计算汽车倒档的位置 [英] calculating position in reverse gear of car

问题描述

大家好

我想编写一个模拟汽车的程序。

我在计算倒车档位时遇到问题



这是我的前进档代码：

theta是车轮的角度

-45< angle< 45

汽车的主要位置是（800,500），格式为

if（gearState（）== 1）//前进档位

{

position.X + =（Int32）（speed（）* Math.Sin（theta * Math.PI / 180））;

position.Y - =（Int32）（ speed（）* Math.Cos（theta * Math.PI / 180））;

}

此代码工作得非常好，但在倒档时不起作用。<当theta = 20并且汽车处于倒车状态时，汽车向左转而不是向右转动$ / b
$ b你有什么想法吗？

请帮忙我

hi everyone
I want to write a program that simulate a car .
I have a problem with calculating position in the reverse gear

this is my code in forward gear:
theta is the angle of wheels of the car
-45<angle<45
primary position of car is in (800,500) in the form
if (gearState() == 1)//forward gear
{
position.X += (Int32)(speed() * Math.Sin(theta * Math.PI / 180));
position.Y -= (Int32)(speed() * Math.Cos(theta * Math.PI / 180));
}
this code work very good but doesn't work in reverse gear.
when theta=20 and car is in reverse gear car goes to the left instead of going right
do you have any idea ?
please help me

推荐答案

假设你的汽车无量纲（和 speed（）正面），不应该

Assuming your car dimensionless (and speed() positive), shouldn't

if (gearState() == -1)//reverse gear
{
   position.X += (Int32)(speed() * Math.Sin(theta * Math.PI / 180));
   position.Y <big>+=</big> (Int32)(speed() * Math.Cos(theta * Math.PI / 180));
}

诀窍？

：）

do the trick?
:)

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