Intro :
Voici l’implémentation d’un cube tout simple par la définition de ses vertices et indices.
Il peut être utilisé pour faire des tests ou pour déboguer vos jeux.
Explications :
Dans le fichier Cube.h :
#ifndef CUBE_MESH_H
#define CUBE_MESH_H
#include <d3d10.h>
#include <d3dx10.h>
#include "Defines.h"
#include "D3D10Renderer.h"
class Cube
{
public:
struct PTNVertex
{
D3DXVECTOR3 position;
D3DXVECTOR2 texture;
D3DXVECTOR3 normal;
PTNVertex()
{
}
PTNVertex(D3DXVECTOR3 p, D3DXVECTOR2 t, D3DXVECTOR3 n)
{
position = p;
texture = t;
normal = n;
}
};
Cube();
virtual ~Cube();
bool Initialize();
void Render(float fTimeSinceLastFrame);
private:
ID3DX10Mesh* m_pMesh;
D3DXMATRIX m_worldMatrix;
D3DXMATRIX m_viewMatrix;
D3DXMATRIX m_projMatrix;
ID3D10EffectMatrixVariable* m_pWorldVariable;
ID3D10EffectMatrixVariable* m_pViewVariable;
ID3D10EffectMatrixVariable* m_pProjVariable;
ID3D10EffectShaderResourceVariable* m_pDiffuseVariable;
ID3D10ShaderResourceView* m_pDiffuseMap;
ID3D10Effect* m_pEffect;
ID3D10EffectTechnique* m_pTechnique;
ID3D10InputLayout* m_pVertexLayout;
};
#endif
Dans le fichier Cube.cpp :
#include "Cube.h"
Cube::Cube() :
m_pMesh(nullptr),
m_pWorldVariable(nullptr),
m_pDiffuseVariable(nullptr),
m_pDiffuseMap(nullptr),
m_pTechnique(nullptr),
m_pEffect(nullptr),
m_pVertexLayout(nullptr)
{
D3DXMatrixIdentity(&m_worldMatrix);
D3DXVECTOR3 Eye(0.0f, 5.0f, -6.0f);
D3DXVECTOR3 At(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 Up(0.0f, 1.0f, 0.0f);
D3DXMatrixLookAtLH(&m_viewMatrix, &Eye, &At, &Up);
D3DXMatrixPerspectiveFovLH(&m_projMatrix, D3DX_PI * 0.25f,
(float) D3D10_RENDERER->GetViewportWidth() / (float)D3D10_RENDERER->GetViewportHeight(),
0.1f, 100.0f);
}
Cube::~Cube()
{
SAFE_RELEASE(m_pMesh);
}
bool Cube::Initialize()
{
PTNVertex v[24];
v[0] = PTNVertex( D3DXVECTOR3( -1.0f, 1.0f, -1.0f ), D3DXVECTOR2( 0.0f, 0.0f ), D3DXVECTOR3( 0.0f, 1.0f, 0.0f ) );
v[1] = PTNVertex( D3DXVECTOR3( 1.0f, 1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 0.0f ), D3DXVECTOR3( 0.0f, 1.0f, 0.0f ) );
v[2] = PTNVertex( D3DXVECTOR3( 1.0f, 1.0f, 1.0f ), D3DXVECTOR2( 1.0f, 1.0f ), D3DXVECTOR3( 0.0f, 1.0f, 0.0f ) );
v[3] = PTNVertex( D3DXVECTOR3( -1.0f, 1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 1.0f ), D3DXVECTOR3( 0.0f, 1.0f, 0.0f ) );
v[4] = PTNVertex( D3DXVECTOR3( -1.0f, -1.0f, -1.0f ), D3DXVECTOR2( 0.0f, 0.0f ), D3DXVECTOR3( 0.0f, -1.0f, 0.0f ) );
v[5] = PTNVertex( D3DXVECTOR3( 1.0f, -1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 0.0f ), D3DXVECTOR3( 0.0f, -1.0f, 0.0f ) );
