Add matricies to Python module.

1 files changed, 342 insertions, 0 deletions

diff --git a/libdimension-python/Matrix.c b/libdimension-python/Matrix.c
new file mode 100644
index 0000000..a414622
--- /dev/null
+++ b/libdimension-python/Matrix.c
@@ -0,0 +1,342 @@
+/*************************************************************************
+ * Copyright (C) 2009-2011 Tavian Barnes <tavianator@tavianator.com>     *
+ *                                                                       *
+ * This file is part of The Dimension Python Module.                     *
+ *                                                                       *
+ * The Dimension Python Module is free software; you can redistribute it *
+ * and/ or modify it under the terms of the GNU Lesser General Public    *
+ * License as published by the Free Software Foundation; either version  *
+ * 3 of the License, or (at your option) any later version.              *
+ *                                                                       *
+ * The Dimension Python Module 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 Lesser General Public License for more details.               *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+#include "Vector.h"
+#include "Matrix.h"
+
+static int
+dmnsn_py_Matrix_init(dmnsn_py_Matrix *self, PyObject *args, PyObject *kwds)
+{
+  if (kwds) {
+    PyErr_SetString(PyExc_TypeError, "Keyword arguments not supported");
+    return -1;
+  }
+
+  if (!PyArg_ParseTuple(args, "dddddddddddd",
+                        &self->m.n[0][0], &self->m.n[0][1], &self->m.n[0][2],
+                        &self->m.n[0][3],
+                        &self->m.n[1][0], &self->m.n[1][1], &self->m.n[1][2],
+                        &self->m.n[1][3],
+                        &self->m.n[2][0], &self->m.n[2][1], &self->m.n[2][2],
+                        &self->m.n[2][3]))
+    return -1;
+
+  return 0;
+}
+
+PyObject *
+dmnsn_py_Matrix_scale(PyObject *self, PyObject *args, PyObject *kwds)
+{
+  dmnsn_vector scale;
+  if (dmnsn_py_Vector_args(&scale, args, kwds)) {
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_scale_matrix(scale);
+    }
+    return (PyObject *)ret;
+  } else {
+    PyErr_Clear();
+    if (kwds) {
+      PyErr_SetString(PyExc_TypeError,
+                      "Keywords only make sense for component syntax");
+      return NULL;
+    }
+
+    dmnsn_py_Vector *scale;
+    if (!PyArg_ParseTuple(args, "O!", &dmnsn_py_VectorType, &scale))
+      return NULL;
+
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_scale_matrix(scale->v);
+    }
+    return (PyObject *)ret;
+  }
+}
+
+PyObject *
+dmnsn_py_Matrix_translate(PyObject *self, PyObject *args, PyObject *kwds)
+{
+  dmnsn_vector translate;
+  if (dmnsn_py_Vector_args(&translate, args, kwds)) {
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_translation_matrix(translate);
+    }
+    return (PyObject *)ret;
+  } else {
+    PyErr_Clear();
+    if (kwds) {
+      PyErr_SetString(PyExc_TypeError,
+                      "Keywords only make sense for component syntax");
+      return NULL;
+    }
+
+    dmnsn_py_Vector *translate;
+    if (!PyArg_ParseTuple(args, "O!", &dmnsn_py_VectorType, &translate))
+      return NULL;
+
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_translation_matrix(translate->v);
+    }
+    return (PyObject *)ret;
+  }
+}
+
+PyObject *
+dmnsn_py_Matrix_rotate(PyObject *self, PyObject *args, PyObject *kwds)
+{
