surface

Documentation

Index

• type Heightfield
• type Markdown
  • func (m Markdown) Render() Rendered
• type Rendered
• type Scene
  • func (s Scene) Render() Rendered

Types

type Heightfield

type Heightfield struct {
	Res int
	Z   []float64
}

Heightfield is the res×res grid of z values — the pure output of the math, row-major, x fastest.

type Markdown

type Markdown string

func (Markdown) Render

func (m Markdown) Render() Rendered

type Rendered

type Rendered struct{ MIME, Data string }

type Scene

type Scene struct {
	Field Heightfield
}

Scene wraps a heightfield and renders it to a WebGL canvas.

func (Scene) Render

func (s Scene) Render() Rendered

Render emits the text/html the client injects: a <canvas> and an <img onerror> that bootstraps WebGL. The heightfield rides in a data- attribute as a JSON array; the handler reads it, builds a triangle mesh, and animates a rotating, height-shaded draw. The Go side never touches a pixel; the JS never touches the math. That the JS lives in a string here — not in a .js file, not importable, not typechecked — is the honest cost of the escape hatch, and why it's quarantined to this one cell.