Windcorp/JavaProgressia
Windcorp/JavaProgressia
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Fixed falling through blocks

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This commit is contained in:
OLEGSHA 2020-11-19 17:51:45 +03:00
parent cf18da8350
commit c5ae4e5ab9
1 changed files with 28 additions and 22 deletions
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50
src/main/java/ru/windcorp/progressia/common/collision/colliders/Collider.java
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@ -15,6 +15,23 @@ public class Collider {
private static final int MAX_COLLISIONS_PER_ENTITY = 64;
/**
* Dear Princess Celestia,
* <p>
* When {@linkplain #advanceTime(Collection, Collision, WorldData, float) advancing time},
* time step for all entities <em>except</em> currently colliding bodies is the current
* collisions's timestamp relative to now. However, currently colliding bodies
* (Collision.a and Collision.b) have a smaller time step. This is done to make sure
* they don't intersect due to rounding errors.
* <p>
* Today I learned that bad code has nothing to do with friendship, although lemme tell ya:
* it's got some dank magic.
* <p>
* Your faithful student,<br />
* Kostyl.
*/
private static final float TIME_STEP_COEFFICIENT_FOR_CURRENTLY_COLLIDING_BODIES = 1e-1f;
public static void performCollisions(
List<? extends Collideable> colls,
WorldData world,
@ -46,7 +63,7 @@ public class Collider {
}
}
advanceTime(colls, world, tickLength);
advanceTime(colls, null, world, tickLength);
}
private static Collision getFirstCollision(
@ -148,7 +165,7 @@ public class Collider {
float tickLength,
ColliderWorkspace workspace
) {
advanceTime(colls, world, collision.time);
advanceTime(colls, collision, world, collision.time);
boolean doNotHandle = false;
@ -274,8 +291,6 @@ public class Collider {
collision.a.changeVelocityOnCollision(du_a);
collision.b.changeVelocityOnCollision(du_b);
separate(collision, n, m_a, m_b);
// JGML is still to fuck
Vectors.release(n);
Vectors.release(v_a);
@ -287,25 +302,9 @@ public class Collider {
Vectors.release(du_b);
}
private static void separate(
Collision collision,
Vec3 normal, float aRelativeMass, float bRelativeMass
) {
final float margin = 1e-4f;
Vec3 displacement = Vectors.grab3();
displacement.set(normal).mul(margin).mul(bRelativeMass);
collision.a.moveAsCollideable(displacement);
displacement.set(normal).mul(margin).mul(aRelativeMass).negate();
collision.b.moveAsCollideable(displacement);
Vectors.release(displacement);
}
private static void advanceTime(
Collection<? extends Collideable> colls,
Collision exceptions,
WorldData world,
float step
) {
@ -315,7 +314,14 @@ public class Collider {
for (Collideable coll : colls) {
coll.getCollideableVelocity(tmp);
tmp.mul(step);
float currentStep = step;
if (exceptions != null && (exceptions.a == coll || exceptions.b == coll)) {
currentStep *= TIME_STEP_COEFFICIENT_FOR_CURRENTLY_COLLIDING_BODIES;
}
tmp.mul(currentStep);
coll.moveAsCollideable(tmp);
}