gfx

package
v0.0.0-...-e77de60 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jan 23, 2020 License: Zlib Imports: 10 Imported by: 0

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Index

Constants

View Source 
const (
	ANCHOR_CENTER Anchor = 0x00
	ANCHOR_LEFT          = 0x01
	ANCHOR_RIGHT         = 0x02
	ANCHOR_UP            = 0x04
	ANCHOR_DOWN          = 0x08
)
View Source 
const MAX_BATCH_QUAD_SIZE = uint32(8 << 10)

~ 640k per-batch, 32k vertex, 8k quad

View Source 
const MAX_BATCH_VERTEX_SIZE = 4 * MAX_BATCH_QUAD_SIZE
View Source 
const STEP = 64
View Source 
const SharedIndexBufferSize uint16 = 0xFFFF

Variables

View Source 
var (
	White  = Color{0xFF, 0xFF, 0xFF, 0xFF}
	Black  = Color{0, 0, 0, 0xFF}
	LTGray = Color{0xCC, 0xCC, 0xCC, 0xFF}
	Gray   = Color{0x88, 0x88, 0x88, 0xFF}
	DKGray = Color{0x44, 0x44, 0x44, 0xFF}

	Red   = Color{0xFF, 0, 0, 0xFF}
	Green = Color{0, 0xFF, 0, 0xFF}
	Blue  = Color{0, 0, 0xFF, 0xFF}

	Cyan    = Color{0, 0xFF, 0xFF, 0xFF}
	Magenta = Color{0xFF, 00, 0xFF, 0xFF}
	Yellow  = Color{0xFF, 0xFF, 0x00, 0xFF}

	Transparent = Color{}
	Opaque      = Color{0xFF, 0xFF, 0xFF, 0xFF}
)
View Source 
var Context *context

global shared

View Source 
var P4C4 = []bk.VertexComp{
	{4, bk.AttrFloat, 0, 0},
	{4, bk.AttrUInt8, 16, 1},
}

format <x,y,u,v rgba>

View Source 
var PosTexColorVertexSize = unsafe.Sizeof(PosTexColorVertex{})
View Source 
var UInt16Size = unsafe.Sizeof(uint16(0))

Functions

func Destroy 

func Destroy()

func Flush 

func Flush() (num int)

func Init 

func Init(pixelRatio float32)

func OverlapAB 

func OverlapAB(a, b *AABB) bool

func PackSortId 

func PackSortId(z int16, b uint16) (sid uint32)

func UnpackSortId 

func UnpackSortId(sortId uint32) (z int16, b uint16)

Types

type AABB 

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

type Anchor 

type Anchor uint8

Anchor type

type Atlas 

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

A small struct to describe a group of sub-texture

func (*Atlas) AddItem 

func (at *Atlas) AddItem(x, y, w, h float32, name string, rotated bool)

func (*Atlas) GetByIndex 

func (at *Atlas) GetByIndex(index int) (tex SubTex, ok bool)

func (*Atlas) GetByName 

func (at *Atlas) GetByName(name string) (tex SubTex, ok bool)

func (*Atlas) Region 

func (at *Atlas) Region(ii int) Region

func (*Atlas) Size 

func (at *Atlas) Size(ii int) Size

type Batch 

type Batch struct {
	TextureId uint16

	VertexId uint16
	IndexId  uint16
	// contains filtered or unexported fields
}

* Batch 系统设计 对所有物体进行分类：静态和动态，静态物体使用稳定的batch系统，动态物体每次重新计算batch

静态： 使用稳定的batch面临的最大问题是，batch内存的物体的可见性问题。如果batch内的物体有的可见， 有的不可见（有可能是不再视野内，也有可能是主动隐藏）. 采用 unity 方案，只减少状态切换，不减少 drawcall 的做法， 实现比较简单（否则要面临修改VBO缓存的问题）。

动态： 动态Batch每次都需要重新构建，只要实现正确的合并算法即可。

暗示：在 sortkey 中提供一个字段 batch=0 (默认情况使用动态batch)，batch=1,2..N 的情况按batch值进行 分批处理。 优化：按照空间划分可以得到不同子空间的batch，可以在batch中再做一次筛选滤掉不可见的物体。

