bool Camera::update()
{
if (!m_bNeedsUpdate)
{
return true;
}
// update view and projection matrices
Matrix44 tmp;
//m_view.fromLookAtLH(m_position, m_lookAt, m_upVector);
m_orientation.toRotationMatrix(tmp);
tmp.m[3][0] = m_position.x;
tmp.m[3][1] = m_position.y;
tmp.m[3][2] = m_position.z;
tmp.invert(m_view);
if (m_bOrtho)
m_proj.makeOrthoProjectionLH(m_width, m_height, m_nearClip, m_farClip);
else
m_proj.makePerspectiveProjectionLH(m_nearClip, m_farClip, m_fovY, m_aspect);
// update frustum planes
updateFrustum();
// cache viewproj
mul(m_viewproj, m_view, m_proj);
m_bNeedsUpdate = false;
return true;
}
bool
RendererServices::get_inverse_matrix (Matrix44 &result, ustring to)
{
bool ok = get_matrix (result, to);
if (ok)
result.invert ();
return ok;
}
bool
RendererServices::get_inverse_matrix (Matrix44 &result, TransformationPtr xform)
{
bool ok = get_matrix (result, xform);
if (ok)
result.invert ();
return ok;
}
bool
RendererServices::get_inverse_matrix (ShaderGlobals *sg, Matrix44 &result,
TransformationPtr xform, float time)
{
bool ok = get_matrix (sg, result, xform, time);
if (ok)
result.invert ();
return ok;
}
bool
RendererServices::get_inverse_matrix (ShaderGlobals *sg, Matrix44 &result,
ustring to)
{
bool ok = get_matrix (sg, result, to);
if (ok)
result.invert ();
return ok;
}
bool
SimpleRenderer::get_inverse_matrix (ShaderGlobals *sg, Matrix44 &result,
ustring to, float time)
{
if (to == u_camera || to == u_screen || to == u_NDC || to == u_raster) {
Matrix44 M = m_world_to_camera;
if (to == u_screen || to == u_NDC || to == u_raster) {
float depthrange = (double)m_yon-(double)m_hither;
if (m_projection == u_perspective) {
float tanhalffov = tanf (0.5f * m_fov * M_PI/180.0);
Matrix44 camera_to_screen (1/tanhalffov, 0, 0, 0,
0, 1/tanhalffov, 0, 0,
0, 0, m_yon/depthrange, 1,
0, 0, -m_yon*m_hither/depthrange, 0);
M = M * camera_to_screen;
} else {
Matrix44 camera_to_screen (1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1/depthrange, 0,
0, 0, -m_hither/depthrange, 1);
M = M * camera_to_screen;
}
if (to == u_NDC || to == u_raster) {
float screenleft = -1.0, screenwidth = 2.0;
float screenbottom = -1.0, screenheight = 2.0;
Matrix44 screen_to_ndc (1/screenwidth, 0, 0, 0,
0, 1/screenheight, 0, 0,
0, 0, 1, 0,
-screenleft/screenwidth, -screenbottom/screenheight, 0, 1);
M = M * screen_to_ndc;
if (to == u_raster) {
Matrix44 ndc_to_raster (m_xres, 0, 0, 0,
0, m_yres, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
M = M * ndc_to_raster;
}
}
}
result = M;
return true;
}
TransformMap::const_iterator found = m_named_xforms.find (to);
if (found != m_named_xforms.end()) {
result = *(found->second);
result.invert();
return true;
} else {
return false;
}
}
Matrix44 SimpleSceneGraph::calculateRelativeTransform(const Matrix44& absoluteTransform) const
{
if (parent == nullptr)
{
return absoluteTransform;
}
/*
* Find the transform for this graph (Gr) relative to the absolute parent transform (Pa) that matches the
* absolute transform (Ga) i.e. such that: Ga = Pa * Gr or Gr = Ga * Pa-1
*/
Matrix44 inverseParentAbsoluteTransform = parent->getAbsoluteTransform();
inverseParentAbsoluteTransform.invert();
return absoluteTransform * inverseParentAbsoluteTransform;
}
bool
SimpleRenderer::get_inverse_matrix (Matrix44 &result, ustring to, float time)
{
if (to == u_camera || to == u_screen || to == u_NDC || to == u_raster) {
Matrix44 M = m_world_to_camera;
if (to == u_screen || to == u_NDC || to == u_raster) {
// arbitrary clip planes because renderer doesn't do any clipping
float yon = 0.01f;
float hither = 1e5f;
float depthrange = yon - hither;
float tanhalffov = tanf (m_fov * float(M_PI/360.0));
Matrix44 camera_to_screen (1/tanhalffov, 0, 0, 0,
0, 1/tanhalffov, 0, 0,
0, 0, yon/depthrange, 1,
0, 0, -yon*hither/depthrange, 0);
M = M * camera_to_screen;
if (to == u_NDC || to == u_raster) {
Matrix44 screen_to_ndc (0.5f, 0, 0, 0,
0, 0.5f, 0, 0,
0, 0, 1.0f, 0,
-0.5f, -0.5f, 0, 1);
M = M * screen_to_ndc;
if (to == u_raster) {
Matrix44 ndc_to_raster (m_xres, 0, 0, 0,
0, m_yres, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
M = M * ndc_to_raster;
}
}
}
result = M;
return true;
}
TransformMap::const_iterator found = m_named_xforms.find (to);
if (found == m_named_xforms.end())
return false;
result = found->second;
result.invert();
return true;
}
