Term
| Define steering behaviors |
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Definition
| dictate how an agent moves. |
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Term
| Elements of steering behaviors |
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Definition
□ Use a steering vector
□ Use (conflicting) behaviors as influences
□ Usually involve incremental changes
□ Usually produce lifelike behavior |
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Term
| What are some common steering behaviors? |
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Definition
□ Individual Path Following
□ Crowd Path Following
□ Flocking & Swarming
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Term
| Steering behaviors are _____ behaviors |
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Definition
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Term
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Definition
| is steering behavior used to follow a target path. |
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Term
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Definition
□ Operates on a predefined path
□ Follows general direction of path
□ Applies a force in the direction of the path |
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Term
| What are not path following elements that you might think were? |
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Definition
□ A rigid process to match a path
□ A way to find a valid path
□ An exact science |
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Term
| Crowd Path Following introduces ______ |
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Definition
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Term
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Definition
| a steering technique that incorporates several factors to create lifelike flock & swarm behaviors. |
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Term
| . What are flocking elements . |
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Definition
□ Individual agents have own steering vectors
□ Behaviors influence individuals incrementally
□ Influence of behaviors determined by a strength weight
□ Direction changes determined by group average |
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Term
| . What are some benefits of Flocking Techniques? . |
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Definition
□ Agents retain individual, lifelike behaviors
□ Group vectors allow for simple calculations
□ Behavior influence on flock can be increased or reduced easily
□ Weight adjustments are immediately realized in agent behavior |
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Term
| . What are the three main forces that are used in flocking to generate group behaviors? . |
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Definition
□ Alignment
□ Cohesion
□ Separation |
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Term
| . What does Separation do? . |
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Definition
| steer to avoid crowding local flockmates |
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Term
| . What does Alignment do? . |
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Definition
| steer towards the average heading of local flockmates |
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Term
| . What does Cohesion do? . |
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Definition
| steer to move toward the average position of local flockmates |
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Term
| . What are the various methods of a flock class? . |
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Definition
CalcAligmentAccel
CalcCohesionAccel
CalcSeparationAccel
Update |
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Term
| . Pseudocode for CalcAligmentAccel . |
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Definition
// Calculate acceleration from flock alignment
Vec3 acceleration = focusFoward * strength[0] * ts;
return acceleration; |
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Term
| . Pseudocode for CalcCohesionAccel . |
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Definition
// Calculate the difference vector.
Vec3 vec = focusPosition – boid->position;
// Adjust each boid’s forward vector.
Vec3 acceleration = vec * strength[1] * ts;
return acceleration; |
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Term
| . Pseudocode for CalcSeparationAccel . |
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Definition
Vec3 acceleration = Vec3(0,0,0);
// Determine nearest neighbor
// If there is potential for a collision, push away.
Vec3 vec = boid->position – neighbor.position;
acceleration = vec * strength[2] * ts;
return acceleration; |
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Term
| . Pseudocode for Update . |
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Definition
Calculate focusForward & focusPosition();
Vec3 a; // total acceleration
for each Boid:
a += Calc Each strength Accel();
boid.velocity += a;
Normalize(boid.velocity);
Scale(boid.velocity, MaxSpeed) |
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