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Support for kinematic_motion in StaticBody
Does the same thing as simulate motion from RigidBody in Kinematic mode, and CharacterBody (previously KinematicBody). Added support for constant linear/angular velocity with kinematic_motion in StaticBody, which moves the body in physics. Updated documentation for StaticBody and CharacterBody to describe their functionalities more accurately.
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@ -5,8 +5,8 @@
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</brief_description>
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<description>
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Character bodies are special types of bodies that are meant to be user-controlled. They are not affected by physics at all; to other types of bodies, such as a rigid body, these are the same as a static body. However, they have two main uses:
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[b]Simulated motion:[/b] When these bodies are moved manually, either from code or from an [AnimationPlayer] (with [member AnimationPlayer.playback_process_mode] set to "physics"), the physics will automatically compute an estimate of their linear and angular velocity. This makes them very useful for moving platforms or other AnimationPlayer-controlled objects (like a door, a bridge that opens, etc).
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[b]Kinematic characters:[/b] CharacterBody2D also has an API for moving objects (the [method PhysicsBody2D.move_and_collide] and [method move_and_slide] methods) while performing collision tests. This makes them really useful to implement characters that collide against a world, but don't require advanced physics.
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[b]Kinematic characters:[/b] Character bodies have an API for moving objects with walls and slopes detection ([method move_and_slide] method), in addition to collision detection (also done with [method PhysicsBody3D.move_and_collide]). This makes them really useful to implement characters that move in specific ways and collide with the world, but don't require advanced physics.
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[b]Kinematic motion:[/b] Character bodies can also be used for kinematic motion (same functionality as [member StaticBody3D.kinematic_motion] when enabled), which allows them to be moved by code and push other bodies on their path.
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</description>
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<tutorials>
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<link title="Kinematic character (2D)">https://docs.godotengine.org/en/latest/tutorials/physics/kinematic_character_2d.html</link>
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@ -5,8 +5,8 @@
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</brief_description>
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<description>
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Character bodies are special types of bodies that are meant to be user-controlled. They are not affected by physics at all; to other types of bodies, such as a rigid body, these are the same as a static body. However, they have two main uses:
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[b]Simulated motion:[/b] When these bodies are moved manually, either from code or from an [AnimationPlayer] (with [member AnimationPlayer.playback_process_mode] set to "physics"), the physics will automatically compute an estimate of their linear and angular velocity. This makes them very useful for moving platforms or other AnimationPlayer-controlled objects (like a door, a bridge that opens, etc).
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[b]Kinematic characters:[/b] CharacterBody3D also has an API for moving objects (the [method PhysicsBody3D.move_and_collide] and [method move_and_slide] methods) while performing collision tests. This makes them really useful to implement characters that collide against a world, but don't require advanced physics.
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[b]Kinematic characters:[/b] Character bodies have an API for moving objects with walls and slopes detection ([method move_and_slide] method), in addition to collision detection (also done with [method PhysicsBody3D.move_and_collide]). This makes them really useful to implement characters that move in specific ways and collide with the world, but don't require advanced physics.
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[b]Kinematic motion:[/b] Character bodies can also be used for kinematic motion (same functionality as [member StaticBody3D.kinematic_motion] when enabled), which allows them to be moved by code and push other bodies on their path.
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</description>
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<tutorials>
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<link title="Kinematic character (2D)">https://docs.godotengine.org/en/latest/tutorials/physics/kinematic_character_2d.html</link>
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@ -228,7 +228,7 @@
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Locked dynamic body mode. Similar to [constant MODE_DYNAMIC], but the body can not rotate.
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</constant>
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<constant name="MODE_KINEMATIC" value="3" enum="Mode">
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Kinematic body mode. The body behaves like a [StaticBody2D] with [code]kinematic_motion[/code] enabled, and must be moved by user code.
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Kinematic body mode. The body behaves like a [StaticBody2D] with [member StaticBody2D.kinematic_motion] enabled, and must be moved by user code.
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</constant>
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<constant name="CCD_MODE_DISABLED" value="0" enum="CCDMode">
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Continuous collision detection disabled. This is the fastest way to detect body collisions, but can miss small, fast-moving objects.
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@ -231,7 +231,7 @@
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Locked dynamic body mode. Similar to [constant MODE_DYNAMIC], but the body can not rotate.
