// luma.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import { glsl } from "../../../lib/glsl-utils/highlight.js";
import { project } from "../../project/project.js";
const DEFAULT_MODULE_OPTIONS = {
    lightDirection: new Float32Array([1, 1, 2])
};
function getUniforms(opts = DEFAULT_MODULE_OPTIONS) {
    const uniforms = {};
    if (opts.lightDirection) {
        // @ts-expect-error TODO add types
        uniforms.dirlight_uLightDirection = opts.lightDirection;
    }
    return uniforms;
}
const fs = `\
uniform vec3 dirlight_uLightDirection;
vec4 dirlight_filterColor(vec4 color) {
vec3 normal = project_getNormal_World();
float d = abs(dot(normalize(normal), normalize(dirlight_uLightDirection)));
return vec4(color.rgb * d, color.a);
}
`;
/**
 * Cheap lighting - single directional light, single dot product, one uniform
 */
export const dirlight = {
    name: 'dirlight',
    // vs // TODO - reuse normal from geometry module
    fs,
    getUniforms,
    dependencies: [project]
};