plClipSpaceYMode Struct Reference

Specifies whether a projection matrix should flip the result along the Y axis or not. More...

#include <Declarations.h>

Public Types
enum	Enum { Regular , Flipped }

Static Public Attributes
static PL_FOUNDATION_DLL Enum	RenderToTextureDefault = plClipSpaceYMode::Regular
	Holds the platform default value for the clip space Y mode when rendering to a texture. This can be overridden by renderers to ensure the proper mode is used when they become active. On Windows/D3D this is initialized with 'Regular' by default on all other platforms/OpenGL it is initialized with 'Flipped' by default.

Detailed Description

Specifies whether a projection matrix should flip the result along the Y axis or not.

Mostly needed to compensate for differing Y texture coordinate conventions. Ie. on some platforms the Y texture coordinate origin is at the lower left and on others on the upper left. To prevent having to modify content to compensate, instead textures are simply flipped along Y on texture load. The same has to be done for all render targets, ie. content has to be rendered upside-down.

Use plClipSpaceYMode::RenderToTextureDefault when rendering to a texture, to always get the correct projection matrix.

Member Enumeration Documentation

Enum

enum plClipSpaceYMode::Enum

Enumerator
Regular	Creates a regular projection matrix.
Flipped	Creates a projection matrix that flips the image on its head. On platforms with different Y texture coordinate conventions, this can be used to compensate, by rendering images flipped to render targets.

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

• Code/Engine/Foundation/Math/Declarations.h
• Code/Engine/Foundation/Math/Implementation/Math.cpp