Struct CaptionLayout 

pub struct CaptionLayout {
    pub background: Graphics,
    pub text_sprite: Sprite,
    pub text_rt: Arc<RenderTexture>,
    pub height_ndc: f32,
}

Result of laying out a CaptionBlock.

background and text_sprite are positioned in local NDC: the background is at Rect::new(0, 0, width_ndc, height_ndc) and the text sprite is inset by padding_ndc. Attach both to a Container and use the container’s transform to position the caption in the scene.

Fields

background: Graphics

Background pill / card.

text_sprite: Sprite

Text rendered into a RenderTexture, wrapped in a Sprite.

text_rt: Arc<RenderTexture>

Backing render-texture (kept alive for the duration of the caller’s stage). The sprite holds a Texture clone from this.

height_ndc: f32

Computed caption height in local NDC: text_height + 2 × padding.