raTesselatinObject.cpp

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#include "..\include\raMain.h"

namespace System
{
    raTesselatinObject::raTesselatinObject(raDirectX *dx) : raEntity(dx,
        new raProceduralMaterial(dx, 64, "raEffects\\Terrain.fx", "Terrain"))
    {
        m_nVertices = 1;
        m_TesselationsFactor = 10;
    }
    void raTesselatinObject::SetupVertices()
    {
        m_pVertices = new VERTEXPOSITION[m_nVertices];

        m_pVertices[0].position.x = 0.0f;
        m_pVertices[0].position.y = 0.0f;
        m_pVertices[0].position.z = 0.0f;
    }
    void raTesselatinObject::SetupEffectVariables(const raMatrix& pView, const raMatrix& pProj,
                                          const raLight* pLight)
    {
        raEntity::SetupEffectVariables(pView, pProj, pLight);

        ID3DX11Effect * pEffect = GetMaterial(0)->GetEffect();

        ID3DX11EffectScalarVariable* pTeFactor = pEffect->GetVariableByName("g_fTessellationFactor")->AsScalar();

        if(pTeFactor)
            pTeFactor->SetFloat(m_TesselationsFactor);
    }
    bool raTesselatinObject::RenderMesh(LPCSTR techniqueName)
    {
        m_dx->GetImmediateContext()->IASetInputLayout(m_pVertexLayout);
        m_dx->GetImmediateContext()->IASetPrimitiveTopology(
            D3D11_PRIMITIVE_TOPOLOGY_1_CONTROL_POINT_PATCHLIST);

        UINT Strides[1];
        UINT Offsets[1];

        Strides[0] = GetStrideSize();
        Offsets[0] = 0;

        m_dx->GetImmediateContext()->IASetVertexBuffers(0, 1, &m_pVB, Strides, Offsets);

        m_pMaterials[0]->Setup();

        ID3DX11EffectTechnique* pTechnique = m_pMaterials[0]->GetEffectTechnique();

        if(pTechnique)
        {
            D3DX11_TECHNIQUE_DESC techDesc;
            pTechnique->GetDesc(&techDesc);

            for(UINT p = 0; p < techDesc.Passes; ++p)
            {
                pTechnique->GetPassByIndex(p)->Apply(0, m_dx->GetImmediateContext());
                m_dx->GetImmediateContext()->Draw(m_nVertices, 0);
            }
        }
        return true;
    }
};