import { ShaderProgram } from './shaderProgram.js';
import { TextureCubeMap, VertexArray, VertexBuffer } from './resources.js';
import type { ReadonlyMat4 } from 'gl-matrix';
export declare const SKYBOX_VERTEX_SHADER = "#version 300 es\nprecision highp float;\n\nlayout(location = 0) in vec3 a_position;\n\nuniform mat4 u_viewProjectionNoTranslation;\nuniform vec2 u_scroll;\n\nout vec3 v_direction;\n\nvoid main() {\n  // The cube vertices (a_position) are in GL space (-1 to 1, standard OpenGL cube).\n  // The viewProjection matrix expects Quake-space input (it contains Quake-to-GL transform).\n  // So we must transform GL -> Quake before applying the view matrix.\n  //\n  // GL-to-Quake mapping (inverse of Quake-to-GL):\n  // GL -Z -> Quake +X (forward)\n  // GL -X -> Quake +Y (left)\n  // GL +Y -> Quake +Z (up)\n  // So: (gl.x, gl.y, gl.z) -> (-gl.z, -gl.x, gl.y)\n  vec3 quakePos = vec3(-a_position.z, -a_position.x, a_position.y);\n  vec4 pos = u_viewProjectionNoTranslation * vec4(quakePos, 1.0);\n  // Force z = w to render at far plane, avoiding clipping issues\n  // for triangles that intersect the camera plane\n  gl_Position = pos.xyww;\n\n  // For cubemap sampling, use the original GL-space position since\n  // WebGL cubemap targets (POSITIVE_X, etc.) are in GL conventions.\n  vec3 dir = a_position;\n\n  // Apply scroll offset for animated skies\n  dir.xy += u_scroll;\n  v_direction = dir;\n}";
export declare const SKYBOX_FRAGMENT_SHADER = "#version 300 es\nprecision highp float;\n\nin vec3 v_direction;\nuniform samplerCube u_skybox;\n\nout vec4 o_color;\n\nvoid main() {\n  o_color = texture(u_skybox, v_direction);\n}";
export interface SkyboxBindOptions {
    readonly viewProjection: Float32List;
    readonly scroll: readonly [number, number];
    readonly textureUnit?: number;
}
export declare class SkyboxPipeline {
    readonly gl: WebGL2RenderingContext;
    readonly program: ShaderProgram;
    readonly vao: VertexArray;
    readonly vbo: VertexBuffer;
    readonly cubemap: TextureCubeMap;
    private readonly uniformViewProj;
    private readonly uniformScroll;
    private readonly uniformSampler;
    constructor(gl: WebGL2RenderingContext);
    get shaderSize(): number;
    bind(options: SkyboxBindOptions): void;
    draw(): void;
    dispose(): void;
}
export declare function removeViewTranslation(viewMatrix: ReadonlyMat4 | Float32Array): Float32Array;
export declare function computeSkyScroll(timeSeconds: number, scrollSpeeds?: readonly [number, number]): [number, number];
//# sourceMappingURL=skybox.d.ts.map