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* $Id: point.c 14444 2008-04-16 22:40:48Z hos $
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* ***** BEGIN GPL LICENSE BLOCK *****
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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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* 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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* 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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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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* This is a new part of Blender.
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* Contributor(s): Joseph Gilbert
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* ***** END GPL LICENSE BLOCK *****
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#include "Mathutils.h"
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#include "BLI_blenlib.h"
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#include "BKE_utildefines.h"
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#include "gen_utils.h"
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//-------------------------DOC STRINGS ---------------------------
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char Point_Zero_doc[] = "() - set all values in the point to 0";
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char Point_toVector_doc[] = "() - create a vector representation of this point";
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//-----------------------METHOD DEFINITIONS ----------------------
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struct PyMethodDef Point_methods[] = {
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{"zero", (PyCFunction) Point_Zero, METH_NOARGS, Point_Zero_doc},
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{"toVector", (PyCFunction) Point_toVector, METH_NOARGS, Point_toVector_doc},
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//-----------------------------METHODS----------------------------
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//--------------------------Vector.toPoint()----------------------
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//create a new point object to represent this vector
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PyObject *Point_toVector(PointObject * self)
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for(x = 0; x < self->size; x++){
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vec[x] = self->coord[x];
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return newVectorObject(vec, self->size, Py_NEW);
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//----------------------------Point.zero() ----------------------
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//set the point data to 0,0,0
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PyObject *Point_Zero(PointObject * self)
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for(x = 0; x < self->size; x++) {
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self->coord[x] = 0.0f;
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return EXPP_incr_ret((PyObject*)self);
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//----------------------------dealloc()(internal) ----------------
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static void Point_dealloc(PointObject * self)
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Py_XDECREF(self->coerced_object);
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if(self->data.py_data){
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PyMem_Free(self->data.py_data);
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//----------------------------getattr()(internal) ----------------
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//object.attribute access (get)
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static PyObject *Point_getattr(PointObject * self, char *name)
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return PyFloat_FromDouble(self->coord[0]);
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}else if(STREQ(name, "y")){
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return PyFloat_FromDouble(self->coord[1]);
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}else if(STREQ(name, "z")){
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return PyFloat_FromDouble(self->coord[2]);
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return EXPP_ReturnPyObjError(PyExc_AttributeError,
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"point.z: illegal attribute access\n");
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if(STREQ(name, "wrapped")){
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if(self->wrapped == Py_WRAP)
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return EXPP_incr_ret((PyObject *)Py_True);
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return EXPP_incr_ret((PyObject *)Py_False);
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return Py_FindMethod(Point_methods, (PyObject *) self, name);
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//----------------------------setattr()(internal) ----------------
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//object.attribute access (set)
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static int Point_setattr(PointObject * self, char *name, PyObject * v)
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f = PyNumber_Float(v);
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if(f == NULL) { // parsed item not a number
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return EXPP_ReturnIntError(PyExc_TypeError,
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"point.attribute = x: argument not a number\n");
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self->coord[0] = (float)PyFloat_AS_DOUBLE(f);
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}else if(STREQ(name, "y")){
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self->coord[1] = (float)PyFloat_AS_DOUBLE(f);
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}else if(STREQ(name, "z")){
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self->coord[2] = (float)PyFloat_AS_DOUBLE(f);
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return EXPP_ReturnIntError(PyExc_AttributeError,
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"point.z = x: illegal attribute access\n");
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return EXPP_ReturnIntError(PyExc_AttributeError,
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"point.attribute = x: unknown attribute\n");
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//----------------------------print object (internal)-------------
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//print the object to screen
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static PyObject *Point_repr(PointObject * self)
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char buffer[48], str[1024];
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BLI_strncpy(str,"[",1024);
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for(i = 0; i < self->size; i++){
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if(i < (self->size - 1)){
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sprintf(buffer, "%.6f, ", self->coord[i]);
