molecular::gfx::DrawTerrain Class Reference

Draw heightmap terrain. More...

#include <DrawTerrain.h>

Inheritance diagram for molecular::gfx::DrawTerrain:

Public Member Functions
template<class TRenderManager >
	DrawTerrain (TRenderManager &manager)
	~DrawTerrain ()
void	Execute () override
util::AxisAlignedBox	GetBounds () const override
void	SetHeightScale (float scale)
	Set scaling factor for heightmap values. More...
void	SetSize (float xSize, float ySize)
	Set drawing size of terrain. More...
void	SetHeightmapData (unsigned int width, unsigned int height, const float *data)
	Set heightmap data from array of floats. More...
void	SetTestData (unsigned int width, unsigned int height)
	Set heightmap to a 2D sine pattern for testing purposes. More...
void	SetLodFactor (float factor)
	Set factor which decides on the LOD level from distance to viewer. More...
void	SetPickingId (unsigned int id)
Public Member Functions inherited from molecular::gfx::DrawingFunction
template<class TRenderManager >
	DrawingFunction (TRenderManager &manager)
bool	BoundsChangedSince (int framecounter) const override
Public Member Functions inherited from molecular::gfx::RenderFunction
template<class TRenderManager >
	RenderFunction (TRenderManager &manager)
	RenderFunction (Scoping &scoping, RenderCmdSink &renderer)
virtual	~RenderFunction ()
virtual void	Set (Hash, bool)
	Set bool property with given name. More...

Additional Inherited Members
Protected Member Functions inherited from molecular::gfx::DrawingFunction
RenderCmdSink::Program *	PrepareProgram ()
Protected Member Functions inherited from molecular::gfx::RenderFunction
template<class T >
const T *	GetVariable (Hash key)
	Convenience shortcut to a variable pointer from the dynamic scope. More...
Protected Attributes inherited from molecular::gfx::DrawingFunction
ProgramProvider &	mProgramProvider
Protected Attributes inherited from molecular::gfx::RenderFunction
Scoping &	mScoping
RenderCmdSink &	mRenderer

Detailed Description

Draw heightmap terrain.

Divides the terrain into patches of size kPatchSize. Stores heightmap data in a texture that is evaluated in the vertex shader. Does level of detail calculations. Origin of the terrain mesh is the corner with heightmap index 0,0.

Todo:

Frustum culling for individual patches.

Skirting to hide seams between patches with different LOD.

Mipmapping. Right now, simple subsampling is used for lower LOD.

Constructor & Destructor Documentation

template<class TRenderManager >

molecular::gfx::DrawTerrain::DrawTerrain

(

TRenderManager &

manager

)

molecular::gfx::DrawTerrain::~DrawTerrain

(

)

Member Function Documentation

void molecular::gfx::DrawTerrain::Execute ( )

overridevirtual

Implements molecular::gfx::RenderFunction.

util::AxisAlignedBox molecular::gfx::DrawTerrain::GetBounds ( ) const

overridevirtual

Implements molecular::gfx::RenderFunction.

void molecular::gfx::DrawTerrain::SetHeightmapData	(	unsigned int	width,
		unsigned int	height,
		const float *	data
	)

Set heightmap data from array of floats.

void molecular::gfx::DrawTerrain::SetHeightScale ( float  scale )

inline

Set scaling factor for heightmap values.

Defaults to 1.

Todo:

Pass as parameter to SetHeightmapData().

void molecular::gfx::DrawTerrain::SetLodFactor ( float  factor )

inline

Set factor which decides on the LOD level from distance to viewer.

void molecular::gfx::DrawTerrain::SetPickingId ( unsigned int  id )

inline

void molecular::gfx::DrawTerrain::SetSize	(	float	xSize,
		float	ySize
	)

Set drawing size of terrain.

Terrain is always drawn with these dimensions, regardless of heightmap sample count.

void molecular::gfx::DrawTerrain::SetTestData	(	unsigned int	width,
		unsigned int	height
	)

Set heightmap to a 2D sine pattern for testing purposes.

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

• /home/travis/build/cmdrf/molecular/molecular-gfx/molecular/gfx/functions/DrawTerrain.h
• /home/travis/build/cmdrf/molecular/molecular-gfx/molecular/gfx/functions/DrawTerrain.cpp