渲染： 静态系统，按照 batch-id 找到对应的batch数据，生成渲染命令 动态系统，直接合并数据并生成渲染命令

目前Batch实现只支持格式：pos_uv_color

type BatchContext 

type BatchContext struct {

	// batch-list
	BatchList [128]Batch
	// contains filtered or unexported fields
}

管理一或多个Batch实例 最多可以生成 128 个 Batch 分组 最多可以使用 8 个 VBO 缓存

type BatchObject 

type BatchObject interface {
	Fill(vertex []PosTexColorVertex)
	Size() int
}

type BatchRender 

type BatchRender struct {

	// batch context
	BatchContext
	// contains filtered or unexported fields
}

/ A Tex2D Batch TypeRender

func NewBatchRender 

func NewBatchRender(vsh, fsh string) *BatchRender

func (*BatchRender) Begin 

func (br *BatchRender) Begin(tex uint16, depth int16)

func (*BatchRender) Draw 

func (br *BatchRender) Draw(b BatchObject)

func (*BatchRender) End 

func (br *BatchRender) End()

func (*BatchRender) Flush 

func (br *BatchRender) Flush() (num int)

func (*BatchRender) SetCamera 

func (br *BatchRender) SetCamera(camera *Camera)

type BoundingBox 

type BoundingBox struct {
	Min f32.Vec2
	Max f32.Vec2
}

/ 可见性系统，以一个组件的形式呈现

type BoundingComp 

type BoundingComp struct {
	BoundingBox
}

/ 每个Entity只有一个可见性对象，如果它包含多个 RenderComp，那么求出一个最大面积 / 作为该对象的可见面积

func (*BoundingComp) Add 

func (bc *BoundingComp) Add(bb *BoundingBox)

合并两个矩形

func (*BoundingComp) SetBounding 

func (bc *BoundingComp) SetBounding(bb *BoundingBox)

func (*BoundingComp) Sub 

func (bc *BoundingComp) Sub(bb *BoundingBox)

减去一个矩形的贡献

type BoundingTable 

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

func (*BoundingTable) Comp 

func (bt *BoundingTable) Comp(entity engi.Entity) (bc *BoundingComp)

func (*BoundingTable) NewComp 

func (bt *BoundingTable) NewComp(entity engi.Entity) (bc *BoundingComp)

type Camera 

type Camera struct {
	Eye f32.Vec3
	// contains filtered or unexported fields
}

func (*Camera) Bounding 

func (c *Camera) Bounding() (left, top, right, bottom float32)

func (*Camera) Flow 

func (c *Camera) Flow(entity engi.Entity)

func (*Camera) InView 

func (c *Camera) InView(xf *Transform, size, gravity f32.Vec2) bool

func (*Camera) MoveBy 

func (c *Camera) MoveBy(dx, dy float32)

func (*Camera) MoveTo 

func (c *Camera) MoveTo(x, y float32)

func (*Camera) P 

func (c *Camera) P() (left, right, bottom, top float32)

func (*Camera) Position 

func (c *Camera) Position() (x, y float32)

func (*Camera) RotateBy 

func (c *Camera) RotateBy(d float32)

func (*Camera) RotateTo 

func (c *Camera) RotateTo(rt float32)

func (*Camera) Rotation 

func (c *Camera) Rotation() float32

func (*Camera) Scale 

func (c *Camera) Scale() (sx, sy float32)

func (*Camera) ScaleBy 

func (c *Camera) ScaleBy(dsx, dsy float32)

func (*Camera) ScaleTo 

func (c *Camera) ScaleTo(sx, sy float32)

func (*Camera) Scene2Screen 

func (c *Camera) Scene2Screen(x, y float32) (x1, y1 float32)

Scene2Screen converts (x,y) in game's world coordinate to screen coordinate.

func (*Camera) Screen 

func (c *Camera) Screen() (w, h float32)

func (*Camera) Screen2Scene 

func (c *Camera) Screen2Scene(x, y float32) (x1, y1 float32)

Screen2Scene converts (x,y) in screen coordinate to (x1,y1) in game's world coordinate.

func (*Camera) SetBound 

func (c *Camera) SetBound(left, top, right, bottom float32)

func (*Camera) SetDesiredViewport 

func (c *Camera) SetDesiredViewport(w, h float32)

func (*Camera) SetViewPort 

func (c *Camera) SetViewPort(w, h float32)

TODO:相机默认位置应该在屏幕中间

func (*Camera) View 

func (c *Camera) View() (x, y, w, h float32)

type CameraMode 

type CameraMode uint8
const (
	Perspective CameraMode = iota
	Orthographic
)

type Color 

type Color color.RGBA

func PMAColor 

func PMAColor(r, g, b, a uint8) Color

PMAColor returns a pre-multiplied alpha Color.

