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Tutorial 4: Improved aiming for bow and spear AIs

floating-point
Peewee 2010-09-29 20:44:45 -04:00
parent 4a1a9cc2b0
commit f51a1f4d68
3 changed files with 88 additions and 53 deletions
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84
planet/Tutorial.c4f/Tutorial04.c4s/System.c4g/AIBowAttack.c
View File

@ -7,8 +7,11 @@ public func AI_IsLoaded() { return !!FindObject(Find_Container(this), Find_ID(Ar
public func AI_CommandString() { return "AI_BowAttack"; }
public func AI_TargetHittable(object target)
{
var x = ObjectDistance(target, Contained());
return Max(0, - x * (x - 200) / 100);
var xDist = target->GetX() - Contained()->GetX();
var yDist = target->GetY() - Contained()->GetY();
// (vel*vel*vel*vel - g*(g*x*x + 2*y*vel*vel)) <see: AI_BowFirePos()>
// vel = 100, g = 20
return Max(1, 100000000 - (400*xDist*xDist + yDist*400000));
}
protected func AI_BowAttack(object clonk, int x, int y, object target)
@ -22,7 +25,6 @@ protected func AI_BowAttack(object clonk, int x, int y, object target)
clonk->AddCommand("Acquire", nil, nil, nil, nil, nil, Arrow);
return;
}
// Shoot an arrow. Todo: aim better.
AddEffect("AI_BowAim", clonk, 100, 1, this, nil, target);
clonk->AppendCommand("Wait", nil, 50, nil, nil, nil, 50);
@ -37,9 +39,15 @@ protected func FxAI_BowAimStart(object clonk, int num, int temporary, object tar
EffectVar(0, clonk, num) = target;
var dx = target->GetX() - clonk->GetX();
var dy = target->GetY() - clonk->GetY();
var dist = Distance(0, 0, dx, dy);
dy -= dist / 10;
ControlUseStart(clonk, dx, dy);
//var dist = Distance(0, 0, dx, dy);
//dy -= dist / 10;
//ControlUseStart(clonk, dx, dy);
var aimVector = AI_AimPos(dx, dy, 100, 5);
if(aimVector == -1) {
ControlUseCancel(clonk,nil,nil);
}else{
ControlUseStart(clonk, aimVector[0], aimVector[1]);
}
}
protected func FxAI_BowAimTimer(object clonk, int num, int time)
@ -49,10 +57,16 @@ protected func FxAI_BowAimTimer(object clonk, int num, int time)
var target = EffectVar(0, clonk, num);
var dx = target->GetX() - clonk->GetX();
var dy = target->GetY() - clonk->GetY();
var dist = Distance(0, 0, dx, dy);
dy -= dist / 10;
ControlUseHolding(clonk, dx, dy);
return 1;
//var dist = Distance(0, 0, dx, dy);
//dy -= dist / 10;
//ControlUseHolding(clonk, dx, dy);
var aimVector = AI_AimPos(dx, dy, 100, 5);
if(aimVector == -1) {
ControlUseCancel(clonk,nil,nil);
}else{
ControlUseHolding(clonk, aimVector[0], aimVector[1]);
return 1;
}
}
protected func FxAI_BowAimStop(object clonk, int num, int reason, bool temporary)
@ -60,37 +74,27 @@ protected func FxAI_BowAimStop(object clonk, int num, int reason, bool temporary
var target = EffectVar(0, clonk, num);
var dx = target->GetX() - clonk->GetX();
var dy = target->GetY() - clonk->GetY();
var dist = Distance(0, 0, dx, dy);
dy -= dist / 10;
ControlUseStop(clonk, dx, dy);
return 1;
//var dist = Distance(0, 0, dx, dy);
//dy -= dist / 10;
//ControlUseStop(clonk, dx, dy);
var aimVector = AI_AimPos(dx, dy, 100, 5);
if(aimVector == -1) {
ControlUseCancel(clonk,nil,nil);
}else{
ControlUseStop(clonk, aimVector[0], aimVector[1]);
return 1;
}
}
private func AI_BowFirePos(x, y)
//vel = "muzzle velocity" (speed at which the projectile is launched)
//spread = variation in aim
private func AI_AimPos(int x, int y, int vel, int spread)
{
var v = 10, // 10 px / tick
f = 200, // Fixpunktfaktor
g = -GetGravity() * f * f / 1000 / v, // 0,2 px / tick˛
x = x * f / v,
y = -y * f / v /* Korrektur: */ - Abs(x) * GetGravity() / 2000,
d = y * y + x * x,
k = y + f * f * f / 2 / g,
w = k * k - d;
if (w < 0)
return;
var t1 = Sqrt( (k + Sqrt(w)) * (f * f * f / g) ),
t2 = Sqrt( (k - Sqrt(w)) * (f * f * f / g) ),
phi1 = ArcCos(x, t1),
phi2 = ArcCos(x, t2);
if(y < g * t1 / f * t1 / f / f) phi1 = -phi1;
if(y < g * t2 / f * t2 / f / f) phi2 = -phi2;
// Winkel umrechnen
phi1 = (270 - phi1) % 360 - 180;
phi2 = 90 - phi2;
var angle = phi1;
if(t2 < t1 * 3)
angle = phi2;
return [Sin(angle, 100), Cos(angle, 100)];
y = -y;
var g = GetGravity()/5; //FnGetGravity() multiplies actual gravity by 500
var root = (vel*vel*vel*vel - g*(g*x*x + 2*y*vel*vel));
if(root < 0)
return -1;
var angle = Angle(0,0,(g*x),vel*vel-Sqrt(root));
return [Sin(angle, 100)+Random(2*spread)-spread, Cos(angle, 100)+Random(2*spread)-spread];
}

