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# This file is part of Korman.
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#
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# Korman is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Korman is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Korman. If not, see <http://www.gnu.org/licenses/>.
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import bmesh
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import bpy
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import itertools
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import mathutils
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from PyHSPlasma import *
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import weakref
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from .explosions import ExportError, ExportAssertionError
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from ..helpers import bmesh_from_object, TemporaryObject
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from . import utils
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def _set_phys_prop(prop, sim, phys, value=True):
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"""Sets properties on plGenericPhysical and plSimulationInterface (seeing as how they are duped)"""
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sim.setProperty(prop, value)
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phys.setProperty(prop, value)
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class PhysicsConverter:
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def __init__(self, exporter):
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self._exporter = weakref.ref(exporter)
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self._bounds_converters = {
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"box": self._export_box,
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"sphere": self._export_sphere,
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"hull": self._export_hull,
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"trimesh": self._export_trimesh,
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}
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def _apply_props(self, simIface, physical, props):
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for i in props.get("properties", []):
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_set_phys_prop(getattr(plSimulationInterface, i), simIface, physical)
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for i in props.get("losdbs", []):
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physical.LOSDBs |= getattr(plSimDefs, i)
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for i in props.get("report_groups", []):
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physical.reportGroup |= 1 << getattr(plSimDefs, i)
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for i in props.get("collide_groups", []):
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physical.collideGroup |= 1 << getattr(plSimDefs, i)
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def _convert_indices(self, mesh):
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indices = []
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for face in mesh.tessfaces:
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v = face.vertices
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if len(v) == 3:
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indices += v
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elif len(v) == 4:
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indices += (v[0], v[1], v[2],)
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indices += (v[0], v[2], v[3],)
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return indices
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def _convert_mesh_data(self, bo, physical, local_space, mat, indices=True):
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mesh = bo.to_mesh(bpy.context.scene, True, "RENDER", calc_tessface=False)
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with TemporaryObject(mesh, bpy.data.meshes.remove):
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if local_space:
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mesh.update(calc_tessface=indices)
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physical.pos = hsVector3(*mat.to_translation())
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physical.rot = utils.quaternion(mat.to_quaternion())
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# Physicals can't have scale...
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scale = mat.to_scale()
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if scale[0] == 1.0 and scale[1] == 1.0 and scale[2] == 1.0:
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# Whew, don't need to do any math!
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vertices = [hsVector3(*i.co) for i in mesh.vertices]
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else:
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# Dagnabbit...
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vertices = [hsVector3(i.co.x * scale.x, i.co.y * scale.y, i.co.z * scale.z) for i in mesh.vertices]
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else:
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# apply the transform to the physical itself
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utils.transform_mesh(mesh, mat)
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mesh.update(calc_tessface=indices)
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vertices = [hsVector3(*i.co) for i in mesh.vertices]
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if indices:
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return (vertices, self._convert_indices(mesh))
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else:
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return vertices
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def generate_flat_proxy(self, bo, so, **kwargs):
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"""Generates a flat physical object"""
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z_coord = kwargs.pop("z_coord", None)
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if so.sim is None:
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simIface = self._mgr.add_object(pl=plSimulationInterface, bl=bo)
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physical = self._mgr.add_object(pl=plGenericPhysical, bl=bo)
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simIface.physical = physical.key
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physical.object = so.key
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physical.sceneNode = self._mgr.get_scene_node(bl=bo)
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mesh = bo.to_mesh(bpy.context.scene, True, "RENDER", calc_tessface=False)
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with TemporaryObject(mesh, bpy.data.meshes.remove):
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# No mass and no emedded xform, so we force worldspace collision.
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utils.transform_mesh(mesh, bo.matrix_world)
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mesh.update(calc_tessface=True)
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if z_coord is None:
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# Ensure all vertices are coplanar
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z_coords = [i.co.z for i in mesh.vertices]
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delta = max(z_coords) - min(z_coords)
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if delta > 0.0002:
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raise ExportAssertionError()
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vertices = [hsVector3(*i.co) for i in mesh.vertices]
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else:
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# Flatten out all points to the given Z-coordinate
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vertices = [hsVector3(i.co.x, i.co.y, z_coord) for i in mesh.vertices]
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physical.verts = vertices
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physical.indices = self._convert_indices(mesh)
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physical.boundsType = plSimDefs.kProxyBounds
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group_name = kwargs.get("member_group")
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if group_name:
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physical.memberGroup = getattr(plSimDefs, group_name)
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else:
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simIface = so.sim.object
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physical = simIface.physical.object
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member_group = getattr(plSimDefs, kwargs.get("member_group", "kGroupLOSOnly"))
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if physical.memberGroup != member_group and member_group != plSimDefs.kGroupLOSOnly:
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self._report.warn("{}: Physical memberGroup overwritten!", bo.name)
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physical.memberGroup = member_group
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self._apply_props(simIface, physical, kwargs)
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def generate_physical(self, bo, so, **kwargs):
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"""Generates a physical object for the given object pair.
