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blender-archive/source/blender/editors/physics/rigidbody_object.c

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2013 Blender Foundation
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Joshua Leung, Sergej Reich
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file rigidbody_object.c
* \ingroup editor_physics
* \brief Rigid Body object editing operators
*/
#include <stdlib.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "DNA_group_types.h"
#include "DNA_object_types.h"
#include "DNA_mesh_types.h"
#include "DNA_rigidbody_types.h"
#include "DNA_scene_types.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLF_translation.h"
#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_global.h"
#include "BKE_group.h"
#include "BKE_object.h"
#include "BKE_report.h"
#include "BKE_rigidbody.h"
#include "RNA_access.h"
#include "RNA_define.h"
#include "RNA_enum_types.h"
#include "WM_api.h"
#include "WM_types.h"
#include "ED_object.h"
#include "ED_physics.h"
#include "ED_screen.h"
#include "physics_intern.h"
/* ********************************************** */
/* Helper API's for RigidBody Objects Editing */
static int ED_operator_rigidbody_active_poll(bContext *C)
{
if (ED_operator_object_active_editable(C)) {
Object *ob = ED_object_active_context(C);
return (ob && ob->rigidbody_object);
}
else
return 0;
}
/* ----------------- */
bool ED_rigidbody_object_add(Scene *scene, Object *ob, int type, ReportList *reports)
{
RigidBodyWorld *rbw = BKE_rigidbody_get_world(scene);
if (ob->type != OB_MESH) {
BKE_report(reports, RPT_ERROR, "Can't add Rigid Body to non mesh object");
return false;
}
if (((Mesh *)ob->data)->totpoly == 0) {
BKE_report(reports, RPT_ERROR, "Can't create Rigid Body from mesh with no polygons");
return false;
}
/* Add rigid body world and group if they don't exist for convenience */
if (rbw == NULL) {
rbw = BKE_rigidbody_create_world(scene);
if (rbw == NULL) {
BKE_report(reports, RPT_ERROR, "Can't create Rigid Body world");
return false;
}
BKE_rigidbody_validate_sim_world(scene, rbw, false);
scene->rigidbody_world = rbw;
}
if (rbw->group == NULL) {
rbw->group = BKE_group_add(G.main, "RigidBodyWorld");
}
/* make rigidbody object settings */
if (ob->rigidbody_object == NULL) {
ob->rigidbody_object = BKE_rigidbody_create_object(scene, ob, type);
}
ob->rigidbody_object->type = type;
ob->rigidbody_object->flag |= RBO_FLAG_NEEDS_VALIDATE;
/* add object to rigid body group */
BKE_group_object_add(rbw->group, ob, scene, NULL);
DAG_id_tag_update(&ob->id, OB_RECALC_OB);
return true;
}
void ED_rigidbody_object_remove(Scene *scene, Object *ob)
{
RigidBodyWorld *rbw = BKE_rigidbody_get_world(scene);
BKE_rigidbody_remove_object(scene, ob);
if (rbw)
BKE_group_object_unlink(rbw->group, ob, scene, NULL);
DAG_id_tag_update(&ob->id, OB_RECALC_OB);
}
/* ********************************************** */
/* Active Object Add/Remove Operators */
/* ************ Add Rigid Body ************** */
static int rigidbody_object_add_exec(bContext *C, wmOperator *op)
{
Scene *scene = CTX_data_scene(C);
Object *ob = ED_object_active_context(C);
int type = RNA_enum_get(op->ptr, "type");
bool changed;
/* apply to active object */
changed = ED_rigidbody_object_add(scene, ob, type, op->reports);
if (changed) {
/* send updates */
WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
WM_event_add_notifier(C, NC_OBJECT | ND_POINTCACHE, NULL);
/* done */
return OPERATOR_FINISHED;
}
else {
return OPERATOR_CANCELLED;
}
}
void RIGIDBODY_OT_object_add(wmOperatorType *ot)
{
/* identifiers */
ot->idname = "RIGIDBODY_OT_object_add";
ot->name = "Add Rigid Body";
ot->description = "Add active object as Rigid Body";
/* callbacks */
ot->exec = rigidbody_object_add_exec;
ot->poll = ED_operator_object_active_editable_mesh;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
/* properties */
ot->prop = RNA_def_enum(ot->srna, "type", rigidbody_object_type_items, RBO_TYPE_ACTIVE, "Rigid Body Type", "");
}
/* ************ Remove Rigid Body ************** */
static int rigidbody_object_remove_exec(bContext *C, wmOperator *op)
{
Scene *scene = CTX_data_scene(C);
Object *ob = ED_object_active_context(C);
bool changed = false;
/* apply to active object */