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sprintf(buffer, "%.6f", self->coord[i]);
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strcat(str, "](point)");
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return PyString_FromString(str);
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//---------------------SEQUENCE PROTOCOLS------------------------
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//----------------------------len(object)------------------------
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static int Point_len(PointObject * self)
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//----------------------------object[]---------------------------
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//sequence accessor (get)
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static PyObject *Point_item(PointObject * self, int i)
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if(i < 0 || i >= self->size)
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return EXPP_ReturnPyObjError(PyExc_IndexError,
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"point[attribute]: array index out of range\n");
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return PyFloat_FromDouble( (double)self->coord[i] );
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//----------------------------object[]-------------------------
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//sequence accessor (set)
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static int Point_ass_item(PointObject * self, int i, PyObject * ob)
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f = PyNumber_Float(ob);
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if(f == NULL) { // parsed item not a number
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return EXPP_ReturnIntError(PyExc_TypeError,
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"point[attribute] = x: argument not a number\n");
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if(i < 0 || i >= self->size){
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return EXPP_ReturnIntError(PyExc_IndexError,
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"point[attribute] = x: array assignment index out of range\n");
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self->coord[i] = (float)PyFloat_AS_DOUBLE(f);
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//----------------------------object[z:y]------------------------
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//sequence slice (get)
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static PyObject *Point_slice(PointObject * self, int begin, int end)
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PyObject *list = NULL;
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CLAMP(begin, 0, self->size);
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CLAMP(end, 0, self->size);
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begin = MIN2(begin,end);
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list = PyList_New(end - begin);
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for(count = begin; count < end; count++) {
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PyList_SetItem(list, count - begin,
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PyFloat_FromDouble(self->coord[count]));
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//----------------------------object[z:y]------------------------
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//sequence slice (set)
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static int Point_ass_slice(PointObject * self, int begin, int end,
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CLAMP(begin, 0, self->size);
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CLAMP(end, 0, self->size);
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begin = MIN2(begin,end);
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size = PySequence_Length(seq);
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if(size != (end - begin)){
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return EXPP_ReturnIntError(PyExc_TypeError,
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"point[begin:end] = []: size mismatch in slice assignment\n");
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for (i = 0; i < size; i++) {
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v = PySequence_GetItem(seq, i);
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if (v == NULL) { // Failed to read sequence
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return EXPP_ReturnIntError(PyExc_RuntimeError,
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"point[begin:end] = []: unable to read sequence\n");
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f = PyNumber_Float(v);
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if(f == NULL) { // parsed item not a number
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return EXPP_ReturnIntError(PyExc_TypeError,
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"point[begin:end] = []: sequence argument not a number\n");
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coord[i] = (float)PyFloat_AS_DOUBLE(f);
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//parsed well - now set in point
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for(y = 0; y < size; y++){
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self->coord[begin + y] = coord[y];
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//------------------------NUMERIC PROTOCOLS----------------------
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//------------------------obj + obj------------------------------
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static PyObject *Point_add(PyObject * v1, PyObject * v2)
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PointObject *coord1 = NULL, *coord2 = NULL;
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VectorObject *vec = NULL;
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coord1 = (PointObject*)v1;
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coord2 = (PointObject*)v2;
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if(!coord1->coerced_object){
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if(coord2->coerced_object){
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if(VectorObject_Check(coord2->coerced_object)){ //POINT + VECTOR
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vec = (VectorObject*)coord2->coerced_object;
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if(vec->size == size){
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for(x = 0; x < size; x++){
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coord[x] = coord1->coord[x] + vec->vec[x];
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return EXPP_ReturnPyObjError(PyExc_AttributeError,
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"Point addition: arguments are the wrong size....\n");
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return newPointObject(coord, size, Py_NEW);
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}else{ //POINT + POINT
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if(coord2->size == size){
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for(x = 0; x < size; x++) {
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coord[x] = coord1->coord[x] + coord2->coord[x];
