rigidbody: Add rigid body simulation
Add operators to add/remove rigid body world and objects. Add UI scripts. The rigid body simulation works on scene level and overrides the position/orientation of rigid bodies when active. It does not deform meshes or generate data so there is no modifier. Usage: * Add rigid body world in the scene tab * Create a group * Add objects to the group * Assign group to the rigid body world * Play animation For convenience the rigid body tools operators in the tools panel of the 3d view will add a world, group and add objects to the group automatically so you only have to press one button to add/remove rigid bodies to the simulation. Part of GSoC 2010 and 2012. Authors: Joshua Leung (aligorith), Sergej Reich (sergof)
This commit is contained in:
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source/blender/editors/physics/rigidbody_object.c
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622
source/blender/editors/physics/rigidbody_object.c
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/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2013 Blender Foundation
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Joshua Leung, Sergej Reich
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file rigidbody_object.c
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* \ingroup editor_physics
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* \brief Rigid Body object editing operators
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "MEM_guardedalloc.h"
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#include "DNA_group_types.h"
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#include "DNA_object_types.h"
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#include "DNA_mesh_types.h"
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#include "DNA_rigidbody_types.h"
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#include "DNA_scene_types.h"
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#include "BLI_blenlib.h"
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#include "BLI_math.h"
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#include "BKE_context.h"
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#include "BKE_depsgraph.h"
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#include "BKE_group.h"
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#include "BKE_object.h"
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#include "BKE_report.h"
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#include "BKE_rigidbody.h"
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#include "RNA_access.h"
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#include "RNA_define.h"
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#include "RNA_enum_types.h"
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#include "WM_api.h"
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#include "WM_types.h"
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#include "ED_physics.h"
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#include "ED_screen.h"
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#include "physics_intern.h"
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/* ********************************************** */
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/* Helper API's for RigidBody Objects Editing */
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static int ED_operator_rigidbody_active_poll(bContext *C)
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{
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if (ED_operator_object_active_editable(C)) {
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Object *ob = CTX_data_active_object(C);
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return (ob && ob->rigidbody_object);
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}
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else
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return 0;
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}
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static int ED_operator_rigidbody_add_poll(bContext *C)
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{
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if (ED_operator_object_active_editable(C)) {
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Object *ob = CTX_data_active_object(C);
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return (ob && ob->type == OB_MESH);
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}
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else
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return 0;
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}
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/* ----------------- */
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void ED_rigidbody_ob_add(wmOperator *op, Scene *scene, Object *ob, int type)
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{
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/* check that object doesn't already belong to the current simulation */
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if (ob->rigidbody_object) {
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BKE_reportf(op->reports, RPT_INFO, "Object '%s' already has a Rigid Body", ob->id.name + 2);
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return;
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}
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if (ob->type != OB_MESH) {
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BKE_report(op->reports, RPT_ERROR, "Can't add Rigid Body to non mesh object");
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return;
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}
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if (((Mesh *)ob->data)->totpoly == 0) {
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BKE_report(op->reports, RPT_ERROR, "Can't create Rigid Body from mesh with no polygons");
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return;
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}
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/* make rigidbody object settings */
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ob->rigidbody_object = BKE_rigidbody_create_object(scene, ob, type);
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ob->rigidbody_object->flag |= RBO_FLAG_NEEDS_VALIDATE;
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}
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void ED_rigidbody_ob_remove(Scene *scene, Object *ob)
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{
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BKE_rigidbody_remove_object(scene, ob);
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DAG_id_tag_update(&ob->id, OB_RECALC_OB);
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}
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/* ********************************************** */
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/* Active Object Add/Remove Operators */
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/* ************ Add Rigid Body ************** */
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static int rigidbody_ob_add_exec(bContext *C, wmOperator *op)
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{
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Scene *scene = CTX_data_scene(C);
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Object *ob = (scene) ? OBACT : NULL;
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int type = RNA_enum_get(op->ptr, "type");
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/* apply to active object */
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ED_rigidbody_ob_add(op, scene, ob, type);
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/* send updates */
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DAG_ids_flush_update(CTX_data_main(C), 0);
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WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
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WM_event_add_notifier(C, NC_GROUP | NA_EDITED, NULL);
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/* done */
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return OPERATOR_FINISHED;
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}
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void RIGIDBODY_OT_object_add(wmOperatorType *ot)
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{
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/* identifiers */
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ot->idname = "RIGIDBODY_OT_object_add";
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ot->name = "Add Rigid Body";
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ot->description = "Add active object as Rigid Body";
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/* callbacks */
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ot->exec = rigidbody_ob_add_exec;
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ot->poll = ED_operator_rigidbody_add_poll;
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/* flags */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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/* properties */
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ot->prop = RNA_def_enum(ot->srna, "type", rigidbody_ob_type_items, RBO_TYPE_ACTIVE, "Rigid Body Type", "");
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}