+  dmnsn_vector rotate;
+  if (dmnsn_py_Vector_args(&rotate, args, kwds)) {
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_rotation_matrix(dmnsn_vector_mul(dmnsn_radians(1.0),
+                                                      rotate));
+    }
+    return (PyObject *)ret;
+  } else {
+    PyErr_Clear();
+    if (kwds) {
+      PyErr_SetString(PyExc_TypeError,
+                      "Keywords only make sense for component syntax");
+      return NULL;
+    }
+
+    dmnsn_py_Vector *rotate;
+    if (!PyArg_ParseTuple(args, "O!", &dmnsn_py_VectorType, &rotate))
+      return NULL;
+
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_rotation_matrix(dmnsn_vector_mul(dmnsn_radians(1.0),
+                                                      rotate->v));
+    }
+    return (PyObject *)ret;
+  }
+}
+
+static PyObject *
+dmnsn_py_Matrix_repr(dmnsn_py_Matrix *self)
+{
+  PyObject *floats[3][4] = { { NULL } };
+  bool initialized = true;
+  for (size_t i = 0; i < 3; ++i) {
+    for (size_t j = 0; j < 4; ++j) {
+      floats[i][j] = PyFloat_FromDouble(self->m.n[i][j]);
+      if (!floats[i][j]) {
+        initialized = false;
+        break;
+      }
+    }
+    if (!initialized)
+      break;
+  }
+
+  if (!initialized) {
+    for (size_t i = 0; i < 3; ++i) {
+      for (size_t j = 0; j < 4; ++j) {
+        Py_XDECREF(floats[i][j]);
+      }
+    }
+    return NULL;
+  }
+
+  PyObject *repr = PyUnicode_FromFormat("dimension.Matrix(%R, %R, %R, %R,"
+                                                         "%R, %R, %R, %R,"
+                                                         "%R, %R, %R, %R)",
+                                        floats[0][0], floats[0][1],
+                                        floats[0][2], floats[0][3],
+                                        floats[1][0], floats[1][1],
+                                        floats[1][2], floats[1][3],
+                                        floats[2][0], floats[2][1],
+                                        floats[2][2], floats[2][3]);
+  for (size_t i = 0; i < 3; ++i) {
+    for (size_t j = 0; j < 4; ++j) {
+      Py_DECREF(floats[i][j]);
+    }
+  }
+  return repr;
+}
+
+static PyObject *
+dmnsn_py_Matrix_str(dmnsn_py_Matrix *self)
+{
+  PyObject *floats[3][4] = { { NULL } };
+  bool initialized = true;
+  for (size_t i = 0; i < 3; ++i) {
+    for (size_t j = 0; j < 4; ++j) {
+      floats[i][j] = PyFloat_FromDouble(self->m.n[i][j]);
+      if (!floats[i][j]) {
+        initialized = false;
+        break;
+      }
+    }
+    if (!initialized)
+      break;
+  }
+
+  if (!initialized) {
+    for (size_t i = 0; i < 3; ++i) {
+      for (size_t j = 0; j < 4; ++j) {
+        Py_XDECREF(floats[i][j]);
+      }
+    }
+    return NULL;
+  }
+
+  PyObject *str = PyUnicode_FromFormat("\n[%S\t%S\t%S\t%S]\n"
+                                       "[%S\t%S\t%S\t%S]\n"
+                                       "[%S\t%S\t%S\t%S]\n"
+                                       "[0.0\t0.0\t0.0\t1.0]",
+                                        floats[0][0], floats[0][1],
+                                        floats[0][2], floats[0][3],
+                                        floats[1][0], floats[1][1],
+                                        floats[1][2], floats[1][3],
+                                        floats[2][0], floats[2][1],
+                                        floats[2][2], floats[2][3]);
+  for (size_t i = 0; i < 3; ++i) {
+    for (size_t j = 0; j < 4; ++j) {