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</constant>
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<constant name="MODE_KINEMATIC" value="3" enum="Mode">
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Kinematic body mode. The body behaves like a [StaticBody3D] with [code]kinematic_motion[/code] enabled, and can only move by user code.
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Kinematic body mode. The body behaves like a [StaticBody3D] with [member StaticBody3D.kinematic_motion] enabled, and can only move by user code.
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</constant>
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</constants>
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</class>
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@ -4,8 +4,11 @@
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Static body for 2D physics.
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</brief_description>
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<description>
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Static body for 2D physics. A StaticBody2D is a body that is not intended to move. It is ideal for implementing objects in the environment, such as walls or platforms.
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Additionally, a constant linear or angular velocity can be set for the static body, which will affect colliding bodies as if it were moving (for example, a conveyor belt).
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Static body for 2D physics. A static body is a simple body that can't be moved by external forces or contacts. It is ideal for implementing objects in the environment, such as walls or platforms. In contrast to [RigidBody2D], they don't consume any CPU resources as long as they don't move.
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They however have extra functionalities to move and affect other bodies:
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[b]Constant velocity:[/b] [member constant_linear_velocity] and [member constant_angular_velocity] can be set for the static body, so even if it doesn't move, it affects other bodies as if it was moving (this is useful for simulating conveyor belts or conveyor wheels).
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[b]Transform change:[/b] Static bodies can be also moved by code. Unless [member kinematic_motion] is enabled, they are just teleported in this case and don't affect other bodies on their path.
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[b]Kinematic motion:[/b] Static bodies can have [member kinematic_motion] enabled to make them kinematic bodies that can be moved by code and push other bodies on their path.
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</description>
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<tutorials>
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</tutorials>
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@ -13,10 +16,14 @@
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</methods>
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<members>
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<member name="constant_angular_velocity" type="float" setter="set_constant_angular_velocity" getter="get_constant_angular_velocity" default="0.0">
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The body's constant angular velocity. This does not rotate the body, but affects colliding bodies, as if it were rotating.
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The body's constant angular velocity. This does not rotate the body (unless [member kinematic_motion] is enabled), but affects other bodies that touch it, as if it were rotating.
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</member>
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<member name="constant_linear_velocity" type="Vector2" setter="set_constant_linear_velocity" getter="get_constant_linear_velocity" default="Vector2( 0, 0 )">
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The body's constant linear velocity. This does not move the body, but affects colliding bodies, as if it were moving.
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The body's constant linear velocity. This does not move the body (unless [member kinematic_motion] is enabled), but affects other bodies that touch it, as if it were moving.
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</member>
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<member name="kinematic_motion" type="bool" setter="set_kinematic_motion_enabled" getter="is_kinematic_motion_enabled" default="false">
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If [code]true[/code], the body will act the same as a [RigidBody2D] in [constant RigidBody2D.MODE_KINEMATIC] mode.
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When the body is moved manually, either from code or from an [AnimationPlayer] (with [member AnimationPlayer.playback_process_mode] set to [code]physics[/code]), the physics will automatically compute an estimate of their linear and angular velocity. This makes them very useful for moving platforms or other AnimationPlayer-controlled objects (like a door, a bridge that opens, etc).
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</member>
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<member name="physics_material_override" type="PhysicsMaterial" setter="set_physics_material_override" getter="get_physics_material_override">
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The physics material override for the body.
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@ -4,8 +4,11 @@
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Static body for 3D physics.
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</brief_description>
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<description>
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Static body for 3D physics. A static body is a simple body that is not intended to move. In contrast to [RigidBody3D], they don't consume any CPU resources as long as they don't move.
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Additionally, a constant linear or angular velocity can be set for the static body, so even if it doesn't move, it affects other bodies as if it was moving (this is useful for simulating conveyor belts or conveyor wheels).
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Static body for 3D physics. A static body is a simple body that can't be moved by external forces or contacts. It is ideal for implementing objects in the environment, such as walls or platforms. In contrast to [RigidBody3D], they don't consume any CPU resources as long as they don't move.
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They however have extra functionalities to move and affect other bodies:
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[b]Constant velocity:[/b] [member constant_linear_velocity] and [member constant_angular_velocity] can be set for the static body, so even if it doesn't move, it affects other bodies as if it was moving (this is useful for simulating conveyor belts or conveyor wheels).
