graphic

package
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 Go to latest Published: Feb 28, 2024 License: BSD-2-Clause Imports: 8 Imported by: 4

Documentation

Overview

Package graphic implements scene objects which have a graphic representation.

Index

Constants

View Source 
const MaxBoneInfluencers = 4

MaxBoneInfluencers is the maximum number of bone influencers per vertex.

Variables

This section is empty.

Functions

This section is empty.

Types

type Graphic 

type Graphic struct {
	core.Node // Embedded Node

	ShaderDefines gls.ShaderDefines // Graphic-specific shader defines
	// contains filtered or unexported fields
}

Graphic is a Node which has a visible representation in the scene. It has an associated geometry and one or more materials. It is the base type used by other graphics such as lines, line_strip, points and meshes.

func NewGraphic 

func NewGraphic(igr IGraphic, igeom geometry.IGeometry, mode uint32) *Graphic

NewGraphic creates and returns a pointer to a new graphic object with the specified geometry and OpenGL primitive. The created graphic object, though, has not materials.

func (*Graphic) AddGroupMaterial 

func (gr *Graphic) AddGroupMaterial(igr IGraphic, imat material.IMaterial, gindex int)

AddGroupMaterial adds a material for the specified geometry group.

func (*Graphic) AddMaterial 

func (gr *Graphic) AddMaterial(igr IGraphic, imat material.IMaterial, start, count int)

AddMaterial adds a material for the specified subset of vertices. If the material applies to all vertices, start and count must be 0.

func (*Graphic) BoundingBox 

func (gr *Graphic) BoundingBox() math32.Box3

BoundingBox recursively calculates and returns the bounding box containing this node and all its children.

func (*Graphic) CalculateMatrices 

func (gr *Graphic) CalculateMatrices(gs *gls.GLS, rinfo *core.RenderInfo)

CalculateMatrices calculates the model view and model view projection matrices.

func (*Graphic) ClearMaterials 

func (gr *Graphic) ClearMaterials()

ClearMaterials removes all the materials from this Graphic.

func (*Graphic) Clone 

func (gr *Graphic) Clone() core.INode

Clone clones the graphic and satisfies the INode interface. It should be called by Clone() implementations of IGraphic. Note that the topmost implementation calling this method needs to call clone.SetIGraphic(igraphic) after calling this method.

func (*Graphic) Cullable 

func (gr *Graphic) Cullable() bool

Cullable satisfies the IGraphic interface and returns the cullable state of this graphic.

func (*Graphic) Dispose 

func (gr *Graphic) Dispose()

Dispose overrides the embedded Node Dispose method.

func (*Graphic) GetGeometry 

func (gr *Graphic) GetGeometry() *geometry.Geometry

GetGeometry satisfies the IGraphic interface and returns a pointer to the geometry associated with this graphic.

func (*Graphic) GetGraphic 

func (gr *Graphic) GetGraphic() *Graphic

GetGraphic satisfies the IGraphic interface and returns pointer to the base Graphic.

func (*Graphic) GetMaterial 

func (gr *Graphic) GetMaterial(vpos int) material.IMaterial

GetMaterial returns the material associated with the specified vertex position.

func (*Graphic) IGeometry 

func (gr *Graphic) IGeometry() geometry.IGeometry

IGeometry satisfies the IGraphic interface and returns a pointer to the IGeometry associated with this graphic.

func (*Graphic) Init 

func (gr *Graphic) Init(igr IGraphic, igeom geometry.IGeometry, mode uint32) *Graphic

Init initializes a Graphic type embedded in another type with the specified geometry and OpenGL mode.

func (*Graphic) Materials 

func (gr *Graphic) Materials() []GraphicMaterial

Materials returns slice with this graphic materials.

func (*Graphic) ModelMatrix 

func (gr *Graphic) ModelMatrix() *math32.Matrix4

ModelViewMatrix returns the last cached model view matrix for this graphic.

func (*Graphic) ModelViewMatrix 

func (gr *Graphic) ModelViewMatrix() *math32.Matrix4

ModelViewMatrix returns the last cached model view matrix for this graphic.

