@ginden/blinkstick-v2/dist/animations/common/morph.js

Improved Blickstick API for Node.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.morph = morph;
const tsafe_1 = require("tsafe");
const clamp_1 = require("../../utils/clamp");
const simple_frame_1 = require("../frame/simple-frame");
const assert_fps_below_100_1 = require("../helpers/assert-fps-below-100");
/**
 * Generates intermediate frames between two RGB colors.
 * These don't include the start and end frames.
 * @category Animations
 */
function morph(from, to, overMs, steps = overMs / 16) {
    (0, tsafe_1.assert)(steps > 0, 'steps must be greater than 0');
    (0, assert_fps_below_100_1.assertFpsBelow100)(overMs, steps);
    return {
        *[Symbol.iterator]() {
            const stepDuration = overMs / steps;
            for (let i = 0; i < steps; i++) {
                const ratio = (i + 1) / (steps + 1);
                const r = (0, clamp_1.clampRgb)(from[0] + (to[0] - from[0]) * ratio);
                const g = (0, clamp_1.clampRgb)(from[1] + (to[1] - from[1]) * ratio);
                const b = (0, clamp_1.clampRgb)(from[2] + (to[2] - from[2]) * ratio);
                yield new simple_frame_1.SimpleFrame([r, g, b], stepDuration);
            }
        },
    };
}
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