proland::TileSamplerZ::State Class Reference

A state object to share the readback managers between all TileSamplerZ instances with the same tile storage. More...

List of all members.

Public Member Functions
	State (ptr< GPUTileStorage > storage)
	Creates a new State for the given tile storage.
Public Attributes
ptr< GPUTileStorage >	storage
	The tile storage for which this State is built.
ptr< FrameBuffer >	fbo
	Framebuffer object used to compute zmin and zmax of tiles.
BufferId	readBuffer
	Buffer of FBO used to read back the computed zmin and zmax values.
ptr< Program >	minmaxProg
	The custom "mipmapping" program used to compute min and max elevation values over a tile.
ptr< ReadbackManager >	tileReadback
	The readback manager used to perform asynchronous readbacks.
std::set< TreeZ *, TreeZSort >	needReadback
	The set of texture tile that need to be read back.
GPUTileStorage::GPUSlot *	cameraSlot
	The slot of storage corresponding to the quad below the camera.
vec2i	cameraOffset
	Relative offset in cameraSlot of the pixel under the camera.
unsigned int	lastFrame
	The last frame for which a readback was performed.

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Detailed Description

A state object to share the readback managers between all TileSamplerZ instances with the same tile storage.

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Constructor & Destructor Documentation

proland::TileSamplerZ::State::State

(

ptr< GPUTileStorage >

storage

)

Creates a new State for the given tile storage.

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Member Data Documentation

vec2i proland::TileSamplerZ::State::cameraOffset

Relative offset in cameraSlot of the pixel under the camera.

The value of this pixel is readback into TerrainNode::groundHeightAtCamera.

GPUTileStorage::GPUSlot* proland::TileSamplerZ::State::cameraSlot

The slot of storage corresponding to the quad below the camera.

ptr<FrameBuffer> proland::TileSamplerZ::State::fbo

Framebuffer object used to compute zmin and zmax of tiles.

unsigned int proland::TileSamplerZ::State::lastFrame

The last frame for which a readback was performed.

This is used to avoid doing more readbacks per frame than specified in the readback managers, when several TileSamplerZ sharing the same State are used.

ptr<Program> proland::TileSamplerZ::State::minmaxProg

The custom "mipmapping" program used to compute min and max elevation values over a tile.

std::set<TreeZ*, TreeZSort> proland::TileSamplerZ::State::needReadback

The set of texture tile that need to be read back.

BufferId proland::TileSamplerZ::State::readBuffer

Buffer of FBO used to read back the computed zmin and zmax values.

ptr<GPUTileStorage> proland::TileSamplerZ::State::storage

The tile storage for which this State is built.

ptr<ReadbackManager> proland::TileSamplerZ::State::tileReadback

The readback manager used to perform asynchronous readbacks.