blob: ce37fa616076d4bf304f1bc6497c70df1375364c (
plain)
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
|
#ifndef __BLI_TIME_SPAN_H__
#define __BLI_TIME_SPAN_H__
#include "BLI_array_ref.h"
namespace BLI {
class FloatInterval {
private:
float m_start;
float m_size;
public:
FloatInterval(float start, float size) : m_start(start), m_size(size)
{
BLI_assert(size >= 0.0f);
}
float start() const
{
return m_start;
}
float size() const
{
return m_size;
}
float end() const
{
return m_start + m_size;
}
float value_at(float factor) const
{
return m_start + factor * m_size;
}
void value_at(ArrayRef<float> factors, MutableArrayRef<float> r_values)
{
assert_same_size(factors, r_values);
for (uint i : factors.index_range()) {
r_values[i] = this->value_at(factors[i]);
}
}
void sample_linear(MutableArrayRef<float> r_values)
{
if (r_values.size() == 0) {
return;
}
if (r_values.size() == 1) {
r_values[0] = this->value_at(0.5f);
}
for (uint i : r_values.index_range()) {
float factor = (i - 1) / (float)r_values.size();
r_values[i] = this->value_at(factor);
}
}
float factor_of(float value) const
{
BLI_assert(m_size > 0.0f);
return (value - m_start) / m_size;
}
float safe_factor_of(float value) const
{
if (m_size > 0.0f) {
return this->factor_of(value);
}
else {
return 0.0f;
}
}
void uniform_sample_range(float samples_per_time,
float &r_factor_start,
float &r_factor_step) const
{
if (m_size == 0.0f) {
/* Just needs to be greater than one. */
r_factor_start = 2.0f;
return;
}
r_factor_step = 1 / (m_size * samples_per_time);
float time_start = std::ceil(m_start * samples_per_time) / samples_per_time;
r_factor_start = this->safe_factor_of(time_start);
}
};
} // namespace BLI
#endif /* __BLI_TIME_SPAN_H__ */
|
