#include <rendertotexturecomponent.h>

Public Member Functions
	RenderToTextureComponentInstance (EntityInstance &entity, Component &resource)

virtual bool	init (utility::ErrorState &errorState) override

IRenderTarget &	getTarget ()

Texture2D &	getOutputTexture ()

void	draw ()

virtual bool	isSupported (nap::CameraComponentInstance &camera) const override

MaterialInstance &	getMaterialInstance ()

void	setPreserveAspect (bool preserveAspect)

Public Member Functions inherited from RenderableComponentInstance
	RenderableComponentInstance (EntityInstance &entity, Component &resource)

void	draw (IRenderTarget &renderTarget, VkCommandBuffer commandBuffer, const glm::mat4 &viewMatrix, const glm::mat4 &projectionMatrix)

void	setVisible (bool visible)

bool	isVisible () const

Public Member Functions inherited from ComponentInstance
	ComponentInstance (EntityInstance &entity, Component &resource)

virtual void	update (double deltaTime)

nap::EntityInstance *	getEntityInstance () const

nap::Component *	getComponent () const

template<typename T >
T *	getComponent () const

Public Member Functions inherited from Object
	Object ()

virtual	~Object ()

virtual void	onDestroy ()

	Object (Object &)=delete

Object &	operator= (const Object &)=delete

	Object (Object &&)=delete

Object &	operator= (Object &&)=delete

Protected Member Functions
virtual void	onDraw (IRenderTarget &renderTarget, VkCommandBuffer commandBuffer, const glm::mat4 &viewMatrix, const glm::mat4 &projectionMatrix) override

Additional Inherited Members
Static Public Member Functions inherited from Object
static bool	isIDProperty (rtti::Instance &object, const rtti::Property &property)

Public Attributes inherited from Object
std::string	mID
	Property: 'mID' unique name of the object. Used as an identifier by the system. More...

Description

Renders an effect directly to a texture using a custom material without having to define a render target or mesh. Use this component as a post process render step. This component manages its own render target and plane to render to. The plane is automatically scaled to fit the bounds of the render target.

Simply declare the component in json and call RenderToTextureComponentInstance::draw() in the render part of your application, in between nap::RenderService::beginHeadlessRecording() and nap::RenderService::endHeadlessRecording(). It is still possible to render this component through the render service, although only orthographic cameras are supported.

This component expects a material with a shader that contains both a model and projection matrix uniform. The view matrix uniform is optional. It will be set if found, otherwise bypassed. If you don't care about view space (camera) transformation, don't declare it in the shader. for example:

uniform nap
{
   uniform mat4 projectionMatrix;
   uniform mat4 modelMatrix;
} mvp;
...
void main(void)
{
   gl_Position = mvp.projectionMatrix * mvp.modelMatrix;
}

Inheritance diagram for RenderToTextureComponentInstance:

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Collaboration diagram for RenderToTextureComponentInstance:

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Constructor & Destructor Documentation

◆ RenderToTextureComponentInstance()

RenderToTextureComponentInstance	(	EntityInstance &	entity,
		Component &	resource
	)

Member Function Documentation

◆ draw()

void draw ( )

Renders the effect directly to texture using a custom material, without having to define a render target or mesh. Call this in your application render() call, in between nap::RenderService::beginHeadlessRecording() and nap::RenderService::endHeadlessRecording(). Do not call this function outside of a headless recording pass, ie: when rendering to a window. The result is rendered into the given output texture. Alternatively, you can use the render service to render this component, see onDraw()

◆ getMaterialInstance()

MaterialInstance& getMaterialInstance ( )

Returns: current material used when drawing the mesh.

◆ getOutputTexture()

Texture2D& getOutputTexture ( )

Returns: the output texture

◆ getTarget()

IRenderTarget& getTarget ( )

Returns: the render target that is used to perform the render step

◆ init()

virtual bool init ( utility::ErrorState & errorState )

overridevirtual

Initialize RenderToTextureComponentInstance based on the RenderToTextureComponent resource

Parameters

errorState should hold the error message when initialization fails

Returns: if the rendertotexturecomponentInstance initialized successfully

Reimplemented from RenderableComponentInstance.

◆ isSupported()

virtual bool isSupported ( nap::CameraComponentInstance & camera ) const

overridevirtual

Called by the Render Service. Only orthographic cameras are supported.

Returns: true if camera is orthographic

Reimplemented from RenderableComponentInstance.

◆ onDraw()

virtual void onDraw	(	IRenderTarget &	renderTarget,
		VkCommandBuffer	commandBuffer,
		const glm::mat4 &	viewMatrix,
		const glm::mat4 &	projectionMatrix
	)

overrideprotectedvirtual

Draws the effect full screen to the currently active render target, when the view matrix = identity.

Parameters

renderTarget	the target to render to.
commandBuffer	the currently active command buffer.
viewMatrix	often the camera world space location
projectionMatrix	often the camera projection matrix

Implements RenderableComponentInstance.

◆ setPreserveAspect()

void setPreserveAspect ( bool preserveAspect )

Sets whether to preserve the texture aspect ratio when rendering to the target

Public Member Functions

Protected Member Functions

Additional Inherited Members