Cubemap.GetPixels

参数

返回

Color[] An array that contains the pixel colors.

描述

Gets the pixel color data for a mipmap level of a face as Color structs.

This method gets pixel data from the texture in CPU memory. Texture.isReadable must be true.

The array contains the pixels row by row, starting at the bottom left of the face texture. The size of the array is the width × height of the mipmap level.

Each pixel is a Color struct. GetPixels might be slower than some other texture methods because it converts the format the texture uses into Color. GetPixels also needs to decompress compressed textures, and use memory to store the decompressed area. To get pixel data more quickly, use GetPixelData instead.

A single call to GetPixels is usually faster than multiple calls to GetPixel, especially for large textures.

If GetPixels fails, Unity throws an exception. GetPixels might fail if the array contains too much data. Use GetPixelData instead for very large textures.

You can't use GetPixel with textures that use Crunch texture compression.

using UnityEngine;

public class CubemapExample : MonoBehaviour
{
    public Cubemap source;
    public Cubemap destination;

    void Start()
    {
        // Get a copy of the color data from the source Cubemap, in high-precision float format.
        // Each element in the array represents the color data for an individual pixel.
        CubemapFace sourceFace = CubemapFace.PositiveX;
        int sourceMipLevel = 0;
        Color[] pixels = source.GetPixels(sourceFace, sourceMipLevel);

        // If required, manipulate the pixels before applying them to the destination texture.
        // This example code reverses the array, which rotates the image 180 degrees.
        System.Array.Reverse(pixels, 0, pixels.Length);

        // Set the pixels of the destination Cubemap.
        CubemapFace destinationFace = CubemapFace.PositiveX;
        int destinationMipLevel = 0;
        destination.SetPixels(pixels, destinationFace, destinationMipLevel);

        // Apply changes to the destination Cubemap, which uploads its data to the GPU.
        destination.Apply();
    }
}

See Also: SetPixels, GetPixelData, mipmapCount.