.:: Bots United ::. - Bot Aiming

if you run around a bot using this aiming algorithm with a constant angular velocity, you won't be hit ( if momentum, speed are not at instant aiming and the bullet spread isnt that big :D ).

some more info : http://johannes.lampel.net/joebotxp/botaim/index.html

the difference between the current angle will stay at a constant value, see diagram 1. This difference is related to the speed as (1-c)*currentSpeed. Thus the last diagram is the corrected one, which should allow a bot to kill you when you are running around a bot :D. so just a bit of correction is needed, and of course a local storage of the current state of the algorithm, before correcting :)

Code:

float a=.95,  // momemtum

 idealSpeed,

 c=.02,   // overall_speed

 aNow,   // recalculated momentum based on framerate

 fADiff;

float fmsecCount50 = m_fmsecCount / 50.0f;

float fAngleChange;

fADiff = abs(m_VIdealAngles.y - m_VCurrentAngles.y);

if(fADiff>180.0f){if(m_VIdealAngles.y > 0){m_VIdealAngles.y -= 360.0f;}

 else{m_VIdealAngles.y += 360.0f;}}

// compute the ideal angle speed (i.e, the amount of turning we WOULD want to do)

idealSpeed = (m_VIdealAngles.y - m_VCurrentAngles.y);

idealSpeed = idealSpeed*c;

// compute the new momentum given the previous one

aNow = exp(log(a) * fmsecCount50);

// compute the angle speed (i.e, the amount of turning we will actually achieve this frame)

m_fAngleSpeedYaw = m_fAngleSpeedYaw*aNow + idealSpeed*(1.f-aNow);

// calculate how big the actual angel change is

fAngleChange = m_fAngleSpeedYaw * (fmsecCount50);

m_VCurrentAngles.y += fAngleChange;

// ((1.f - c) * fAngleChange) to compensate 'shooting behind enemy'

m_pEntity.getEntity()->v.angles.y = m_VCurrentAngles.y + (1.f - c) * fAngleChange;

at least it's better than before, but I gotta test it in more different situations ... testing aiming inside the game isnt funny :)