From 1bf306d4d93cc21c220a3f31835023e49e84dd2d Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Sun, 22 May 2011 14:22:07 -0600 Subject: Add cameras, objects, and spheres to Python module. --- libdimension-python/PerspectiveCamera.c | 111 ++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 libdimension-python/PerspectiveCamera.c (limited to 'libdimension-python/PerspectiveCamera.c') diff --git a/libdimension-python/PerspectiveCamera.c b/libdimension-python/PerspectiveCamera.c new file mode 100644 index 0000000..f144498 --- /dev/null +++ b/libdimension-python/PerspectiveCamera.c @@ -0,0 +1,111 @@ +/************************************************************************* + * Copyright (C) 2009-2011 Tavian Barnes * + * * + * 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 * + * . * + *************************************************************************/ + +#include "dimension-python.h" + +static int +dmnsn_py_PerspectiveCamera_init(dmnsn_py_PerspectiveCamera *self, + PyObject *args, PyObject *kwds) +{ + if (dmnsn_py_CameraType.tp_init((PyObject *)self, NULL, NULL) < 0) + return -1; + + static char *kwlist[] = { "location", "look_at", NULL }; + + dmnsn_vector location, look_at; + if (!PyArg_ParseTupleAndKeywords(args, kwds, "O&O&", kwlist, + &dmnsn_py_VectorParse, &location, + &dmnsn_py_VectorParse, &look_at)) + return -1; + + self->location = location; + self->look_at = look_at; + + dmnsn_delete_camera(self->base.camera); + self->base.camera = dmnsn_new_perspective_camera(); + DMNSN_INCREF(self->base.camera); + return 0; +} + +static PyObject * +dmnsn_py_PerspectiveCamera_initialize(dmnsn_py_PerspectiveCamera *self) +{ + dmnsn_vector look_at = dmnsn_vector_sub(self->look_at, self->location); + + /* Align the camera with the look_at point */ + + dmnsn_vector right = dmnsn_x; + dmnsn_vector up = dmnsn_y; + dmnsn_vector forward = dmnsn_z; + + dmnsn_vector theta = dmnsn_vector_mul( + dmnsn_vector_axis_angle(forward, look_at, up), + up + ); + dmnsn_matrix align = dmnsn_rotation_matrix(theta); + + right = dmnsn_transform_vector(align, right); + forward = dmnsn_transform_vector(align, forward); + + theta = dmnsn_vector_mul( + dmnsn_vector_axis_angle(forward, look_at, right), + right + ); + align = dmnsn_matrix_mul(dmnsn_rotation_matrix(theta), align); + + /* Translate the camera to the location */ + dmnsn_matrix move = dmnsn_translation_matrix(self->location); + + dmnsn_matrix trans = dmnsn_matrix_mul(move, align); + self->base.camera->trans = dmnsn_matrix_mul(self->base.camera->trans, + trans); + + Py_INCREF(Py_None); + return Py_None; +} + +static PyMethodDef dmnsn_py_PerspectiveCamera_methods[] = { + { "initialize", (PyCFunction)dmnsn_py_PerspectiveCamera_initialize, + METH_NOARGS, "Initialize a perspective camera" }, + { NULL } +}; + +static PyGetSetDef dmnsn_py_PerspectiveCamera_getsetters[] = { + { NULL } +}; + +PyTypeObject dmnsn_py_PerspectiveCameraType = { + PyVarObject_HEAD_INIT(NULL, 0) + .tp_name = "dimension.PerspectiveCamera", + .tp_basicsize = sizeof(dmnsn_py_PerspectiveCamera), + .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, + .tp_doc = "Dimension perspective camera", + .tp_methods = dmnsn_py_PerspectiveCamera_methods, + .tp_getset = dmnsn_py_PerspectiveCamera_getsetters, + .tp_init = (initproc)dmnsn_py_PerspectiveCamera_init, + .tp_base = &dmnsn_py_CameraType, +}; + +bool +dmnsn_py_init_PerspectiveCameraType(void) +{ + dmnsn_py_PerspectiveCameraType.tp_new = PyType_GenericNew; + return PyType_Ready(&dmnsn_py_PerspectiveCameraType) >= 0; +} -- cgit v1.2.3