+      Py_DECREF(floats[i][j]);
+    }
+  }
+  return str;
+}
+
+static PyObject *
+dmnsn_py_Matrix_richcompare(PyObject *lhs, PyObject *rhs, int op)
+{
+  if (!PyObject_TypeCheck(lhs, &dmnsn_py_MatrixType)
+      || !PyObject_TypeCheck(rhs, &dmnsn_py_MatrixType))
+  {
+    PyErr_SetString(PyExc_TypeError,
+                    "Matricies can only be compared with Matricies");
+    return NULL;
+  }
+
+  dmnsn_py_Matrix *mlhs = (dmnsn_py_Matrix *)lhs;
+  dmnsn_py_Matrix *mrhs = (dmnsn_py_Matrix *)rhs;
+
+  double sqdiff = 0.0;
+  for (size_t i = 0; i < 3; ++i) {
+    for (size_t j = 0; j < 4; ++j) {
+      double diff = mlhs->m.n[i][j] - mrhs->m.n[i][j];
+      sqdiff += diff*diff;
+    }
+  }
+
+  bool equal = sqrt(sqdiff) < dmnsn_epsilon;
+
+  PyObject *result;
+  switch (op) {
+  case Py_EQ:
+    result = equal ? Py_True : Py_False;
+    break;
+  case Py_NE:
+    result = !equal ? Py_True : Py_False;
+    break;
+  default:
+    result = Py_NotImplemented;
+    break;
+  }
+
+  Py_INCREF(result);
+  return result;
+}
+
+static PyObject *
+dmnsn_py_Matrix_mul(PyObject *lhs, PyObject *rhs)
+{
+  if (!PyObject_TypeCheck(lhs, &dmnsn_py_MatrixType)) {
+    PyErr_SetString(PyExc_TypeError,
+                    "Left-hand side of matrix multiplication must be a matrix");
+    return NULL;
+  }
+
+  dmnsn_py_Matrix *mlhs = (dmnsn_py_Matrix *)lhs;
+
+  if (PyObject_TypeCheck(rhs, &dmnsn_py_MatrixType)) {
+    dmnsn_py_Matrix *mrhs = (dmnsn_py_Matrix *)rhs;
+    dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+    if (ret) {
+      ret->m = dmnsn_matrix_mul(mlhs->m, mrhs->m);
+    }
+    return (PyObject *)ret;
+  } else if (PyObject_TypeCheck(rhs, &dmnsn_py_VectorType)) {
+    dmnsn_py_Vector *vrhs = (dmnsn_py_Vector *)rhs;
+    dmnsn_py_Vector *ret = PyObject_New(dmnsn_py_Vector, &dmnsn_py_VectorType);
+    if (ret) {
+      ret->v = dmnsn_transform_vector(mlhs->m, vrhs->v);
+    }
+    return (PyObject *)ret;
+  } else {
+    PyErr_SetString(PyExc_TypeError,
+                    "Right-hand side of matrix multiplication must be a matrix"
+                    " or vector");
+    return NULL;
+  }
+}
+
+static PyNumberMethods dmnsn_py_Matrix_as_number = {
+  .nb_multiply    = dmnsn_py_Matrix_mul,
+};
+
+static PyObject *
+dmnsn_py_Matrix_inverse(dmnsn_py_Matrix *self)
+{
+  dmnsn_py_Matrix *ret = PyObject_New(dmnsn_py_Matrix, &dmnsn_py_MatrixType);
+  if (ret) {
+    ret->m = dmnsn_matrix_inverse(self->m);
+  }
+  return (PyObject *)ret;
+}
+
+static PyMethodDef dmnsn_py_Matrix_methods[] = {
+  { "inverse", (PyCFunction)dmnsn_py_Matrix_inverse, METH_NOARGS,
+    "Return the inverse of the matrix" },
+  { NULL }
+};
+
+static PyGetSetDef dmnsn_py_Matrix_getsetters[] = {
+  { NULL }
+};
+
+PyTypeObject dmnsn_py_MatrixType = {
+  PyVarObject_HEAD_INIT(NULL, 0)
+  .tp_name = "dimension.Matrix",
+  .tp_basicsize = sizeof(dmnsn_py_Matrix),
+  .tp_repr = (reprfunc)dmnsn_py_Matrix_repr,
+  .tp_str = (reprfunc)dmnsn_py_Matrix_str,
+  .tp_as_number = &dmnsn_py_Matrix_as_number,
+  .tp_flags = Py_TPFLAGS_DEFAULT,
+  .tp_doc = "Dimension matrix",
+  .tp_richcompare = dmnsn_py_Matrix_richcompare,
+  .tp_methods = dmnsn_py_Matrix_methods,
+  .tp_getset = dmnsn_py_Matrix_getsetters,
+  .tp_init = (initproc)dmnsn_py_Matrix_init,
+};
+
+bool
+dmnsn_py_init_MatrixType(void)
+{
+  dmnsn_py_MatrixType.tp_new = PyType_GenericNew;
+  Py_INCREF(&dmnsn_py_MatrixType);
+  return PyType_Ready(&dmnsn_py_MatrixType) >= 0;
+}