/MFnTransform.h>
#include <maya/MFnNumericAttribute.h>
#include <maya/MFnNumericData.h>
#include <maya/MFnDoubleArrayData.h>
#include <maya/MFnGenericAttribute.h>
#include <maya/MPlug.h>
MStatus readCurves(double iFrame, const Alembic::AbcGeom::ICurves & iNode,
std::size_t iExpectedCurves, std::vector<MObject> & ioCurveObjects)
{
MFnNurbsCurve mFn;
MStatus status;
Alembic::AbcGeom::ICurvesSchema schema = iNode.getSchema();
Alembic::AbcCoreAbstract::index_t index, ceilIndex;
double alpha = getWeightAndIndex(iFrame, schema.getTimeSampling(),
schema.getNumSamples(), index, ceilIndex);
Alembic::AbcGeom::ICurvesSchema::Sample samp, ceilSamp;
schema.get(samp, index);
unsigned int numCurves = static_cast<unsigned int>(samp.getNumCurves());
bool interp = false;
if (alpha != 0.0 && index != ceilIndex)
{
schema.get(ceilSamp, ceilIndex);
if (ceilSamp.getNumCurves() == numCurves)
{
interp = true;
}
}
Alembic::Abc::P3fArraySamplePtr sampPoints = samp.getPositions();
Alembic::Abc::P3fArraySamplePtr ceilPoints = ceilSamp.getPositions();
Alembic::Abc::Int32ArraySamplePtr numVertices =
samp.getCurvesNumVertices();
Alembic::Abc::Int32ArraySamplePtr ceilNumVertices =
ceilSamp.getCurvesNumVertices();
if (interp && sampPoints->size() != ceilPoints->size())
{
interp = false;
}
unsigned int degree = 1;
if (samp.getType() == Alembic::AbcGeom::kCubic)
{
degree = 3;
}
std::size_t curVert = 0;
for (std::size_t i = 0; i < iExpectedCurves && i < numCurves; ++i)
{
MPointArray cvs;
int numVerts = (*numVertices)[i];
int j;
for (j = 0; j < numVerts; ++j, ++curVert)
{
Alembic::Abc::V3f pos = (*sampPoints)[curVert];
if (interp)
{
Alembic::Abc::V3f ceilPos = (*ceilPoints)[curVert];
cvs.append(simpleLerp<float>(alpha, pos.x, ceilPos.x),
simpleLerp<float>(alpha, pos.y, ceilPos.y),
simpleLerp<float>(alpha, pos.z, ceilPos.z));
}
else
{
cvs.append(pos.x, pos.y, pos.z);
}
}
MFnNurbsCurve::Form form = MFnNurbsCurve::kOpen;
// so that we don't have any creation issues, double check the points
// line up
if (samp.getWrap() == Alembic::AbcGeom::kPeriodic)
{
if (degree == 3 && numVerts > 2 && cvs[0] == cvs[numVerts-3] &&
cvs[1] == cvs[numVerts-2] && cvs[2] == cvs[numVerts-1])
{
form = MFnNurbsCurve::kPeriodic;
}
else if (numVerts > 2 && cvs[0] == cvs[numVerts-1])
{
form = MFnNurbsCurve::kClosed;
}
}
// for now evenly distribute the knots
MDoubleArray knots;
int numKnots = numVerts + degree - 1;
for (j = 0; j < numKnots; ++j)
{
knots.append(j/(double)(numKnots-1));
}
// we need to make sure the first 3 and last 3 knots repeat
if (form == MFnNurbsCurve::kClosed && degree == 3 && numKnots > 2)
{
knots[1] = knots[0];
knots[2] = knots[0];
knots[numKnots-2] = knots[numKnots-1];
knots[numKnots-3] = knots[numKnots-1];
}
MFnNurbsCurveData curveData;
MObject curveDataObj = curveData.create();
ioCurveObjects.push_back(curveDataObj);
MFnNurbsCurve curve;
curve.create(cvs, knots, degree, form, false, true,
curveDataObj);
}
// push Nulls for extra curves
for (std::size_t i = numCurves; i < iExpectedCurves; ++i)
{
MFnNurbsCurveData curveData;
MObject curveDataObj = curveData.create();
ioCurveObjects.push_back(curveDataObj);
}
return status;
}
// mObject: if only one curve in the curve group, returns the curve node;
// otherwise returns the transform node of the curve group
MObject createCurves(const std::string & iName,
Alembic::AbcGeom::ICurvesSchema::Sample & iSample,
Alembic::AbcGeom::IFloatGeomParam::Sample & iWidths,
MObject & iParent, std::vector< MObject > & ioCurves, bool isAnimated)
