Method _updateBaseTexture

Engine/source/terrain/terrRender.cpp:324–491

}

void TerrainBlock::_updateBaseTexture(bool writeToCache)
{
   if ( !mBaseShader && !_initBaseShader() )
      return;

   // This can sometimes occur outside a begin/end scene.
   const bool sceneBegun = GFX->canCurrentlyRender();
   if ( !sceneBegun )
      GFX->beginScene();

   GFXDEBUGEVENT_SCOPE( TerrainBlock_UpdateBaseTexture, ColorI::GREEN );

   PROFILE_SCOPE( TerrainBlock_UpdateBaseTexture );

   GFXTransformSaver saver;

   const U32 maxTextureSize = GFX->getCardProfiler()->queryProfile( "maxTextureSize", 1024 );

   U32 baseTexSize = getNextPow2( mBaseTexSize );
   baseTexSize = getMin( maxTextureSize, baseTexSize );
   Point2I destSize( baseTexSize, baseTexSize );

   // Setup geometry
   GFXVertexBufferHandle<GFXVertexPT> vb;
   {
      F32 copyOffsetX = 2.0f * GFX->getFillConventionOffset() / (F32)destSize.x;
      F32 copyOffsetY = 2.0f * GFX->getFillConventionOffset() / (F32)destSize.y;

      GFXVertexPT points[4];
      points[0].point = Point3F(1.0 - copyOffsetX, -1.0 + copyOffsetY, 0.0);
      points[0].texCoord = Point2F(1.0, 1.0f);
      points[1].point = Point3F(1.0 - copyOffsetX, 1.0 + copyOffsetY, 0.0);
      points[1].texCoord = Point2F(1.0, 0.0f);
      points[2].point = Point3F(-1.0 - copyOffsetX, -1.0 + copyOffsetY, 0.0);
      points[2].texCoord = Point2F(0.0, 1.0f);
      points[3].point = Point3F(-1.0 - copyOffsetX, 1.0 + copyOffsetY, 0.0);
      points[3].texCoord = Point2F(0.0, 0.0f);

      vb.set( GFX, 4, GFXBufferTypeVolatile );
      GFXVertexPT *ptr = vb.lock();
      if(ptr)
      {
         dMemcpy( ptr, points, sizeof(GFXVertexPT) * 4 );
         vb.unlock();
      }
   }

   GFXTexHandle blendTex;

   // If the base texture is already a valid render target then 
   // use it to render to else we create one.
   if (  mBaseTex.isValid() && 
         mBaseTex->isRenderTarget() &&
         mBaseTex->getFormat() == GFXFormatR8G8B8A8_SRGB &&
         mBaseTex->getWidth() == destSize.x &&
         mBaseTex->getHeight() == destSize.y )
      blendTex = mBaseTex;
   else