1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
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;
}
|
