Vp::GridObject

#include "Viewport/entity/GridObject.h"

Inherits from Vp::GameObject, Vp::Entity

Public Functions

	Name
	GridObject()
virtual void	prepareRenderContext(RenderContext & context, const DisplayOptions & displayOptions) override
virtual void	render(const glm::mat4 & model, const glm::mat4 & view, const glm::mat4 & projection, const RenderContext & context) override<br>IMPLEMENTATION NOTE: Derived entity classes should expect a certain kind of shader and be able to directly static cast to it.
void	setReferenceSpace(const glm::mat4 & referenceSpace, const glm::mat4 & referenceSpaceInv)

Protected Functions

	Name
void	updateGridShader()

Public Attributes

	Name
bool	isStandard
const float *	m_axisXColor
const float *	m_axisYColor
const float *	m_axisZColor
float	m_grid1FadeEnd
float	m_grid1FadeStart
float	m_grid2FadeEnd
float	m_grid2FadeStart
const float *	m_gridColor
float	m_gridSize
float	m_gridStrength
float	m_lineWidth
glm::mat4	m_modelMatrixInv
bool	m_showGrid
bool	m_showXAxis
bool	m_showYAxis
bool	m_showZAxis

Additional inherited members

Public Functions inherited from Vp::GameObject

	Name
	GameObject() =default<br>Creates an empty GameObject.
	GameObject(Core::Mesh * mesh, ObjectShader * shader)
virtual void	dispose() override
virtual void	update(Scene & scene) override

Public Attributes inherited from Vp::GameObject

	Name
Core::Mesh *	m_mesh
float	m_opacity

Public Classes inherited from Vp::Entity

	Name
struct	RenderContext

Public Types inherited from Vp::Entity

	Name
enum class	RenderType { NORMAL, CUSTOM, SILHOUETTE}

Public Functions inherited from Vp::Entity

	Name
	Entity()
virtual	~Entity() =default
RenderContext	createRenderContext(const DisplayOptions & displayOptions)
virtual void	dispose() =0
DisplayType	getDisplayType() const
glm::vec3	getHighlightColor() const
bool	isHighlighted() const
virtual void	onSceneAdd(Scene & scene)<br>Called when the entity is added to a scene.
virtual void	onSceneRemove(Scene & scene)<br>Called when the entity is removed from a scene.
void	setDisplayType(DisplayType type)
void	setHighlightColor(glm::vec3 highlightColor)
void	setHighlighted(bool highlight)
virtual void	update(Scene & scene) =0

Public Attributes inherited from Vp::Entity

	Name
bool	m_backFaceCull
unsigned int	m_explicitTransparencyOrder <br>Explicit order for ordered transparency.
bool	m_highlight <br>Whether to paint this entity with an outline, can be used for selection or just highlighting.
glm::vec3	m_highlightColor
bool	m_highlightUseDepth <br>Whether the highlight outline should respect the scene's depth buffer.
bool	m_ignoreReferenceSpace <br>When true, the "global"/"reference space" model matrix passed to viewport drawing methods is ignored.
bool	m_ignoreUserClipping <br>Whether to ignore user clip planes defined in DisplayOptions.
glm::mat4	m_lastModelMatrix <br>Potentially modifed model matrix last passed to the shader.
glm::mat4	m_modelMatrix <br>Model "world" transformation of the entity.
glm::mat4	m_modMatrix <br>Modification transformation, precedes any other transformations, modifies entity vertex data as if the modified data came directly from a source (model file).
bool	m_opaque
bool	m_selectable <br>Whether this entity should be written into the selection stencil buffer.
int	m_selectionId <br>Id of the object, -1 if not assigned, for selection purposes.
Shader *	m_shader
bool	m_visible
bool	m_wboit <br>Whether this entity should be rendered using order independent transparency, relevant if using a shader that supports wboit.
int	m_wboitFunc <br>Index of the weight function to be used in wboit.

Protected Attributes inherited from Vp::Entity

	Name
DisplayType	m_displayType

Public Functions Documentation

function GridObject

GridObject()

function prepareRenderContext

virtual void prepareRenderContext(
    RenderContext & context,
    const DisplayOptions & displayOptions
) override

Reimplements: Vp::GameObject::prepareRenderContext

function render

virtual void render(
    const glm::mat4 & model,
    const glm::mat4 & view,
    const glm::mat4 & projection,
    const RenderContext & context
) override

IMPLEMENTATION NOTE: Derived entity classes should expect a certain kind of shader and be able to directly static cast to it.

Parameters:

• model Implicit model matrix, multiplies the entity's model transform from the left.
• view View matrix
• projection Projection matrix
• context Additional per-instance rendering parameters generated by createRenderContext() or prepareRenderContext().

Reimplements: Vp::GameObject::render

Currently there is no error checking and wrongly passed shader type will CAUSE UNDEFINED BEHAVIOUR!

Using dynamic casts instead might be undesirable (slow) here (this might just be a premature optimalization) Generally the shader passed to this method is the m_shader of this entity. However we need functionality that allows us to change the shader temporarily (like for drawing silhouettes) Because of this the shader can also sometimes be something else, usually some derived type of the one the entity expects. I couldn't find a way to inform what kinds of shaders an entity is able to use in its render methods. The type of the shader must be the base Shader class and so some kind of casting must occur.

Another option could be to use some kind of a typeid/enum system that tells us what type a shader is (rather than use dynamic cast). But that approach ignores inheritance which we need and having multiple types of shaders and entity member variable seems very inflexible.

The true elegant solution probably doesn't involve inheritance at all and rather uses composition, together with an ECS or something. But it was decided to not dive into that realm and so we are stuck with this seemingly simple but not very flexible inheritance structure.

function setReferenceSpace

void setReferenceSpace(
    const glm::mat4 & referenceSpace,
    const glm::mat4 & referenceSpaceInv
)

Protected Functions Documentation

function updateGridShader

void updateGridShader()

Public Attributes Documentation

variable isStandard

bool isStandard {true};

variable m_axisXColor

const float * m_axisXColor;

variable m_axisYColor

const float * m_axisYColor;

variable m_axisZColor

const float * m_axisZColor;

variable m_grid1FadeEnd

float m_grid1FadeEnd {0.4f};

variable m_grid1FadeStart

float m_grid1FadeStart {0.0f};

variable m_grid2FadeEnd

float m_grid2FadeEnd {1.0f};

variable m_grid2FadeStart

float m_grid2FadeStart {0.1f};

variable m_gridColor

const float * m_gridColor;

variable m_gridSize

float m_gridSize {1.0f};

variable m_gridStrength

float m_gridStrength {0.5f};

variable m_lineWidth

float m_lineWidth {1.0f};

variable m_modelMatrixInv

glm::mat4 m_modelMatrixInv {1.f};

variable m_showGrid

bool m_showGrid = true;

variable m_showXAxis

bool m_showXAxis = true;

variable m_showYAxis

bool m_showYAxis = false;

variable m_showZAxis

bool m_showZAxis = true;

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Updated on 2026-09-11 at 21:24:25 +0000