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5aea6baa
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three.js
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体验新版 GitCode,发现更多精彩内容 >>
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5aea6baa
编写于
4月 29, 2015
作者:
B
Ben Adams
浏览文件
操作
浏览文件
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电子邮件补丁
差异文件
CircleBufferGeometry
上级
768585a2
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
78 addition
and
0 deletion
+78
-0
src/extras/geometries/CircleBufferGeometry.js
src/extras/geometries/CircleBufferGeometry.js
+77
-0
utils/build/includes/extras.json
utils/build/includes/extras.json
+1
-0
未找到文件。
src/extras/geometries/CircleBufferGeometry.js
0 → 100644
浏览文件 @
5aea6baa
/**
* @author benaadams / https://twitter.com/ben_a_adams
*/
THREE
.
CircleBufferGeometry
=
function
(
radius
,
segments
,
thetaStart
,
thetaLength
)
{
THREE
.
BufferGeometry
.
call
(
this
);
this
.
type
=
'
CircleBufferGeometry
'
;
this
.
parameters
=
{
radius
:
radius
,
segments
:
segments
,
thetaStart
:
thetaStart
,
thetaLength
:
thetaLength
};
radius
=
radius
||
50
;
segments
=
segments
!==
undefined
?
Math
.
max
(
3
,
segments
)
:
8
;
thetaStart
=
thetaStart
!==
undefined
?
thetaStart
:
0
;
thetaLength
=
thetaLength
!==
undefined
?
thetaLength
:
Math
.
PI
*
2
;
var
i
;
var
stride
=
(
3
+
3
+
2
);
var
vertexData
=
new
Float32Array
(
(
segments
+
2
)
*
stride
);
var
vertexBuffer
=
new
THREE
.
InterleavedBuffer
(
vertexData
,
stride
);
var
positions
=
new
THREE
.
InterleavedBufferAttribute
(
vertexBuffer
,
3
,
0
);
this
.
addAttribute
(
'
position
'
,
positions
);
var
normals
=
new
THREE
.
InterleavedBufferAttribute
(
vertexBuffer
,
3
,
3
);
this
.
addAttribute
(
'
normal
'
,
normals
);
var
uvs
=
new
THREE
.
InterleavedBufferAttribute
(
vertexBuffer
,
2
,
6
);
this
.
addAttribute
(
'
uv
'
,
uvs
);
// center data is already zero, but need to set a few extras
// center normal z
vertexData
[
5
]
=
1.0
;
// center uv
vertexData
[
6
]
=
0.5
;
vertexData
[
7
]
=
0.5
;
for
(
i
=
stride
,
s
=
0
,
ul
=
(
segments
+
2
)
*
stride
;
i
<
ul
;
i
+=
stride
,
s
++
)
{
var
segment
=
thetaStart
+
s
/
segments
*
thetaLength
;
vertexData
[
i
]
=
radius
*
Math
.
cos
(
segment
);
// x
vertexData
[
i
+
1
]
=
radius
*
Math
.
sin
(
segment
);
// y
vertexData
[
i
+
5
]
=
1
;
// normal z
vertexData
[
i
+
6
]
=
(
vertexData
[
i
]
/
radius
+
1
)
/
2
;
// u
vertexData
[
i
+
7
]
=
(
vertexData
[
i
+
1
]
/
radius
+
1
)
/
2
;
// v
}
var
indices
=
[];
for
(
i
=
1
;
i
<=
segments
;
i
++
)
{
indices
.
push
(
i
);
indices
.
push
(
i
+
1
);
indices
.
push
(
0
);
}
this
.
addAttribute
(
'
index
'
,
new
THREE
.
BufferAttribute
(
new
Uint16Array
(
indices
),
1
)
);
this
.
computeFaceNormals
();
this
.
boundingSphere
=
new
THREE
.
Sphere
(
new
THREE
.
Vector3
(),
radius
);
};
THREE
.
CircleBufferGeometry
.
prototype
=
Object
.
create
(
THREE
.
BufferGeometry
.
prototype
);
THREE
.
CircleBufferGeometry
.
prototype
.
constructor
=
THREE
.
CircleBufferGeometry
;
utils/build/includes/extras.json
浏览文件 @
5aea6baa
...
...
@@ -27,6 +27,7 @@
"src/extras/animation/MorphAnimation.js"
,
"src/extras/geometries/BoxGeometry.js"
,
"src/extras/geometries/CircleGeometry.js"
,
"src/extras/geometries/CircleBufferGeometry.js"
,
"src/extras/geometries/CylinderGeometry.js"
,
"src/extras/geometries/EdgesGeometry.js"
,
"src/extras/geometries/ExtrudeGeometry.js"
,
...
...
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