Target Class Reference
[Advanced]

Offscreen render location backed by a texture. More...

#include <Target.hpp>

Inheritance diagram for Target:

List of all members.

Public Member Functions
	Target (const Tag &tag)
virtual void	attach ()
virtual int	getSize () const
string	toString () const
Protected Member Functions
void	associate ()
Private Attributes
Texture2D *	texture
string	link

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Detailed Description

Offscreen render location backed by a texture.

Attaches itself to a color attachment of a Framebuffer. When the framebuffer is active, any rendering done to that attachment will be stored in the Texture referenced by the target. Thus, results of one rendering pass can be referenced in a later one.

Multiple targets can be added to one framebuffer. The framebuffer will assign them sequential indices ranging from 0 to GL_MAX_COLOR_ATTACHMENTS. The built-in (but deprecated) gl_FragData array references these attachments directly, but Bind can be used to assign user-defined out variables to the attachments.

XML Name

• target

XML Attributes

name	User-defined name that can be referenced by other nodes.
link	Name of the texture that backs the render target.

XML Example

   <texture name="layer0" >
   <texture name="layer1" >
     <framebuffer>
       <target link="layer0" />
       <target link="layer1" />
     </framebuffer>
   </texture>
   </texture>
 

Notes

• If name is not set explicity it will be set to link.

See also:

Framebuffer

Attachment

Bind

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Constructor & Destructor Documentation

Target

(

const Tag &

tag

)

Initializes the link and name attributes.

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Member Function Documentation

void associate

(

)

[protected, virtual]

Finds the framebuffer and texture to use.

Exceptions:

	NodeException	if cannot find texture with correct name.
	NodeException	from Attachment::associate().

Reimplemented from Attachment.

void attach

(

)

[virtual]

Attaches the target's texture to the framebuffer.

Note:

Assumes the framebuffer is already bound.

Implements Attachment.

int getSize

(

)

const [inline, virtual]

Returns:

Width of the texture backing the render target.

string toString

(

)

const [virtual]

Returns:

String comprised of the object's name and attributes.

Reimplemented from Attachment.

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The documentation for this class was generated from the following files:

• Target.hpp
• Target.cpp