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/* ************ Remove Rigid Body ************** */
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static int rigidbody_ob_remove_exec(bContext *C, wmOperator *op)
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{
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Scene *scene = CTX_data_scene(C);
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Object *ob = (scene) ? OBACT : NULL;
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/* sanity checks */
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if (scene == NULL)
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return OPERATOR_CANCELLED;
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/* apply to active object */
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if (ELEM(NULL, ob, ob->rigidbody_object)) {
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BKE_report(op->reports, RPT_ERROR, "Object has no Rigid Body settings to remove");
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return OPERATOR_CANCELLED;
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}
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else
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ED_rigidbody_ob_remove(scene, ob);
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/* send updates */
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DAG_ids_flush_update(CTX_data_main(C), 0);
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WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
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WM_event_add_notifier(C, NC_GROUP | NA_EDITED, NULL);
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/* done */
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return OPERATOR_FINISHED;
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}
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void RIGIDBODY_OT_object_remove(wmOperatorType *ot)
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{
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/* identifiers */
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ot->idname = "RIGIDBODY_OT_object_remove";
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ot->name = "Remove Rigid Body";
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ot->description = "Remove Rigid Body settings from Object";
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/* callbacks */
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ot->exec = rigidbody_ob_remove_exec;
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ot->poll = ED_operator_rigidbody_active_poll;
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/* flags */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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}
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/* ********************************************** */
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/* Selected Object Add/Remove Operators */
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/* ************ Add Rigid Bodies ************** */
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static int rigidbody_obs_add_exec(bContext *C, wmOperator *op)
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{
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Scene *scene = CTX_data_scene(C);
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RigidBodyWorld *rbw = BKE_rigidbody_get_world(scene);
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int type = RNA_enum_get(op->ptr, "type");
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/* sanity check */
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if (scene == NULL) {
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BKE_report(op->reports, RPT_ERROR, "No Scene to add Rigid Bodies to");
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return OPERATOR_CANCELLED;
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}
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/* Add rigid body world and group if they don't exist for convenience */
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if (rbw == NULL) {
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rbw = BKE_rigidbody_create_world(scene);
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BKE_rigidbody_validate_sim_world(scene, rbw, false);
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scene->rigidbody_world = rbw;
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}
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if (rbw->group == NULL) {
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rbw->group = add_group("RigidBodyWorld");
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}
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/* create rigid body objects and add them to the world's group */
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CTX_DATA_BEGIN(C, Object *, ob, selected_objects) {
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ED_rigidbody_ob_add(op, scene, ob, type);
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add_to_group(rbw->group, ob, scene, NULL);
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}
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CTX_DATA_END;
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/* send updates */
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DAG_ids_flush_update(CTX_data_main(C), 0);
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WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
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WM_event_add_notifier(C, NC_GROUP | NA_EDITED, NULL);
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/* done */
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return OPERATOR_FINISHED;
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}
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void RIGIDBODY_OT_objects_add(wmOperatorType *ot)
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{
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/* identifiers */
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ot->idname = "RIGIDBODY_OT_objects_add";
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ot->name = "Add Rigid Bodies";
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ot->description = "Add selected objects as Rigid Bodies";
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/* callbacks */
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ot->exec = rigidbody_obs_add_exec;
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ot->poll = ED_operator_rigidbody_add_poll;
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/* flags */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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/* properties */
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ot->prop = RNA_def_enum(ot->srna, "type", rigidbody_ob_type_items, RBO_TYPE_ACTIVE, "Rigid Body Type", "");
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}
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/* ************ Remove Rigid Bodies ************** */
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static int rigidbody_obs_remove_exec(bContext *C, wmOperator *UNUSED(op))
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{
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Scene *scene = CTX_data_scene(C);
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RigidBodyWorld *rbw = BKE_rigidbody_get_world(scene);
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/* sanity checks */
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if (scene == NULL)
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return OPERATOR_CANCELLED;
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/* apply this to all selected objects... */
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CTX_DATA_BEGIN(C, Object *, ob, selected_objects)
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{
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if (ob->rigidbody_object) {
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ED_rigidbody_ob_remove(scene, ob);
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if (rbw)
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rem_from_group(rbw->group, ob, scene, NULL);
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}
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}
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CTX_DATA_END;
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/* send updates */
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DAG_ids_flush_update(CTX_data_main(C), 0);
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WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
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WM_event_add_notifier(C, NC_GROUP | NA_EDITED, NULL);
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/* done */
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return OPERATOR_FINISHED;
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}
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void RIGIDBODY_OT_objects_remove(wmOperatorType *ot)
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{
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/* identifiers */
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ot->idname = "RIGIDBODY_OT_objects_remove";
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ot->name = "Remove Rigid Bodies";
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ot->description = "Remove selected objects from Rigid Body simulation";
