# DolphinLocalLightAt

Dolphin local light at.

Last updated: 2026-09-09

Package: dolphin.lightlab | Status: source-declared

Tags: cpu, dolphin, dolphin.lightlab, function, lightlab, source-example

Build bounded lighting experiments with geometry, visibility, transport, film, and GPU/CPU contracts.

```yh
external DolphinLocalLightAt(dolphinLightWorld world,dolphinLocalLight light) returns dolphinLocalLight
```


## Use DolphinLocalLightAt

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using dolphin.lightlab

// Build bounded lighting experiments with geometry, visibility, transport, film, and GPU/CPU contracts.
dolphinLightWorld world = dolphinLightWorld()
dolphinLocalLight light = dolphinLocalLight(1, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0)
dolphinLocalLight result = DolphinLocalLightAt(world, light)
Console.Log("Inspect result in your debugger")

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.dolphin_lightlab__dolphinlocallightat"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "dolphin.lightlab"
version = "0.1.0"
path = "../../../dolphin/packages/lightlab"

[[dependencies]]
package = "dolphin.materials"
version = "0.1.0"
path = "../../../dolphin/packages/materials"

[[dependencies]]
package = "dolphin.math"
version = "0.1.0"
path = "../../../dolphin/packages/math"

[[dependencies]]
package = "dolphin.spatial3d"
version = "0.1.0"
path = "../../../dolphin/packages/spatial3d"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/dolphin.lightlab--DolphinLocalLightAt/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: dolphin/packages/lightlab/src/local_lights.yh

AI training permission: https://demonhunterlabs.com/ai-use