func PMAColorf 

func PMAColorf(r, g, b, a float32) Color

func U32Color 

func U32Color(v uint32) Color

Color value should follow byte-order: 0xAABBGGRR

func (Color) RGBA 

func (c Color) RGBA() (r, g, b, a uint32)

func (Color) U32 

func (c Color) U32() uint32

type CompRef 

type CompRef struct {
	Type int32
	*Transform
	*SpriteComp
}

func (CompRef) BatchId 

func (b CompRef) BatchId() uint16

func (CompRef) SetBatchId 

func (b CompRef) SetBatchId(id uint16)

func (CompRef) SetZOrder 

func (zo CompRef) SetZOrder(z int16)

func (CompRef) Z 

func (zo CompRef) Z() int16

type Mesh 

type Mesh struct {
	IndexId  uint16
	VertexId uint16

	FirstVertex uint16
	NumVertex   uint16

	FirstIndex uint16
	NumIndex   uint16
	// contains filtered or unexported fields
}

func (*Mesh) Delete 

func (m *Mesh) Delete()

func (*Mesh) SetIndex 

func (m *Mesh) SetIndex(v []uint16)

func (*Mesh) SetTexture 

func (m *Mesh) SetTexture(id uint16)

func (*Mesh) SetVertex 

func (m *Mesh) SetVertex(v []PosTexColorVertex)

func (*Mesh) Setup 

func (m *Mesh) Setup()

func (*Mesh) Update 

func (m *Mesh) Update()

type MeshComp 

type MeshComp struct {
	engi.Entity
	Mesh
	// contains filtered or unexported fields
}

func (*MeshComp) SetSize 

func (m *MeshComp) SetSize(width, height float32)

func (*MeshComp) SetVisible 

func (m *MeshComp) SetVisible(v bool)

func (*MeshComp) SetZOrder 

func (zo *MeshComp) SetZOrder(z int16)

func (*MeshComp) Size 

func (m *MeshComp) Size() (w, h float32)

func (*MeshComp) Z 

func (zo *MeshComp) Z() int16

type MeshRender 

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

func NewMeshRender 

func NewMeshRender(vsh, fsh string) *MeshRender

func (*MeshRender) Draw 

func (mr *MeshRender) Draw(m *Mesh, mat4 *f32.Mat4, depth int32)

draw

func (*MeshRender) Extract 

func (mr *MeshRender) Extract(visibleObjects []uint32)

extract render object

func (*MeshRender) SetCamera 

func (mr *MeshRender) SetCamera(camera *Camera)

type MeshRenderFeature 

type MeshRenderFeature struct {
	Stack *StackAllocator

	R *MeshRender
	// contains filtered or unexported fields
}

///

func (*MeshRenderFeature) Draw 

func (f *MeshRenderFeature) Draw(nodes RenderNodes)

func (*MeshRenderFeature) Extract 

func (f *MeshRenderFeature) Extract(v *View)

func (*MeshRenderFeature) Flush 

func (f *MeshRenderFeature) Flush()

func (*MeshRenderFeature) Register 

func (f *MeshRenderFeature) Register(rs *RenderSystem)

此处初始化所有的依赖

type MeshTable 

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

func NewMeshTable 

func NewMeshTable(cap int) *MeshTable

func (*MeshTable) Alive 

func (mt *MeshTable) Alive(entity engi.Entity) bool

func (*MeshTable) Comp 

func (mt *MeshTable) Comp(entity engi.Entity) (mc *MeshComp)

func (*MeshTable) Delete 

func (mt *MeshTable) Delete(entity engi.Entity)

func (*MeshTable) Destroy 

func (mt *MeshTable) Destroy()

func (*MeshTable) NewComp 

func (mt *MeshTable) NewComp(entity engi.Entity) (mc *MeshComp)

func (*MeshTable) Size 

func (mt *MeshTable) Size() (size, cap int)

type PosTexColorVertex 

type PosTexColorVertex struct {
	X, Y, U, V float32
	RGBA       uint32
}

vertex struct

type Region 

type Region struct {
	X1, Y1  float32
	X2, Y2  float32
	Rotated bool
}

type Render 

type Render interface {
	SetCamera(camera *Camera)
}

type RenderFeature 

type RenderFeature interface {
	Extract(v *View)
	Draw(nodes RenderNodes)
	Flush()
}

传入参数是经过可见性系统筛选后的 Entity，这是一个很小的数组，可以 直接传给各个 RenderFeature 来做可见性判断.

