| destination | A pointer to the destination memory block. Ensure this block has enough space to hold the replicated data. |
| source | A pointer to the source memory block. This block should contain the data you want to replicate. |
| size | The size, in bytes, of the data block to copy and replicate. This specifies the number of bytes that are replicated each time. |
| count | The number of times to replicate the source data block in the destination buffer. |
Copies memory from a source to a destination and replicates it multiple times.
The MemCpyReplicate method copies a specified block of memory from a source location and replicates that block multiple times into a destination location. This is useful for quickly initializing a large buffer with repeated values, such as setting up constant buffers or initializing large arrays with repeated patterns.
using UnityEngine; using Unity.Collections.LowLevel.Unsafe;
public class MemCpyReplicateExample : MonoBehaviour { void Start() { int elementCount = 3; int replicateCount = 4; int dataSize = elementCount * sizeof(float);
// Use stackalloc to allocate memory for source and destination buffers unsafe { float* srcBuffer = stackalloc float[elementCount]; float* dstBuffer = stackalloc float[elementCount * replicateCount];
// Initialize the source buffer with multiple values srcBuffer[0] = 1.1f; srcBuffer[1] = 2.2f; srcBuffer[2] = 3.3f;
// Use MemCpyReplicate to copy and replicate the source values into the destination UnsafeUtility.MemCpyReplicate(dstBuffer, srcBuffer, dataSize, replicateCount);
// Output the contents of the destination buffer to verify replication Debug.Log("Contents of destination buffer after MemCpyReplicate:"); for (int i = 0; i < elementCount * replicateCount; i++) { Debug.Log(dstBuffer[i]); // Expected pattern: 1.1, 2.2, 3.3 repeated } } } }
Additional resources: UnsafeUtility.MemCpy.