Constructor
new Attribute(data, attributeLength, name)
- Source:
Properties:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
type |
String | The type name of this object (Lore.Attribute). |
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data |
* | The data represented by the attribute in a 1D array. Usually a Float32Array. |
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attributeLength |
Number |
<optional> |
3
|
The length of the attribute. '3' for Vector3f. |
name |
String | The name of this attribut. Must be the name used by the shader. |
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size |
Number | The length of the attribute values (defined as data.length / attributeLength). |
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buffer |
WebGLBuffer | The bound WebGLBuffer. |
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attributeLocation |
GLint | The attribute location for this attribute. |
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bufferType |
GLenum | The buffer target. As of WebGL 1: gl.ARRAY_BUFFER or gl.ELEMENT_ARRAY_BUFFER. |
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drawMode |
GLenum | The draw mode. As of WebGL 1: gl.STATIC_DRAW, gl.DYNAMIC_DRAW or gl.STREAM_DRAW. |
||
stale |
Boolean | A boolean indicating whether or not this attribute has changed and needs to be updated. |
Creates an instance of Attribute.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
* | The data represented by the attribute in a 1D array. Usually a Float32Array. |
attributeLength |
Number | The length of the attribute (3 for RGB, XYZ, ...). |
name |
String | The name of the attribute. |
Methods
bind(gl)
- Source:
Bind the buffer of this attribute. The attribute must exist in the current shader.
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The WebGL rendering context. |
createBuffer(gl, program, bufferType, drawMode)
- Source:
Create a new WebGL buffer.
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The WebGL rendering context. |
program |
WebGLProgram | A WebGL program. |
bufferType |
GLenum | The buffer type. |
drawMode |
GLenum | The draw mode. |
getGlType(gl) → {Number}
- Source:
Returns the gl type. Currently only float is supported.
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The WebGL rendering context. |
Returns:
The type.
- Type
- Number
getW(index) → {Number}
- Source:
Gets the w value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
Returns:
The w value at a given index.
- Type
- Number
getX(index) → {Number}
- Source:
Gets the x value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
Returns:
The x value at a given index.
- Type
- Number
getY(index) → {Number}
- Source:
Gets the y value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
Returns:
The y value at a given index.
- Type
- Number
getZ(index) → {Number}
- Source:
Gets the z value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
Returns:
The z value at a given index.
- Type
- Number
setFromVector(index, v)
- Source:
Set the attribute value from a vector at a given index. The vector should have the same number of components as is the length of this attribute.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index at which to replace / set the value (is calculated as index * attributeLength). |
v |
Lore.Vector3f | A vector. |
setFromVectorArray(arr)
- Source:
Set the attribute values from vectors in an array.
Parameters:
| Name | Type | Description |
|---|---|---|
arr |
Array.<Lore.Vector3f> | An array containing vectors. The number of components of the vectors must have the same length as the attribute length specified. |
setW(index, value)
- Source:
Set the w value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
value |
Number | A number. |
setX(index, value)
- Source:
Set the x value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
value |
Number | A number. |
setY(index, value)
- Source:
Set the y value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
value |
Number | A number. |
setZ(index, value)
- Source:
Set the z value at a given index.
Parameters:
| Name | Type | Description |
|---|---|---|
index |
Number | The index. |
value |
Number | A number. |
update(gl)
- Source:
Update the attribute in order for changes to take effect.
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The WebGL rendering context. |