ShadowMap Class Reference

Implementation of the shadow map effect. More...

#include <shadowMap.hpp>

Inheritance diagram for ShadowMap:

Classes
class	EffectObject

Public Member Functions
	ShadowMap (const std::string &name, Scene *scene=0, Model *model=0, const glm::mat4 &modelMatrix=glm::mat4(1))
virtual	~ShadowMap ()
void	draw () const
void	reset ()
void	update (double deltaT)
void	setShader (Shader *val)
glm::mat4	getDepthMVP () const
glm::mat4	getDepthBiasMVP () const
GLuint	getDepthTexture () const
Public Member Functions inherited from Light
	Light (const std::string &name, Scene *scene=0, Model *model=0, const glm::mat4 &modelMatrix=glm::mat4(1))
	Construct new light. More...
virtual	~Light ()
glm::vec3	getPower () const
glm::vec3	getDiffuse () const
glm::vec3	getAmbient () const
glm::vec3	getSpecular () const
glm::vec3	getPosition () const
void	setPower (const glm::vec3 &val)
void	setDiffuse (const glm::vec3 &val)
void	setAmbient (const glm::vec3 &val)
void	setSpecular (const glm::vec3 &val)
Public Member Functions inherited from SceneObject
	SceneObject (std::shared_ptr< SceneObject > &effectParent, const glm::mat4 &modelMatrix=glm::mat4(1))
	SceneObject (const std::string &name, Scene *scene=0, Model *model=0, const glm::mat4 &modelMatrix=glm::mat4(1))
virtual	~SceneObject ()
Model *	getModel () const
Shader *	getShader () const
glm::mat4	getModelMatrix () const
glm::mat4	getGlobalModelMatrix () const
std::string	getName () const
std::shared_ptr< SceneObject >	getParent () const
void	setAnimationTime (double time)
bool	setAnimation (const Animation &anim)
bool	delChild (size_t idx)
bool	getChild (size_t idx, std::shared_ptr< SceneObject > &child) const
bool	addChild (std::shared_ptr< SceneObject > &child)
bool	remEffect (const std::string &name)
SceneObject *	getEffect (const std::string &name) const
bool	addEffect (const std::string &name, std::unique_ptr< SceneObject > &effect)
bool	doNotRender ()
bool	getIsVolSun ()
virtual bool	animate (double time)

Private Attributes
GLuint	frameBuffer
GLuint	depthTexture
glm::mat4	depthMVP
glm::mat4	depthBiasMVP

Additional Inherited Members
Public Types inherited from SceneObject
typedef std::vector< std::pair< double, glm::mat4 > >	Animation
Protected Attributes inherited from Light
glm::vec3	power
glm::vec3	diffuse
glm::vec3	ambient
glm::vec3	specular
Protected Attributes inherited from SceneObject
GLuint	vao
Scene *	scene
Model *	model
Shader *	shader
glm::mat4	modelMatrix
std::string	name
std::weak_ptr< SceneObject >	parent
std::vector< std::shared_ptr< SceneObject > >	childs
std::map< std::string, std::unique_ptr< SceneObject > >	effectChilds
size_t	animIDX
Animation	animation
bool	norender
bool	isVolSun

Detailed Description

Implementation of the shadow map effect.

Author

Adam

The scene is being rendered from the light source into a FrameBuffer, which has a texture attached to it. The texture will contain at each position the distance from the light source. When rendering the scene using the camera, the same distance is computed and compared with the one in the texture. If it is less, then the fragment is in shadow. To improve the quality of the shadows, PCF is being used. This is achived by using sampler2Dshadow in the fragment shader. The comparison must be enabled in texture parameters. To requesting a value from the sampler2Dshadow, the x and y texture coordinates and the light distance in the z are given. The sampler will compare also neighboring texels and gives back a value between 0 and 1, the ratio of the texels, which were less then the requested z.

See also

http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-16-shadow-mapping/

Constructor & Destructor Documentation

ShadowMap::ShadowMap	(	const std::string &	name,
		Scene *	scene = 0,
		Model *	model = 0,
		const glm::mat4 &	modelMatrix = glm::mat4(1)
	)

ShadowMap::~ShadowMap ( )

virtual

Member Function Documentation

void ShadowMap::draw ( ) const

virtual

Reimplemented from SceneObject.

glm::mat4 ShadowMap::getDepthBiasMVP ( ) const

inline

glm::mat4 ShadowMap::getDepthMVP ( ) const

inline

GLuint ShadowMap::getDepthTexture ( ) const

inline

void ShadowMap::reset ( )

virtual

Todo:

Add instanced effect for shadow map.

Reimplemented from SceneObject.

void ShadowMap::setShader ( Shader *  val )

virtual

Reimplemented from SceneObject.

void ShadowMap::update ( double  deltaT )

virtual

Reimplemented from SceneObject.

Member Data Documentation

glm::mat4 ShadowMap::depthBiasMVP

private

glm::mat4 ShadowMap::depthMVP

private

GLuint ShadowMap::depthTexture

private

GLuint ShadowMap::frameBuffer

private

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

• C:/Users/FLx/Selektron/include/shadowMap.hpp
• C:/Users/FLx/Selektron/src/shadowMap.cpp