/** * KX_CameraActuator.cpp * * $Id: KX_CameraActuator.cpp 28254 2010-04-18 10:28:37Z campbellbarton $ * * ***** 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) 2001-2002 by NaN Holding BV. * All rights reserved. * * The Original Code is: all of this file. * * Contributor(s): none yet. * * ***** END GPL LICENSE BLOCK ***** * */ #include "KX_CameraActuator.h" #include #include #include #include "KX_GameObject.h" #include "PyObjectPlus.h" /* ------------------------------------------------------------------------- */ /* Native functions */ /* ------------------------------------------------------------------------- */ KX_CameraActuator::KX_CameraActuator( SCA_IObject* gameobj, SCA_IObject *obj, float hght, float minhght, float maxhght, bool xytog ): SCA_IActuator(gameobj, KX_ACT_CAMERA), m_ob (obj), m_height (hght), m_minHeight (minhght), m_maxHeight (maxhght), m_x (xytog) { if (m_ob) m_ob->RegisterActuator(this); } KX_CameraActuator::~KX_CameraActuator() { if (m_ob) m_ob->UnregisterActuator(this); } CValue* KX_CameraActuator:: GetReplica( ) { KX_CameraActuator* replica = new KX_CameraActuator(*this); replica->ProcessReplica(); return replica; }; void KX_CameraActuator::ProcessReplica() { if (m_ob) m_ob->RegisterActuator(this); SCA_IActuator::ProcessReplica(); } bool KX_CameraActuator::UnlinkObject(SCA_IObject* clientobj) { if (clientobj == m_ob) { // this object is being deleted, we cannot continue to track it. m_ob = NULL; return true; } return false; } void KX_CameraActuator::Relink(GEN_Map *obj_map) { void **h_obj = (*obj_map)[m_ob]; if (h_obj) { if (m_ob) m_ob->UnregisterActuator(this); m_ob = (SCA_IObject*)(*h_obj); m_ob->RegisterActuator(this); } } /* three functions copied from blender arith... don't know if there's an equivalent */ static float Kx_Normalize(float *n) { float d; d= n[0]*n[0]+n[1]*n[1]+n[2]*n[2]; /* FLT_EPSILON is too large! A larger value causes normalize errors in a scaled down utah teapot */ if(d>0.0000000000001) { d= sqrt(d); n[0]/=d; n[1]/=d; n[2]/=d; } else { n[0]=n[1]=n[2]= 0.0; d= 0.0; } return d; } static void Kx_Crossf(float *c, float *a, float *b) { c[0] = a[1] * b[2] - a[2] * b[1]; c[1] = a[2] * b[0] - a[0] * b[2]; c[2] = a[0] * b[1] - a[1] * b[0]; } static void Kx_VecUpMat3(float *vec, float mat[][3], short axis) { // Construct a camera matrix s.t. the specified axis // maps to the given vector (*vec). Also defines the rotation // about this axis by mapping one of the other axis to the y-axis. float inp; short cox = 0, coy = 0, coz = 0; /* up varieeren heeft geen zin, is eigenlijk helemaal geen up! * zie VecUpMat3old */ if(axis==0) { cox= 0; coy= 1; coz= 2; /* Y up Z tr */ } if(axis==1) { cox= 1; coy= 2; coz= 0; /* Z up X tr */ } if(axis==2) { cox= 2; coy= 0; coz= 1; /* X up Y tr */ } if(axis==3) { cox= 0; coy= 1; coz= 2; /* Y op -Z tr */ vec[0]= -vec[0]; vec[1]= -vec[1]; vec[2]= -vec[2]; } if(axis==4) { cox= 1; coy= 0; coz= 2; /* */ } if(axis==5) { cox= 2; coy= 1; coz= 0; /* Y up X tr */ } mat[coz][0]= vec[0]; mat[coz][1]= vec[1]; mat[coz][2]= vec[2]; if (Kx_Normalize((float *)mat[coz]) == 