forked from bartvdbraak/blender
9ed079bf5c
Certain actuators hold a pointer to an objects: Property, SceneCamera, AddObject, Camera, Parent, TractTo. When a group is duplicated, the actuators that point to objects within the group will be relinked to point to the replicated objects and not to the original objects. This helps to setup self-contained group with a camera following a character for example. This feature also works when adding a single object (and all its children) with the AddObject actuator. The second part of the patch extends the protection against object deletion to all the actuators of the above list (previously, only the TrackTo, AddObject and Property actuators were protected). In case the target object of these actuators is deleted, the BGE won't crash.
571 lines
15 KiB
C++
571 lines
15 KiB
C++
/**
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* KX_CameraActuator.cpp
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*
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* $Id$
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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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): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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#include "KX_CameraActuator.h"
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#include <iostream>
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#include <math.h>
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#include "KX_GameObject.h"
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STR_String KX_CameraActuator::X_AXIS_STRING = "x";
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STR_String KX_CameraActuator::Y_AXIS_STRING = "y";
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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/* ------------------------------------------------------------------------- */
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/* Native functions */
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/* ------------------------------------------------------------------------- */
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KX_CameraActuator::KX_CameraActuator(
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SCA_IObject* gameobj,
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SCA_IObject *obj,
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MT_Scalar hght,
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MT_Scalar minhght,
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MT_Scalar maxhght,
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bool xytog,
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PyTypeObject* T
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):
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SCA_IActuator(gameobj, T),
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m_ob (obj),
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m_height (hght),
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m_minHeight (minhght),
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m_maxHeight (maxhght),
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m_x (xytog)
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{
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if (m_ob)
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m_ob->RegisterActuator(this);
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}
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KX_CameraActuator::~KX_CameraActuator()
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{
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if (m_ob)
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m_ob->UnregisterActuator(this);
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}
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CValue*
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KX_CameraActuator::
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GetReplica(
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) {
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KX_CameraActuator* replica = new KX_CameraActuator(*this);
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replica->ProcessReplica();
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// this will copy properties and so on...
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CValue::AddDataToReplica(replica);
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return replica;
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};
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void KX_CameraActuator::ProcessReplica()
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{
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if (m_ob)
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m_ob->RegisterActuator(this);
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SCA_IActuator::ProcessReplica();
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}
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bool KX_CameraActuator::UnlinkObject(SCA_IObject* clientobj)
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{
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if (clientobj == m_ob)
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{
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// this object is being deleted, we cannot continue to track it.
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m_ob = NULL;
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return true;
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}
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return false;
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}
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void KX_CameraActuator::Relink(GEN_Map<GEN_HashedPtr, void*> *obj_map)
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{
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void **h_obj = (*obj_map)[m_ob];
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if (h_obj) {
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if (m_ob)
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m_ob->UnregisterActuator(this);
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m_ob = (SCA_IObject*)(*h_obj);
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m_ob->RegisterActuator(this);
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}
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}
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/* three functions copied from blender arith... don't know if there's an equivalent */
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static float Kx_Normalize(float *n)
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{
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float d;
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d= n[0]*n[0]+n[1]*n[1]+n[2]*n[2];
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/* FLT_EPSILON is too large! A larger value causes normalize errors in a scaled down utah teapot */
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if(d>0.0000000000001) {
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d= sqrt(d);
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n[0]/=d;
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n[1]/=d;
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n[2]/=d;
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} else {
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n[0]=n[1]=n[2]= 0.0;
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d= 0.0;
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}
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return d;
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}
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static void Kx_Crossf(float *c, float *a, float *b)
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{
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c[0] = a[1] * b[2] - a[2] * b[1];
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c[1] = a[2] * b[0] - a[0] * b[2];
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c[2] = a[0] * b[1] - a[1] * b[0];
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}
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static void Kx_VecUpMat3(float *vec, float mat[][3], short axis)
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{
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// Construct a camera matrix s.t. the specified axis
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// maps to the given vector (*vec). Also defines the rotation
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// about this axis by mapping one of the other axis to the y-axis.