type RenderMesh 

type RenderMesh struct {
	*Mesh
	Matrix []float32
}

type RenderNodes 

type RenderNodes []SortObject

func (RenderNodes) Len 

func (nodes RenderNodes) Len() int

func (RenderNodes) Less 

func (nodes RenderNodes) Less(i, j int) bool

func (RenderNodes) Swap 

func (nodes RenderNodes) Swap(i, j int)

type RenderObject 

type RenderObject struct {
	engi.Entity
	Size    f32.Vec2
	Center  f32.Vec2
	ZOrder  int16
	BatchId uint16
}

Shared properties by most render object.

type RenderSystem 

type RenderSystem struct {
	MainCamera Camera
	View

	// visibility test
	V VisibilitySystem

	// render-data
	TableList []interface{}

	// render
	RenderList []Render

	// feature knows how to use render-data and render
	FeatureList []RenderFeature
	// contains filtered or unexported fields
}

所有的Table和Render都在此管理 其它的 RenderFeature 在此提取依赖 这样的话， RenderSystem 就沦为一个管理 RenderFeature 和 Table 的地方 它们之间也会存在各种组合...

func NewRenderSystem 

func NewRenderSystem() (rs *RenderSystem)

func (*RenderSystem) Accept 

func (th *RenderSystem) Accept(rf RenderFeature) (index int)

func (*RenderSystem) Destroy 

func (th *RenderSystem) Destroy()

func (*RenderSystem) RegisterRender 

func (th *RenderSystem) RegisterRender(t RenderType, render Render)

register type-render

func (*RenderSystem) RequireTable 

func (th *RenderSystem) RequireTable(tables []interface{})

func (*RenderSystem) Update 

func (th *RenderSystem) Update(dt float32)

type RenderType 

type RenderType int32

type SRT 

type SRT struct {
	Scale    f32.Vec2
	Rotation float32
	Position f32.Vec2
}

type ShapeRender 

type ShapeRender struct {
}

func (*ShapeRender) DrawCircle 

func (sr *ShapeRender) DrawCircle()

func (*ShapeRender) DrawLine 

func (sr *ShapeRender) DrawLine()

func (*ShapeRender) DrawPolygon 

func (sr *ShapeRender) DrawPolygon()

func (*ShapeRender) DrawRect 

func (sr *ShapeRender) DrawRect()

func (*ShapeRender) DrawTriangle 

func (sr *ShapeRender) DrawTriangle()

type Size 

type Size struct {
	Width, Height float32
}

type SortObject 

type SortObject struct {
	SortId uint32
	Value  uint32
}

type Sprite 

type Sprite Tex2D

Sprite is Tex2D

type SpriteComp 

type SpriteComp struct {
	engi.Entity
	Sprite
	// contains filtered or unexported fields
}

SpriteComp & SpriteTable Usually, sprite can be rendered with a BatchRenderer

func (*SpriteComp) BatchId 

func (b *SpriteComp) BatchId() uint16

func (*SpriteComp) Color 

func (sc *SpriteComp) Color() Color

func (*SpriteComp) Flip 

func (sc *SpriteComp) Flip(flipX, flipY bool)

func (*SpriteComp) Gravity 

func (sc *SpriteComp) Gravity() (x, y float32)

func (*SpriteComp) SetBatchId 

func (b *SpriteComp) SetBatchId(id uint16)

func (*SpriteComp) SetColor 

func (sc *SpriteComp) SetColor(c Color)

func (*SpriteComp) SetGravity 

func (sc *SpriteComp) SetGravity(x, y float32)

func (*SpriteComp) SetSize 

func (sc *SpriteComp) SetSize(w, h float32)

func (*SpriteComp) SetSprite 

func (sc *SpriteComp) SetSprite(spt Sprite)

func (*SpriteComp) SetVisible 

func (sc *SpriteComp) SetVisible(v bool)

func (*SpriteComp) SetZOrder 

func (zo *SpriteComp) SetZOrder(z int16)

func (*SpriteComp) Size 

func (sc *SpriteComp) Size() (w, h float32)

func (*SpriteComp) Visible 

func (sc *SpriteComp) Visible() bool

func (*SpriteComp) Z 

func (zo *SpriteComp) Z() int16

type SpriteRenderFeature 

type SpriteRenderFeature struct {
	Stack *StackAllocator

	R *BatchRender
	// contains filtered or unexported fields
}

///

func (*SpriteRenderFeature) Draw 

func (f *SpriteRenderFeature) Draw(nodes RenderNodes)

func (*SpriteRenderFeature) Extract 

func (f *SpriteRenderFeature) Extract(v *View)

func (*SpriteRenderFeature) Flush 

func (f *SpriteRenderFeature) Flush()

func (*SpriteRenderFeature) Register 

func (f *SpriteRenderFeature) Register(rs *RenderSystem)

