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authorTavian Barnes <tavianator@gmail.com>2011-05-22 14:22:07 -0600
committerTavian Barnes <tavianator@gmail.com>2011-05-22 14:22:07 -0600
commit1bf306d4d93cc21c220a3f31835023e49e84dd2d (patch)
tree436959a8321100a3c36e8eef9a19279cb446e1fa /libdimension-python/PerspectiveCamera.c
parent0f0b704144bddc045657f7ed852b49d5e349b0bd (diff)
downloaddimension-1bf306d4d93cc21c220a3f31835023e49e84dd2d.tar.xz
Add cameras, objects, and spheres to Python module.
Diffstat (limited to 'libdimension-python/PerspectiveCamera.c')
-rw-r--r--libdimension-python/PerspectiveCamera.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/libdimension-python/PerspectiveCamera.c b/libdimension-python/PerspectiveCamera.c
new file mode 100644
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--- /dev/null
+++ b/libdimension-python/PerspectiveCamera.c
@@ -0,0 +1,111 @@
+/*************************************************************************
+ * 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 "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;
+}