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The following optional arguments are allowed:
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- bounds: (defaults to collision modifier setting)
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- member_group: str attribute of plSimDefs, defaults to kGroupStatic
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NOTE that kGroupLOSOnly generation will only succeed if no one else
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has generated this physical in another group
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- properties: sequence of str bit names from plSimulationInterface
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- losdbs: sequence of str bit names from plSimDefs
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- report_groups: sequence of str bit names from plSimDefs
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- collide_groups: sequence of str bit names from plSimDefs
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"""
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if so.sim is None:
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simIface = self._mgr.add_object(pl=plSimulationInterface, bl=bo)
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physical = self._mgr.add_object(pl=plGenericPhysical, bl=bo)
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ver = self._mgr.getVer()
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simIface.physical = physical.key
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physical.object = so.key
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physical.sceneNode = self._mgr.get_scene_node(bl=bo)
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# Got subworlds?
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subworld = bo.plasma_object.subworld
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if self.is_dedicated_subworld(subworld, sanity_check=False):
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physical.subWorld = self._mgr.find_create_key(plHKSubWorld, bl=subworld)
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# Export the collision modifier here since we like stealing from it anyway.
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mod = bo.plasma_modifiers.collision
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bounds = kwargs.get("bounds", mod.bounds)
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if mod.enabled:
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physical.friction = mod.friction
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physical.restitution = mod.restitution
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if mod.dynamic:
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if ver <= pvPots:
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physical.collideGroup = (1 << plSimDefs.kGroupDynamic) | \
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(1 << plSimDefs.kGroupStatic)
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physical.memberGroup = plSimDefs.kGroupDynamic
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physical.mass = mod.mass
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_set_phys_prop(plSimulationInterface.kStartInactive, simIface, physical,
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value=mod.start_asleep)
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elif not mod.avatar_blocker:
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physical.memberGroup = plSimDefs.kGroupLOSOnly
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else:
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physical.memberGroup = plSimDefs.kGroupStatic
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# Line of Sight DB
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if mod.camera_blocker:
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physical.LOSDBs |= plSimDefs.kLOSDBCameraBlockers
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_set_phys_prop(plSimulationInterface.kCameraAvoidObject, simIface, physical)
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if mod.terrain:
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physical.LOSDBs |= plSimDefs.kLOSDBAvatarWalkable
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# Hacky? We'd like to share the simple surface descriptors(TM) as much as possible...
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# This could result in a few orphaned PhysicalSndGroups, but I think that's preferable
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# to having a bunch of empty objects...?
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if mod.surface != "kNone":
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sndgroup = self._mgr.find_create_object(plPhysicalSndGroup, so=so, name="SURFACEGEN_{}".format(mod.surface))
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sndgroup.group = getattr(plPhysicalSndGroup, mod.surface)
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physical.soundGroup = sndgroup.key
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else:
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group_name = kwargs.get("member_group")
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if group_name:
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physical.memberGroup = getattr(plSimDefs, group_name)
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# Ensure this thing is set up properly for animations.
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# This was previously the collision modifier's postexport method, but that
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# would miss cases where we have animated detectors (subworlds!!!)
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def _iter_object_tree(bo, stop_at_subworld):
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while bo is not None:
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if stop_at_subworld and self.is_dedicated_subworld(bo, sanity_check=False):
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return
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yield bo
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bo = bo.parent
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for i in _iter_object_tree(bo, ver == pvMoul):
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if i.plasma_object.has_transform_animation:
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tree_xformed = True
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break
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else:
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tree_xformed = False
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if tree_xformed:
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bo_xformed = bo.plasma_object.has_transform_animation
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# Always pin these objects - otherwise they may start falling through the floor.
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# Unless you've marked it kickable...
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if not mod.dynamic:
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_set_phys_prop(plSimulationInterface.kPinned, simIface, physical)
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# MOUL: only objects that have animation data are kPhysAnim
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if ver != pvMoul or bo_xformed:
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_set_phys_prop(plSimulationInterface.kPhysAnim, simIface, physical)
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# Any physical that is parented by not kickable (dynamic) is passive -
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# meaning we don't need to report back any changes from physics. Same for
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# plFilterCoordInterface, which filters out some axes.