此处初始化所有的依赖

func (*SpriteRenderFeature) SetRender 

func (f *SpriteRenderFeature) SetRender(render *BatchRender)

func (*SpriteRenderFeature) SetTable 

func (f *SpriteRenderFeature) SetTable(st *SpriteTable, xt *TransformTable)

type SpriteTable 

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

func NewSpriteTable 

func NewSpriteTable(cap int) *SpriteTable

func (*SpriteTable) Alive 

func (st *SpriteTable) Alive(entity engi.Entity) bool

func (*SpriteTable) Comp 

func (st *SpriteTable) Comp(entity engi.Entity) (sc *SpriteComp)

func (*SpriteTable) Delete 

func (st *SpriteTable) Delete(entity engi.Entity)

func (*SpriteTable) Destroy 

func (st *SpriteTable) Destroy()

func (*SpriteTable) NewComp 

func (st *SpriteTable) NewComp(entity engi.Entity) (sc *SpriteComp)

func (*SpriteTable) NewCompX 

func (st *SpriteTable) NewCompX(entity engi.Entity, spt Tex2D) (sc *SpriteComp)

New SpriteComp with parameter

func (*SpriteTable) Size 

func (st *SpriteTable) Size() (size, cap int)

type StackAllocator 

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

// This is a stack allocator used for fast per step allocations.

func (*StackAllocator) Alloc 

func (stack *StackAllocator) Alloc(size int32) (ptr unsafe.Pointer)

Alloc alloc memory on the stack.

func (*StackAllocator) Free 

func (stack *StackAllocator) Free(size int32)

Free frees memory on the stack, it should pair with Alloc.

type SubTex 

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

SubTexture = (atlas-id << 16) + SubTexture-id

func (SubTex) Id 

func (tex SubTex) Id() (atlas, index int)

func (SubTex) Region 

func (tex SubTex) Region() Region

func (SubTex) Size 

func (tex SubTex) Size() Size

func (SubTex) Tex 

func (tex SubTex) Tex() uint16

type Tex2D 

type Tex2D interface {
	// return texture id
	Tex() uint16
	// uv
	Region() Region
	// size
	Size() Size
}

Tex2D is a Texture or a SubTexture

func NewTex 

func NewTex(id uint16) Tex2D

type TexManager 

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

Texture Resource Manager 

var R *TexManager

TextureManager as a global variable.

func (*TexManager) Atlas 

func (tm *TexManager) Atlas(name string) (at *Atlas)

func (*TexManager) Delete 

func (tm *TexManager) Delete(name string)

func (*TexManager) NewAtlas 

func (tm *TexManager) NewAtlas(id uint16, size int, name string) (at *Atlas)

纹理图集的管理是以纹理为单位.

type TextComp 

type TextComp struct {
	engi.Entity
	// contains filtered or unexported fields
}

TextSprite

func (*TextComp) BatchId 

func (b *TextComp) BatchId() uint16

func (*TextComp) Color 

func (tc *TextComp) Color() Color

func (*TextComp) Font 

func (tc *TextComp) Font() font.Font

func (*TextComp) FontSize 

func (tc *TextComp) FontSize() float32

func (*TextComp) Gravity 

func (tc *TextComp) Gravity() (x, y float32)

func (*TextComp) SetBatchId 

func (b *TextComp) SetBatchId(id uint16)

func (*TextComp) SetColor 

func (tc *TextComp) SetColor(color Color)

func (*TextComp) SetFont 

func (tc *TextComp) SetFont(fnt font.Font)

should have default font!!

func (*TextComp) SetFontSize 

func (tc *TextComp) SetFontSize(sz float32)

func (*TextComp) SetGravity 

func (tc *TextComp) SetGravity(x, y float32)

func (*TextComp) SetText 

func (tc *TextComp) SetText(text string)

func (*TextComp) SetVisible 

func (tc *TextComp) SetVisible(v bool)

func (*TextComp) SetZOrder 

func (zo *TextComp) SetZOrder(z int16)

func (*TextComp) Size 

func (tc *TextComp) Size() (w, h float32)

func (*TextComp) Text 

func (tc *TextComp) Text() string

func (*TextComp) Visible 

func (tc *TextComp) Visible() bool

func (*TextComp) Z 

func (zo *TextComp) Z() int16

type TextQuad 

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

type TextRenderFeature 

type TextRenderFeature struct {
	Stack *StackAllocator
	R     *BatchRender
	// contains filtered or unexported fields
}

func (*TextRenderFeature) Draw 

func (f *TextRenderFeature) Draw(nodes RenderNodes)

func (*TextRenderFeature) Extract 

func (f *TextRenderFeature) Extract(v *View)

func (*TextRenderFeature) Flush 

func (f *TextRenderFeature) Flush()

func (*TextRenderFeature) Register 

func (f *TextRenderFeature) Register(rs *RenderSystem)