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return EXPP_ReturnPyObjError(PyExc_AttributeError,
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"Point addition: arguments are the wrong size....\n");
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return newPointObject(coord, size, Py_NEW);
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return EXPP_ReturnPyObjError(PyExc_AttributeError,
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"Point addition: arguments not valid for this operation....\n");
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//------------------------obj - obj------------------------------
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static PyObject *Point_sub(PyObject * v1, PyObject * v2)
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PointObject *coord1 = NULL, *coord2 = NULL;
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coord1 = (PointObject*)v1;
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coord2 = (PointObject*)v2;
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if(coord1->coerced_object || coord2->coerced_object){
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return EXPP_ReturnPyObjError(PyExc_AttributeError,
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"Point subtraction: arguments not valid for this operation....\n");
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if(coord1->size != coord2->size){
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return EXPP_ReturnPyObjError(PyExc_AttributeError,
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"Point subtraction: points must have the same dimensions for this operation\n");
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for(x = 0; x < size; x++) {
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coord[x] = coord1->coord[x] - coord2->coord[x];
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//Point - Point = Vector
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return newVectorObject(coord, size, Py_NEW);
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//------------------------obj * obj------------------------------
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static PyObject *Point_mul(PyObject * p1, PyObject * p2)
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float coord[3], scalar;
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PointObject *coord1 = NULL, *coord2 = NULL;
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MatrixObject *mat = NULL;
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QuaternionObject *quat = NULL;
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coord1 = (PointObject*)p1;
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coord2 = (PointObject*)p2;
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if(coord1->coerced_object){
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if (PyFloat_Check(coord1->coerced_object) ||
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PyInt_Check(coord1->coerced_object)){ // FLOAT/INT * POINT
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f = PyNumber_Float(coord1->coerced_object);
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if(f == NULL) { // parsed item not a number
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return EXPP_ReturnPyObjError(PyExc_TypeError,
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"Point multiplication: arguments not acceptable for this operation\n");
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scalar = (float)PyFloat_AS_DOUBLE(f);
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for(x = 0; x < size; x++) {
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coord[x] = coord2->coord[x] * scalar;
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return newPointObject(coord, size, Py_NEW);
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if(coord2->coerced_object){
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if (PyFloat_Check(coord2->coerced_object) ||
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PyInt_Check(coord2->coerced_object)){ // POINT * FLOAT/INT
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f = PyNumber_Float(coord2->coerced_object);
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if(f == NULL) { // parsed item not a number
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return EXPP_ReturnPyObjError(PyExc_TypeError,
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"Point multiplication: arguments not acceptable for this operation\n");
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scalar = (float)PyFloat_AS_DOUBLE(f);
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for(x = 0; x < size; x++) {
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coord[x] = coord1->coord[x] * scalar;
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return newPointObject(coord, size, Py_NEW);
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}else if(MatrixObject_Check(coord2->coerced_object)){ //POINT * MATRIX
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mat = (MatrixObject*)coord2->coerced_object;
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return row_point_multiplication(coord1, mat);
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}else if(QuaternionObject_Check(coord2->coerced_object)){ //POINT * QUATERNION
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quat = (QuaternionObject*)coord2->coerced_object;
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if(coord1->size != 3){
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return EXPP_ReturnPyObjError(PyExc_TypeError,
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"Point multiplication: only 3D point rotations (with quats) currently supported\n");
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return quat_rotation((PyObject*)coord1, (PyObject*)quat);
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return EXPP_ReturnPyObjError(PyExc_TypeError,
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"Point multiplication: arguments not acceptable for this operation\n");
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//-------------------------- -obj -------------------------------
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//returns the negative of this object
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static PyObject *Point_neg(PointObject *self)
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for(x = 0; x < self->size; x++)
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coord[x] = -self->coord[x];
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return newPointObject(coord, self->size, Py_NEW);
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//------------------------coerce(obj, obj)-----------------------
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//coercion of unknown types to type PointObject for numeric protocols
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/*Coercion() is called whenever a math operation has 2 operands that
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it doesn't understand how to evaluate. 2+Matrix for example. We want to
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evaluate some of these operations like: (vector * 2), however, for math
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to proceed, the unknown operand must be cast to a type that python math will
