60 lines
4.7 KiB
XML
60 lines
4.7 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="GPUParticlesCollisionHeightField3D" inherits="GPUParticlesCollision3D" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
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<brief_description>
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Real-time heightmap-shaped 3D particle attractor affecting [GPUParticles3D] nodes.
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</brief_description>
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<description>
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Real-time heightmap-shaped 3D particle attractor affecting [GPUParticles3D] nodes.
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Heightmap shapes allow for efficiently representing collisions for convex and concave objects with a single "floor" (such as terrain). This is less flexible than [GPUParticlesCollisionSDF3D], but it doesn't require a baking step.
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[GPUParticlesCollisionHeightField3D] can also be regenerated in real-time when it is moved, when the camera moves, or even continuously. This makes [GPUParticlesCollisionHeightField3D] a good choice for weather effects such as rain and snow and games with highly dynamic geometry. However, since heightmaps cannot represent overhangs, [GPUParticlesCollisionHeightField3D] is not suited for indoor particle collision.
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[b]Note:[/b] [member ParticleProcessMaterial.collision_mode] must be [code]true[/code] on the [GPUParticles3D]'s process material for collision to work.
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[b]Note:[/b] Particle collision only affects [GPUParticles3D], not [CPUParticles3D].
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</description>
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<tutorials>
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</tutorials>
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<members>
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<member name="extents" type="Vector3" setter="set_extents" getter="get_extents" default="Vector3(1, 1, 1)">
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The collision heightmap's extents in 3D units. To improve heightmap quality, [member extents] should be set as small as possible while covering the parts of the scene you need.
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</member>
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<member name="follow_camera_enabled" type="bool" setter="set_follow_camera_enabled" getter="is_follow_camera_enabled" default="false">
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If [code]true[/code], the [GPUParticlesCollisionHeightField3D] will follow the current camera in global space. The [GPUParticlesCollisionHeightField3D] does not need to be a child of the [Camera3D] node for this to work.
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Following the camera has a performance cost, as it will force the heightmap to update whenever the camera moves. Consider lowering [member resolution] to improve performance if [member follow_camera_enabled] is [code]true[/code].
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</member>
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<member name="resolution" type="int" setter="set_resolution" getter="get_resolution" enum="GPUParticlesCollisionHeightField3D.Resolution" default="2">
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Higher resolutions can represent small details more accurately in large scenes, at the cost of lower performance. If [member update_mode] is [constant UPDATE_MODE_ALWAYS], consider using the lowest resolution possible.
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</member>
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<member name="update_mode" type="int" setter="set_update_mode" getter="get_update_mode" enum="GPUParticlesCollisionHeightField3D.UpdateMode" default="0">
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The update policy to use for the generated heightmap.
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</member>
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</members>
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<constants>
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<constant name="RESOLUTION_256" value="0" enum="Resolution">
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Generate a 256×256 heightmap. Intended for small-scale scenes, or larger scenes with no distant particles.
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</constant>
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<constant name="RESOLUTION_512" value="1" enum="Resolution">
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Generate a 512×512 heightmap. Intended for medium-scale scenes, or larger scenes with no distant particles.
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</constant>
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<constant name="RESOLUTION_1024" value="2" enum="Resolution">
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Generate a 1024×1024 heightmap. Intended for large scenes with distant particles.
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</constant>
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<constant name="RESOLUTION_2048" value="3" enum="Resolution">
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Generate a 2048×2048 heightmap. Intended for very large scenes with distant particles.
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</constant>
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<constant name="RESOLUTION_4096" value="4" enum="Resolution">
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Generate a 4096×4096 heightmap. Intended for huge scenes with distant particles.
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</constant>
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<constant name="RESOLUTION_8192" value="5" enum="Resolution">
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Generate a 8192×8192 heightmap. Intended for gigantic scenes with distant particles.
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</constant>
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<constant name="RESOLUTION_MAX" value="6" enum="Resolution">
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Represents the size of the [enum Resolution] enum.
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</constant>
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<constant name="UPDATE_MODE_WHEN_MOVED" value="0" enum="UpdateMode">
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Only update the heightmap when the [GPUParticlesCollisionHeightField3D] node is moved, or when the camera moves if [member follow_camera_enabled] is [code]true[/code]. An update can be forced by slightly moving the [GPUParticlesCollisionHeightField3D] in any direction.
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</constant>
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<constant name="UPDATE_MODE_ALWAYS" value="1" enum="UpdateMode">
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Update the heightmap every frame. This has a significant performance cost. This update should only be used when geometry that particles can collide with changes significantly during gameplay.
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</constant>
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</constants>
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</class>
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