OClCollMeshEngn: produce ambience into stimBuff frames directly

stimBuffApis/livoxGen1/collateDgrams.cl

@@ -25,7 +25,7 @@ __kernel void collate(
 	__global uchar* assembly,
 	__global float* collation,
 	__global float* intensityBuffer,
-	__global float* averageIntensityBuffer,
+	__global float* ambienceBuffer,
 	uint slotStride,
 	uint nPointsPerSlot,
 	uint nDgramsPerFrame)
@@ -368,9 +368,9 @@ __kernel void collate(
 	// Unsupported data types are silently ignored
 
 	// Write average intensity for this work item (once at the end)
-	if (averageIntensityBuffer != NULL)
+	if (ambienceBuffer != NULL)
 	{
-		averageIntensityBuffer[slotIndex] = (validPointCount > 0) ?
+		ambienceBuffer[slotIndex] = (validPointCount > 0) ?
 			(intensitySum / (float)validPointCount) : 0.0f;
 	}
 }