Missing a nice main.cpp example?

[taiya]

No description provided.

[CedricGuillemet]

I'm working on it :)

[PicosePablo]

Yes, and can u make better comments? There are functions without any help (ex: SetRect). Im not sure about how to use this....

[w1th0utnam3]

I would really appreciate a small example that works on its own. I currently cannot get ImGuizmo to draw anything and I'm not sure whether it is because of the view/projection matrices or because I call the functions in the wrong order.
At the moment I call

ImGuizmo::BeginFrame();
ImGuizmo::Enable(true);

ImGuiIO& io = ImGui::GetIO();
ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);

glm::fmat4 view = m_camera->modelViewMatrix();
glm::fmat4 projection = m_camera->projectionMatrix();

ImGuizmo::DrawCube(&view[0][0], &projection[0][0], &matrix[0][0]);
ImGuizmo::Manipulate(&view[0][0], &projection[0][0], ImGuizmo::ROTATE, ImGuizmo::WORLD, &matrix[0][0]);

right after ImGuiGlfw3NewFrame() in the render loop but nothing is drawn. The matrix variable is initialized to the identity matrix and I tried to supply my real view and projection matrices as well as identity matrices. Standard ImGui windows are drawn correctly btw. Do you have any advice?

[CedricGuillemet]

Hi Fabian, Can you dump the view & projection matrices? I don't see anything strange in your code. best Cedric

…

On Fri, May 26, 2017 at 3:22 AM, Fabian Löschner ***@***.***> wrote: I would really appreciate a small example that works on its own. I currently cannot get ImGuizmo to draw anything and I'm not sure whether it is because of the view/projection matrices or because I call the functions in the wrong order. At the moment I call ImGuizmo::BeginFrame(); ImGuizmo::Enable(true); ImGuiIO& io = ImGui::GetIO(); ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y); glm::fmat4 view = m_camera->modelViewMatrix(); glm::fmat4 projection = m_camera->projectionMatrix(); ImGuizmo::DrawCube(&view[0][0], &projection[0][0], &matrix[0][0]); ImGuizmo::Manipulate(&view[0][0], &projection[0][0], ImGuizmo::ROTATE, ImGuizmo::WORLD, &matrix[0][0]); right after ImGuiGlfw3NewFrame() in the render loop but nothing is drawn. The matrix variable is initialized to the identity matrix and I tried to supply my real view and projection matrices as well as identity matrices. Standard ImGui windows are drawn correctly btw. Do you have any advice? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#21 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABQIyO09-lHm4NJOTvhnEufN2eoCbognks5r9qfYgaJpZM4LdUI6> .

-- Cedric Guillemet http://www.skaven.fr http://twitter.com/skaven_

[w1th0utnam3]

Thanks for the reply, I use the following code to compute the matrices:

void Camera::updateModelViewMatrix()
{
	m_modelView = glm::scale(glm::dmat4(), m_scaling);
	m_modelView = glm::rotate(m_modelView, glm::angle(m_rotation), glm::axis(m_rotation));
}

void Camera::updateProjectionMatrix()
{	
	const double diag = std::hypot(m_viewportSize.x, m_viewportSize.y);
	m_projection = glm::ortho<double>(-0.5*m_viewportSize.x*m_zoom, 0.5*m_viewportSize.x*m_zoom, -0.5*m_viewportSize.y*m_zoom, 0.5*m_viewportSize.y*m_zoom, -diag, diag);
}

[edselmalasig]

please add a main.cpp

[edselmalasig]

added mine with object picker http://www.github.com/edselmalasig/ImGuizmo_pick_and_choose

[w1th0utnam3]

@CedricGuillemet, I found the problem why nothing was drawn: In my call

ImGuizmo::Manipulate(&view[0][0], &projection[0][0], ImGuizmo::ROTATE, ImGuizmo::WORLD, &matrix[0][0]);

I forgot to initialize matrix to anything meaningful (e.g. identity matrix). facepalm