How do I know when to increase or decrease angle to get a specific angle?
- by Thomas
Hi. I am programming a game and I have come to a very hard spot. Basically I have a circle and I have 2 angles on this circle. Angle 1 (A) is a point I want angle 2 (B) to go to. During my game every frame I need to check weither or not to increase or decrease my angle value by a certain amount (speed) to eventually reach the first angle. My question is how do I do this?
I tried doing this but I don't seem to be doing it right.
bool increase = false;
float B = [self radiansToDegrees:tankAngle];
float A = [self radiansToDegrees:tankDestinationAngle];
float newAngle = B;
if(B < A) {
float C = B - (360 - A);
float D = A - B;
if(C < D) increase = false;
else increase = true;
} else if(B A) {
float C = B - A;
float D = A - (360 - B);
if(C < D) increase = false;
else increase = true;
}
if(increase) {
newAngle += 1.0;
} else {
newAngle -= 1.0;
}
if(newAngle 360.0) {
newAngle = 0 + (newAngle - 360.0);
} else if(newAngle < 0.0) {
newAngle = 360 + newAngle;
}
if(newAngle == 0) newAngle = 360;
newAngle = [self degreesToRadians:newAngle];
[self setTanksProperPositionRotation:newAngle];
The basic effect I am trying to achieve is when the user makes a new point, which would be angle 1, angle 2 would move towards angle 1 choosing the fastest direction. I think I have spent around 4 hours trying to figure this out.