v[6] = PTNVertex( D3DXVECTOR3( 1.0f, -1.0f, 1.0f ), D3DXVECTOR2( 1.0f, 1.0f ), D3DXVECTOR3( 0.0f, -1.0f, 0.0f ) );
v[7] = PTNVertex( D3DXVECTOR3( -1.0f, -1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 1.0f ), D3DXVECTOR3( 0.0f, -1.0f, 0.0f ));
v[8] = PTNVertex( D3DXVECTOR3( -1.0f, -1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 0.0f ), D3DXVECTOR3( -1.0f, 0.0f, 0.0f ) );
v[9] = PTNVertex( D3DXVECTOR3( -1.0f, -1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 0.0f ), D3DXVECTOR3( -1.0f, 0.0f, 0.0f ) );
v[10] = PTNVertex( D3DXVECTOR3( -1.0f, 1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 1.0f ), D3DXVECTOR3( -1.0f, 0.0f, 0.0f ) );
v[11] = PTNVertex( D3DXVECTOR3( -1.0f, 1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 1.0f ), D3DXVECTOR3( -1.0f, 0.0f, 0.0f ) );
v[12] = PTNVertex( D3DXVECTOR3( 1.0f, -1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 0.0f ), D3DXVECTOR3( 1.0f, 0.0f, 0.0f ) );
v[13] = PTNVertex( D3DXVECTOR3( 1.0f, -1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 0.0f ), D3DXVECTOR3( 1.0f, 0.0f, 0.0f) );
v[14] = PTNVertex( D3DXVECTOR3( 1.0f, 1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 1.0f ), D3DXVECTOR3( 1.0f, 0.0f, 0.0f ) );
v[15] = PTNVertex( D3DXVECTOR3( 1.0f, 1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 1.0f ), D3DXVECTOR3( 1.0f, 0.0f, 0.0f) );
v[16] = PTNVertex( D3DXVECTOR3( -1.0f, -1.0f, -1.0f ), D3DXVECTOR2( 0.0f, 0.0f ), D3DXVECTOR3( 0.0f, 0.0f, -1.0f) );
v[17] = PTNVertex( D3DXVECTOR3( 1.0f, -1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 0.0f ), D3DXVECTOR3( 0.0f, 0.0f, -1.0f) );
v[18] = PTNVertex( D3DXVECTOR3( 1.0f, 1.0f, -1.0f ), D3DXVECTOR2( 1.0f, 1.0f ), D3DXVECTOR3( 0.0f, 0.0f, -1.0f ) );
v[19] = PTNVertex( D3DXVECTOR3( -1.0f, 1.0f, -1.0f ), D3DXVECTOR2( 0.0f, 1.0f ), D3DXVECTOR3( 0.0f, 0.0f, -1.0f ) );
v[20] = PTNVertex( D3DXVECTOR3( -1.0f, -1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 0.0f ), D3DXVECTOR3( 0.0f, 0.0f, 1.0f ) );
v[21] = PTNVertex( D3DXVECTOR3( 1.0f, -1.0f, 1.0f ), D3DXVECTOR2( 1.0f, 0.0f ), D3DXVECTOR3( 0.0f, 0.0f, 1.0f ) );
v[22] = PTNVertex( D3DXVECTOR3( 1.0f, 1.0f, 1.0f ), D3DXVECTOR2( 1.0f, 1.0f ), D3DXVECTOR3( 0.0f, 0.0f, 1.0f) );
v[23] = PTNVertex( D3DXVECTOR3( -1.0f, 1.0f, 1.0f ), D3DXVECTOR2( 0.0f, 1.0f ), D3DXVECTOR3( 0.0f, 0.0f, 1.0f ) );
unsigned int i[36] = { 3,1,0,
2,1,3,
6,4,5,
7,4,6,
11,9,8,
10,9,11,
14,12,13,
15,12,14,
19,17,16,
18,17,19,
22,20,21,
23,20,22
};
D3D10_INPUT_ELEMENT_DESC layout[] =
{
{ "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 },
