倾斜控制在SDL为Android NDK JNI游戏 [英] Tilt Control in SDL for Android NDK JNI Games

问题描述

我使用使用SDL（简单直接媒体层）的Andr​​oid NDK和JNI系统上C ++游戏工作。我与大部分零部件做，但我不能够计算如何实现倾斜控制（倾斜控制在寺庙运行）。我用Google搜索了很多，没有任何相关的信息。
请帮助我，我卡住了。

I am working on C++ game using android NDK and JNI system using SDL (Simple DirectMedia Layer). I am done with most of the parts but i am not able to figure how to implement tilt control (tilt control as in temple run).I have googled a lot without any relevant information. Please help me i am stuck.

Raghuvendra库马尔

Raghuvendra Kumar

推荐答案

我可以使用倾斜控制在SDL虽然我还是不明白如何与X，Y，Z值对屏幕像素位置。但至少基本操作可使用的x，y，z值来执行。由于 _ aeror 右指针。这很简单。样品测​​试code如下： -

I am able to use tilt control in SDL though i still don't understand how to relate x,y,z values against the screen pixel position. But at least basic operation can be performed using x,y,z values. Thanks to aeror_ for right pointers. It's very simple. Sample test code as follow:-

#include "../SDL/src/core/android/SDL_android.h"

//Get Tilt values though SDL implementation
void InputHandler::HandleTitltEvt()
{

   float accelValues[3];
   Android_JNI_GetAccelerometerValues(accelValues);

   stTileValues_.x = accelValues[0];
   stTileValues_.y = accelValues[1];
   stTileValues_.z = accelValues[2];

   return ;

}

//Handle TiltValues to Move your player across the screen
void Player::HandleInput_()
{

    InputHandler::Instance()->HandleTitltEvt();

    Axis_t tiltValues = InputHandler::Instance()->getTiltValue();  
    if( (tiltValues.y > 0) && ((vPosition_.getY() + iHeight_) < (Game::Instance()->getGameHeight() - 15)))
    {

       vVelocity_.setY(iMoveSpeed + 5);


       if (tiltValues.x > 0)
       {
                vVelocity_.setX(iMoveSpeed+5);

       }
       else if (tiltValues.x < 0)
       {
          vVelocity_.setX(-(iMoveSpeed+5));

       }

    }
    else if ((tiltValues.y < 0) && ((vPosition_.getY() + iHeight_) > 0))
    {
           vVelocity_.setY(-(iMoveSpeed+5));


           if (tiltValues.x > 0)
       {
                vVelocity_.setX(iMoveSpeed+5);

       }
       else if (tiltValues.x < 0)
       {
          vVelocity_.setX(-(iMoveSpeed+5));

       }

    }
    else if (tiltValues.x > 0)
    {
           vVelocity_.setX(iMoveSpeed+5);

    }
    else if (tiltValues.x < 0)
    {
       vVelocity_.setX(-(iMoveSpeed+5));

    }

}

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