working out the center of the screen

Anddos · 2013-11-09T08:28:41

how do i work out the center of the screen so i can space those cordinates for the vertexbuffer,etc these values so this button will be center of the screen and how would i give some control to this button such as mouse clicking on it,thanks if you can help... the below code is for directx 9 // create the vertices using the CUSTOMVERTEX struct CUSTOMVERTEX vertices[] = { //Triangle 1 { 150.0f, 400.5f, -5.5f, //xyz screenspace 0, 1, //textures coords 1.0f }, //rhw // D3DCOLOR_XRGB(0, 0, 255), }, //diffuse blue { 325.0f, 500.0f, -5.5f, //xyz screenspace 1, 1, //textures coords 1.0f }, //rhw //D3DCOLOR_XRGB(0, 255, 0), }, //diffuse green { 150.0f, 500.0f, -5.5f, //xyz screenspace 1, 0, //textures coords 1.0f }, //rhw //D3DCOLOR_XRGB(255, 0, 0), }, //diffuse red //Triangle 2 { 325.0f, 500.0f, -5.5f, //xyz screenspace 1, 0, //textures coords 1.0f }, //rhw //D3DCOLOR_XRGB(0, 255, 0), }, //diffuse green { 150.0f, 400.5f, -5.5f, //xyz screenspace 0, 0, //textures coords 1.0f }, //rhw //D3DCOLOR_XRGB(0, 0, 255), }, //diffuse blue { 325.0f, 400.5f, -5.5f, //xyz screenspace 0, 1, //textures coords 1.0f }, //rhw //D3DCOLOR_XRGB(255, 0, 0), }, //diffuse red };