if (!ELEM(NULL, ob, ob->rigidbody_object)) {
ED_rigidbody_object_remove(scene, ob);
changed = true;
}
if (changed) {
/* send updates */
WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
WM_event_add_notifier(C, NC_OBJECT | ND_POINTCACHE, NULL);
/* done */
return OPERATOR_FINISHED;
}
else {
BKE_report(op->reports, RPT_ERROR, "Object has no Rigid Body settings to remove");
return OPERATOR_CANCELLED;
}
}
void RIGIDBODY_OT_object_remove(wmOperatorType *ot)
{
/* identifiers */
ot->idname = "RIGIDBODY_OT_object_remove";
ot->name = "Remove Rigid Body";
ot->description = "Remove Rigid Body settings from Object";
/* callbacks */
ot->exec = rigidbody_object_remove_exec;
ot->poll = ED_operator_rigidbody_active_poll;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
}
/* ********************************************** */
/* Selected Object Add/Remove Operators */
/* ************ Add Rigid Bodies ************** */
static int rigidbody_objects_add_exec(bContext *C, wmOperator *op)
{
Scene *scene = CTX_data_scene(C);
int type = RNA_enum_get(op->ptr, "type");
bool changed = false;
/* create rigid body objects and add them to the world's group */
CTX_DATA_BEGIN(C, Object *, ob, selected_objects) {
changed |= ED_rigidbody_object_add(scene, ob, type, op->reports);
}
CTX_DATA_END;
if (changed) {
/* send updates */
WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
WM_event_add_notifier(C, NC_OBJECT | ND_POINTCACHE, NULL);
/* done */
return OPERATOR_FINISHED;
}
else {
return OPERATOR_CANCELLED;
}
}
void RIGIDBODY_OT_objects_add(wmOperatorType *ot)
{
/* identifiers */
ot->idname = "RIGIDBODY_OT_objects_add";
ot->name = "Add Rigid Bodies";
ot->description = "Add selected objects as Rigid Bodies";
/* callbacks */
ot->exec = rigidbody_objects_add_exec;
ot->poll = ED_operator_object_active_editable_mesh;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
/* properties */
ot->prop = RNA_def_enum(ot->srna, "type", rigidbody_object_type_items, RBO_TYPE_ACTIVE, "Rigid Body Type", "");
}
/* ************ Remove Rigid Bodies ************** */
static int rigidbody_objects_remove_exec(bContext *C, wmOperator *UNUSED(op))
{
Scene *scene = CTX_data_scene(C);
bool changed = false;
/* apply this to all selected objects... */
CTX_DATA_BEGIN(C, Object *, ob, selected_objects)
{
if (ob->rigidbody_object) {
ED_rigidbody_object_remove(scene, ob);
changed = true;
}
}
CTX_DATA_END;
if (changed) {
/* send updates */
WM_event_add_notifier(C, NC_OBJECT | ND_TRANSFORM, NULL);
WM_event_add_notifier(C, NC_OBJECT | ND_POINTCACHE, NULL);
/* done */
return OPERATOR_FINISHED;
}
else {
return OPERATOR_CANCELLED;
}
}
void RIGIDBODY_OT_objects_remove(wmOperatorType *ot)
{
/* identifiers */
ot->idname = "RIGIDBODY_OT_objects_remove";
ot->name = "Remove Rigid Bodies";
ot->description = "Remove selected objects from Rigid Body simulation";
/* callbacks */
ot->exec = rigidbody_objects_remove_exec;
ot->poll = ED_operator_scene_editable;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
}
/* ********************************************** */
/* Utility Operators */
/* ************ Change Collision Shapes ************** */
static int rigidbody_objects_shape_change_exec(bContext *C, wmOperator *op)
{
int shape = RNA_enum_get(op->ptr, "type");
bool changed = false;
/* apply this to all selected objects... */
CTX_DATA_BEGIN(C, Object *, ob, selected_objects)
{
if (ob->rigidbody_object) {
PointerRNA ptr;
/* use RNA-system to change the property and perform all necessary changes */
RNA_pointer_create(&ob->id, &RNA_RigidBodyObject, ob->rigidbody_object, &ptr);
RNA_enum_set(&ptr, "collision_shape", shape);
DAG_id_tag_update(&ob->id, OB_RECALC_OB);
changed = true;
}
}
CTX_DATA_END;
if (changed) {
/* send updates */
WM_event_add_notifier(C, NC_OBJECT | ND_POINTCACHE, NULL);
/* done */
return OPERATOR_FINISHED;
}
else {
return OPERATOR_CANCELLED;
}
}
void RIGIDBODY_OT_shape_change(wmOperatorType *ot)
{
/* identifiers */
ot->idname = "RIGIDBODY_OT_shape_change";
ot->name = "Change Collision Shape";
ot->description = "Change collision shapes for selected Rigid Body Objects";
/* callbacks */
ot->invoke = WM_menu_invoke;
ot->exec = rigidbody_objects_shape_change_exec;
ot->poll = ED_operator_scene_editable;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
