93 lines
2.5 KiB
TypeScript
93 lines
2.5 KiB
TypeScript
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import { describe, expect, it } from "vitest";
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import { deriveBoxLightVolumePointLights } from "../../src/runtime-three/light-volume-utils";
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describe("deriveBoxLightVolumePointLights", () => {
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it("derives a bounded four-light cluster from the dominant box axes", () => {
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const lights = deriveBoxLightVolumePointLights({
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size: {
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x: 8,
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y: 4,
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z: 2
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},
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intensity: 2,
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padding: 0.25,
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falloff: "linear"
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});
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expect(lights).toHaveLength(4);
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expect(new Set(lights.map((light) => light.localPosition.z))).toEqual(
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new Set([0])
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);
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expect(lights.every((light) => light.intensity === 1)).toBe(true);
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expect(lights.every((light) => light.distance > 0.75)).toBe(true);
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expect(lights.every((light) => light.decay === 1.4)).toBe(true);
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});
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it("shrinks the light cluster inward and reduces reach as padding increases", () => {
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const withoutPadding = deriveBoxLightVolumePointLights({
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size: {
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x: 6,
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y: 6,
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z: 3
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},
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intensity: 1.5,
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padding: 0,
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falloff: "smoothstep"
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});
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const withPadding = deriveBoxLightVolumePointLights({
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size: {
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x: 6,
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y: 6,
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z: 3
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},
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intensity: 1.5,
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padding: 1,
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falloff: "smoothstep"
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});
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expect(withPadding).toHaveLength(withoutPadding.length);
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expect(
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Math.abs(withPadding[0]?.localPosition.x ?? 0)
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).toBeLessThan(Math.abs(withoutPadding[0]?.localPosition.x ?? 0));
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expect(
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Math.abs(withPadding[0]?.localPosition.y ?? 0)
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).toBeLessThan(Math.abs(withoutPadding[0]?.localPosition.y ?? 0));
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expect((withPadding[0]?.distance ?? 0)).toBeLessThan(
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withoutPadding[0]?.distance ?? 0
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);
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});
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it("uses a softer smoothstep layout than linear falloff", () => {
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const linear = deriveBoxLightVolumePointLights({
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size: {
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x: 5,
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y: 5,
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z: 2
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},
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intensity: 1.25,
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padding: 0.4,
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falloff: "linear"
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});
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const smoothstep = deriveBoxLightVolumePointLights({
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size: {
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x: 5,
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y: 5,
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z: 2
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},
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intensity: 1.25,
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padding: 0.4,
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falloff: "smoothstep"
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});
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expect(Math.abs(smoothstep[0]?.localPosition.x ?? 0)).toBeGreaterThan(
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Math.abs(linear[0]?.localPosition.x ?? 0)
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);
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expect(Math.abs(smoothstep[0]?.localPosition.y ?? 0)).toBeGreaterThan(
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Math.abs(linear[0]?.localPosition.y ?? 0)
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);
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expect(smoothstep[0]?.decay).toBe(2);
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expect(linear[0]?.decay).toBe(1.4);
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});
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});
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