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/* callbacks */
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ot->exec = rigidbody_obs_remove_exec;
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ot->poll = ED_operator_rigidbody_active_poll;
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/* flags */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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}
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/* ********************************************** */
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/* Utility Operators */
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/* ************ Change Collision Shapes ************** */
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static int rigidbody_obs_shape_change_exec(bContext *C, wmOperator *op)
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{
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Scene *scene = CTX_data_scene(C);
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int shape = RNA_enum_get(op->ptr, "type");
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/* sanity checks */
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if (scene == NULL)
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return OPERATOR_CANCELLED;
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/* apply this to all selected objects... */
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CTX_DATA_BEGIN(C, Object *, ob, selected_objects)
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{
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if (ob->rigidbody_object) {
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PointerRNA ptr;
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/* use RNA-system to change the property and perform all necessary changes */
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RNA_pointer_create(&ob->id, &RNA_RigidBodyObject, ob->rigidbody_object, &ptr);
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RNA_enum_set(&ptr, "collision_shape", shape);
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}
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}
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CTX_DATA_END;
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/* send updates */
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WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL); // XXX: wrong notifiers for now, but these also do the job...
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/* done */
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return OPERATOR_FINISHED;
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}
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void RIGIDBODY_OT_shape_change(wmOperatorType *ot)
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{
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/* identifiers */
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ot->idname = "RIGIDBODY_OT_shape_change";
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ot->name = "Change Collision Shape";
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ot->description = "Change collision shapes for selected Rigid Body Objects";
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/* callbacks */
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ot->invoke = WM_menu_invoke;
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ot->exec = rigidbody_obs_shape_change_exec;
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ot->poll = ED_operator_rigidbody_active_poll;
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/* flags */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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/* properties */
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ot->prop = RNA_def_enum(ot->srna, "type", rigidbody_ob_shape_items, RB_SHAPE_TRIMESH, "Rigid Body Shape", "");
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}
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/* ************ Calculate Mass ************** */
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/* Entry in material density table */
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typedef struct rbMaterialDensityItem {
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const char *name; /* Name of material */
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float density; /* Density (kg/m^3) */
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} rbMaterialDensityItem;
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/* Preset density values for materials (kg/m^3)
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* Selected values obtained from:
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* 1) http://www.jaredzone.info/2010/09/densities.html
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* 2) http://www.avlandesign.com/density_construction.htm
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* 3) http://www.avlandesign.com/density_metal.htm
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*/
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static rbMaterialDensityItem RB_MATERIAL_DENSITY_TABLE[] = {
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{"Air", 1.0f}, /* not quite; adapted from 1.43 for oxygen for use as default */
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{"Acrylic", 1400.0f},
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{"Asphalt (Crushed)", 721.0f},
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{"Bark", 240.0f},
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{"Beans (Cocoa)", 593.0f},
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{"Beans (Soy)", 721.0f},
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{"Brick (Pressed)", 2400.0f},
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{"Brick (Common)", 2000.0f},
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{"Brick (Soft)", 1600.0f},
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{"Brass", 8216.0f},
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{"Bronze", 8860.0f},
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{"Carbon (Solid)", 2146.0f},
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{"Cardboard", 689.0f},
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{"Cast Iron", 7150.0f},
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//{"Cement", 1442.0f},
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{"Chalk (Solid)", 2499.0f},
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//{"Coffee (Fresh/Roast)", ~500},
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{"Concrete", 2320.0f},
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{"Charcoal", 208.0f},
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{"Cork", 240.0f},
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{"Copper", 8933.0f},
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{"Garbage", 481.0f},
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{"Glass (Broken)", 1940.0f},
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{"Glass (Solid)", 2190.0f},
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{"Gold", 19282.0f},
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{"Granite (Broken)", 1650.0f},
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{"Granite (Solid)", 2691.0f},
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{"Gravel", 2780.0f},
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{"Ice (Crushed)", 593.0f},
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{"Ice (Solid)", 919.0f},
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{"Iron", 7874.0f},
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{"Lead", 11342.0f},
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{"Limestone (Broken)", 1554.0f},
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{"Limestone (Solid)", 2611.0f},
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{"Marble (Broken)", 1570.0f},
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{"Marble (Solid)", 2563.0f},
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{"Paper", 1201.0f},
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{"Peanuts (Shelled)", 641.0f},
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{"Peanuts (Not Shelled)", 272.0f},
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{"Plaster", 849.0f},
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{"Plastic", 1200.0f},
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{"Polystyrene", 1050.0f},
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{"Rubber", 1522.0f},
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{"Silver", 10501.0f},
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{"Steel", 7860.0f},
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{"Stone", 2515.0f},
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{"Stone (Crushed)", 1602.0f},
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{"Timber", 610.0f}
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};
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static const int NUM_RB_MATERIAL_PRESETS = sizeof(RB_MATERIAL_DENSITY_TABLE) / sizeof(rbMaterialDensityItem);
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||||
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||||
/* dynamically generate list of items
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* - Although there is a runtime cost, this has a lower maintenance cost
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||||
* in the long run than other two-list solutions...
