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ps/trunk/binaries/data/mods/public/simulation/components/Attack.js
| Show First 20 Lines • Show All 509 Lines • ▼ Show 20 Lines | if (type == "Ranged") | ||||
| // In the future this could be extended: | // In the future this could be extended: | ||||
| // * Obstacles like trees could reduce the probability of the target being hit | // * Obstacles like trees could reduce the probability of the target being hit | ||||
| // * Obstacles like walls should block projectiles entirely | // * Obstacles like walls should block projectiles entirely | ||||
| let horizSpeed = +this.template[type].Projectile.Speed; | let horizSpeed = +this.template[type].Projectile.Speed; | ||||
| let gravity = +this.template[type].Projectile.Gravity; | let gravity = +this.template[type].Projectile.Gravity; | ||||
| // horizSpeed /= 2; gravity /= 2; // slow it down for testing | // horizSpeed /= 2; gravity /= 2; // slow it down for testing | ||||
| // We will try to estimate the position of the target, where we can hit it. | |||||
| // We first estimate the time-till-hit by extrapolating linearly the movement | |||||
| // of the last turn. We compute the time till an arrow will intersect the target. | |||||
| let cmpPosition = Engine.QueryInterface(this.entity, IID_Position); | let cmpPosition = Engine.QueryInterface(this.entity, IID_Position); | ||||
| if (!cmpPosition || !cmpPosition.IsInWorld()) | if (!cmpPosition || !cmpPosition.IsInWorld()) | ||||
| return; | return; | ||||
| let selfPosition = cmpPosition.GetPosition(); | let selfPosition = cmpPosition.GetPosition(); | ||||
| let cmpTargetPosition = Engine.QueryInterface(target, IID_Position); | let cmpTargetPosition = Engine.QueryInterface(target, IID_Position); | ||||
| if (!cmpTargetPosition || !cmpTargetPosition.IsInWorld()) | if (!cmpTargetPosition || !cmpTargetPosition.IsInWorld()) | ||||
| return; | return; | ||||
| let targetPosition = cmpTargetPosition.GetPosition(); | let targetPosition = cmpTargetPosition.GetPosition(); | ||||
| let previousTargetPosition = Engine.QueryInterface(target, IID_Position).GetPreviousPosition(); | let targetVelocity = Vector3D.sub(targetPosition, cmpTargetPosition.GetPreviousPosition()).div(turnLength); | ||||
| let targetVelocity = Vector3D.sub(targetPosition, previousTargetPosition).div(turnLength); | |||||
| let timeToTarget = PositionHelper.PredictTimeToTarget(selfPosition, horizSpeed, targetPosition, targetVelocity); | let timeToTarget = PositionHelper.PredictTimeToTarget(selfPosition, horizSpeed, targetPosition, targetVelocity); | ||||
| let predictedPosition = (timeToTarget !== false) ? Vector3D.mult(targetVelocity, timeToTarget).add(targetPosition) : targetPosition; | |||||
| // 'Cheat' and use UnitMotion to predict the position in the near-future. | |||||
| // This avoids 'dancing' issues with units zigzagging over very short distances. | |||||
| // However, this could fail if the player gives several short move orders, so | |||||
| // occasionally fall back to basic interpolation. | |||||
| let predictedPosition = targetPosition; | |||||
| if (timeToTarget !== false) | |||||
| { | |||||
| // Don't predict too far in the future, but avoid threshold effects. | |||||
| // After 1 second, always use the 'dumb' interpolated past-motion prediction. | |||||
| let useUnitMotion = randBool(Math.max(0, 0.75 - timeToTarget / 1.333)); | |||||
| if (useUnitMotion) | |||||
| { | |||||
| let cmpTargetUnitMotion = Engine.QueryInterface(target, IID_UnitMotion); | |||||
| let cmpTargetUnitAI = Engine.QueryInterface(target, IID_UnitAI); | |||||
| if (cmpTargetUnitMotion && (!cmpTargetUnitAI || !cmpTargetUnitAI.IsFormationMember())) | |||||
| { | |||||
| let pos2D = cmpTargetUnitMotion.EstimateFuturePosition(timeToTarget); | |||||
| predictedPosition.x = pos2D.x; | |||||
| predictedPosition.z = pos2D.y; | |||||
| } | |||||
| else | |||||
| predictedPosition = Vector3D.mult(targetVelocity, timeToTarget).add(targetPosition); | |||||
| } | |||||
| else | |||||
| predictedPosition = Vector3D.mult(targetVelocity, timeToTarget).add(targetPosition); | |||||
| } | |||||
| // Add inaccuracy based on spread. | // Add inaccuracy based on spread. | ||||
| let distanceModifiedSpread = ApplyValueModificationsToEntity("Attack/Ranged/Spread", +this.template[type].Projectile.Spread, this.entity) * | let distanceModifiedSpread = ApplyValueModificationsToEntity("Attack/Ranged/Spread", +this.template[type].Projectile.Spread, this.entity) * | ||||
| predictedPosition.horizDistanceTo(selfPosition) / 100; | predictedPosition.horizDistanceTo(selfPosition) / 100; | ||||
| let randNorm = randomNormal2D(); | let randNorm = randomNormal2D(); | ||||
| let offsetX = randNorm[0] * distanceModifiedSpread; | let offsetX = randNorm[0] * distanceModifiedSpread; | ||||
| let offsetZ = randNorm[1] * distanceModifiedSpread; | let offsetZ = randNorm[1] * distanceModifiedSpread; | ||||
| ▲ Show 20 Lines • Show All 97 Lines • Show Last 20 Lines | |||||
Wildfire Games · Phabricator