55
planet/Tutorial.c4f/Tutorial04.c4s/System.c4g/AIJavelinAttack.c
View File

@ -28,10 +28,16 @@ protected func FxAI_JavelinAimStart(object clonk, int num, int temporary, object
return;
EffectVar(0, clonk, num) = target;
var dx = target->GetX() - clonk->GetX();
var dy = target->GetY() - clonk->GetY();
var dist = Distance(0, 0, dx, dy);
dy -= dist / 10;
ControlUseStart(clonk, dx, dy);
var dy = target->GetY() - (clonk->GetY()-5);
//var dist = Distance(0, 0, dx, dy);
//dy -= dist / 10;
//ControlUseStart(clonk, dx, dy);
var aimVector = AI_AimPos(dx, dy, clonk->GetPhysical("Throw") / 800, 0);
if(aimVector == -1) {
ControlUseCancel(clonk,nil,nil);
}else{
ControlUseStart(clonk, aimVector[0], aimVector[1]);
}
}
protected func FxAI_JavelinAimTimer(object clonk, int num, int time)
@ -40,10 +46,16 @@ protected func FxAI_JavelinAimTimer(object clonk, int num, int time)
return -1;
var target = EffectVar(0, clonk, num);
var dx = target->GetX() - clonk->GetX();
var dy = target->GetY() - clonk->GetY();
var dist = Distance(0, 0, dx, dy);
dy -= dist / 10;
ControlUseHolding(clonk, dx, dy);
var dy = target->GetY() - (clonk->GetY()-5);
//var dist = Distance(0, 0, dx, dy);
//dy -= dist / 10;
//ControlUseHolding(clonk, dx, dy);
var aimVector = AI_AimPos(dx, dy, clonk->GetPhysical("Throw") / 800, 0);
if(aimVector == -1) {
ControlUseCancel(clonk,nil,nil);
}else{
ControlUseHolding(clonk, aimVector[0], aimVector[1]);
}
return 1;
}
@ -51,9 +63,28 @@ protected func FxAI_JavelinAimStop(object clonk, int num, int reason, bool tempo
{
var target = EffectVar(0, clonk, num);
var dx = target->GetX() - clonk->GetX();
var dy = target->GetY() - clonk->GetY();
var dist = Distance(0, 0, dx, dy);
dy -= dist / 10;
ControlUseStop(clonk, dx, dy);
var dy = target->GetY() - (clonk->GetY()-5);
//var dist = Distance(0, 0, dx, dy);
//dy -= dist / 10;
//ControlUseStop(clonk, dx, dy);
var aimVector = AI_AimPos(dx, dy, clonk->GetPhysical("Throw") / 800, 0);
if(aimVector == -1) {
ControlUseCancel(clonk,nil,nil);
}else{
ControlUseStop(clonk, aimVector[0], aimVector[1]);
}
return 1;
}
//vel = "muzzle velocity" (speed at which the projectile is launched)
//spread = variation in aim
private func AI_AimPos(int x, int y, int vel, int spread)
{
y = -y;
var g = GetGravity()/5; //FnGetGravity() multiplies actual gravity by 500
var root = (vel*vel*vel*vel - g*(g*x*x + 2*y*vel*vel));
if(root < 0)
return -1;
var angle = Angle(0,0,(g*x),vel*vel-Sqrt(root));
return [Sin(angle, 100)+Random(2*spread)-spread, Cos(angle, 100)+Random(2*spread)-spread];
}

2
planet/Tutorial.c4f/Tutorial04.c4s/System.c4g/AIRangedAttack.c
View File

@ -7,7 +7,7 @@ protected func AI_RangedAttack(object clonk, int x, int y, object target)
clonk->AI_LogCommandStack();
clonk->AI_Log("Ranged attack on %v", target);
// target in range?
if (ObjectDistance(clonk, target) > 400 || target->Contained())
if (ObjectDistance(clonk, target) > 1000 || target->Contained())
return clonk->AI_Log("Target %v out of range", target);
// target still alive?