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ThreejsTutorial
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ThreejsTutorial
/
src
/
utils
/
lightIntensityStore.ts
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main
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ThreejsTutorial
/
src
/
utils
/
lightIntensityStore.ts
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/**
* 各光源的强度管理:集中配置初始值 + 分光源独立保存运行时值。
* 不同光源之间完全隔离:改一个光源的初始强度或拖动滑块,都不会影响其他光源。
*/
/**
* 各光源的初始强度,集中在此配置(改这里即可,互不影响)。
* key 为课程的 id。
*/
export
const
DEFAULT_INTENSITY
:
Record
<
string
,
number
>
=
{
'lights/directional-light'
:
3
,
// 平行光
'lights/point-light'
:
6
,
// 点光源
'lights/spot-light'
:
15
,
// 聚光灯
}
;
/** 运行时强度,按光源 id 分别保存,切换走再切回可恢复各自上次的值 */
const
store
=
new
Map
<
string
,
number
>
(
)
;
/** 读取某光源的初始强度(来自集中配置) */
export
function
getDefaultIntensity
(
lessonId
:
string
)
:
number
{
return
DEFAULT_INTENSITY
[
lessonId
]
??
1
;
}
/** 读取某光源的当前强度,未调节过时回退到其初始强度 */
export
function
getIntensity
(
lessonId
:
string
)
:
number
{
const
v
=
store
.
get
(
lessonId
)
;
return
v
===
undefined
?
getDefaultIntensity
(
lessonId
)
:
v
;
}
/** 写入某光源的当前强度,只影响该光源 */
export
function
setIntensity
(
lessonId
:
string
,
value
:
number
)
:
void
{
store
.
set
(
lessonId
,
value
)
;
}
/** 清除某光源已保存的运行时强度,使其回到初始强度 */
export
function
resetIntensity
(
lessonId
:
string
)
:
void
{
store
.
delete
(
lessonId
)
;
}
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