学步园

// Create patch
        patchDecl = HardwareBufferManager::getSingleton().createVertexDeclaration();
        patchDecl->addElement(0, 0, VET_FLOAT3, VES_POSITION);
        patchDecl->addElement(0, sizeof(float)*3, VET_FLOAT3, VES_NORMAL);
 patchDecl->addElement(0, sizeof(float)*6, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0);

        // Make a 3x3 patch for test
        patchCtlPoints = (float*)( new PatchVertex[9] );

        // Patch data
        PatchVertex *pVert = (PatchVertex*)patchCtlPoints;

        pVert->x = -500.0; pVert->y = 200.0; pVert->z = -500.0;
        pVert->nx = -0.5; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 0.0; pVert->v = 0.0;
        pVert++;
        pVert->x = 0.0; pVert->y = 500.0; pVert->z = -750.0;
        pVert->nx = 0.0; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 0.5; pVert->v = 0.0;
        pVert++;
        pVert->x = 500.0; pVert->y = 1000.0; pVert->z = -500.0;
        pVert->nx = 0.5; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 1.0; pVert->v = 0.0;
        pVert++;

        pVert->x = -500.0; pVert->y = 0.0; pVert->z = 0.0;
        pVert->nx = -0.5; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 0.0; pVert->v = 0.5;
        pVert++;
        pVert->x = 0.0; pVert->y = 500.0; pVert->z = 0.0;
        pVert->nx = 0.0; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 0.5; pVert->v = 0.5;
        pVert++;
        pVert->x = 500.0; pVert->y = -50.0; pVert->z = 0.0;
        pVert->nx = 0.5; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 1.0; pVert->v = 0.5;
        pVert++;

        pVert->x = -500.0; pVert->y = 0.0; pVert->z = 500.0;
        pVert->nx = -0.5; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 0.0; pVert->v = 1.0;
        pVert++;
        pVert->x = 0.0; pVert->y = 500.0; pVert->z = 500.0;
        pVert->nx = 0.0; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 0.5; pVert->v = 1.0;
        pVert++;
        pVert->x = 500.0; pVert->y = 200.0; pVert->z = 800.0;
        pVert->nx = 0.5; pVert->ny = 0.5; pVert->nz = 0.0;
        pVert->u = 1.0; pVert->v = 1.0;
        pVert++;


        patch = MeshManager::getSingleton().createBezierPatch(
            "Bezier1", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
            patchCtlPoints, patchDecl, 
            3, 3, 5, 5, PatchSurface::VS_BOTH);

        // Start patch at 0 detail
        patch->setSubdivision(0.0f);
        // Create entity based on patch
        Entity* patchEntity = mSceneMgr->createEntity("Entity1", "Bezier1");

        MaterialPtr pMat = MaterialManager::getSingleton().create("TextMat", 
            ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
        pMat->getTechnique(0)->getPass(0)->createTextureUnitState( "BumpyMetal.jpg" );
        patchEntity->setMaterialName("TextMat");
		patchPass = pMat->getTechnique(0)->getPass(0);

        // Attach the entity to the root of the scene
        mSceneMgr->getRootSceneNode()->attachObject(patchEntity);