C# WorldToScreen

**bryanunited** · 07-31-2014

Hey guys, feel stupid for having to ask here but I've searched around and can't find a straightforward solution.

I'm using SharpDX to do some D3D drawing and have my camera struct working, from that point I thought it would be straightforward but my text isn't being rendered on screen.

Have tried using transforms like:

Code:

Device.SetTransform(TransformState.World, Matrix.Translation(player.X, player.Y, player.Z));

How can I generate screen coordinates from a world object location if I already have the camera position, matrix, fov etc.

**Master674** · 07-31-2014

Multiply the world-view-projection matrix with the world position and you have the screen position in range -1 to 1.

**andy012345** · 07-31-2014

Super tired, here's some C++ relevant (I hope) code, ignore formatting I'm just pulling part of the code.

Code:

        D3DXVECTOR3 pos;        D3DXVECTOR3 screen;

        D3DVIEWPORT9 viewport;
        device->GetViewport(&viewport);


        D3DXMATRIX world, projection, view;
        device->GetTransform(D3DTS_WORLD, &world);
        device->GetTransform(D3DTS_PROJECTION, &projection);
        device->GetTransform(D3DTS_VIEW, &view);


        D3DXVec3Project(&screen, &pos, &viewport, &projection, &view, &world);


        if (screen.z >= 1.0f) //probably shouldn't show this stuff, it's generally stuff not visible (example in first person, stuff that is behind you)
            return;