import { d } from './index';

/**
 * The `_sys` uniform block. Minimal by design — one field per engine-provided global. `time` is
 * CPU-accumulated (see kit/time.ts); `viewportSize` is the device-pixel backing-buffer size,
 * `logicalViewportSize` the CSS-pixel size (the two differ under DPR / resolution scaling).
 * `pointer` is in UV space; `pointerActive` is 0/1 (float, matching the ±1/0/1 float encoding
 * transforms already use for booleans).
 */
export declare const SystemUniforms: d.WgslStruct<{
    time: d.F32;
    viewportSize: d.Vec2f;
    logicalViewportSize: d.Vec2f;
    aspect: d.F32;
    pointer: d.Vec2f;
    pointerActive: d.F32;
}>;
/**
 * `viewportCoordinate` — pixel-space coordinate from a UV and the viewport size
 * (`uv * viewportSize`). GPU-callable and CPU-evaluable (dual fn), so it is unit-testable
 * on the CPU.
 */
export declare const viewportCoordinate: import('typegpu').TgpuFn<(uv: d.Vec2f, viewportSize: d.Vec2f) => d.Vec2f>;
/**
 * Aspect ratio (width / height) from a viewport size.
 */
export declare const aspectOf: import('typegpu').TgpuFn<(viewportSize: d.Vec2f) => d.F32>;
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