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[b]Transform change:[/b] Static bodies can be also moved by code. Unless [member kinematic_motion] is enabled, they are just teleported in this case and don't affect other bodies on their path.
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[b]Kinematic motion:[/b] Static bodies can have [member kinematic_motion] enabled to make them kinematic bodies that can be moved by code and push other bodies on their path.
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</description>
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<tutorials>
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<link title="3D Physics Tests Demo">https://godotengine.org/asset-library/asset/675</link>
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@ -16,10 +19,14 @@
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</methods>
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<members>
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<member name="constant_angular_velocity" type="Vector3" setter="set_constant_angular_velocity" getter="get_constant_angular_velocity" default="Vector3( 0, 0, 0 )">
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The body's constant angular velocity. This does not rotate the body, but affects other bodies that touch it, as if it was in a state of rotation.
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The body's constant angular velocity. This does not rotate the body (unless [member kinematic_motion] is enabled), but affects other bodies that touch it, as if it were rotating.
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</member>
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<member name="constant_linear_velocity" type="Vector3" setter="set_constant_linear_velocity" getter="get_constant_linear_velocity" default="Vector3( 0, 0, 0 )">
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The body's constant linear velocity. This does not move the body, but affects other bodies that touch it, as if it was in a state of movement.
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The body's constant linear velocity. This does not move the body (unless [member kinematic_motion] is enabled), but affects other bodies that touch it, as if it were moving.
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</member>
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<member name="kinematic_motion" type="bool" setter="set_kinematic_motion_enabled" getter="is_kinematic_motion_enabled" default="false">
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If [code]true[/code], the body will act the same as a [RigidBody3D] in [constant RigidBody3D.MODE_KINEMATIC] mode.
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When the body is moved manually, either from code or from an [AnimationPlayer] (with [member AnimationPlayer.playback_process_mode] set to [code]physics[/code]), the physics will automatically compute an estimate of their linear and angular velocity. This makes them very useful for moving platforms or other AnimationPlayer-controlled objects (like a door, a bridge that opens, etc).
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</member>
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<member name="physics_material_override" type="PhysicsMaterial" setter="set_physics_material_override" getter="get_physics_material_override">
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The physics material override for the body.
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@ -146,12 +146,22 @@ void PhysicsBody2D::remove_collision_exception_with(Node *p_node) {
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void StaticBody2D::set_constant_linear_velocity(const Vector2 &p_vel) {
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constant_linear_velocity = p_vel;
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PhysicsServer2D::get_singleton()->body_set_state(get_rid(), PhysicsServer2D::BODY_STATE_LINEAR_VELOCITY, constant_linear_velocity);
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if (kinematic_motion) {
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_update_kinematic_motion();
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} else {
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PhysicsServer2D::get_singleton()->body_set_state(get_rid(), PhysicsServer2D::BODY_STATE_LINEAR_VELOCITY, constant_linear_velocity);
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}
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}
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void StaticBody2D::set_constant_angular_velocity(real_t p_vel) {
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constant_angular_velocity = p_vel;
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PhysicsServer2D::get_singleton()->body_set_state(get_rid(), PhysicsServer2D::BODY_STATE_ANGULAR_VELOCITY, constant_angular_velocity);
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if (kinematic_motion) {
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_update_kinematic_motion();
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} else {
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PhysicsServer2D::get_singleton()->body_set_state(get_rid(), PhysicsServer2D::BODY_STATE_ANGULAR_VELOCITY, constant_angular_velocity);
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}
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}
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Vector2 StaticBody2D::get_constant_linear_velocity() const {
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@ -181,27 +191,74 @@ Ref<PhysicsMaterial> StaticBody2D::get_physics_material_override() const {
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return physics_material_override;
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}
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void StaticBody2D::set_kinematic_motion_enabled(bool p_enabled) {
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if (p_enabled == kinematic_motion) {
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return;
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}
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kinematic_motion = p_enabled;
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if (kinematic_motion) {
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PhysicsServer2D::get_singleton()->body_set_mode(get_rid(), PhysicsServer2D::BODY_MODE_KINEMATIC);
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} else {
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PhysicsServer2D::get_singleton()->body_set_mode(get_rid(), PhysicsServer2D::BODY_MODE_STATIC);
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}
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_update_kinematic_motion();
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}
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bool StaticBody2D::is_kinematic_motion_enabled() const {
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return kinematic_motion;
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}
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void StaticBody2D::_notification(int p_what) {
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if (p_what == NOTIFICATION_INTERNAL_PHYSICS_PROCESS) {
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#ifdef TOOLS_ENABLED
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if (Engine::get_singleton()->is_editor_hint()) {
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return;
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}
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#endif
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ERR_FAIL_COND(!kinematic_motion);
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real_t delta_time = get_physics_process_delta_time();
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Transform2D new_transform = get_global_transform();
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new_transform.translate(constant_linear_velocity * delta_time);
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new_transform.set_rotation(new_transform.get_rotation() + constant_angular_velocity * delta_time);
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PhysicsServer2D::get_singleton()->body_set_state(get_rid(), PhysicsServer2D::BODY_STATE_TRANSFORM, new_transform);
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// Propagate transform change to node.