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float inp;
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short cox = 0, coy = 0, coz = 0;
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/* up varieeren heeft geen zin, is eigenlijk helemaal geen up!
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* zie VecUpMat3old
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*/
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if(axis==0) {
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cox= 0; coy= 1; coz= 2; /* Y up Z tr */
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}
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if(axis==1) {
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cox= 1; coy= 2; coz= 0; /* Z up X tr */
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}
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if(axis==2) {
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cox= 2; coy= 0; coz= 1; /* X up Y tr */
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}
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if(axis==3) {
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cox= 0; coy= 1; coz= 2; /* Y op -Z tr */
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vec[0]= -vec[0];
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vec[1]= -vec[1];
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vec[2]= -vec[2];
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}
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if(axis==4) {
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cox= 1; coy= 0; coz= 2; /* */
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}
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if(axis==5) {
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cox= 2; coy= 1; coz= 0; /* Y up X tr */
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}
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mat[coz][0]= vec[0];
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mat[coz][1]= vec[1];
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mat[coz][2]= vec[2];
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if (Kx_Normalize((float *)mat[coz]) == 0.f) {
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/* this is a very abnormal situation: the camera has reach the object center exactly
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We will choose a completely arbitrary direction */
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mat[coz][0] = 1.0f;
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mat[coz][1] = 0.0f;
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mat[coz][2] = 0.0f;
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}
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inp= mat[coz][2];
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mat[coy][0]= - inp*mat[coz][0];
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mat[coy][1]= - inp*mat[coz][1];
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mat[coy][2]= 1.0 - inp*mat[coz][2];
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if (Kx_Normalize((float *)mat[coy]) == 0.f) {
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/* the camera is vertical, chose the y axis arbitrary */
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mat[coy][0] = 0.f;
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mat[coy][1] = 1.f;
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mat[coy][2] = 0.f;
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}
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Kx_Crossf(mat[cox], mat[coy], mat[coz]);
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}
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bool KX_CameraActuator::Update(double curtime, bool frame)
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{
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/* wondering... is it really neccesary/desirable to suppress negative */
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/* events here? */
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bool bNegativeEvent = IsNegativeEvent();
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RemoveAllEvents();
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if (bNegativeEvent || !m_ob)
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return false;
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KX_GameObject *obj = (KX_GameObject*) GetParent();
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MT_Point3 from = obj->NodeGetWorldPosition();
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MT_Matrix3x3 frommat = obj->NodeGetWorldOrientation();
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/* These casts are _very_ dangerous!!! */
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MT_Point3 lookat = ((KX_GameObject*)m_ob)->NodeGetWorldPosition();
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MT_Matrix3x3 actormat = ((KX_GameObject*)m_ob)->NodeGetWorldOrientation();
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float fp1[3], fp2[3], rc[3];
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float inp, fac; //, factor = 0.0; /* some factor... */
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float mindistsq, maxdistsq, distsq;
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float mat[3][3];
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/* The rules: */
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/* CONSTRAINT 1: not implemented */
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/* CONSTRAINT 2: can camera see actor? */
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/* CONSTRAINT 3: fixed height relative to floor below actor. */
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/* CONSTRAINT 4: camera rotates behind actor */
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/* CONSTRAINT 5: minimum / maximum distance */
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/* CONSTRAINT 6: again: fixed height relative to floor below actor */
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/* CONSTRAINT 7: track to floor below actor */
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/* CONSTRAINT 8: look a little bit left or right, depending on how the
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character is looking (horizontal x)
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*/
