Unity调用C++ dll实现打开双目相机-C#/.NET开发

这篇文章主要为大家详细介绍了如何在Unity中调用C++ dll实现打开双目相机的功能，文中的示例代码讲解详细，感兴趣的小伙伴可以跟随小编一起学习一下

1.vs中生成dll

对应的生成dll的cpp如下

#include<opencv2/opencv.hpp>
#include "opencv2/core/core.hpp"
#include "opencv2/imgproc/imgproc.hpp"
using namespace cv;
 
#define EXPORT_API __declspec(dllexport)
 
VideoCapture my_camera;
int width = 640;
int height = 480;
 
extern "C" bool EXPORT_API openCamera()
{
	bool my_open = false;
	while (!my_camera.isOpened())
	{
		std::cout << "Cannot open the camera!" << std::endl;
		my_camera.open(0);//一个接口能同时打开两个摄像头
	}
	my_camera.set(CV_CAP_PROP_FRAME_WIDTH, width*2);
	my_camera.set(CV_CAP_PROP_FRAME_HEIGHT, height);
	if (my_camera.isOpened())
	{
		my_open = true;
	}
	return my_open;
}
 
extern "C" void   EXPORT_API recieveFrame(uchar* texturePtr)
{
 
	Mat my_frameBGR;
	Mat my_frameRBG;
	my_camera >> my_frameBGR;
	if (my_frameBGR.data)
	{
		cvtColor(my_frameBGR, my_frameRBG, CV_BGR2RGB);
		memcpy(texturePtr, my_frameRBG.data, my_frameRBG.cols*my_frameRBG.rows*my_frameRBG.channels()*sizeof(uchar));
	}
 
}
 
extern "C" void EXPORT_API closeCamera()
{
	if (my_camera.isOpened())
	{
		my_camera.release();
	}
}

2.unity中justatry脚本

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;
using System.Runtime.InteropServices;用 c++中 dll 文件需要引入
 
public class justatry : MonoBehaviour {
 
	[DllImport("_dectecting")]
	public static extern bool openCamera();
 
	[DllImport("_dectecting")]
	public static extern bool recieveFrame(byte[] imageData);
 
	[DllImport("_dectecting")]
	public static extern bool closeCamera();
	public bool IsOpen = false;
	public byte[] imageData;
	public Texture2D tex;
	public int Width = 640;
	public int Length = 480;
	// Use this for initialization
	void Start () {
		IsOpen = openCamera();
		if(IsOpen)
		{
			imageData = new byte[Length * Width * 3*2];
			tex = new Texture2D(Width*2, Length, TextureFormat.RGB24, false);
		}
	}
	
	// Update is called once per frame
	void Update () {
			if (IsOpen)
			{
			recieveFrame(imageData);
				tex.LoadRawTextureData(imageData);
				tex.Apply();
				GetComponent<Renderer>().material.mainTexture = tex;
 
 
			}
	}
	void CloseCamera()
	{
		if (IsOpen)
		{
		 closeCamera();
 
		}
	}
	public void OnApplicatoinQuit()
	{
		closeCamera();
	}
}
using System.Runtime.InteropServices;用 c++中 dll 文件需要引入

public class justatry : MonoBehaviour {

	[DllImport("_dectecting")]
	public static extern bool openCamera();

	[DllImport("_dectecting")]
	public static extern bool recieveFrame(byte[] imageData);

	[DllImport("_dectecting")]
	public static extern bool closeCamera();
	public bool IsOpen = false;
	public byte[] imageData;
	public Texture2D tex;
	public int Width = 640;
	public int Length = 480;
	// Use this for initialization
	void Start () {
		IsOpen = openCamera();
		if(IsOpen)
		{
			imageData = new byte[Length * Width * 3*2];
			tex = new Texture2D(Width*2, Length, TextureFormat.RGB24, false);
		}
	}
	
	// Update is called once per frame
	void Update () {
			if (IsOpen)
			{
			recieveFrame(imageData);
				tex.LoadRawTextureData(imageData);
				tex.Apply();
				GetComponent<Renderer>().material.mainTexture = tex;


			}
	}
	void CloseCamera()
	{
		if (IsOpen)
		{
		 closeCamera();

		}
	}
	public void OnApplicatoinQuit()
	{
		closeCamera();
	}
}

注意，脚本要挂在plane上