ArrayBuffer

ArrayBuffer

new ArrayBuffer(gl, dataopt, usageopt)

Parameters:
Name Type Attributes Default Description
gl WebGLRenderingContext then webgl context this ArrayBuffer belongs to
data TypedArray | uint <optional>
 optional data to copy to buffer, or the size (in bytes)
usage GLenum <optional>
 GL_STATIC_DRAW the usage hint for this buffer.
Implements:
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Methods

attrib(name, size, type, normalizeopt)

Add attribute declaration for this buffer. Once attributes declared, the buffer can be linked to programs attributes using ArrayBuffer#attribPointer
Parameters:
Name Type Attributes Default Description
name string the name of the program's attribute
size uint the size of the attribute (3 for a vec3)
type GLenum the type of data (GL_FLOAT, GL_SHORT etc)
normalize boolean <optional>
 false indicate if the data must be normalized
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attribPointer(program)

Link given program attributes to this buffer. You should first declare attributes using ArrayBuffer#attrib before calling this method.
Parameters:
Name Type Description
program Program the nanogl Program
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bind()

Bind the underlying webgl buffer.
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data(array)

Fill webgl buffer with the given data. You can also pass a uint to allocate the buffer to the given size.
Parameters:
Name Type Description
array TypedArray | uint the data to send to the buffer, or a size.
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dispose()

Delete underlying webgl objects
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draw(mode, countopt, offsetopt)

Shortcut to gl.drawArrays
Parameters:
Name Type Attributes Default Description
mode GLenum the type of primitive to draw (GL_TRIANGLE, GL_POINTS etc)
count uint <optional>
 the number of vertices to draw (full buffer is used if omited)
offset uint <optional>
 0 the position of the first vertex to draw
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subData(array, offset)

Set a part of the buffer with the given data, starting a offset (in bytes)
Parameters:
Name Type Description
array typedArray the data to send to buffer
offset uint the offset in byte where the data will be written
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