此处初始化所有的依赖

type TextTable 

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

TextTable

func NewTextTable 

func NewTextTable(cap int) *TextTable

func (*TextTable) Alive 

func (tt *TextTable) Alive(entity engi.Entity) bool

func (*TextTable) Comp 

func (tt *TextTable) Comp(entity engi.Entity) (tc *TextComp)

func (*TextTable) Delete 

func (tt *TextTable) Delete(entity engi.Entity) (tc *TextComp)

func (*TextTable) Destroy 

func (tt *TextTable) Destroy()

Destroy Table

func (*TextTable) NewComp 

func (tt *TextTable) NewComp(entity engi.Entity) (tc *TextComp)

func (*TextTable) Size 

func (tt *TextTable) Size() (size, cap int)

type Transform 

type Transform struct {
	engi.Entity
	// contains filtered or unexported fields
}

还可以做更细的拆分，把 Matrix 全部放到一个数组里面 position, position, position .... position rotation, rotation, rotation .... rotation 把这两个数组申请为一块，然后分两个小组使用

func (*Transform) FirstChild 

func (xf *Transform) FirstChild() (c *Transform)

func (*Transform) LinkChild 

func (xf *Transform) LinkChild(c *Transform)

func (*Transform) LinkChildren 

func (xf *Transform) LinkChildren(list ...*Transform)

func (*Transform) Local 

func (xf *Transform) Local() SRT

func (*Transform) MoveBy 

func (xf *Transform) MoveBy(dx, dy float32)

func (*Transform) Parent 

func (xf *Transform) Parent() (p *Transform)

func (*Transform) Position 

func (xf *Transform) Position() f32.Vec2

func (*Transform) RemoveChild 

func (xf *Transform) RemoveChild(c *Transform)

func (*Transform) RotateBy 

func (xf *Transform) RotateBy(d float32)

func (*Transform) Rotation 

func (xf *Transform) Rotation() float32

func (*Transform) Scale 

func (xf *Transform) Scale() f32.Vec2

func (*Transform) ScaleBy 

func (xf *Transform) ScaleBy(dx, dy float32)

func (*Transform) SetPosition 

func (xf *Transform) SetPosition(position f32.Vec2)

Set local position relative to parent

func (*Transform) SetRotation 

func (xf *Transform) SetRotation(rotation float32)

apply

func (*Transform) SetScale 

func (xf *Transform) SetScale(scale f32.Vec2)

apply scale to child

func (*Transform) Sibling 

func (xf *Transform) Sibling() (prev, next *Transform)

func (*Transform) World 

func (xf *Transform) World() SRT

type TransformTable 

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

func NewTransformTable 

func NewTransformTable(cap int) *TransformTable

func (*TransformTable) Alive 

func (tt *TransformTable) Alive(entity engi.Entity) bool

func (*TransformTable) Comp 

func (tt *TransformTable) Comp(entity engi.Entity) (xf *Transform)

Return the TransformComp or nil

func (*TransformTable) Delete 

func (tt *TransformTable) Delete(entity engi.Entity)

Swap erase the TransformComp if exist Delete will unlink the parent-child relation

func (*TransformTable) Destroy 

func (tt *TransformTable) Destroy()

func (*TransformTable) NewComp 

func (tt *TransformTable) NewComp(entity engi.Entity) (xf *Transform)

Create a new TransformComp for the entity, Return the old one, if it already exist .

func (*TransformTable) Size 

func (tt *TransformTable) Size() (size, cap int)

type View 

type View struct {
	*Camera
	RenderNodes
}

type VisibilitySystem 

type VisibilitySystem interface {
	UpdateBounding(id int32, bb BoundingBox)
	UpdateTransform()
	Collect(camera *Camera) []engi.Entity
}

Source Files

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Directories

Path Synopsis
bk-api provide low-level graphics api.
 bk-api provide low-level graphics api.

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