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set_block_transform_notify(true);
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set_global_transform(new_transform);
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set_block_transform_notify(false);
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}
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}
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void StaticBody2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_constant_linear_velocity", "vel"), &StaticBody2D::set_constant_linear_velocity);
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ClassDB::bind_method(D_METHOD("set_constant_angular_velocity", "vel"), &StaticBody2D::set_constant_angular_velocity);
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ClassDB::bind_method(D_METHOD("get_constant_linear_velocity"), &StaticBody2D::get_constant_linear_velocity);
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ClassDB::bind_method(D_METHOD("get_constant_angular_velocity"), &StaticBody2D::get_constant_angular_velocity);
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ClassDB::bind_method(D_METHOD("set_kinematic_motion_enabled", "enabled"), &StaticBody2D::set_kinematic_motion_enabled);
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ClassDB::bind_method(D_METHOD("is_kinematic_motion_enabled"), &StaticBody2D::is_kinematic_motion_enabled);
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ClassDB::bind_method(D_METHOD("set_physics_material_override", "physics_material_override"), &StaticBody2D::set_physics_material_override);
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ClassDB::bind_method(D_METHOD("get_physics_material_override"), &StaticBody2D::get_physics_material_override);
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "physics_material_override", PROPERTY_HINT_RESOURCE_TYPE, "PhysicsMaterial"), "set_physics_material_override", "get_physics_material_override");
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ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "constant_linear_velocity"), "set_constant_linear_velocity", "get_constant_linear_velocity");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "constant_angular_velocity"), "set_constant_angular_velocity", "get_constant_angular_velocity");
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "physics_material_override", PROPERTY_HINT_RESOURCE_TYPE, "PhysicsMaterial"), "set_physics_material_override", "get_physics_material_override");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "kinematic_motion"), "set_kinematic_motion_enabled", "is_kinematic_motion_enabled");
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}
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StaticBody2D::StaticBody2D() :
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PhysicsBody2D(PhysicsServer2D::BODY_MODE_STATIC) {
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}
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StaticBody2D::~StaticBody2D() {
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}
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void StaticBody2D::_reload_physics_characteristics() {
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if (physics_material_override.is_null()) {
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PhysicsServer2D::get_singleton()->body_set_param(get_rid(), PhysicsServer2D::BODY_PARAM_BOUNCE, 0);
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@ -212,6 +269,23 @@ void StaticBody2D::_reload_physics_characteristics() {
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}
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}
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void StaticBody2D::_update_kinematic_motion() {
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#ifdef TOOLS_ENABLED
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if (Engine::get_singleton()->is_editor_hint()) {
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return;
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}
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#endif
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if (kinematic_motion) {
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if (!Math::is_zero_approx(constant_angular_velocity) || !constant_linear_velocity.is_equal_approx(Vector2())) {
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set_physics_process_internal(true);
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return;
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}
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}
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set_physics_process_internal(false);
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}
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void RigidBody2D::_body_enter_tree(ObjectID p_id) {
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Object *obj = ObjectDB::get_instance(p_id);
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Node *node = Object::cast_to<Node>(obj);
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@ -72,7 +72,10 @@ class StaticBody2D : public PhysicsBody2D {
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Ref<PhysicsMaterial> physics_material_override;
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bool kinematic_motion = false;
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protected:
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void _notification(int p_what);
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static void _bind_methods();
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public:
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@ -86,10 +89,14 @@ public:
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real_t get_constant_angular_velocity() const;
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StaticBody2D();
