I am trying to Rotate a textured quad in directX however I think i am missing something. I am pretty sure it is because i am applying transformations to the WorldMatrix instead of the ObjectWorld, however i do not have an object world matrix so i am unsure how i would get that since i am not storing much except the texture and the position of 4 vertices directly to the buffer and only updated when it is needed.

here is what i have tried

bool GraphicsClass::Render(float deltatime)
D3DXMATRIX worldMatrix, viewMatrix, projectionMatrix, orthoMatrix, rotationZ;
bool result;

// Clear the buffers to begin the scene.
m_D3D->BeginScene(0.0f, 0.0f, 0.0f, 0.0f);

// Generate the view matrix based on the camera's position.
// Get the world, view, projection, and ortho matrices from the camera and d3d objects.
//Transform World Matrix with a rotation matrix
D3DXMatrixRotationZ(&rotationZ, 90.0f);
D3DXMatrixMultiply(&worldMatrix, &worldMatrix, &rotationZ);
// Turn off the Z buffer to begin all 2D rendering.
// Put the bitmap vertex and index buffers on the graphics pipeline to prepare them for drawing.
result = m_Bitmap->Render(m_D3D->GetDeviceContext(), 124, 124);
    return false;

// Render the bitmap with the texture shader.
result = m_TextureShader->Render(m_D3D->GetDeviceContext(), m_Bitmap->GetIndexCount(), worldMatrix, viewMatrix, orthoMatrix, m_Bitmap->GetTexture());
    return false;

// Turn the Z buffer back on now that all 2D rendering has completed.

// Present the rendered scene to the screen.

return true;

the full code can actually be downloaded from http://www.rastertek.com/dx11tut05.html with the minor difference that render takes in delta-time since last frame using a custom timer class which is not provided by them as well as a few minor tweaks but it is mostly the same.

i did find this http://www.rastertek.com/dx11tut25.html which i may try to implement however that is not really what i want, i want to rotate the actual quad, not the texture.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.