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*/
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static EnumPropertyItem *rigidbody_materials_itemf(bContext *UNUSED(C), PointerRNA *UNUSED(ptr), PropertyRNA *UNUSED(prop), int *free)
|
||||
{
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||||
EnumPropertyItem item_tmp = {0};
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||||
EnumPropertyItem *item = NULL;
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||||
int totitem = 0;
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||||
int i = 0;
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||||
|
||||
/* add each preset to the list */
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for (i = 0; i < NUM_RB_MATERIAL_PRESETS; i++) {
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||||
rbMaterialDensityItem *preset = &RB_MATERIAL_DENSITY_TABLE[i];
|
||||
|
||||
item_tmp.identifier = item_tmp.name = preset->name;
|
||||
item_tmp.value = i;
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RNA_enum_item_add(&item, &totitem, &item_tmp);
|
||||
}
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||||
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||||
/* add special "custom" entry to the end of the list */
|
||||
{
|
||||
item_tmp.identifier = item_tmp.name = "Custom";
|
||||
item_tmp.value = -1;
|
||||
RNA_enum_item_add(&item, &totitem, &item_tmp);
|
||||
}
|
||||
|
||||
RNA_enum_item_end(&item, &totitem);
|
||||
*free = 1;
|
||||
|
||||
return item;
|
||||
}
|
||||
|
||||
/* ------------------------------------------ */
|
||||
|
||||
/* helper function to calculate volume of rigidbody object */
|
||||
// TODO: allow a parameter to specify method used to calculate this?
|
||||
static float calc_rigidbody_ob_volume(Object *ob)
|
||||
{
|
||||
RigidBodyOb *rbo = ob->rigidbody_object;
|
||||
|
||||
float size[3] = {1.0f, 1.0f, 1.0f};
|
||||
float radius = 1.0f;
|
||||
float height = 1.0f;
|
||||
|
||||
float volume = 0.0f;
|
||||
|
||||
/* if automatically determining dimensions, use the Object's boundbox
|
||||
* - assume that all quadrics are standing upright on local z-axis
|
||||
* - assume even distribution of mass around the Object's pivot
|
||||
* (i.e. Object pivot is centralised in boundbox)
|
||||
* - boundbox gives full width
|
||||
*/
|
||||
// XXX: all dimensions are auto-determined now... later can add stored settings for this
|
||||
BKE_object_dimensions_get(ob, size);
|
||||
|
||||
if (ELEM3(rbo->shape, RB_SHAPE_CAPSULE, RB_SHAPE_CYLINDER, RB_SHAPE_CONE)) {
|
||||
/* take radius as largest x/y dimension, and height as z-dimension */
|
||||
radius = MAX2(size[0], size[1]) * 0.5f;
|
||||
height = size[2];
|
||||
}
|
||||
else if (rbo->shape == RB_SHAPE_SPHERE) {
|
||||
/* take radius to the the largest dimension to try and encompass everything */
|
||||
radius = max_fff(size[0], size[1], size[2]) * 0.5f;
|
||||
}
|
||||
|
||||
/* calculate volume as appropriate */
|
||||
switch (rbo->shape) {
|
||||
case RB_SHAPE_BOX:
|
||||
volume = size[0] * size[1] * size[2];
|
||||
break;
|
||||
|
||||
case RB_SHAPE_SPHERE:
|
||||
volume = 4.0f / 3.0f * (float)M_PI * radius * radius * radius;
|
||||
break;
|
||||
|
||||
/* for now, assume that capsule is close enough to a cylinder... */
|
||||
case RB_SHAPE_CAPSULE:
|
||||
case RB_SHAPE_CYLINDER:
|
||||
volume = (float)M_PI * radius * radius * height;
|
||||
break;
|
||||
|
||||
case RB_SHAPE_CONE:
|
||||
volume = (float)M_PI / 3.0f * radius * radius * height;
|
||||
break;
|
||||
|
||||
/* for now, all mesh shapes are just treated as boxes...