{
MObject returnObj;
std::size_t numCurves = iSample.getNumCurves();
Alembic::Abc::FloatArraySamplePtr widths = iWidths.getVals();
Alembic::Abc::Int32ArraySamplePtr curvesNumVertices =
iSample.getCurvesNumVertices();
Alembic::Abc::P3fArraySamplePtr positions = iSample.getPositions();
MString name(iName.c_str());
MObject parent = iParent;
if (numCurves > 1)
{
MFnTransform fnTrans;
parent = fnTrans.create(iParent);
fnTrans.setName(name);
returnObj = parent;
if (parent.isNull())
{
MString theError("Failed to create curves group parent node: ");
theError += iName.c_str();
printError(theError);
return returnObj;
}
MFnNumericAttribute attr;
MObject attrObj = attr.create("riCurves", "riCurves",
MFnNumericData::kBoolean, 1);
fnTrans.addAttribute(attrObj,
MFnDependencyNode::kLocalDynamicAttr);
// constant width
if (widths && widths->size() == 1)
{
MFnNumericAttribute widthAttr;
attrObj = widthAttr.create("width", "width",
MFnNumericData::kFloat, (*widths)[0]);
fnTrans.addAttribute(attrObj,
MFnDependencyNode::kLocalDynamicAttr);
}
}
unsigned int degree = 1;
if (iSample.getType() == Alembic::AbcGeom::kCubic)
{
degree = 3;
}
std::size_t curVert = 0;
for (std::size_t i = 0; i < numCurves; ++i)
{
MPointArray cvs;
int numVerts = (*curvesNumVertices)[i];
int j;
for (j = 0; j < numVerts; ++j, ++curVert)
{
Alembic::Abc::V3f pos = (*positions)[curVert];
cvs.append(pos.x, pos.y, pos.z);
}
MFnNurbsCurve::Form form = MFnNurbsCurve::kOpen;
// so that we don't have any creation issues, double check the points
// line up
if (iSample.getWrap() == Alembic::AbcGeom::kPeriodic)
{
if (degree == 3 && numVerts > 2 && cvs[0] == cvs[numVerts-3] &&
cvs[1] == cvs[numVerts-2] && cvs[2] == cvs[numVerts-1])
{
form = MFnNurbsCurve::kPeriodic;
}
else if (numVerts > 2 && cvs[0] == cvs[numVerts-1])
{
form = MFnNurbsCurve::kClosed;
}
}
// for now evenly distribute the knots
MDoubleArray knots;
int numKnots = numVerts + degree - 1;
for (j = 0; j < numKnots; ++j)
{
knots.append(j/(double)(numKnots-1));
}
// we need to make sure the first 3 and last 3 knots repeat
if (form == MFnNurbsCurve::kClosed && degree == 3 && numKnots > 2)
{
knots[1] = knots[0];
knots[2] = knots[0];
knots[numKnots-2] = knots[numKnots-1];
knots[numKnots-3] = knots[numKnots-1];
}
MFnNurbsCurve curve;
MObject curveObj = curve.create(cvs, knots, degree, form, false, true,
parent);
curve.setName(name);
if (isAnimated)
{
ioCurves.push_back(curveObj);
}
if (numCurves == 1)
{
returnObj = curveObj;
}
// constant width, 1 curve just put it on the curve shape
if (numCurves == 1 && widths && widths->size() == 1 &&
iWidths.getScope() == Alembic::AbcGeom::kConstantScope)
{
MFnNumericAttribute widthAttr;
MObject attrObj = widthAttr.create("width",
"width", MFnNumericData::kFloat, (*widths)[0]);
curve.addAttribute(attrObj,
MFnDependencyNode::kLocalDynamicAttr);
}
// per vertex width
else if (widths && widths->size() >= curVert && numVerts > 0 &&
iWidths.getScope() == Alembic::AbcGeom::kVertexScope)
{
MDoubleArray array((const float *)(
&(*widths)[curVert-numVerts]), numVerts);
MFnDoubleArrayData mFn;
MObject attrObject = mFn.create(array);
MFnGenericAttribute attr(attrObject);
MObject attrObj = attr.create("width", "width");
attr.addDataAccept(MFnData::kDoubleArray);
MFnDependencyNode mParentFn(curve.object());
mParentFn.addAttribute(attrObj,
MFnDependencyNode::kLocalDynamicAttr);
MPlug plug(curveObj, attrObj);
plug.setValue(attrObject);
}
}
return returnObj;
}