func (*Graphic) ModelViewProjectionMatrix 

func (gr *Graphic) ModelViewProjectionMatrix() *math32.Matrix4

ModelViewProjectionMatrix returns the last cached model view projection matrix for this graphic.

func (*Graphic) RenderOrder 

func (gr *Graphic) RenderOrder() int

RenderOrder returns the render order of the object.

func (*Graphic) Renderable 

func (gr *Graphic) Renderable() bool

Renderable satisfies the IGraphic interface and returns the renderable state of this graphic.

func (*Graphic) SetCullable 

func (gr *Graphic) SetCullable(state bool)

SetCullable satisfies the IGraphic interface and sets the cullable state of this Graphic (default = true).

func (*Graphic) SetIGraphic 

func (gr *Graphic) SetIGraphic(igr IGraphic)

SetIGraphic sets the IGraphic on all this Graphic's GraphicMaterials.

func (*Graphic) SetRenderOrder 

func (gr *Graphic) SetRenderOrder(order int)

SetRenderOrder sets the render order of the object. All objects have renderOrder of 0 by default. To render before renderOrder 0 set a lower renderOrder e.g. -1. To render after renderOrder 0 set a higher renderOrder e.g. 1

func (*Graphic) SetRenderable 

func (gr *Graphic) SetRenderable(state bool)

SetRenderable satisfies the IGraphic interface and sets the renderable state of this Graphic (default = true).

type GraphicMaterial 

type GraphicMaterial struct {
	// contains filtered or unexported fields
}

GraphicMaterial specifies the material to be used for a subset of vertices from the Graphic geometry A Graphic object has at least one GraphicMaterial.

func (*GraphicMaterial) IGraphic 

func (grmat *GraphicMaterial) IGraphic() IGraphic

IGraphic returns the graphic associated with the GraphicMaterial.

func (*GraphicMaterial) IMaterial 

func (grmat *GraphicMaterial) IMaterial() material.IMaterial

IMaterial returns the material associated with the GraphicMaterial.

func (*GraphicMaterial) Render 

func (grmat *GraphicMaterial) Render(gs *gls.GLS, rinfo *core.RenderInfo)

Render is called by the renderer to render this graphic material.

type IGraphic 

type IGraphic interface {
	core.INode
	GetGraphic() *Graphic
	GetGeometry() *geometry.Geometry
	IGeometry() geometry.IGeometry
	SetRenderable(bool)
	Renderable() bool
	SetCullable(bool)
	Cullable() bool
	RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)
}

IGraphic is the interface for all Graphic objects.

type LineStrip 

type LineStrip struct {
	Graphic // Embedded graphic object
	// contains filtered or unexported fields
}

LineStrip is a Graphic which is rendered as a collection of connected lines.

func NewLineStrip 

func NewLineStrip(igeom geometry.IGeometry, imat material.IMaterial) *LineStrip

NewLineStrip creates and returns a pointer to a new LineStrip graphic with the specified geometry and material.

func (*LineStrip) RenderSetup 

func (l *LineStrip) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup is called by the engine before drawing this geometry.

type Lines 

type Lines struct {
	Graphic // Embedded graphic object
	// contains filtered or unexported fields
}

Lines is a Graphic which is rendered as a collection of independent lines.

func NewLines 

func NewLines(igeom geometry.IGeometry, imat material.IMaterial) *Lines

NewLines returns a pointer to a new Lines object.

func (*Lines) Init 

func (l *Lines) Init(igeom geometry.IGeometry, imat material.IMaterial)

Init initializes the Lines object and adds the specified material.

func (*Lines) RenderSetup 

func (l *Lines) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup is called by the engine before drawing this geometry.

type Mesh 

type Mesh struct {
	Graphic // Embedded graphic
	// contains filtered or unexported fields
}

Mesh is a Graphic with uniforms for the model, view, projection, and normal matrices.

func NewMesh 

func NewMesh(igeom geometry.IGeometry, imat material.IMaterial) *Mesh

NewMesh creates and returns a pointer to a mesh with the specified geometry and material. If the mesh has multi materials, the material specified here must be nil and the individual materials must be add using "AddMaterial" or AddGroupMaterial".

func (*Mesh) AddGroupMaterial 

func (m *Mesh) AddGroupMaterial(imat material.IMaterial, gindex int)

