Method clearBuffers

Engine/source/renderInstance/renderPrePassMgr.cpp:1111–1151

}

void RenderPrePassMgr::clearBuffers()
{
   // Clear z-buffer.
   GFX->clear( GFXClearTarget | GFXClearZBuffer | GFXClearStencil, ColorI::ZERO, 1.0f, 0);

   if ( !mClearGBufferShader )
      return;

   GFXTransformSaver saver;

   // Clear the g-buffer.
   RectI box(-1, -1, 3, 3);
   GFX->setWorldMatrix( MatrixF::Identity );
   GFX->setViewMatrix( MatrixF::Identity );
   GFX->setProjectionMatrix( MatrixF::Identity );

   GFX->setShader(mClearGBufferShader);
   GFX->setStateBlock(mStateblock);

   Point2F nw(-0.5,-0.5);
   Point2F ne(0.5,-0.5);

   GFXVertexBufferHandle<GFXVertexPC> verts(GFX, 4, GFXBufferTypeVolatile);
   verts.lock();

   F32 ulOffset = 0.5f - GFX->getFillConventionOffset();
   
   Point2F upperLeft(-1.0, -1.0);
   Point2F lowerRight(1.0, 1.0);

   verts[0].point.set( upperLeft.x+nw.x+ulOffset, upperLeft.y+nw.y+ulOffset, 0.0f );
   verts[1].point.set( lowerRight.x+ne.x, upperLeft.y+ne.y+ulOffset, 0.0f );
   verts[2].point.set( upperLeft.x-ne.x+ulOffset, lowerRight.y-ne.y, 0.0f );
   verts[3].point.set( lowerRight.x-nw.x, lowerRight.y-nw.y, 0.0f );

   verts.unlock();

   GFX->setVertexBuffer( verts );
   GFX->drawPrimitive( GFXTriangleStrip, 0, 2 );
   GFX->setShader(NULL);
}