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~StaticBody2D();
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private:
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void _reload_physics_characteristics();
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void _update_kinematic_motion();
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void set_kinematic_motion_enabled(bool p_enabled);
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bool is_kinematic_motion_enabled() const;
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};
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class RigidBody2D : public PhysicsBody2D {
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@ -206,14 +206,44 @@ Ref<PhysicsMaterial> StaticBody3D::get_physics_material_override() const {
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return physics_material_override;
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}
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void StaticBody3D::set_kinematic_motion_enabled(bool p_enabled) {
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if (p_enabled == kinematic_motion) {
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return;
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}
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kinematic_motion = p_enabled;
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if (kinematic_motion) {
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PhysicsServer3D::get_singleton()->body_set_mode(get_rid(), PhysicsServer3D::BODY_MODE_KINEMATIC);
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} else {
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PhysicsServer3D::get_singleton()->body_set_mode(get_rid(), PhysicsServer3D::BODY_MODE_STATIC);
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}
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_update_kinematic_motion();
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}
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bool StaticBody3D::is_kinematic_motion_enabled() const {
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return kinematic_motion;
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}
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void StaticBody3D::set_constant_linear_velocity(const Vector3 &p_vel) {
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constant_linear_velocity = p_vel;
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PhysicsServer3D::get_singleton()->body_set_state(get_rid(), PhysicsServer3D::BODY_STATE_LINEAR_VELOCITY, constant_linear_velocity);
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if (kinematic_motion) {
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_update_kinematic_motion();
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} else {
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PhysicsServer3D::get_singleton()->body_set_state(get_rid(), PhysicsServer3D::BODY_STATE_LINEAR_VELOCITY, constant_linear_velocity);
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}
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}
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void StaticBody3D::set_constant_angular_velocity(const Vector3 &p_vel) {
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constant_angular_velocity = p_vel;
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PhysicsServer3D::get_singleton()->body_set_state(get_rid(), PhysicsServer3D::BODY_STATE_ANGULAR_VELOCITY, constant_angular_velocity);
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if (kinematic_motion) {
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_update_kinematic_motion();
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} else {
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PhysicsServer3D::get_singleton()->body_set_state(get_rid(), PhysicsServer3D::BODY_STATE_ANGULAR_VELOCITY, constant_angular_velocity);
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}
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}
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Vector3 StaticBody3D::get_constant_linear_velocity() const {
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@ -224,26 +254,61 @@ Vector3 StaticBody3D::get_constant_angular_velocity() const {
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return constant_angular_velocity;
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}
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void StaticBody3D::_notification(int p_what) {
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if (p_what == NOTIFICATION_INTERNAL_PHYSICS_PROCESS) {
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#ifdef TOOLS_ENABLED
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if (Engine::get_singleton()->is_editor_hint()) {
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return;
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}
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#endif
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ERR_FAIL_COND(!kinematic_motion);
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real_t delta_time = get_physics_process_delta_time();
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Transform3D new_transform = get_global_transform();
|
||||
new_transform.origin += constant_linear_velocity * delta_time;
|
||||
|
||||
real_t ang_vel = constant_angular_velocity.length();
|
||||
if (!Math::is_zero_approx(ang_vel)) {
|
||||
Vector3 ang_vel_axis = constant_angular_velocity / ang_vel;
|
||||
Basis rot(ang_vel_axis, ang_vel * delta_time);
|
||||
new_transform.basis = rot * new_transform.basis;
|
||||
new_transform.orthonormalize();
|
||||
}
|
||||
|
||||
PhysicsServer3D::get_singleton()->body_set_state(get_rid(), PhysicsServer3D::BODY_STATE_TRANSFORM, new_transform);
|
||||
|
||||
// Propagate transform change to node.