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understand. (e.g. in the case above case, 2 must be cast to a vector and
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then call vector.multiply(vector, scalar_cast_as_vector)*/
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static int Point_coerce(PyObject ** p1, PyObject ** p2)
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if(VectorObject_Check(*p2) || PyFloat_Check(*p2) || PyInt_Check(*p2) ||
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MatrixObject_Check(*p2) || QuaternionObject_Check(*p2)) {
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PyObject *coerced = EXPP_incr_ret(*p2);
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*p2 = newPointObject(NULL,3,Py_NEW);
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((PointObject*)*p2)->coerced_object = coerced;
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return EXPP_ReturnIntError(PyExc_TypeError,
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"point.coerce(): unknown operand - can't coerce for numeric protocols");
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//-----------------PROTOCOL DECLARATIONS--------------------------
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static PySequenceMethods Point_SeqMethods = {
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(inquiry) Point_len, /* sq_length */
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(binaryfunc) 0, /* sq_concat */
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(intargfunc) 0, /* sq_repeat */
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(intargfunc) Point_item, /* sq_item */
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(intintargfunc) Point_slice, /* sq_slice */
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(intobjargproc) Point_ass_item, /* sq_ass_item */
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(intintobjargproc) Point_ass_slice, /* sq_ass_slice */
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static PyNumberMethods Point_NumMethods = {
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(binaryfunc) Point_add, /* __add__ */
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(binaryfunc) Point_sub, /* __sub__ */
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(binaryfunc) Point_mul, /* __mul__ */
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(binaryfunc) 0, /* __div__ */
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(binaryfunc) 0, /* __mod__ */
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(binaryfunc) 0, /* __divmod__ */
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(ternaryfunc) 0, /* __pow__ */
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(unaryfunc) Point_neg, /* __neg__ */
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(unaryfunc) 0, /* __pos__ */
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(unaryfunc) 0, /* __abs__ */
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(inquiry) 0, /* __nonzero__ */
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(unaryfunc) 0, /* __invert__ */
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(binaryfunc) 0, /* __lshift__ */
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(binaryfunc) 0, /* __rshift__ */
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(binaryfunc) 0, /* __and__ */
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(binaryfunc) 0, /* __xor__ */
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(binaryfunc) 0, /* __or__ */
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(coercion) Point_coerce, /* __coerce__ */
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(unaryfunc) 0, /* __int__ */
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(unaryfunc) 0, /* __long__ */
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(unaryfunc) 0, /* __float__ */
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(unaryfunc) 0, /* __oct__ */
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(unaryfunc) 0, /* __hex__ */
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//------------------PY_OBECT DEFINITION--------------------------
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PyTypeObject point_Type = {
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PyObject_HEAD_INIT(NULL)
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"point", /*tp_name */
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sizeof(PointObject), /*tp_basicsize */
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(destructor) Point_dealloc, /*tp_dealloc */
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(printfunc) 0, /*tp_print */
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(getattrfunc) Point_getattr, /*tp_getattr */
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(setattrfunc) Point_setattr, /*tp_setattr */
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(reprfunc) Point_repr, /*tp_repr */
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&Point_NumMethods, /*tp_as_number */
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&Point_SeqMethods, /*tp_as_sequence */
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//------------------------newPointObject (internal)-------------
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//creates a new point object
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/*pass Py_WRAP - if point is a WRAPPER for data allocated by BLENDER
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(i.e. it was allocated elsewhere by MEM_mallocN())
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pass Py_NEW - if point is not a WRAPPER and managed by PYTHON
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(i.e. it must be created here with PyMEM_malloc())*/
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PyObject *newPointObject(float *coord, int size, int type)
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point_Type.ob_type = &PyType_Type;
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self = PyObject_NEW(PointObject, &point_Type);
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self->data.blend_data = NULL;
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self->data.py_data = NULL;
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if(size > 3 || size < 2)
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self->coerced_object = NULL;
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self->data.blend_data = coord;
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self->coord = self->data.blend_data;
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self->wrapped = Py_WRAP;
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}else if (type == Py_NEW){
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self->data.py_data = PyMem_Malloc(size * sizeof(float));
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self->coord = self->data.py_data;
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if(!coord) { //new empty
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for(x = 0; x < size; x++){
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self->coord[x] = 0.0f;
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for(x = 0; x < size; x++){
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self->coord[x] = coord[x];
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self->wrapped = Py_NEW;
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return (PyObject *) self;
added
removed
source/blender/python/api2_2x/point.c