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/* ...and then set the camera position. Since we assume the parent of */
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/* this actuator is always a camera, just set the parent position and */
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/* rotation. We do not check whether we really have a camera as parent. */
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/* It may be better to turn this into a general tracking actuator later */
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/* on, since lots of plausible relations can be filled in here. */
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/* ... set up some parameters ... */
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/* missing here: the 'floorloc' of the actor's shadow */
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mindistsq= m_minHeight*m_minHeight;
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maxdistsq= m_maxHeight*m_maxHeight;
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/* C1: not checked... is a future option */
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/* C2: blender test_visibility function. Can this be a ray-test? */
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/* C3: fixed height */
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from[2] = (15.0*from[2] + lookat[2] + m_height)/16.0;
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/* C4: camera behind actor */
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if (m_x) {
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fp1[0] = actormat[0][0];
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fp1[1] = actormat[1][0];
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fp1[2] = actormat[2][0];
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fp2[0] = frommat[0][0];
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fp2[1] = frommat[1][0];
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fp2[2] = frommat[2][0];
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}
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else {
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fp1[0] = actormat[0][1];
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fp1[1] = actormat[1][1];
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fp1[2] = actormat[2][1];
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fp2[0] = frommat[0][1];
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fp2[1] = frommat[1][1];
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fp2[2] = frommat[2][1];
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}
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inp= fp1[0]*fp2[0] + fp1[1]*fp2[1] + fp1[2]*fp2[2];
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fac= (-1.0 + inp)/32.0;
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from[0]+= fac*fp1[0];
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from[1]+= fac*fp1[1];
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from[2]+= fac*fp1[2];
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/* alleen alstie ervoor ligt: cross testen en loodrechte bijtellen */
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if(inp<0.0) {
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if(fp1[0]*fp2[1] - fp1[1]*fp2[0] > 0.0) {
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from[0]-= fac*fp1[1];
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from[1]+= fac*fp1[0];
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}
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else {
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from[0]+= fac*fp1[1];
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from[1]-= fac*fp1[0];
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}
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}
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/* CONSTRAINT 5: minimum / maximum afstand */
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rc[0]= (lookat[0]-from[0]);
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rc[1]= (lookat[1]-from[1]);
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rc[2]= (lookat[2]-from[2]);
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distsq= rc[0]*rc[0] + rc[1]*rc[1] + rc[2]*rc[2];
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if(distsq > maxdistsq) {
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distsq = 0.15*(distsq-maxdistsq)/distsq;
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from[0] += distsq*rc[0];
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from[1] += distsq*rc[1];
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from[2] += distsq*rc[2];
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}
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else if(distsq < mindistsq) {
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distsq = 0.15*(mindistsq-distsq)/mindistsq;
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from[0] -= distsq*rc[0];
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from[1] -= distsq*rc[1];
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from[2] -= distsq*rc[2];
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}
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/* CONSTRAINT 7: track to schaduw */
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rc[0]= (lookat[0]-from[0]);
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rc[1]= (lookat[1]-from[1]);
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rc[2]= (lookat[2]-from[2]);
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Kx_VecUpMat3(rc, mat, 3); /* y up Track -z */
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/* now set the camera position and rotation */
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obj->NodeSetLocalPosition(from);
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actormat[0][0]= mat[0][0]; actormat[0][1]= mat[1][0]; actormat[0][2]= mat[2][0];
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actormat[1][0]= mat[0][1]; actormat[1][1]= mat[1][1]; actormat[1][2]= mat[2][1];
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actormat[2][0]= mat[0][2]; actormat[2][1]= mat[1][2]; actormat[2][2]= mat[2][2];
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obj->NodeSetLocalOrientation(actormat);
