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Movement in 2D

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Hi, I am trying to do a asteroids clone and just having problems moving my ship in the direction it is facing in. I know about sin and cos and have been playing around with them with little success, and would appreciate help.

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float angle; // current bearing, 0 = vertical (x axis), positive clockwise
float posX;
float posY;

void move( float distance )
{
posX += cos(angle) * distance;
posY += sin(angle) * dishance;
}


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