WGLRakeRenderer Class Reference

Implementation of raking. More...

#include <WGLRakeRenderer.hpp>

Inheritance diagram for WGLRakeRenderer:

Collaboration diagram for WGLRakeRenderer:

Public Member Functions
	WGLRakeRenderer (WGLSceneRenderer &sr, Scene const &s)
	Construct a new WGLRakeRenderer object. More...
void	setActive () const override
	Set the WebGL state needed for the shader. More...
void	reset (WGLSceneRenderer &sr, Scene const &s)
	Resets the WGLRakeRenderer to a new initial state. More...
void	resize () override
	Resize to the resolution set for rake state in WGLContext. More...
void	rake (float x, float y, float period, float amplitude, float phase, GLint nails[1000])
	Compute a rake step. More...
void	draw (GLuint target_fbo=0)
	Draw the current raked stated to target_fbo. More...
void	drawToBuffer (void *buf, size_t length)
	Save the current rake state to a buffer. More...
void	swapBuffers ()
	Swap internal rake state buffers. More...

Detailed Description

Implementation of raking.

For rakes the data and rendering are not decoupled as Scene objects and WGLSceneRenderer objects are. This was a more simple approach which was also very beneficial for performance due to offloading to GPU.

Constructor & Destructor Documentation

WGLRakeRenderer()

WGLRakeRenderer::WGLRakeRenderer	(	WGLSceneRenderer &	sr,
		Scene const &	s
	)

Construct a new WGLRakeRenderer object.

Parameters

sr	WGLSceneRenderer used to render a color code image from Scene s
s	Scene to use as initial state.

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Member Function Documentation

draw()

void WGLRakeRenderer::draw

(

GLuint

target_fbo = 0

)

Draw the current raked stated to target_fbo.

The default 0 is the visible context in the frontend.

Parameters

target_fbo

Framebuffer to draw to.

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drawToBuffer()

void WGLRakeRenderer::drawToBuffer	(	void *	buf,
		size_t	length
	)

Save the current rake state to a buffer.

Used for screenshots.

Parameters

buf	Preallocated buffer to use.
length	Size of the buffer.

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rake()

void WGLRakeRenderer::rake	(	float	x,
		float	y,
		float	period,
		float	amplitude,
		float	phase,
		GLint	nails[1000]
	)

Compute a rake step.

For amplitude values greater than 0 this results in a wavy rake movement. curr_tex will be toggled afterwards so that the hidden color code buffers will be switched. The rake stroke strength is encoded by x and y though other directions than horizontal or vertical are not supported (yet).

Parameters

x	x-direction of the stroke
y	y-direction of the stroke
period	Period length of wavy movement.
amplitude	Amplitude of wavy movement.
phase	Phase shift of wavy movement.
nails	Rake representation. 1000 possible equally positioned tines with TRUE if the tine is present and FALSE otherwise.

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reset()

void WGLRakeRenderer::reset	(	WGLSceneRenderer &	sr,
		Scene const &	s
	)

Resets the WGLRakeRenderer to a new initial state.

Parameters

sr	WGLSceneRenderer used to render a color code image from Scene s
s	Scene to use as initial state.

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resize()

void WGLRakeRenderer::resize ( )

overridevirtual

Resize to the resolution set for rake state in WGLContext.

Implements WGLRenderer.

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setActive()

void WGLRakeRenderer::setActive ( ) const

overridevirtual

Set the WebGL state needed for the shader.

Implements WGLRenderer.

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swapBuffers()

void WGLRakeRenderer::swapBuffers

(

)

Swap internal rake state buffers.

This efficiently implements a one step undo.

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

• include/WGLRakeRenderer.hpp
• src/WGLRakeRenderer.cpp