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return true;
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}
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CValue *KX_CameraActuator::findObject(char *obName)
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{
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/* hook to object system */
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return NULL;
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}
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bool KX_CameraActuator::string2axischoice(const char *axisString)
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{
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bool res = true;
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res = !(axisString == Y_AXIS_STRING);
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return res;
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}
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/* ------------------------------------------------------------------------- */
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/* Python functions */
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/* ------------------------------------------------------------------------- */
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/* Integration hooks ------------------------------------------------------- */
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PyTypeObject KX_CameraActuator::Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0,
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"KX_CameraActuator",
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sizeof(KX_CameraActuator),
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0,
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PyDestructor,
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0,
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__getattr,
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__setattr,
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0, //&MyPyCompare,
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__repr,
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0, //&cvalue_as_number,
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0,
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0,
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0,
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0
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};
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PyParentObject KX_CameraActuator::Parents[] = {
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&KX_CameraActuator::Type,
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&SCA_IActuator::Type,
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&SCA_ILogicBrick::Type,
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&CValue::Type,
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NULL
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};
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PyMethodDef KX_CameraActuator::Methods[] = {
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{"setObject",(PyCFunction) KX_CameraActuator::sPySetObject, METH_VARARGS, SetObject_doc},
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{"getObject",(PyCFunction) KX_CameraActuator::sPyGetObject, METH_NOARGS, GetObject_doc},
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{"setMin" ,(PyCFunction) KX_CameraActuator::sPySetMin, METH_VARARGS, SetMin_doc},
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{"getMin" ,(PyCFunction) KX_CameraActuator::sPyGetMin, METH_NOARGS, GetMin_doc},
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{"setMax" ,(PyCFunction) KX_CameraActuator::sPySetMax, METH_VARARGS, SetMax_doc},
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{"getMax" ,(PyCFunction) KX_CameraActuator::sPyGetMax, METH_NOARGS, GetMax_doc},
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{"setHeight",(PyCFunction) KX_CameraActuator::sPySetHeight, METH_VARARGS, SetHeight_doc},
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{"getHeight",(PyCFunction) KX_CameraActuator::sPyGetHeight, METH_NOARGS, GetHeight_doc},
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{"setXY" ,(PyCFunction) KX_CameraActuator::sPySetXY, METH_VARARGS, SetXY_doc},
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{"getXY" ,(PyCFunction) KX_CameraActuator::sPyGetXY, METH_VARARGS, GetXY_doc},
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{NULL,NULL,NULL,NULL} //Sentinel
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};
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PyObject* KX_CameraActuator::_getattr(const STR_String& attr) {
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_getattr_up(SCA_IActuator);
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}
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/* get obj ---------------------------------------------------------- */
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char KX_CameraActuator::GetObject_doc[] =
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"getObject\n"
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"\tReturns the object this sensor reacts to.\n";
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PyObject* KX_CameraActuator::PyGetObject(PyObject* self,
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PyObject* args,
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PyObject* kwds)
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{
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return PyString_FromString(m_ob->GetName());
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}
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/* set obj ---------------------------------------------------------- */
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char KX_CameraActuator::SetObject_doc[] =
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"setObject\n"
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"\tSets the object this sensor reacts to.\n";
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PyObject* KX_CameraActuator::PySetObject(PyObject* self,
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PyObject* args,
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PyObject* kwds)
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{
