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three.js
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068ab90a
T
three.js
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068ab90a
编写于
8月 07, 2012
作者:
M
Mr.doob
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差异文件
Merge remote-tracking branch 'hughes/dev' into dev
上级
fb3c38c7
3234a5e0
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
54 addition
and
0 deletion
+54
-0
src/extras/geometries/CircleGeometry.js
src/extras/geometries/CircleGeometry.js
+54
-0
未找到文件。
src/extras/geometries/CircleGeometry.js
0 → 100644
浏览文件 @
068ab90a
/**
* @author hughes
*/
THREE
.
CircleGeometry
=
function
(
radius
,
segments
,
thetaStart
,
thetaLength
)
{
THREE
.
Geometry
.
call
(
this
);
radius
=
radius
||
50
;
thetaStart
=
thetaStart
!==
undefined
?
thetaStart
:
0
;
thetaLength
=
thetaLength
!==
undefined
?
thetaLength
:
Math
.
PI
*
2
;
segments
=
segments
!==
undefined
?
Math
.
max
(
3
,
segments
)
:
8
;
var
i
,
uvs
=
[],
center
=
new
THREE
.
Vector3
(),
centerUV
=
new
THREE
.
UV
(
0.5
,
0.5
);
this
.
vertices
.
push
(
center
);
uvs
.
push
(
centerUV
);
for
(
i
=
0
;
i
<=
segments
;
i
++
)
{
var
vertex
=
new
THREE
.
Vector3
();
vertex
.
x
=
radius
*
Math
.
cos
(
thetaStart
+
i
/
segments
*
thetaLength
);
vertex
.
y
=
radius
*
Math
.
sin
(
thetaStart
+
i
/
segments
*
thetaLength
);
this
.
vertices
.
push
(
vertex
);
uvs
.
push
(
new
THREE
.
UV
(
(
vertex
.
x
/
radius
+
1
)
/
2
,
-
(
vertex
.
y
/
radius
+
1
)
/
2
+
1
)
);
}
var
n
=
new
THREE
.
Vector3
(
0
,
0
,
-
1
);
for
(
i
=
1
;
i
<=
segments
;
i
++
)
{
var
v1
=
i
;
var
v2
=
i
+
1
;
var
v3
=
0
;
this
.
faces
.
push
(
new
THREE
.
Face3
(
v1
,
v2
,
v3
,
[
n
,
n
,
n
]));
this
.
faceVertexUvs
[
0
].
push
(
[
uvs
[
i
],
uvs
[
i
+
1
],
centerUV
]
);
}
this
.
computeCentroids
();
this
.
computeFaceNormals
();
this
.
boundingSphere
=
{
radius
:
radius
};
};
THREE
.
CircleGeometry
.
prototype
=
new
THREE
.
Geometry
();
THREE
.
CircleGeometry
.
prototype
.
constructor
=
THREE
.
CircleGeometry
;
\ No newline at end of file
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