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three.js
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3595365f
T
three.js
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体验新版 GitCode,发现更多精彩内容 >>
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3595365f
编写于
12月 21, 2012
作者:
B
Ben Houston
浏览文件
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电子邮件补丁
差异文件
add Plane.intersectLine with unit tests.
上级
eb25ee76
变更
2
显示空白变更内容
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并排
Showing
2 changed file
with
59 addition
and
0 deletion
+59
-0
src/math/Plane.js
src/math/Plane.js
+34
-0
test/unit/math/Plane.js
test/unit/math/Plane.js
+25
-0
未找到文件。
src/math/Plane.js
浏览文件 @
3595365f
...
...
@@ -112,6 +112,40 @@ THREE.Plane.prototype = {
},
intersectLine
:
function
(
startPoint
,
endPoint
,
optionalTarget
)
{
var
result
=
optionalTarget
||
new
THREE
.
Vector3
();
var
direction
=
THREE
.
Plane
.
__v1
.
sub
(
endPoint
,
startPoint
);
var
denominator
=
this
.
normal
.
dot
(
direction
);
if
(
denominator
==
0
)
{
// line is coplanar, return origin
if
(
this
.
distanceToPoint
(
startPoint
)
==
0
)
{
return
result
.
copy
(
startPoint
);
}
// Unsure if this is the correct method to handle this case.
return
undefined
;
}
var
t
=
-
(
startPoint
.
dot
(
this
.
normal
)
+
this
.
constant
)
/
denominator
;
if
(
t
<
0
||
t
>
1
)
{
return
undefined
;
}
return
result
.
copy
(
direction
).
multiplyScalar
(
t
).
addSelf
(
startPoint
);
},
coplanarPoint
:
function
(
optionalTarget
)
{
var
result
=
optionalTarget
||
new
THREE
.
Vector3
();
...
...
test/unit/math/Plane.js
浏览文件 @
3595365f
...
...
@@ -115,6 +115,31 @@ test( "distanceToSphere", function() {
ok
(
a
.
distanceToSphere
(
b
)
===
-
1
,
"
Passed!
"
);
});
test
(
"
isInterestionLine/intersectLine
"
,
function
()
{
var
a
=
new
THREE
.
Plane
(
new
THREE
.
Vector3
(
1
,
0
,
0
),
0
);
ok
(
a
.
isIntersectionLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
),
"
Passed!
"
);
ok
(
a
.
intersectLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
).
equals
(
new
THREE
.
Vector3
(
0
,
0
,
0
)
),
"
Passed!
"
);
a
=
new
THREE
.
Plane
(
new
THREE
.
Vector3
(
1
,
0
,
0
),
-
3
);
ok
(
a
.
isIntersectionLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
),
"
Passed!
"
);
ok
(
a
.
intersectLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
).
equals
(
new
THREE
.
Vector3
(
3
,
0
,
0
)
),
"
Passed!
"
);
a
=
new
THREE
.
Plane
(
new
THREE
.
Vector3
(
1
,
0
,
0
),
-
11
);
ok
(
!
a
.
isIntersectionLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
),
"
Passed!
"
);
ok
(
a
.
intersectLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
)
===
undefined
,
"
Passed!
"
);
a
=
new
THREE
.
Plane
(
new
THREE
.
Vector3
(
1
,
0
,
0
),
11
);
ok
(
!
a
.
isIntersectionLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
),
"
Passed!
"
);
ok
(
a
.
intersectLine
(
new
THREE
.
Vector3
(
-
10
,
0
,
0
),
new
THREE
.
Vector3
(
10
,
0
,
0
)
)
===
undefined
,
"
Passed!
"
);
});
test
(
"
projectPoint
"
,
function
()
{
var
a
=
new
THREE
.
Plane
(
new
THREE
.
Vector3
(
1
,
0
,
0
),
0
);
...
...
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