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make pelvis get lower when legs are stretched

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Teatov
2025-07-18 20:48:01 +10:00
parent 19ba70e1e1
commit 485e38b424
1 changed files with 12 additions and 0 deletions
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12
scripts/mech_skeleton_modifier.gd
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@@ -6,9 +6,12 @@ class_name MechSkeletonModifier extends SkeletonModifier3D
@export var _ankle_bone_r: String = "Ankle_R"
@export var _leg_ik_target_r: Node3D
@export var _feet_stretch_pelvis_lowering_factor: float = 0.3
var _skeleton: Skeleton3D
var _pelvis_rest_y: float
var _feet_rest_distance: float
func _ready() -> void:
@@ -23,6 +26,7 @@ func _ready() -> void:
_pelvis_rest_y = (
pelvis_rest.origin.y - (ankle_rest_l.origin.y + ankle_rest_r.origin.y) / 2
)
_feet_rest_distance = ankle_rest_l.origin.distance_to(ankle_rest_r.origin)
func _process_modification() -> void:
@@ -38,5 +42,13 @@ func _process_modification() -> void:
var pelvis_pos := (leg_target_pos_l + leg_target_pos_r) / 2
pelvis_pos.y = minf(leg_target_pos_l.y, leg_target_pos_r.y) + _pelvis_rest_y
var feet_distance := (leg_target_pos_l * Vector3(1, 0, 1)).distance_to(
leg_target_pos_r * Vector3(1, 0, 1)
)
var feet_stretch_pelvis_lowering := (
(feet_distance - _feet_rest_distance) * _feet_stretch_pelvis_lowering_factor
)
pelvis_pos.y -= clampf(feet_stretch_pelvis_lowering, 0, _pelvis_rest_y)
pelvis_bone_pose.origin = pelvis_pos
_skeleton.set_bone_global_pose(pelvis_bone, pelvis_bone_pose)