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b9fb1426
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three.js
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b9fb1426
编写于
3月 14, 2012
作者:
Z
zz85
浏览文件
操作
浏览文件
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电子邮件补丁
差异文件
.getTangent() is now t2-t1. .updateArcLengths() added to curve
上级
359d2233
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
46 addition
and
6 deletion
+46
-6
src/extras/core/Curve.js
src/extras/core/Curve.js
+46
-6
未找到文件。
src/extras/core/Curve.js
浏览文件 @
b9fb1426
...
...
@@ -138,6 +138,12 @@ THREE.Curve.prototype.getLengths = function ( divisions ) {
};
THREE
.
Curve
.
prototype
.
updateArcLengths
=
function
()
{
this
.
needsUpdate
=
true
;
this
.
getLengths
();
};
// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equi distance
THREE
.
Curve
.
prototype
.
getUtoTmapping
=
function
(
u
,
distance
)
{
...
...
@@ -249,7 +255,7 @@ THREE.Curve.prototype.getTangent = function( t ) {
var
pt1
=
this
.
getPoint
(
t1
);
var
pt2
=
this
.
getPoint
(
t2
);
var
vec
=
pt
1
.
clone
().
subSelf
(
pt2
);
var
vec
=
pt
2
.
clone
().
subSelf
(
pt1
);
return
vec
.
normalize
();
};
...
...
@@ -711,12 +717,17 @@ THREE.SplineCurve3 = THREE.Curve.create(
c
[
0
]
=
intPoint
==
0
?
intPoint
:
intPoint
-
1
;
c
[
1
]
=
intPoint
;
c
[
2
]
=
intPoint
>
points
.
length
-
2
?
points
.
length
-
1
:
intPoint
+
1
;
c
[
3
]
=
intPoint
>
points
.
length
-
3
?
points
.
length
-
1
:
intPoint
+
2
;
c
[
2
]
=
intPoint
>
points
.
length
-
2
?
points
.
length
-
1
:
intPoint
+
1
;
c
[
3
]
=
intPoint
>
points
.
length
-
3
?
points
.
length
-
1
:
intPoint
+
2
;
v
.
x
=
THREE
.
Curve
.
Utils
.
interpolate
(
points
[
c
[
0
]
].
x
,
points
[
c
[
1
]
].
x
,
points
[
c
[
2
]
].
x
,
points
[
c
[
3
]
].
x
,
weight
);
v
.
y
=
THREE
.
Curve
.
Utils
.
interpolate
(
points
[
c
[
0
]
].
y
,
points
[
c
[
1
]
].
y
,
points
[
c
[
2
]
].
y
,
points
[
c
[
3
]
].
y
,
weight
);
v
.
z
=
THREE
.
Curve
.
Utils
.
interpolate
(
points
[
c
[
0
]
].
z
,
points
[
c
[
1
]
].
z
,
points
[
c
[
2
]
].
z
,
points
[
c
[
3
]
].
z
,
weight
);
var
pt0
=
points
[
c
[
0
]
],
pt1
=
points
[
c
[
1
]
],
pt2
=
points
[
c
[
2
]
],
pt3
=
points
[
c
[
3
]
];
v
.
x
=
THREE
.
Curve
.
Utils
.
interpolate
(
pt0
.
x
,
pt1
.
x
,
pt2
.
x
,
pt3
.
x
,
weight
);
v
.
y
=
THREE
.
Curve
.
Utils
.
interpolate
(
pt0
.
y
,
pt1
.
y
,
pt2
.
y
,
pt3
.
y
,
weight
);
v
.
z
=
THREE
.
Curve
.
Utils
.
interpolate
(
pt0
.
z
,
pt1
.
z
,
pt2
.
z
,
pt3
.
z
,
weight
);
return
v
;
...
...
@@ -724,6 +735,35 @@ THREE.SplineCurve3 = THREE.Curve.create(
);
// THREE.SplineCurve3.prototype.getTangent = function(t) {
// var v = new THREE.Vector3();
// var c = [];
// var points = this.points, point, intPoint, weight;
// point = ( points.length - 1 ) * t;
// intPoint = Math.floor( point );
// weight = point - intPoint;
// c[ 0 ] = intPoint == 0 ? intPoint : intPoint - 1;
// c[ 1 ] = intPoint;
// c[ 2 ] = intPoint > points.length - 2 ? points.length - 1 : intPoint + 1;
// c[ 3 ] = intPoint > points.length - 3 ? points.length - 1 : intPoint + 2;
// var pt0 = points[ c[0] ],
// pt1 = points[ c[1] ],
// pt2 = points[ c[2] ],
// pt3 = points[ c[3] ];
// // t = weight;
// v.x = THREE.Curve.Utils.tangentSpline( t, pt0.x, pt1.x, pt2.x, pt3.x );
// v.y = THREE.Curve.Utils.tangentSpline( t, pt0.y, pt1.y, pt2.y, pt3.y );
// v.z = THREE.Curve.Utils.tangentSpline( t, pt0.z, pt1.z, pt2.z, pt3.z );
// return v;
// }
/**************************************************************
* Closed Spline 3D curve
**************************************************************/
...
...
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