Method OnPreRender

tools/assimp_view/Background.cpp:224–304

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}
//-------------------------------------------------------------------------------
void CBackgroundPainter::OnPreRender() {
    if (SIMPLE_COLOR != eMode) {
        // clear the z-buffer only (in wireframe mode we must also clear
        // the color buffer )
        if (g_sOptions.eDrawMode == RenderOptions::WIREFRAME) {
            g_piDevice->Clear(0, nullptr, D3DCLEAR_ZBUFFER | D3DCLEAR_TARGET,
                    D3DCOLOR_ARGB(0xff, 100, 100, 100), 1.0f, 0);
        } else {
            g_piDevice->Clear(0, nullptr, D3DCLEAR_ZBUFFER, 0, 1.0f, 0);
        }

        if (TEXTURE_2D == eMode) {
            RECT sRect;
            GetWindowRect(GetDlgItem(g_hDlg, IDC_RT), &sRect);
            sRect.right -= sRect.left;
            sRect.bottom -= sRect.top;

            struct SVertex {
                float x, y, z, w, u, v;
            };

            UINT dw;
            this->piSkyBoxEffect->Begin(&dw, 0);
            this->piSkyBoxEffect->BeginPass(0);

            SVertex as[4];
            as[1].x = 0.0f;
            as[1].y = 0.0f;
            as[1].z = 0.2f;
            as[1].w = 1.0f;
            as[1].u = 0.0f;
            as[1].v = 0.0f;

            as[3].x = (float)sRect.right;
            as[3].y = 0.0f;
            as[3].z = 0.2f;
            as[3].w = 1.0f;
            as[3].u = 1.0f;
            as[3].v = 0.0f;

            as[0].x = 0.0f;
            as[0].y = (float)sRect.bottom;
            as[0].z = 0.2f;
            as[0].w = 1.0f;
            as[0].u = 0.0f;
            as[0].v = 1.0f;

            as[2].x = (float)sRect.right;
            as[2].y = (float)sRect.bottom;
            as[2].z = 0.2f;
            as[2].w = 1.0f;
            as[2].u = 1.0f;
            as[2].v = 1.0f;

            as[0].x -= 0.5f;
            as[1].x -= 0.5f;
            as[2].x -= 0.5f;
            as[3].x -= 0.5f;