/* properties */
ot->prop = RNA_def_enum(ot->srna, "type", rigidbody_object_shape_items, RB_SHAPE_TRIMESH, "Rigid Body Shape", "");
}
/* ************ Calculate Mass ************** */
/* Entry in material density table */
typedef struct rbMaterialDensityItem {
const char *name; /* Name of material */
float density; /* Density (kg/m^3) */
} rbMaterialDensityItem;
/* Preset density values for materials (kg/m^3)
* Selected values obtained from:
* 1) http://www.jaredzone.info/2010/09/densities.html
* 2) http://www.avlandesign.com/density_construction.htm
* 3) http://www.avlandesign.com/density_metal.htm
*/
static rbMaterialDensityItem RB_MATERIAL_DENSITY_TABLE[] = {
{N_("Air"), 1.0f}, /* not quite; adapted from 1.43 for oxygen for use as default */
{N_("Acrylic"), 1400.0f},
{N_("Asphalt (Crushed)"), 721.0f},
{N_("Bark"), 240.0f},
{N_("Beans (Cocoa)"), 593.0f},
{N_("Beans (Soy)"), 721.0f},
{N_("Brick (Pressed)"), 2400.0f},
{N_("Brick (Common)"), 2000.0f},
{N_("Brick (Soft)"), 1600.0f},
{N_("Brass"), 8216.0f},
{N_("Bronze"), 8860.0f},
{N_("Carbon (Solid)"), 2146.0f},
{N_("Cardboard"), 689.0f},
{N_("Cast Iron"), 7150.0f},
/* {N_("Cement"), 1442.0f}, */
{N_("Chalk (Solid)"), 2499.0f},
/* {N_("Coffee (Fresh/Roast)"), ~500}, */
{N_("Concrete"), 2320.0f},
{N_("Charcoal"), 208.0f},
{N_("Cork"), 240.0f},
{N_("Copper"), 8933.0f},
{N_("Garbage"), 481.0f},
{N_("Glass (Broken)"), 1940.0f},
{N_("Glass (Solid)"), 2190.0f},
{N_("Gold"), 19282.0f},
{N_("Granite (Broken)"), 1650.0f},
{N_("Granite (Solid)"), 2691.0f},
{N_("Gravel"), 2780.0f},
{N_("Ice (Crushed)"), 593.0f},
{N_("Ice (Solid)"), 919.0f},
{N_("Iron"), 7874.0f},
{N_("Lead"), 11342.0f},
{N_("Limestone (Broken)"), 1554.0f},
{N_("Limestone (Solid)"), 2611.0f},
{N_("Marble (Broken)"), 1570.0f},
{N_("Marble (Solid)"), 2563.0f},
{N_("Paper"), 1201.0f},
{N_("Peanuts (Shelled)"), 641.0f},
{N_("Peanuts (Not Shelled)"), 272.0f},
{N_("Plaster"), 849.0f},
{N_("Plastic"), 1200.0f},
{N_("Polystyrene"), 1050.0f},
{N_("Rubber"), 1522.0f},
{N_("Silver"), 10501.0f},
{N_("Steel"), 7860.0f},
{N_("Stone"), 2515.0f},
{N_("Stone (Crushed)"), 1602.0f},
{N_("Timber"), 610.0f}
};
static const int NUM_RB_MATERIAL_PRESETS = sizeof(RB_MATERIAL_DENSITY_TABLE) / sizeof(rbMaterialDensityItem);
/* dynamically generate list of items
* - Although there is a runtime cost, this has a lower maintenance cost
* in the long run than other two-list solutions...
*/
static EnumPropertyItem *rigidbody_materials_itemf(bContext *UNUSED(C), PointerRNA *UNUSED(ptr), PropertyRNA *UNUSED(prop), bool *r_free)
{
EnumPropertyItem item_tmp = {0};
EnumPropertyItem *item = NULL;
int totitem = 0;
int i = 0;
/* add each preset to the list */
for (i = 0; i < NUM_RB_MATERIAL_PRESETS; i++) {
rbMaterialDensityItem *preset = &RB_MATERIAL_DENSITY_TABLE[i];
item_tmp.identifier = preset->name;
item_tmp.name = IFACE_(preset->name);
item_tmp.value = i;
RNA_enum_item_add(&item, &totitem, &item_tmp);
}
/* add special "custom" entry to the end of the list */
{
item_tmp.identifier = "Custom";
item_tmp.name = IFACE_("Custom");
item_tmp.value = -1;
RNA_enum_item_add(&item, &totitem, &item_tmp);
}
RNA_enum_item_end(&item, &totitem);
*r_free = true;
return item;
}
/* ------------------------------------------ */
/* helper function to calculate volume of rigidbody object */
// TODO: allow a parameter to specify method used to calculate this?
static float rigidbody_object_calc_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_objects_calc_mass_exec(bContext *C, wmOperator *op)
{
int material = RNA_enum_get(op->ptr, "material");
float density;
bool changed = false;
/* 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 = rigidbody_object_calc_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);
DAG_id_tag_update(&ob->id, OB_RECALC_OB);
changed = true;
}
}
CTX_DATA_END;
if (changed) {
/* send updates */
WM_event_add_notifier(C, NC_OBJECT | ND_POINTCACHE, NULL);
/* done */
return OPERATOR_FINISHED;
}
else {
return OPERATOR_CANCELLED;
}
}
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_objects_calc_mass_exec;
ot->poll = ED_operator_scene_editable;
/* 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);
}
/* ********************************************** */