};
HRESULT hr;
hr = D3DX10CreateMesh(D3D10_RENDERER->GetDevice(), layout, 3, "POSITION", 24, 36/3, D3DX10_MESH_32_BIT, &m_pMesh);
hr = m_pMesh->SetVertexData(0, v);
if (FAILED(hr))
{
ShowMessageBoxDXError(hr);
return false;
}
hr = m_pMesh->SetIndexData(i, 36);
if (FAILED(hr))
{
ShowMessageBoxDXError(hr);
return false;
}
hr = m_pMesh->CommitToDevice();
if (FAILED(hr))
{
ShowMessageBoxDXError(hr);
return false;
}
ID3D10Blob* pBlob = nullptr;
hr = D3DX10CreateEffectFromFile(L"Cube.fx", nullptr, nullptr, "fx_4_0",
D3D10_SHADER_ENABLE_STRICTNESS | D3D10_SHADER_DEBUG, 0,
D3D10_RENDERER->GetDevice(), nullptr, nullptr, &m_pEffect, &pBlob, nullptr);
if (FAILED(hr))
{
if (pBlob)
{
// Affiche l'erreur de compilation du shader
MessageBoxA(nullptr, (PCSTR)pBlob->GetBufferPointer(), "Erreur dans le fichier shader", MB_ICONHAND | MB_OK);
}
else
{
ShowMessageBoxDXError(hr);
}
return false;
}
m_pTechnique = m_pEffect->GetTechniqueByName("Render");
m_pWorldVariable = m_pEffect->GetVariableByName("World")->AsMatrix();
m_pViewVariable = m_pEffect->GetVariableByName("View")->AsMatrix();
m_pProjVariable = m_pEffect->GetVariableByName("Projection")->AsMatrix();
m_pDiffuseVariable = m_pEffect->GetVariableByName("txDiffuse")->AsShaderResource();
D3D10_PASS_DESC PassDesc;
m_pTechnique->GetPassByIndex(0)->GetDesc(&PassDesc);
hr = D3D10_RENDERER->GetDevice()->CreateInputLayout(layout, 3, PassDesc.pIAInputSignature,
PassDesc.IAInputSignatureSize, &m_pVertexLayout);
if (FAILED(hr))
{
ShowMessageBoxDXError(hr);
return false;
}
// On charge la texture
hr = D3DX10CreateShaderResourceViewFromFile(D3D10_RENDERER->GetDevice(), L"box.jpg", nullptr, nullptr, &m_pDiffuseMap, nullptr);
if (FAILED(hr))
{
ShowMessageBoxDXError(hr);
return false;
}
return true;
}
void Cube::Render(float fTimeSinceLastFrame)
{
D3D10_RENDERER->GetDevice()->IASetInputLayout(m_pVertexLayout);
// Pour faire tourner le cube autour de l'axe Y
static float r = 0;
D3DXMatrixRotationY(&m_worldMatrix, r);
r += fTimeSinceLastFrame * 0.6f;
m_pWorldVariable->SetMatrix((float*)&m_worldMatrix);
m_pViewVariable->SetMatrix((float*)&m_viewMatrix);
m_pProjVariable->SetMatrix((float*)&m_projMatrix);
m_pDiffuseVariable->SetResource(m_pDiffuseMap);
D3D10_TECHNIQUE_DESC techDesc;
m_pTechnique->GetDesc(&techDesc);
for(uint32 p = 0; p < techDesc.Passes; p++)
{
m_pTechnique->GetPassByIndex(p)->Apply(0);
m_pMesh->DrawSubset(0);
}
}
Résumé :
Nous avons implémenter le code pour afficher un petit cube.
Voici les fichiers sources : Simple Cube.zip.