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
|
// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtTest>
#include <QtQuick3DRuntimeRender/private/qssgrenderray_p.h>
class intersection : public QObject
{
Q_OBJECT
public:
intersection() = default;
~intersection() = default;
private slots:
void test_aabbIntersectionv2();
void test_aabbIntersectionScaledv2();
void test_aabbIntersectionTranslatedv2();
void test_aabbIntersectionRotatedv2();
private:
static QSSGRenderRay::IntersectionResult intersectWithAABBv2_proxy(const QMatrix4x4 &inGlobalTransform,
const QSSGBounds3 &inBounds,
const QSSGRenderRay &ray)
{
QSSGRenderRay::RayData data = QSSGRenderRay::createRayData(inGlobalTransform, ray);
const auto hit = QSSGRenderRay::intersectWithAABBv2(data, inBounds);
return hit.intersects() ? QSSGRenderRay::createIntersectionResult(data, hit)
: QSSGRenderRay::IntersectionResult();
}
using IntersectionFunc = std::function<QSSGRenderRay::IntersectionResult(const QMatrix4x4 &, const QSSGBounds3 &, const QSSGRenderRay &)>;
void aabbIntersection(const IntersectionFunc &intersectFunc);
void aabbIntersectionScaled(const IntersectionFunc &intersectFunc);
void aabbIntersectionTranslated(const IntersectionFunc &intersectFunc);
void aabbIntersectionRotated(const IntersectionFunc &intersectFunc);
};
void intersection::test_aabbIntersectionv2()
{
aabbIntersection(&intersection::intersectWithAABBv2_proxy);
}
void intersection::test_aabbIntersectionScaledv2()
{
aabbIntersectionScaled(&intersection::intersectWithAABBv2_proxy);
}
void intersection::test_aabbIntersectionTranslatedv2()
{
aabbIntersectionTranslated(&intersection::intersectWithAABBv2_proxy);
}
void intersection::test_aabbIntersectionRotatedv2()
{
aabbIntersectionRotated(&intersection::intersectWithAABBv2_proxy);
}
void intersection::aabbIntersection(const IntersectionFunc &intersectFunc)
{
QSSGRenderRay::IntersectionResult res;
QMatrix4x4 globalTransform; // Identity
// Bounding box of size 1, placed at origin
QSSGBounds3 bounds { /*min=*/ QVector3D{ -0.5f, -0.5f, -0.5f }, /*max=*/ QVector3D{ 0.5f, 0.5f, 0.5f } };
// Pick ray goes directly down the z-axis and should hit directly in the middle of the box
auto pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
{ // Test against a flat bounding volume
QSSGBounds3 boundsFlat { /*min=*/ QVector3D{ -1.0f, 0.0f, -1.0f }, /*max=*/ QVector3D{ 1.0f, 0.0f, 1.0f } };
res = intersectFunc(globalTransform, boundsFlat, QSSGRenderRay(/*Origin=*/{0.0f, 10.0f, 0.0f}, /*Direction=*/{0.0f, -1.0f, 0.0f}));
QCOMPARE(res.intersects, true);
}
{ // horizontal scan
const int steps = 10;
const float stepping = (bounds.maximum.x() - bounds.minimum.x()) / float(steps);
float rayX = bounds.minimum.x() - stepping;
const float rayY = (bounds.maximum.y() - bounds.minimum.y()) / 2.0f;
// First pick should fail, as it's just outside the bound's x extents
QVERIFY(rayX < bounds.maximum.x());
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
// scan through the bounding box along the x-axis
rayX = bounds.minimum.x();
for (int i = 0; i != steps; ++i, rayX += stepping) {
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
// Do one more step to go outside the box and test that we don't hit.
rayX += stepping;
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
}
{ // vertical scan
const int steps = 10;
const float stepping = (bounds.maximum.y() - bounds.minimum.y()) / float(steps);
float rayY = bounds.minimum.y() - stepping;
const float rayX = (bounds.maximum.x() - bounds.minimum.x()) / 2.0f;
// First pick should fail, as it's just outside the bound's y extents
QVERIFY(rayY < bounds.maximum.y());
pickRay = QSSGRenderRay(/*Origin=*/{rayY, rayX, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
// scan through the bounding box along the y-axis
rayY = bounds.minimum.y();
for (int i = 0; i != steps; ++i, rayY += stepping) {
pickRay = QSSGRenderRay(/*Origin=*/{rayY, rayX, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
// Do one more step to go outside the box and test that we don't hit.
