Sprite – 2D scene graph for rendering and animation (go lang)

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Package sprite provides a 2D scene graph for rendering and animation.

A tree of nodes is drawn by a rendering Engine, provided by another package. The OS-independent Go version based on the image package is:

golang.org/x/mobile/exp/sprite/portable

An Engine draws a screen starting at a root Node. The tree is walked depth-first, with affine transformations applied at each level.

Nodes are rendered relative to their parent.

Typical main loop:

for each frame { quantize time.Now() to a clock.Time process UI events modify the scene's nodes and animations (Arranger values) e.Render(scene, t, sz) }

type Arranger
type Engine
type Node
- func (n *Node) AppendChild(c *Node)
- func (n *Node) RemoveChild(c *Node)
type SubTex
type Texture

This section is empty.

type Node struct { Parent, FirstChild, LastChild, PrevSibling, NextSibling *Node Arranger Arranger EngineFields struct { Dirty bool Index int32 SubTex SubTex } }

A Node is a renderable element and forms a tree of Nodes.

AppendChild adds a node c as a child of n.

It will panic if c already has a parent or siblings.

RemoveChild removes a node c that is a child of n. Afterwards, c will have no parent and no siblings.

It will panic if c's parent is not n.

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