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if (bo.parent is not None and not mod.dynamic) or bo.plasma_object.ci_type == plFilterCoordInterface:
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_set_phys_prop(plSimulationInterface.kPassive, simIface, physical)
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# If the mass is zero, then we will fail to animate. Fix that.
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if physical.mass == 0.0:
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physical.mass = 1.0
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# Different Plasma versions have different ways they expect to get physical transforms.
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# With Havok, massless objects are in absolute worldspace while massed (movable) objects
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# are in object-local space.
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# In PhysX, objects with a coordinate interface are in local to SUBWORLD space, otherwise
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# they are in absolute worldspace.
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if ver <= pvPots:
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local_space, mat = physical.mass > 0.0, bo.matrix_world
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elif ver == pvMoul:
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if self._exporter().has_coordiface(bo):
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local_space = True
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mat = subworld.matrix_world.inverted() * bo.matrix_world if subworld else bo.matrix_world
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else:
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local_space, mat = False, bo.matrix_world
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else:
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raise NotImplementedError("ODE physical transform")
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self._bounds_converters[bounds](bo, physical, local_space, mat)
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else:
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simIface = so.sim.object
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physical = simIface.physical.object
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member_group = getattr(plSimDefs, kwargs.get("member_group", "kGroupLOSOnly"))
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if physical.memberGroup != member_group and member_group != plSimDefs.kGroupLOSOnly:
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self._report.warn("{}: Physical memberGroup overwritten!", bo.name, indent=2)
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physical.memberGroup = member_group
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self._apply_props(simIface, physical, kwargs)
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def _export_box(self, bo, physical, local_space, mat):
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"""Exports box bounds based on the object"""
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physical.boundsType = plSimDefs.kBoxBounds
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vertices = self._convert_mesh_data(bo, physical, local_space, mat, indices=False)
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physical.calcBoxBounds(vertices)
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def _export_hull(self, bo, physical, local_space, mat):
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"""Exports convex hull bounds based on the object"""
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physical.boundsType = plSimDefs.kHullBounds
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# Only certain builds of libHSPlasma are able to take artist generated triangle soups and
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# bake them to convex hulls. Specifically, Windows 32-bit w/PhysX 2.6. Everything else just
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# needs to have us provide some friendlier data...
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with bmesh_from_object(bo) as mesh:
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if local_space:
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physical.pos = hsVector3(*mat.to_translation())
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physical.rot = utils.quaternion(mat.to_quaternion())
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bmesh.ops.scale(mesh, vec=mat.to_scale(), verts=mesh.verts)
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else:
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mesh.transform(mat)
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result = bmesh.ops.convex_hull(mesh, input=mesh.verts, use_existing_faces=False)
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BMVert = bmesh.types.BMVert
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verts = itertools.takewhile(lambda x: isinstance(x, BMVert), result["geom"])
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physical.verts = [hsVector3(*i.co) for i in verts]
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def _export_sphere(self, bo, physical, local_space, mat):
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"""Exports sphere bounds based on the object"""
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physical.boundsType = plSimDefs.kSphereBounds
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vertices = self._convert_mesh_data(bo, physical, local_space, mat, indices=False)
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physical.calcSphereBounds(vertices)
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def _export_trimesh(self, bo, physical, local_space, mat):
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"""Exports an object's mesh as exact physical bounds"""
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# Triangle meshes MAY optionally specify a proxy object to fetch the triangles from...
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mod = bo.plasma_modifiers.collision
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if mod.enabled and mod.proxy_object is not None:
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physical.boundsType = plSimDefs.kProxyBounds
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vertices, indices = self._convert_mesh_data(mod.proxy_object, physical, local_space, mat)
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else:
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physical.boundsType = plSimDefs.kExplicitBounds
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vertices, indices = self._convert_mesh_data(bo, physical, local_space, mat)
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physical.verts = vertices
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physical.indices = indices
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def is_dedicated_subworld(self, bo, sanity_check=True):
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"""Determines if a subworld object defines an alternate physics world"""
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if bo is None:
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return False
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subworld_mod = bo.plasma_modifiers.subworld_def
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if not subworld_mod.enabled:
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if sanity_check:
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raise ExportError("'{}' is not a subworld".format(bo.name))
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else:
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return False
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return subworld_mod.is_dedicated_subworld(self._exporter())
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@property
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def _mgr(self):
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return self._exporter().mgr
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@property
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def _report(self):
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return self._exporter().report
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