Python实现C#代码生成器应用服务于Unity示例解析

• • 所设置的tmpl文件如下：

开发目标：实现小红帽所挂脚本的自动生成

下图为生成的最终目标

本项目是从json中读取角色场景等信息，因此为了更好地判断所用属性是否需要，设置为bool类型，false表示在c#代码中注释掉该类属性，true代表使用该属性（属性暂时设置为）

    timer = true # 计时器
    speed = false # 速度
    istrigger = true # 触发器
    start_point = true # 起始位置
    localscale = true # 起始大小

主程序具体python代码如下：

from string import template
class builddata:
    def init(self):
        # 初始化各类$
        timer = true
        speed = false
        istrigger = true
        start_point = true
        localscale = true
        # 输出a.cs文件
        filepath = 'a.cs'
        class_file = open(filepath, 'w')
        # mycode用来存放生成的代码
        mycode = []
        # 加载模板文件
        template_file = open('tmpl1.tmpl', 'rb')
        template_file = template_file.read().decode('utf-8')
        tmpl = template(template_file)
        ##  模板替换
        # 1.需要判断是否使用的模板，不使用的给他注释掉
        if(timer):
            timercontent = ' '
        else:
            timercontent = '///'
        if (speed):
            speedcontent = ' '
        else:
            speedcontent = '///'

        if (istrigger):
           istriggercontent =' '
        else:
            istriggercontent ='///'

        if (start_point):
            start_pointcontent= ' '
        else:
            start_pointcontent= '///'

        if (localscale):
            localscalecontent = ' '
        else:
            localscalecontent='///'
        # 2.固定的模板值更替
        mycode.append(tmpl.safe_substitute(
            timercontent=timercontent,
            speedcontent=speedcontent,
            istriggercontent=istriggercontent,
            start_pointcontent=start_pointcontent,
            localscalecontent=localscalecontent,
            role='small_red_hat',
            x_start_point='12',
            y_start_point='-2',
            z_start_point='0',
            x_scale='0.45f',
            y_scale='0.5f',
            z_scale='1'
        ))
        # 将代码写入文件
        class_file.writelines(mycode)
        class_file.close()
        print('代码已生成')
if __name__ == '__main__':
    build = builddata()
    build.init()

所设置的tmpl文件如下：

using system.collections;
using system.collections.generic;
using unityengine;
public class ${role} : monobehaviour
{
    ${timercontent} public float timer;         //set a timer
    ${speedcontent} public float speed;   //speed
    ${istriggercontent} public bool istrigger;      //set a trigger
    void start()
    {
        //the start_point of ${role}
        ${start_pointcontent}transform.position = new vector3(${x_start_point}, ${y_start_point}, ${z_start_point});
        //the scale of ${role}
        ${localscalecontent}transform.localscale = new vector3(${x_scale},${y_scale}, ${z_scale});
    }
    void update()
    {
        //timer countdown
        ${timercontent} timer += time.deltatime;
        //when to move
        ${timercontent} if (timer >= 2f && timer <= 4f) {  istrigger = true;}
        //when to stop
        ${timercontent} else if (timer > 3.5f){  istrigger = false;}
        //the speed of ${role}
        ${istriggercontent}if(istrigger){ transform.translate(-0.04f, 0, 0);}

    }
}

自动生成的c#代码展示如下：

using system.collections;
using system.collections.generic;
using unityengine;
public class small_red_hat : monobehaviour
{
      public float timer;         //set a timer
    /// public float speed;   //speed
      public bool istrigger;      //set a trigger
    void start()
    {
        //the start_point of small_red_hat
         transform.position = new vector3(12, -2, 0);
        //the scale of small_red_hat
         transform.localscale = new vector3(0.45f,0.5f, 1);
    }
    void update()

    {
        //timer countdown
          timer += time.deltatime;
        //when to move
         if (timer >= 2f && timer <= 4f) {  istrigger = true;}
        //when to stop
          else if (timer > 3.5f){  istrigger = false;}
        //the speed of small_red_hat
        if (istrigger){ transform.translate(-0.04f, 0, 0);}
    }
}

仔细观察生成的结果，代码与目标生成的代码基本一致，（注释暂时只能使用英文编辑。） 随即把生成的代码放在unity中，观察运行情况。

运行前：

运行后：

 

可见，小红帽的控制器实现基本无误。 具体视频已放在b站：

unity的2d的animation纯代码实现，场景切换。

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