IShaders - YouScene Documentation

IShaders

着色器

new YS.IShaders(ys, i3d)

自定义shader类

Name	Type	Description
`ys`	YouScene	YouScene实例
`i3d`	I3d	3d对象

Example:

var shader = new YS.DrawRectangleShader(scene);
shader.init();

//更新框选范围
var p1 = YS.MathEngine.sphericalToModelR(SCENE._modelMatrix, extent.west, extent.south, centerZ);
var p2 = YS.MathEngine.sphericalToModelR(SCENE._modelMatrix, extent.east, extent.north, centerZ);

shader.update(p1, p2);

See:

DefaultShader 默认shader
WatermarkShader 水印shader
DrawRectangleShader 拉框shader
FlattenBoxShader 方盒内场景压平shader
FlattenShader 场景整体压平shader
FlattenPolygonShader 按多边形区域压平场景shader
MoedelCutShader 按多边形区域裁剪场景shader

Members

model

数据实体

Properties:

Type	Description
I3d

Methods

init(options)

初始化shader

Name Type Description

options

Object

optional options

Name	Type	Description
`programs`	Array.<Number>	optional 要更改shader的program序号数组

abstractsetUniforms(uniforms)

设置shader的uniform变量

Name Type Description

uniforms

Array

uniforms变量定义

Name	Type	Description
`name`	string	uniforms变量名
`typeId`	Cesium.WebGLConstants	uniforms变量类型
`count`	int	optional 如果uniforms是数组的话，这里定义数组长度，否则0或者undefined
`defaultValue`	Object	变量默认值

Example:

[{
       name: 'u_from',
       typeId: Cesium.WebGLConstants.FLOAT_VEC2,
       defaultValue: [0, 0]
  }
]

update()

更新shader数据