0.f) { /* this is a very abnormal situation: the camera has reach the object center exactly We will choose a completely arbitrary direction */ mat[coz][0] = 1.0f; mat[coz][1] = 0.0f; mat[coz][2] = 0.0f; } inp= mat[coz][2]; mat[coy][0]= - inp*mat[coz][0]; mat[coy][1]= - inp*mat[coz][1]; mat[coy][2]= 1.0 - inp*mat[coz][2]; if (Kx_Normalize((float *)mat[coy]) == 0.f) { /* the camera is vertical, chose the y axis arbitrary */ mat[coy][0] = 0.f; mat[coy][1] = 1.f; mat[coy][2] = 0.f; } Kx_Crossf(mat[cox], mat[coy], mat[coz]); } bool KX_CameraActuator::Update(double curtime, bool frame) { /* wondering... is it really neccesary/desirable to suppress negative */ /* events here? */ bool bNegativeEvent = IsNegativeEvent(); RemoveAllEvents(); if (bNegativeEvent || !m_ob) return false; KX_GameObject *obj = (KX_GameObject*) GetParent(); MT_Point3 from = obj->NodeGetWorldPosition(); MT_Matrix3x3 frommat = obj->NodeGetWorldOrientation(); /* These casts are _very_ dangerous!!! */ MT_Point3 lookat = ((KX_GameObject*)m_ob)->NodeGetWorldPosition(); MT_Matrix3x3 actormat = ((KX_GameObject*)m_ob)->NodeGetWorldOrientation(); float fp1[3], fp2[3], rc[3]; float inp, fac; //, factor = 0.0; /* some factor... */ float mindistsq, maxdistsq, distsq; float mat[3][3]; /* The rules: */ /* CONSTRAINT 1: not implemented */ /* CONSTRAINT 2: can camera see actor? */ /* CONSTRAINT 3: fixed height relative to floor below actor. */ /* CONSTRAINT 4: camera rotates behind actor */ /* CONSTRAINT 5: minimum / maximum distance */ /* CONSTRAINT 6: again: fixed height relative to floor below actor */ /* CONSTRAINT 7: track to floor below actor */ /* CONSTRAINT 8: look a little bit left or right, depending on how the character is looking (horizontal x) */ /* ...and then set the camera position. Since we assume the parent of */ /* this actuator is always a camera, just set the parent position and */ /* rotation. We do not check whether we really have a camera as parent. */ /* It may be better to turn this into a general tracking actuator later */ /* on, since lots of plausible relations can be filled in here. */ /* ... set up some parameters ... */ /* missing here: the 'floorloc' of the actor's shadow */ mindistsq= m_minHeight*m_minHeight; maxdistsq= m_maxHeight*m_maxHeight; /* C1: not checked... is a future option */ /* C2: blender test_visibility function. Can this be a ray-test? */ /* C3: fixed height */ from[2] = (15.0*from[2] + lookat[2] + m_height)/16.0; /* C4: camera behind actor */ if (m_x) { fp1[0] = actormat[0][0]; fp1[1] = actormat[1][0]; fp1[2] = actormat[2][0]; fp2[0] = frommat[0][0]; fp2[1] = frommat[1][0]; fp2[2] = frommat[2][0]; } else { fp1[0] = actormat[0][1]; fp1[1] = actormat[1][1]; fp1[2] = actormat[2][1]; fp2[0] = frommat[0][1]; fp2[1] = frommat[1][1]; fp2[2] = frommat[2][1]; } inp= fp1[0]*fp2[0] + fp1[1]*fp2[1] + fp1[2]*fp2[2]; fac= (-1.0 + inp)/32.0; from[0]+= fac*fp1[0]; from[1]+= fac*fp1[1]; from[2]+= fac*fp1[2]; /* alleen alstie ervoor ligt: cross testen en loodrechte bijtellen */ if(inp<0.0) { if(fp1[0]*fp2[1] - fp1[1]*fp2[0] > 