source: GTP/trunk/App/Demos/Illum/pathmap/SubMesh.cpp @ 2197

#include "dxstdafx.h"
#include ".\submesh.h"
#include "Mesh.h"
#include "PathMapEffect.h"
#include "TriangleMesh.h"
#include "L.h"

SubMesh::SubMesh(Mesh* parent, int subsetId, D3DXMATERIAL& dMaterial)
{
        this->parent = parent;
        this->subsetId = subsetId;

        rayTraceMesh = NULL;

        bumpTexture = NULL;
        normalTexture = NULL;

        material = dMaterial;
        if(material.pTextureFilename)
        {
                material.pTextureFilename = new char[strlen(dMaterial.pTextureFilename) + 1];
                strcpy(material.pTextureFilename, dMaterial.pTextureFilename);
                //set submesh textures from material and shader properties (combine partition and attribute buffer)
        }

        lambertTexture = parent->pathMapEffect->loadTexture( L::l+dMaterial.pTextureFilename, &rayTraceMaterial);

}

void SubMesh::buildRayTraceMesh(DWORD startIndex, DWORD indexCount)
{
        //lock the buffers and create ray tracing meshes from the data
        LPDIRECT3DVERTEXBUFFER9 vertexBuffer;
        parent->mesh->GetVertexBuffer(&vertexBuffer);
        FlexVertexArray vertexData(parent->mesh->GetNumBytesPerVertex());
        D3DVERTEXELEMENT9 elem[64];     parent->mesh->GetDeclaration(elem);      FlexVertex::setFormat(elem);
        vertexBuffer->Lock(0,parent->mesh->GetNumVertices()*parent->mesh->GetNumBytesPerVertex(),vertexData.getDataPointerReference(),0);
        LPDIRECT3DINDEXBUFFER9 indexBuffer;
        parent->mesh->GetIndexBuffer(&indexBuffer);
        unsigned short* indexData;
        indexBuffer->Lock(startIndex*sizeof(unsigned short),indexCount*sizeof(unsigned short),(void**)&indexData,0);

        //create a TriangleMesh for ray-tracing
        rayTraceMesh = new TriangleMesh(rayTraceMaterial, indexData, indexCount/3,
                vertexData, parent->mesh->GetNumVertices());

        vertexBuffer->Unlock();
        indexBuffer->Unlock();
        vertexBuffer->Release();
        indexBuffer->Release();
}

SubMesh::~SubMesh(void)
{
        if(normalTexture)
                normalTexture->Release();
        if(rayTraceMesh)
                delete rayTraceMesh;
}

void SubMesh::draw()
{
        parent->mesh->DrawSubset(subsetId);
}

void SubMesh::drawToAtlas()
{
        parent->mesh->DrawSubset(subsetId);

        LPDIRECT3DDEVICE9 device = parent->pathMapEffect->device;

        if(edgeCount)
        {
                device->SetStreamSource(0, parent->edgeVertexBuffer, 0, parent->mesh->GetNumBytesPerVertex());
                device->DrawPrimitive(D3DPT_LINELIST, edgeStartIndex * 2, edgeCount);
        }
}

void SubMesh::loadBumpMap(LPCSTR fileName, float bumpScale)
{
        bumpTexture = NULL;
        normalTexture = NULL;

        if(fileName[0] == '\0')
                return;

        LPDIRECT3DDEVICE9 device = parent->pathMapEffect->device;

        bumpTexture = parent->pathMapEffect->loadTexture( L::l+fileName );
        strcpy(bumpFileName, fileName);

        HRESULT hrwft;
        if(bumpTexture)
        {
                D3DSURFACE_DESC bDesc;
                bumpTexture->GetLevelDesc(0, &bDesc);
                hrwft = device->CreateTexture(bDesc.Width, bDesc.Height, 1, bDesc.Usage, D3DFMT_A16B16G16R16F, bDesc.Pool,
                        &normalTexture, NULL);
                hrwft = D3DXComputeNormalMap(
                        normalTexture,
                        bumpTexture,
                        NULL,
                        D3DX_NORMALMAP_COMPUTE_OCCLUSION,
                        D3DX_CHANNEL_RED,
                        bumpScale);
        }
        else
                normalTexture = NULL;

}