ILampArray::GetIndicesForPurposes

Article
2025-04-28

Populates a buffer of Lamp indices that support a given set of LampPurposes. Prior to calling this method, the maximum buffer size should be obtained by calling ILampArray::GetIndicesCountForPurposes.

Syntax

void GetIndicesForPurposes(
    LampPurposes lampPurposes,
    uint32_t lampIndicesCount,
    uint32_t * lampIndices)

Parameters

lampPurposes Type: LampPurposes

The desired set of LampPurposes.

lampIndicesCount
Type: uint32_t

The size of the buffer to populate.

lampIndices _Out_writes_(lampIndicesCount) Type: uint32_t*

The Lamp indices buffer. Indices written into the buffer are for Lamps that match all of the flags in lampPurposes.

Return value

Type: void

Remarks

The following code demonstrates how to set a color for all branding Lamps on an ILampArray:

void UpdateBrandingLamps(ILampArray* lampArray)
{
    // Get the number of Branding lamps
    LampPurposes purposes = LampPurposes::Branding;
    uint32_t indicesCount = lampArray->GetIndicesCountForPurposes(purposes);

    // Allocate and populate a buffer with the indices of those Lamps
    std::vector<uint32_t> indicesBuffer(indicesCount);
    lampArray->GetIndicesForPurposes(purposes, indicesCount, indicesBuffer.data());

    // Set color for all Branding Lamps to red.
    std::vector<LampArrayColor> colorsBuffer(indicesCount);
    for (uint32_t i = 0; i < indicesCount; i++)
    {
        colorsBuffer[i] = { 0xFF /* r */, 0x0 /* g */, 0x0 /* b */, 0xFF /* a */ };
    }

    lampArray->SetColorsForIndices(indicesCount, indicesBuffer.data(), colorsBuffer.data());
}

Requirements

Header: LampArray.h

Library: xgameplatform.lib

Supported platforms: Xbox One family consoles and Xbox Series consoles

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