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
|
<?xml version="1.0" encoding="UTF-8" ?>
<class name="float" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
Float built-in type.
</brief_description>
<description>
The [float] built-in type is a 64-bit double-precision floating-point number, equivalent to [code]double[/code] in C++. This type has 14 reliable decimal digits of precision. The [float] type can be stored in [Variant], which is the generic type used by the engine. The maximum value of [float] is approximately [code]1.79769e308[/code], and the minimum is approximately [code]-1.79769e308[/code].
Many methods and properties in the engine use 32-bit single-precision floating-point numbers instead, equivalent to [code]float[/code] in C++, which have 6 reliable decimal digits of precision. For data structures such as [Vector2] and [Vector3], Godot uses 32-bit floating-point numbers by default, but it can be changed to use 64-bit doubles if Godot is compiled with the [code]float=64[/code] option.
Math done using the [float] type is not guaranteed to be exact or deterministic, and will often result in small errors. You should usually use the [method @GlobalScope.is_equal_approx] and [method @GlobalScope.is_zero_approx] methods instead of [code]==[/code] to compare [float] values for equality.
</description>
<tutorials>
<link title="Wikipedia: Double-precision floating-point format">https://en.wikipedia.org/wiki/Double-precision_floating-point_format</link>
<link title="Wikipedia: Single-precision floating-point format">https://en.wikipedia.org/wiki/Single-precision_floating-point_format</link>
</tutorials>
<constructors>
<constructor name="float">
<return type="float" />
<description>
Constructs a default-initialized [float] set to [code]0.0[/code].
</description>
</constructor>
<constructor name="float">
<return type="float" />
<param index="0" name="from" type="float" />
<description>
Constructs a [float] as a copy of the given [float].
</description>
</constructor>
<constructor name="float">
<return type="float" />
<param index="0" name="from" type="bool" />
<description>
Cast a [bool] value to a floating-point value, [code]float(true)[/code] will be equal to 1.0 and [code]float(false)[/code] will be equal to 0.0.
</description>
</constructor>
<constructor name="float">
<return type="float" />
<param index="0" name="from" type="int" />
<description>
Cast an [int] value to a floating-point value, [code]float(1)[/code] will be equal to [code]1.0[/code].
</description>
</constructor>
</constructors>
<operators>
<operator name="operator !=">
<return type="bool" />
<param index="0" name="right" type="float" />
<description>
Returns [code]true[/code] if two floats are different from each other.
</description>
</operator>
<operator name="operator !=">
<return type="bool" />
<param index="0" name="right" type="int" />
<description>
Returns [code]true[/code] if the integer has different value than the float.
</description>
</operator>
<operator name="operator *">
<return type="Color" />
<param index="0" name="right" type="Color" />
<description>
Multiplies each component of the [Color] by the given [float].
[codeblock]
print(1.5 * Color(0.5, 0.5, 0.5)) # Color(0.75, 0.75, 0.75)
[/codeblock]
</description>
</operator>
<operator name="operator *">
<return type="Quaternion" />
<param index="0" name="right" type="Quaternion" />
<description>
Multiplies each component of the [Quaternion] by the given [float]. This operation is not meaningful on its own, but it can be used as a part of a larger expression.
</description>
</operator>
<operator name="operator *">
<return type="Vector2" />
<param index="0" name="right" type="Vector2" />
<description>
Multiplies each component of the [Vector2] by the given [float].
[codeblock]
print(2.5 * Vector2(1, 3)) # Prints "(2.5, 7.5)"
[/codeblock]
</description>
</operator>
<operator name="operator *">
<return type="Vector2" />
<param index="0" name="right" type="Vector2i" />
<description>
Multiplies each component of the [Vector2i] by the given [float]. Returns a [Vector2].
[codeblock]
print(0.9 * Vector2i(10, 15)) # Prints "(9, 13.5)"
[/codeblock]
</description>
</operator>
<operator name="operator *">
<return type="Vector3" />
<param index="0" name="right" type="Vector3" />
<description>
Multiplies each component of the [Vector3] by the given [float].
</description>
</operator>
<operator name="operator *">
<return type="Vector3" />
<param index="0" name="right" type="Vector3i" />
<description>
Multiplies each component of the [Vector3i] by the given [float]. Returns a [Vector3].
[codeblock]
print(0.9 * Vector3i(10, 15, 20)) # Prints "(9, 13.5, 18)"
[/codeblock]
</description>
</operator>
<operator name="operator *">
<return type="Vector4" />
<param index="0" name="right" type="Vector4" />
<description>
Multiplies each component of the [Vector4] by the given [float].