rayY += stepping;
pickRay = QSSGRenderRay(/*Origin=*/{rayY, rayX, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
}
}
void intersection::aabbIntersectionScaled(const IntersectionFunc &intersectFunc)
{
QSSGRenderRay::IntersectionResult res;
QMatrix4x4 globalTransform; // Identity
// Bounding box of size 1, placed at origin
QSSGBounds3 bounds { /*min=*/ QVector3D{ -0.5f, -0.5f, -0.5f }, /*max=*/ QVector3D{ 0.5f, 0.5f, 0.5f } };
// Pick ray goes directly down the z-axis and should hit directly in the middle of the box
auto pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
{ // Scale +
globalTransform.setToIdentity();
const float scale = 2.0f;
globalTransform.scale(scale);
const float rayY = bounds.minimum.y() * scale;
const float rayX = bounds.minimum.x() * scale;
pickRay = QSSGRenderRay(/*Origin=*/{rayY, rayX, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
{ // Scale -
globalTransform.setToIdentity();
const float scale = -2.0f;
globalTransform.scale(scale);
const float rayY = bounds.maximum.y() * scale;
const float rayX = bounds.maximum.x() * scale;
pickRay = QSSGRenderRay(/*Origin=*/{rayY, rayX, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
}
void intersection::aabbIntersectionTranslated(const IntersectionFunc &intersectFunc)
{
QSSGRenderRay::IntersectionResult res;
QMatrix4x4 globalTransform; // Identity
// Bounding box of size 1, placed at origin
QSSGBounds3 bounds { /*min=*/ QVector3D{ -0.5f, -0.5f, -0.5f }, /*max=*/ QVector3D{ 0.5f, 0.5f, 0.5f } };
// Pick ray goes directly down the z-axis and should hit directly in the middle of the box
auto pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
{ // Translate 1
globalTransform.setToIdentity();
const float uniformTranslation = 1.0f;
globalTransform.translate(uniformTranslation, uniformTranslation);
// Verify that we can get a hit in the center of the bounding box
pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
const float rayY = bounds.minimum.y() + uniformTranslation;
const float rayX = bounds.minimum.x() + uniformTranslation;
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
{ // Translate 2
globalTransform.setToIdentity();
const float translationX = -1.0f;
const float translationY = 1.0f;
globalTransform.translate(translationX, translationY);
// Verify that we can get a hit in the center of the bounding box
pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
const float rayY = bounds.minimum.y() + translationY;
const float rayX = bounds.minimum.x() + translationX;
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
{ // Translate 3
globalTransform.setToIdentity();
const float uniformTranslation = -1.0f;
globalTransform.translate(uniformTranslation, uniformTranslation);
// Verify that we can get a hit in the center of the bounding box
pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
const float rayY = bounds.maximum.y() + uniformTranslation;
const float rayX = bounds.maximum.x() + uniformTranslation;
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
{ // Translate 4
globalTransform.setToIdentity();
const float translationX = 1.0f;
const float translationY = -1.0f;
globalTransform.translate(translationX, translationY);
// Verify that we can get a hit in the center of the bounding box
pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
const float rayY = bounds.minimum.y() + translationY;
const float rayX = bounds.minimum.x() + translationX;
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
}
void intersection::aabbIntersectionRotated(const IntersectionFunc &intersectFunc)
{
QSSGRenderRay::IntersectionResult res;
QMatrix4x4 globalTransform; // Identity
// Bounding box of size 1, placed at origin
QSSGBounds3 bounds { /*min=*/ QVector3D{ -0.5f, -0.5f, -0.5f }, /*max=*/ QVector3D{ 0.5f, 0.5f, 0.5f } };
// Pick ray goes directly down the z-axis and should hit directly in the middle of the box
auto pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
{ // Rotate
globalTransform.setToIdentity();
const float rotation = 45.0f;
globalTransform.rotate(rotation, {0.0f, 0.0f, 1.0f});
// Verify that we can get a hit in the center of the bounding box
pickRay = QSSGRenderRay(/*Origin=*/{0.0f, 0.0f, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
float rayX = bounds.minimum.x();
float rayY = bounds.minimum.y();
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
rayX = bounds.maximum.x();
rayY = bounds.maximum.y();
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, false);
const auto center = bounds.center();
rayX = center.x();
rayY = center.y() + std::sqrt(bounds.dimensions().x() + bounds.dimensions().y()) * 0.5f;
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
rayX = center.x() + std::sqrt(bounds.dimensions().x() + bounds.dimensions().y()) * 0.5f;
rayY = center.y();
pickRay = QSSGRenderRay(/*Origin=*/{rayX, rayY, 10.0f}, /*Direction=*/{0.0f, 0.0f, -1.0f});
res = intersectFunc(globalTransform, bounds, pickRay);
QCOMPARE(res.intersects, true);
}
}
QTEST_APPLESS_MAIN(intersection)
#include "tst_intersection.moc"
|
