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
|
#include "../util.h"
constexpr double EPS = 1e-6;
struct pt3 {
double x, y, z;
pt3 operator-(const pt3 o) const {
return {x-o.x, y-o.y, z-o.z};
}
pt3 operator+(const pt3 o) const {
return {x+o.x, y+o.y, z+o.z};
}
pt3 operator*(double m) const {
return {x*m, y*m, z*m};
}
pt3 operator/(double d) const {
return {x/d, y/d, z/d};
}
friend ostream& operator<<(ostream& os, pt3 p) {
return os << "(" << p.x << ", " << p.y << ", " << p.z << ")";
}
};
pt3 cross(pt3 a, pt3 b);
double abs(pt3 p);
double distToLine(pt3 a, pt3 b, pt3 p) {
return abs(cross(p - a, b - a)) / abs(b - a);
}
#include <geometry/formulas3d.cpp>
namespace Random {
pt3 point3d(ll l, ll r) {
return {
(double)integer<ll>(l, r),
(double)integer<ll>(l, r),
(double)integer<ll>(l, r),
};
}
template<size_t C>
std::array<pt3, C> distinct(ll l, ll r) {
std::array<pt3, C> res = {};
for (size_t i = 0; i < C; i++) {
bool unqiue;
do {
res[i] = point3d(l, r);
unqiue = true;
for (size_t j = 0; j < i; j++) {
unqiue &= res[j].x != res[i].x ||
res[j].y != res[i].y ||
res[j].z != res[i].z;
}
} while (!unqiue);
}
return res;
}
}
void test_dot(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto p = Random::point3d(-range, range);
auto q = Random::point3d(-range, range);
auto expected = p.x*q.x + p.y*q.y + p.z*q.z;
auto got = dot(p, q);
if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL;
queries++;
}
cerr << "tested dot: " << queries << endl;
}
void test_cross(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto p = Random::point3d(-range, range);
auto q = Random::point3d(-range, range);
auto expected = pt3{p.y*q.z - p.z*q.y,
p.z*q.x - p.x*q.z,
p.x*q.y - p.y*q.x};
auto got = cross(p, q);
if (got.x != expected.x) cerr << "error: x" << FAIL;
if (got.y != expected.y) cerr << "error: y" << FAIL;
if (got.z != expected.z) cerr << "error: z" << FAIL;
queries++;
}
cerr << "tested cross: " << queries << endl;
}
void test_abs(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto p = Random::point3d(-range, range);
auto expected = sqrt(p.x*p.x + p.y*p.y + p.z*p.z);
auto got = abs(p);
if (abs(got - expected) > 1e-6) cerr << "got: " << got << ", expected: " << expected << FAIL;
queries++;
}
cerr << "tested abs: " << queries << endl;
}
void test_mixed(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto a = Random::point3d(-range, range);
auto b = Random::point3d(-range, range);
auto c = Random::point3d(-range, range);
auto expected = dot(cross(a, b), c);
auto got = mixed(a, b, c);
if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL;
queries++;
}
cerr << "tested mixed: " << queries << endl;
}
void test_ccw(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto a = Random::point3d(-range, range);
auto b = Random::point3d(-range, range);
auto c = Random::point3d(-range, range);
auto d = Random::point3d(-range, range);
ll expected = mixed(b - a, c - a, d - a);
if (expected < 0) expected = -1;
if (expected > 0) expected = 1;
auto got = ccw(a, b, c, d);
if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL;
queries++;
}
cerr << "tested ccw: " << queries << endl;
}
void test_distToPlane(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto [p, q] = Random::distinct<2>(-range, range);
auto [a, b, c] = Random::distinct<3>(-range, range);
auto norm = cross(a - c, b - c);
norm = norm / abs(norm);
auto gotA = distToPlane(a, b, c, p);
auto gotB = distToPlane(a, b, c, q);
auto got = ccw(a, b, c, p) * ccw(a, b, c, q) < 0 ? gotA + gotB : abs(gotA - gotB);
auto expected = abs(dot(norm, p - q));
if (abs(got - expected) > 1e-6) cerr << "got: " << got << ", expected: " << expected << FAIL;
queries++;
}
cerr << "tested distToPlane: " << queries << endl;
}
void stress_pointOnPlane(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto p = Random::point3d(-range, range);
auto [a, b, c] = Random::distinct<3>(-range, range);
bool expected = ccw(a, b, c, p) == 0;
bool got = pointOnPlane(a, b, c, p);
if (got != expected) cerr << "error" << FAIL;
queries++;
}
cerr << "tested pointOnPlane: " << queries << endl;
}
void test_linePlaneIntersection(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto [p, q] = Random::distinct<2>(-range, range);
auto [a, b, c] = Random::distinct<3>(-range, range);
if (abs(dot(p - q, cross(a-c, b-c))) < 1e-6) continue;
auto got = linePlaneIntersection(p, q, a, b, c);
if (distToLine(p, q, got) > 1e-6) cerr << "error: 1" << FAIL;
if (distToPlane(a, b, c, got) > 1e-6) cerr << "error: 2" << FAIL;
queries++;
}
cerr << "tested linePlaneIntersection: " << queries << endl;
}
void test_lineLineDist(ll range) {
ll queries = 0;
for (int tries = 0; tries < 100'000; tries++) {
auto [p, q] = Random::distinct<2>(-range, range);
auto [a, b] = Random::distinct<2>(-range, range);
double expected = 0;
if (ccw(a, b, p, q) != 0) {
pt3 c = a + p - q;
expected = distToPlane(a, b, c, p);
}
auto got = lineLineDist(p, q, a, b);
if (abs(got - expected) > 1e-6) cerr << "got: " << got << ", expected: " << expected << FAIL;
queries++;
}
cerr << "tested lineLineDist: " << queries << endl;
}
int main() {
test_dot(100);
test_dot(1'000'000);
test_cross(100);
test_cross(1'000'000);
test_abs(100);
test_abs(1'000'000);
test_mixed(100);
test_mixed(1'000'000);
test_ccw(100);
test_ccw(1'000'000);
test_distToPlane(100);
test_distToPlane(1'000'000);
stress_pointOnPlane(100);
stress_pointOnPlane(1'000'000);
test_linePlaneIntersection(100);
test_linePlaneIntersection(1'000);//can be far away
test_lineLineDist(100);
test_lineLineDist(1'000'000);
}
|