</description>
</operator>
<operator name="operator *">
<return type="Vector4" />
<param index="0" name="right" type="Vector4i" />
<description>
Multiplies each component of the [Vector4i] by the given [float]. Returns a [Vector4].
[codeblock]
print(0.9 * Vector4i(10, 15, 20, -10)) # Prints "(9, 13.5, 18, -9)"
[/codeblock]
</description>
</operator>
<operator name="operator *">
<return type="float" />
<param index="0" name="right" type="float" />
<description>
Multiplies two [float]s.
</description>
</operator>
<operator name="operator *">
<return type="float" />
<param index="0" name="right" type="int" />
<description>
Multiplies a [float] and an [int]. The result is a [float].
</description>
</operator>
<operator name="operator **">
<return type="float" />
<param index="0" name="right" type="float" />
<description>
Raises a [float] to a power of a [float].
[codeblock]
print(39.0625**0.25) # 2.5
[/codeblock]
</description>
</operator>
<operator name="operator **">
<return type="float" />
<param index="0" name="right" type="int" />
<description>
Raises a [float] to a power of an [int]. The result is a [float].
[codeblock]
print(0.9**3) # 0.729
[/codeblock]
</description>
</operator>
<operator name="operator +">
<return type="float" />
<param index="0" name="right" type="float" />
<description>
Adds two floats.
</description>
</operator>
<operator name="operator +">
<return type="float" />
<param index="0" name="right" type="int" />
<description>
Adds a [float] and an [int]. The result is a [float].
</description>
</operator>
<operator name="operator -">
<return type="float" />
<param index="0" name="right" type="float" />
<description>
Subtracts a float from a float.
</description>
</operator>
<operator name="operator -">
<return type="float" />
<param index="0" name="right" type="int" />
<description>
Subtracts an [int] from a [float]. The result is a [float].
</description>
</operator>
<operator name="operator /">
<return type="float" />
<param index="0" name="right" type="float" />
<description>
Divides two floats.
</description>
</operator>
<operator name="operator /">
<return type="float" />
<param index="0" name="right" type="int" />
<description>
Divides a [float] by an [int]. The result is a [float].
</description>
</operator>
<operator name="operator <">
<return type="bool" />
<param index="0" name="right" type="float" />
<description>
Returns [code]true[/code] if the left float is less than the right one.
</description>
</operator>
<operator name="operator <">
<return type="bool" />
<param index="0" name="right" type="int" />
<description>
Returns [code]true[/code] if this [float] is less than the given [int].
</description>
</operator>
<operator name="operator <=">
<return type="bool" />
<param index="0" name="right" type="float" />
<description>
Returns [code]true[/code] if the left float is less than or equal to the right one.
</description>
</operator>
<operator name="operator <=">
<return type="bool" />
<param index="0" name="right" type="int" />
<description>
Returns [code]true[/code] if this [float] is less than or equal to the given [int].
</description>
</operator>
<operator name="operator ==">
<return type="bool" />
<param index="0" name="right" type="float" />
<description>
Returns [code]true[/code] if both floats are exactly equal.
[b]Note:[/b] Due to floating-point precision errors, consider using [method @GlobalScope.is_equal_approx] or [method @GlobalScope.is_zero_approx] instead, which are more reliable.
</description>
</operator>
<operator name="operator ==">
<return type="bool" />
<param index="0" name="right" type="int" />
<description>
Returns [code]true[/code] if the [float] and the given [int] are equal.
</description>
</operator>
<operator name="operator >">
<return type="bool" />
<param index="0" name="right" type="float" />
<description>
Returns [code]true[/code] if the left float is greater than the right one.
</description>
</operator>
<operator name="operator >">
<return type="bool" />
<param index="0" name="right" type="int" />
<description>
Returns [code]true[/code] if this [float] is greater than the given [int].
</description>
</operator>
<operator name="operator >=">
<return type="bool" />
<param index="0" name="right" type="float" />
<description>
Returns [code]true[/code] if the left float is greater than or equal to the right one.
</description>
</operator>
<operator name="operator >=">
<return type="bool" />
<param index="0" name="right" type="int" />
<description>
Returns [code]true[/code] if this [float] is greater than or equal to the given [int].
</description>
</operator>
<operator name="operator unary+">
<return type="float" />
<description>
Returns the same value as if the [code]+[/code] was not there. Unary [code]+[/code] does nothing, but sometimes it can make your code more readable.
</description>
</operator>
<operator name="operator unary-">
<return type="float" />
<description>
Returns the negative value of the [float]. If positive, turns the number negative. If negative, turns the number positive. With floats, the number zero can be either positive or negative.
</description>
</operator>
</operators>
</class>
|