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Adding a fov attribute to KX_Camera. This attribute converts the field of view value and uses it to set lens.

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This commit is contained in:
Daniel Stokes 2013-08-07 05:24:47 +00:00
parent f5c66a3676
commit 29c8e4512c
3 changed files with 38 additions and 0 deletions
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6
doc/python_api/rst/bge_types/bge.types.KX_Camera.rst
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@ -27,6 +27,12 @@ base class --- :class:`KX_GameObject`
:type: float
.. attribute:: fov
The camera's field of view value.
:type: float
.. attribute:: ortho_scale
The camera's view scale when in orthographic mode.

30
source/gameengine/Ketsji/KX_Camera.cpp
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@ -521,6 +521,7 @@ PyAttributeDef KX_Camera::Attributes[] = {
KX_PYATTRIBUTE_RW_FUNCTION("perspective", KX_Camera, pyattr_get_perspective, pyattr_set_perspective),
KX_PYATTRIBUTE_RW_FUNCTION("lens", KX_Camera, pyattr_get_lens, pyattr_set_lens),
KX_PYATTRIBUTE_RW_FUNCTION("fov", KX_Camera, pyattr_get_fov, pyattr_set_fov),
KX_PYATTRIBUTE_RW_FUNCTION("ortho_scale", KX_Camera, pyattr_get_ortho_scale, pyattr_set_ortho_scale),
KX_PYATTRIBUTE_RW_FUNCTION("near", KX_Camera, pyattr_get_near, pyattr_set_near),
KX_PYATTRIBUTE_RW_FUNCTION("far", KX_Camera, pyattr_get_far, pyattr_set_far),
@ -752,6 +753,35 @@ int KX_Camera::pyattr_set_lens(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef,
return PY_SET_ATTR_SUCCESS;
}
PyObject *KX_Camera::pyattr_get_fov(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
{
KX_Camera* self = static_cast<KX_Camera*>(self_v);
float lens = self->m_camdata.m_lens;
float width = self->m_camdata.m_sensor_x;
float fov = 2.0 * atan(0.5 * width / lens);
return PyFloat_FromDouble(fov * MT_DEGS_PER_RAD);
}
int KX_Camera::pyattr_set_fov(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value)
{
KX_Camera* self = static_cast<KX_Camera*>(self_v);
float fov = PyFloat_AsDouble(value);
if (fov <= 0.0) {
PyErr_SetString(PyExc_AttributeError, "camera.fov = float: KX_Camera, expected a float greater then zero");
return PY_SET_ATTR_FAIL;
}
fov *= MT_RADS_PER_DEG;
float width = self->m_camdata.m_sensor_x;
float lens = width / (2.0 * tan(0.5 * fov));
self->m_camdata.m_lens= lens;
self->m_set_projection_matrix = false;
return PY_SET_ATTR_SUCCESS;
}
PyObject *KX_Camera::pyattr_get_ortho_scale(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
{
KX_Camera* self = static_cast<KX_Camera*>(self_v);

2
source/gameengine/Ketsji/KX_Camera.h
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@ -298,6 +298,8 @@ public:
static PyObject* pyattr_get_lens(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef);
static int pyattr_set_lens(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value);
static PyObject* pyattr_get_fov(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef);
static int pyattr_set_fov(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value);
static PyObject* pyattr_get_ortho_scale(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef);
static int pyattr_set_ortho_scale(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value);
static PyObject* pyattr_get_near(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef);