最終效果:
將其他1/8圓補全即可。
export
default
class
spheregeometry
extends
three.buffergeometry
this
.indices =
this
.rs1 =
this
.parameters.radiussegments +
1this
.cornervertnumber =
this
.rs1 *
this
.parameters.radiussegments +
1this
.lastvertex =
this
.rs1 *
this
.parameters.radiussegments
this
.totalvertexcount =
(this
.rs1 *
this
.parameters.radiussegments +1)
<<3;
let positions =
newthree.bufferattribute
(new
float32array
(this
.totalvertexcount *3)
,3);
this
.vertexpool =
// [0~-90],[90~180],[180~270],[270~360]
this
.getver()
this
.docorners(0
)this
.getver()
this
.docorners(1
)this
.getver()
this
.docorners(2
)this
.getver()
this
.docorners(3
)this
.getver()
this
.docorners(4
)this
.getver()
this
.docorners(5
)this
.getver()
this
.docorners(6
)this
.getver()
this
.docorners(7
)// this.vertexpool = vertexpool
for(
var i =
0; i <
this
.vertexpool.length; i++
)this
.setindex
(new
three.bufferattribute
(new
uint16array
(this
.indices),1
));this
.setattribute
('position'
, positions);}
docorners
(i)=
this
.parameters
const
=this
var corneroffset =
this
.cornervertnumber * i;
var lastrowoffset = rs1 *
( radiussegments -1)
;// 每次迴圈產生一行的頂點索引
for(
var v =
0; v < radiussegments -
1; v++)}
// 最後最上面一行的三角形
for(
var u =
0; u < radiussegments; u++)}
getver()
=this
.parameters
var pihalf = math.pi/
2;let=
this
// 每次迴圈產生一行的頂點
for(
var y =
0; y <= radiussegments; y++
)// 每次迴圈產生乙個頂點
for(
var x =
0; x <= radiussegments; x++)}
return vertexpool
}}
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