Basically, I'm here to sum it up:
Let's assume you have a player position and a mouse - or better - target position:
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| Vec2 playerPos;
Vec2 targetPos; |
's simply store
s.
To get the degree angle between those two vectors:
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| float degrees = Math.toDegrees(Math.atan2(targetPos.x - playerPos.x, targetPos.y - playerPos.y)); |
You can then use the degrees to translate the x and y position of the bullet:
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| Vec2 bulletPos;
float deltaX = Math.cos(Math.toRadians(degrees)) * speed;
float deltaY = Math.sin(Math.toRadians(degrees)) * speed;
|
Finally we can optimize it by removing the
at the atan2 and the
from the sine and cosine.
Now instead of converting from
delta vector -> direction (radians) -> direction (degrees) -> direction (radians) -> delta*, we now do
delta vector -> direction (radians) -> delta*.
Marvel at the mighty code:
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| public float getDirectionRad(Vec2 v0, Vec2 v1) {
return Math.atan2(v1.x - v0.x, v1.y - v0.y);
}
float directionInRadians = getDirectionRad(playerPos, targetPos);
float deltaX = Math.cos(directionInRadians);
float deltaY = Math.sin(directionInRadians);
bulletPos.x += deltaX;
bulletPos.y += deltaY; |
I hope I summed it up so people understand it