AddGroupMaterial adds a material for the specified geometry group.

func (*Mesh) AddMaterial 

func (m *Mesh) AddMaterial(imat material.IMaterial, start, count int)

AddMaterial adds a material for the specified subset of vertices.

func (*Mesh) Clone 

func (m *Mesh) Clone() core.INode

Clone clones the mesh and satisfies the INode interface.

func (*Mesh) Init 

func (m *Mesh) Init(igeom geometry.IGeometry, imat material.IMaterial)

Init initializes the Mesh and its uniforms.

func (*Mesh) RenderSetup 

func (m *Mesh) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup is called by the engine before drawing the mesh geometry It is responsible to updating the current shader uniforms with the model matrices.

func (*Mesh) SetMaterial 

func (m *Mesh) SetMaterial(imat material.IMaterial)

SetMaterial clears all materials and adds the specified material for all vertices.

type Points 

type Points struct {
	Graphic // Embedded graphic
	// contains filtered or unexported fields
}

Points represents a geometry containing only points

func NewPoints 

func NewPoints(igeom geometry.IGeometry, imat material.IMaterial) *Points

NewPoints creates and returns a graphic points object with the specified geometry and material.

func (*Points) RenderSetup 

func (p *Points) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup is called by the engine before rendering this graphic.

type RiggedMesh 

type RiggedMesh struct {
	*Mesh // Embedded mesh
	// contains filtered or unexported fields
}

RiggedMesh is a Mesh associated with a skeleton.

func NewRiggedMesh 

func NewRiggedMesh(mesh *Mesh) *RiggedMesh

NewRiggedMesh returns a new rigged mesh.

func (*RiggedMesh) RenderSetup 

func (rm *RiggedMesh) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup is called by the renderer before drawing the geometry.

func (*RiggedMesh) SetSkeleton 

func (rm *RiggedMesh) SetSkeleton(sk *Skeleton)

SetSkeleton sets the skeleton used by the rigged mesh.

func (*RiggedMesh) Skeleton 

func (rm *RiggedMesh) Skeleton() *Skeleton

SetSkeleton returns the skeleton used by the rigged mesh.

type Skeleton 

type Skeleton struct {
	// contains filtered or unexported fields
}

Skeleton contains armature information.

func NewSkeleton 

func NewSkeleton() *Skeleton

NewSkeleton creates and returns a pointer to a new Skeleton.

func (*Skeleton) AddBone 

func (sk *Skeleton) AddBone(node *core.Node, inverseBindMatrix *math32.Matrix4)

AddBone adds a bone to the skeleton along with an optional inverseBindMatrix.

func (*Skeleton) BoneMatrices 

func (sk *Skeleton) BoneMatrices(invMat *math32.Matrix4) []math32.Matrix4

BoneMatrices calculates and returns the bone world matrices to be sent to the shader.

func (*Skeleton) Bones 

func (sk *Skeleton) Bones() []*core.Node

Bones returns the list of bones in the skeleton.

type Skybox 

type Skybox struct {
	Graphic // embedded graphic object
	// contains filtered or unexported fields
}

Skybox is the Graphic that represents a skybox.

func NewSkybox 

func NewSkybox(data SkyboxData) (*Skybox, error)

NewSkybox creates and returns a pointer to a Skybox with the specified textures.

func (*Skybox) RenderSetup 

func (skybox *Skybox) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup is called by the engine before drawing the skybox geometry It is responsible to updating the current shader uniforms with the model matrices.

type SkyboxData 

type SkyboxData struct {
	DirAndPrefix string
	Extension    string
	Suffixes     [6]string
}

SkyboxData contains the data necessary to locate the textures for a Skybox in a concise manner.

type Sprite 

type Sprite struct {
	Graphic // Embedded graphic
	// contains filtered or unexported fields
}

Sprite is a potentially animated image positioned in space that always faces the camera.

func NewSprite 

func NewSprite(width, height float32, imat material.IMaterial) *Sprite

NewSprite creates and returns a pointer to a sprite with the specified dimensions and material

func (*Sprite) RenderSetup 

func (s *Sprite) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo)

RenderSetup sets up the rendering of the sprite.

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