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feat: new linear damping behaviour

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MihailRis 2026-03-13 02:53:43 +03:00
parent f4e55f9938
commit 06d03f889c
1 changed files with 13 additions and 12 deletions
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25
src/physics/PhysicsSolver.cpp
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@ -30,14 +30,15 @@ static float calc_step_height(
AABB aabb(-half, +half);
aabb.scale(glm::vec3(1.0f - E * 2, 1.0f, 1.0f - E * 2));
aabb = aabb + pos + glm::vec3(0.0f, stepHeight, 0.0f);
if (stepHeight > 0.0f) {
for (int ix = 0; ix <= glm::ceil((half.x - E) * 2); ix++) {
float x = (pos.x - half.x) + ix;
for (int iz = 0; iz <= glm::ceil((half.z - E) * 2); iz++) {
float z = (pos.z - half.z) + iz;
if (chunks.isObstacleAt(x, pos.y + half.y + stepHeight, z, aabb)) {
return 0.0f;
}
if (stepHeight <= 0.0f) {
return stepHeight;
}
for (int ix = 0; ix <= glm::ceil((half.x - E) * 2); ix++) {
float x = (pos.x - half.x) + ix;
for (int iz = 0; iz <= glm::ceil((half.z - E) * 2); iz++) {
float z = (pos.z - half.z) + iz;
if (chunks.isObstacleAt(x, pos.y + half.y + stepHeight, z, aabb)) {
return 0.0f;
}
}
}
@ -293,11 +294,9 @@ void PhysicsSolver::calcSubstep(
int substeps
) {
if (glm::length2(hitbox.groundVelocity) > 1e-6f) {
pos.x += hitbox.groundVelocity.x;
if (hitbox.groundVelocity.y < 0.0f) {
pos.y += hitbox.groundVelocity.y;
}
pos.z += hitbox.groundVelocity.z;
}
auto initpos = pos;
@ -386,8 +385,10 @@ void PhysicsSolver::step(
float linearDamping = hitbox->linearDamping * hitbox->friction;
glm::vec3& vel = hitbox->velocity;
vel.x /= 1.0f + delta * linearDamping;
vel.z /= 1.0f + delta * linearDamping;
auto diff = hitbox->groundVelocity / dt - vel;
vel.x += diff.x * delta * linearDamping;
vel.z += diff.z * delta * linearDamping;
if (hitbox->verticalDamping > 0.0f) {
vel.y /= 1.0f + delta * linearDamping * hitbox->verticalDamping;
}