Intro :

Dans nos programmes de rendu 3D nous avons besoin d’utiliser différents types de configurations de vertex.

Prérequis :

– Savoir utiliser les Vertex Input Layouts. Voir cet article.

Explications :

Les voici :

struct PTNVertex
{
    D3DXVECTOR3 position;
    D3DXVECTOR2 texture;
    D3DXVECTOR3 normal;
};

struct PTVertex
{
    D3DXVECTOR3 pos;
    D3DXVECTOR2 texture;
};

struct PNVertex
{
    D3DXVECTOR3 pos;
    D3DXVECTOR3 normal;
};

struct PCVertex
{
    D3DXVECTOR3 position;
    D3DXCOLOR color;
};

struct PTCVertex
{
    D3DXVECTOR3 pos;
    D3DXVECTOR2 texture;
    D3DXCOLOR color;
};

struct PTNTBVertex
{
    D3DXVECTOR3 position;
    D3DXVECTOR2 texture;
    D3DXVECTOR3 normal;
    D3DXVECTOR3 tangent;
    D3DXVECTOR3 binormal;
};

static D3D10_INPUT_ELEMENT_DESC layoutPTN[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 20, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

static D3D10_INPUT_ELEMENT_DESC layoutPN[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

static D3D10_INPUT_ELEMENT_DESC layoutPC[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

static D3D10_INPUT_ELEMENT_DESC layoutPTNTB[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 20, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TANGENT", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 32, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "BINORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 44, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

static D3D10_INPUT_ELEMENT_DESC layoutWater[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TEXCOORD", 1, DXGI_FORMAT_R32G32_FLOAT, 0, 20, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

static D3D10_INPUT_ELEMENT_DESC layoutPT[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

static D3D10_INPUT_ELEMENT_DESC layoutPTC[] =
{
    { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
    { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 20, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};

enum VertexLayoutType
{
    PTN_VERTEX, // Position, texture, normal
    PT_VERTEX,
    PN_VERTEX,  // Position, normal
    PC_VERTEX, // Position, couleur
    PTC_VERTEX,
    PTNTB_VERTEX // Position, texture, normal, bitangente et binormale
};

Résumé :

Nous avons présenté différents types de configurations de vertex dont vous pouvez vous inspirer.