|
||||
set_ignore_transform_notification(true);
|
||||
set_global_transform(new_transform);
|
||||
set_ignore_transform_notification(false);
|
||||
_on_transform_changed();
|
||||
}
|
||||
}
|
||||
|
||||
void StaticBody3D::_bind_methods() {
|
||||
ClassDB::bind_method(D_METHOD("set_constant_linear_velocity", "vel"), &StaticBody3D::set_constant_linear_velocity);
|
||||
ClassDB::bind_method(D_METHOD("set_constant_angular_velocity", "vel"), &StaticBody3D::set_constant_angular_velocity);
|
||||
ClassDB::bind_method(D_METHOD("get_constant_linear_velocity"), &StaticBody3D::get_constant_linear_velocity);
|
||||
ClassDB::bind_method(D_METHOD("get_constant_angular_velocity"), &StaticBody3D::get_constant_angular_velocity);
|
||||
|
||||
ClassDB::bind_method(D_METHOD("set_kinematic_motion_enabled", "enabled"), &StaticBody3D::set_kinematic_motion_enabled);
|
||||
ClassDB::bind_method(D_METHOD("is_kinematic_motion_enabled"), &StaticBody3D::is_kinematic_motion_enabled);
|
||||
|
||||
ClassDB::bind_method(D_METHOD("set_physics_material_override", "physics_material_override"), &StaticBody3D::set_physics_material_override);
|
||||
ClassDB::bind_method(D_METHOD("get_physics_material_override"), &StaticBody3D::get_physics_material_override);
|
||||
|
||||
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "physics_material_override", PROPERTY_HINT_RESOURCE_TYPE, "PhysicsMaterial"), "set_physics_material_override", "get_physics_material_override");
|
||||
ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "constant_linear_velocity"), "set_constant_linear_velocity", "get_constant_linear_velocity");
|
||||
ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "constant_angular_velocity"), "set_constant_angular_velocity", "get_constant_angular_velocity");
|
||||
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "kinematic_motion"), "set_kinematic_motion_enabled", "is_kinematic_motion_enabled");
|
||||
}
|
||||
|
||||
StaticBody3D::StaticBody3D() :
|
||||
PhysicsBody3D(PhysicsServer3D::BODY_MODE_STATIC) {
|
||||
}
|
||||
|
||||
StaticBody3D::~StaticBody3D() {}
|
||||
|
||||
void StaticBody3D::_reload_physics_characteristics() {
|
||||
if (physics_material_override.is_null()) {
|
||||
PhysicsServer3D::get_singleton()->body_set_param(get_rid(), PhysicsServer3D::BODY_PARAM_BOUNCE, 0);
|
||||
@ -254,6 +319,23 @@ void StaticBody3D::_reload_physics_characteristics() {
|
||||
}
|
||||
}
|
||||
|
||||
void StaticBody3D::_update_kinematic_motion() {
|
||||
#ifdef TOOLS_ENABLED
|
||||
if (Engine::get_singleton()->is_editor_hint()) {
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (kinematic_motion) {
|
||||
if (!constant_angular_velocity.is_equal_approx(Vector3()) || !constant_linear_velocity.is_equal_approx(Vector3())) {
|
||||
set_physics_process_internal(true);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
set_physics_process_internal(false);
|
||||
}
|
||||
|
||||
void RigidBody3D::_body_enter_tree(ObjectID p_id) {
|
||||
Object *obj = ObjectDB::get_instance(p_id);
|
||||
Node *node = Object::cast_to<Node>(obj);
|
||||
|
@ -82,7 +82,10 @@ class StaticBody3D : public PhysicsBody3D {
|
||||
|
||||
Ref<PhysicsMaterial> physics_material_override;
|
||||
|
||||
bool kinematic_motion = false;
|
||||
|
||||
protected:
|
||||
void _notification(int p_what);
|
||||
static void _bind_methods();
|
||||
|
||||
public:
|
||||
@ -96,10 +99,14 @@ public:
|
||||
Vector3 get_constant_angular_velocity() const;
|
||||
|
||||
StaticBody3D();
|
||||
~StaticBody3D();
|
||||
|
||||
private:
|
||||
void _reload_physics_characteristics();
|
||||
|
||||
void _update_kinematic_motion();
|
||||
|
||||
void set_kinematic_motion_enabled(bool p_enabled);
|
||||
bool is_kinematic_motion_enabled() const;
|
||||
};
|
||||
|
||||
class RigidBody3D : public PhysicsBody3D {
|
||||
|
Loading…
Reference in New Issue
Block a user