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PyObject* gameobj;
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if (PyArg_ParseTuple(args, "O!", &KX_GameObject::Type, &gameobj))
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{
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if (m_ob)
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m_ob->UnregisterActuator(this);
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m_ob = (SCA_IObject*)gameobj;
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if (m_ob)
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m_ob->RegisterActuator(this);
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Py_Return;
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}
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PyErr_Clear();
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char* objectname;
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if (PyArg_ParseTuple(args, "s", &objectname))
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{
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SCA_IObject *object = (SCA_IObject*)SCA_ILogicBrick::m_sCurrentLogicManager->GetGameObjectByName(STR_String(objectname));
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if(object)
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{
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if (m_ob != NULL)
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m_ob->UnregisterActuator(this);
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m_ob = object;
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m_ob->RegisterActuator(this);
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Py_Return;
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}
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}
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return NULL;
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}
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/* get min ---------------------------------------------------------- */
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char KX_CameraActuator::GetMin_doc[] =
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"getMin\n"
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"\tReturns the minimum value set in the Min: field.\n";
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PyObject* KX_CameraActuator::PyGetMin(PyObject* self,
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PyObject* args,
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PyObject* kwds)
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{
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return PyFloat_FromDouble(m_minHeight);
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}
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/* set min ---------------------------------------------------------- */
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char KX_CameraActuator::SetMin_doc[] =
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"setMin\n"
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"\tSets the minimum value.\n";
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PyObject* KX_CameraActuator::PySetMin(PyObject* self,
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PyObject* args,
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PyObject* kwds)
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{
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float min;
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if(PyArg_ParseTuple(args,"f", &min))
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{
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m_minHeight = min;
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Py_Return;
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}
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return NULL;
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}
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/* get min ---------------------------------------------------------- */
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char KX_CameraActuator::GetMax_doc[] =
|
|
"getMax\n"
|
|
"\tReturns the maximum value set in the Max: field.\n";
|
|
PyObject* KX_CameraActuator::PyGetMax(PyObject* self,
|
|
PyObject* args,
|
|
PyObject* kwds)
|
|
{
|
|
return PyFloat_FromDouble(m_maxHeight);
|
|
}
|
|
/* set min ---------------------------------------------------------- */
|
|
char KX_CameraActuator::SetMax_doc[] =
|
|
"setMax\n"
|
|
"\tSets the maximum value.\n";
|
|
PyObject* KX_CameraActuator::PySetMax(PyObject* self,
|
|
PyObject* args,
|
|
PyObject* kwds)
|
|
{
|
|
float max;
|
|
if(PyArg_ParseTuple(args,"f", &max))
|
|
{
|
|
m_maxHeight = max;
|
|
Py_Return;
|
|
}
|
|
return NULL;
|
|
}
|
|
/* get height ---------------------------------------------------------- */
|
|
char KX_CameraActuator::GetHeight_doc[] =
|
|
"getHeight\n"
|
|
"\tReturns the height value set in the height: field.\n";
|
|
PyObject* KX_CameraActuator::PyGetHeight(PyObject* self,
|
|
PyObject* args,
|
|
PyObject* kwds)
|
|
{
|
|
return PyFloat_FromDouble(m_height);
|
|
}
|
|
/* set height ---------------------------------------------------------- */
|
|
char KX_CameraActuator::SetHeight_doc[] =
|
|
"setHeight\n"
|
|
"\tSets the height value.\n";
|
|
PyObject* KX_CameraActuator::PySetHeight(PyObject* self,
|
|
PyObject* args,
|
|
PyObject* kwds)
|
|
{
|
|
float height;
|
|
if(PyArg_ParseTuple(args,"f", &height))
|
|
{
|
|
m_height = height;
|
|
Py_Return;
|
|
}
|
|
return NULL;
|
|
}
|
|
/* set XY ---------------------------------------------------------- */
|
|
char KX_CameraActuator::SetXY_doc[] =
|
|
"setXY\n"
|
|
"\tSets axis the camera tries to get behind.\n"
|
|
"\t1=x, 0=y\n";
|
|
PyObject* KX_CameraActuator::PySetXY(PyObject* self,
|
|
PyObject* args,
|
|
PyObject* kwds)
|
|
{
|
|
int value;
|
|
if(PyArg_ParseTuple(args,"i", &value))
|
|
{
|
|
m_x = value != 0;
|
|
Py_Return;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* get XY -------------------------------------------------------------*/
|
|
char KX_CameraActuator::GetXY_doc[] =
|
|
"getXY\n"
|
|
"\tGets the axis the camera tries to get behind.\n"
|
|
"\tTrue = X, False = Y\n";
|
|
PyObject* KX_CameraActuator::PyGetXY(PyObject* self,
|
|
PyObject* args,
|
|
PyObject* kwds)
|
|
{
|
|
return PyInt_FromLong(m_x);
|
|
}
|
|
|
|
/* eof */
|