0.0) { from[0]-= fac*fp1[1]; from[1]+= fac*fp1[0]; } else { from[0]+= fac*fp1[1]; from[1]-= fac*fp1[0]; } } /* CONSTRAINT 5: minimum / maximum afstand */ rc[0]= (lookat[0]-from[0]); rc[1]= (lookat[1]-from[1]); rc[2]= (lookat[2]-from[2]); distsq= rc[0]*rc[0] + rc[1]*rc[1] + rc[2]*rc[2]; if(distsq > maxdistsq) { distsq = 0.15*(distsq-maxdistsq)/distsq; from[0] += distsq*rc[0]; from[1] += distsq*rc[1]; from[2] += distsq*rc[2]; } else if(distsq < mindistsq) { distsq = 0.15*(mindistsq-distsq)/mindistsq; from[0] -= distsq*rc[0]; from[1] -= distsq*rc[1]; from[2] -= distsq*rc[2]; } /* CONSTRAINT 7: track to schaduw */ rc[0]= (lookat[0]-from[0]); rc[1]= (lookat[1]-from[1]); rc[2]= (lookat[2]-from[2]); Kx_VecUpMat3(rc, mat, 3); /* y up Track -z */ /* now set the camera position and rotation */ obj->NodeSetLocalPosition(from); actormat[0][0]= mat[0][0]; actormat[0][1]= mat[1][0]; actormat[0][2]= mat[2][0]; actormat[1][0]= mat[0][1]; actormat[1][1]= mat[1][1]; actormat[1][2]= mat[2][1]; actormat[2][0]= mat[0][2]; actormat[2][1]= mat[1][2]; actormat[2][2]= mat[2][2]; obj->NodeSetLocalOrientation(actormat); return true; } CValue *KX_CameraActuator::findObject(char *obName) { /* hook to object system */ return NULL; } #ifndef DISABLE_PYTHON /* ------------------------------------------------------------------------- */ /* Python functions */ /* ------------------------------------------------------------------------- */ /* Integration hooks ------------------------------------------------------- */ PyTypeObject KX_CameraActuator::Type = { PyVarObject_HEAD_INIT(NULL, 0) "KX_CameraActuator", sizeof(PyObjectPlus_Proxy), 0, py_base_dealloc, 0, 0, 0, 0, py_base_repr, 0,0,0,0,0,0,0,0,0, Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, 0,0,0,0,0,0,0, Methods, 0, 0, &SCA_IActuator::Type, 0,0,0,0,0,0, py_base_new }; PyMethodDef KX_CameraActuator::Methods[] = { {NULL, NULL} //Sentinel }; PyAttributeDef KX_CameraActuator::Attributes[] = { KX_PYATTRIBUTE_FLOAT_RW("min",-FLT_MAX,FLT_MAX,KX_CameraActuator,m_minHeight), KX_PYATTRIBUTE_FLOAT_RW("max",-FLT_MAX,FLT_MAX,KX_CameraActuator,m_maxHeight), KX_PYATTRIBUTE_FLOAT_RW("height",-FLT_MAX,FLT_MAX,KX_CameraActuator,m_height), KX_PYATTRIBUTE_BOOL_RW("useXY",KX_CameraActuator,m_x), KX_PYATTRIBUTE_RW_FUNCTION("object", KX_CameraActuator, pyattr_get_object, pyattr_set_object), {NULL} }; PyObject* KX_CameraActuator::pyattr_get_object(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef) { KX_CameraActuator* self= static_cast(self_v); if (self->m_ob==NULL) Py_RETURN_NONE; else return self->m_ob->GetProxy(); } int KX_CameraActuator::pyattr_set_object(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value) { KX_CameraActuator* self= static_cast(self_v); KX_GameObject *gameobj; if (!ConvertPythonToGameObject(value, &gameobj, true, "actuator.object = value: KX_CameraActuator")) return PY_SET_ATTR_FAIL; // ConvertPythonToGameObject sets the error if (self->m_ob) self->m_ob->UnregisterActuator(self); if ((self->m_ob = (SCA_IObject*)gameobj)) self->m_ob->RegisterActuator(self); return PY_SET_ATTR_SUCCESS; } #endif // DISABLE_PYTHON /* eof */