|
||||
* NOTE: this may overestimate the volume, but other methods are overkill
|
||||
*/
|
||||
case RB_SHAPE_CONVEXH:
|
||||
case RB_SHAPE_TRIMESH:
|
||||
volume = size[0] * size[1] * size[2];
|
||||
break;
|
||||
|
||||
#if 0 // XXX: not defined yet
|
||||
case RB_SHAPE_COMPOUND:
|
||||
volume = 0.0f;
|
||||
break;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* return the volume calculated */
|
||||
return volume;
|
||||
}
|
||||
|
||||
/* ------------------------------------------ */
|
||||
|
||||
static int rigidbody_obs_calc_mass_exec(bContext *C, wmOperator *op)
|
||||
{
|
||||
Scene *scene = CTX_data_scene(C);
|
||||
int material = RNA_enum_get(op->ptr, "material");
|
||||
float density;
|
||||
|
||||
/* sanity checks */
|
||||
if (scene == NULL)
|
||||
return OPERATOR_CANCELLED;
|
||||
|
||||
/* get density (kg/m^3) to apply */
|
||||
if (material >= 0) {
|
||||
/* get density from table, and store in props for later repeating */
|
||||
if (material >= NUM_RB_MATERIAL_PRESETS)
|
||||
material = 0;
|
||||
|
||||
density = RB_MATERIAL_DENSITY_TABLE[material].density;
|
||||
RNA_float_set(op->ptr, "density", density);
|
||||
}
|
||||
else {
|
||||
/* custom - grab from whatever value is set */
|
||||
density = RNA_float_get(op->ptr, "density");
|
||||
}
|
||||
|
||||
/* apply this to all selected objects (with rigidbodies)... */
|
||||
CTX_DATA_BEGIN(C, Object *, ob, selected_objects)
|
||||
{
|
||||
if (ob->rigidbody_object) {
|
||||
PointerRNA ptr;
|
||||
|
||||
float volume; /* m^3 */
|
||||
float mass; /* kg */
|
||||
|
||||
/* mass is calculated from the approximate volume of the object,
|
||||
* and the density of the material we're simulating
|
||||
*/
|
||||
volume = calc_rigidbody_ob_volume(ob);
|
||||
mass = volume * density;
|
||||
|
||||
/* use RNA-system to change the property and perform all necessary changes */
|
||||
RNA_pointer_create(&ob->id, &RNA_RigidBodyObject, ob->rigidbody_object, &ptr);
|
||||
RNA_float_set(&ptr, "mass", mass);
|
||||
}
|
||||
}
|
||||
CTX_DATA_END;
|
||||
|
||||
/* send updates */
|
||||
WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL); // XXX: wrong notifiers for now, but these also do the job...
|
||||
|
||||
/* done */
|
||||
return OPERATOR_FINISHED;
|
||||
}
|
||||
|
||||
void RIGIDBODY_OT_mass_calculate(wmOperatorType *ot)
|
||||
{
|
||||
PropertyRNA *prop;
|
||||
|
||||
/* identifiers */
|
||||
ot->idname = "RIGIDBODY_OT_mass_calculate";
|
||||
ot->name = "Calculate Mass";
|
||||
ot->description = "Automatically calculate mass values for Rigid Body Objects based on volume";
|
||||
|
||||
/* callbacks */
|
||||
ot->invoke = WM_menu_invoke; // XXX
|
||||
ot->exec = rigidbody_obs_calc_mass_exec;
|
||||
ot->poll = ED_operator_rigidbody_active_poll;
|
||||
|
||||
/* flags */
|
||||
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
|
||||
|
||||
/* properties */
|
||||
ot->prop = prop = RNA_def_enum(ot->srna, "material",
|
||||
DummyRNA_DEFAULT_items, 0,
|
||||
"Material Preset",
|
||||
"Type of material that objects are made of. "
|
||||
"Determines material density");
|
||||
RNA_def_enum_funcs(prop, rigidbody_materials_itemf);
|
||||
|
||||
RNA_def_float(ot->srna, "density", 1.0, FLT_MIN, FLT_MAX,
|
||||
"Density",
|
||||
"Custom density value (kg/m^3) to use instead of material preset",
|
||||
1.0f, 2500.0f);
|
||||
}
|
||||
|
||||
/* ********************************************** */
|
||||
Reference in New Issue
Block a user