bool RenderTarget::_readyDrawCalls()
{
mTriangleCount = 0;
mBatchCount = 0;
mSavedByBatching = 0;
// If theres no camera, nothing to render
if (!mCamera) return false;
// Get the cameras parent, if its not attached to anything, theres nothing to render
SceneNode* camParent = mCamera->getParent();
if (!camParent) return false;
// Find the highest node in the hierarchy
SceneNode* rootNode = camParent->getRootNode();
if (!rootNode) return false;
Main::getRenderSystem().clear(glm::vec4(0.1,0.1,0.1, 1), GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
mCachedRenderableList.clear();
rootNode->_getRenderables(mCachedRenderableList, mCamera, true);
mCachedDrawCallList.clear();
for (auto iter : mCachedRenderableList)
iter->_extractDrawCalls(mCachedDrawCallList, *mCamera);
std::sort(mCachedDrawCallList.begin(), mCachedDrawCallList.end(),
[](const Renderable::DrawCall& first, const Renderable::DrawCall& second)
{
return first.sortKey.key < second.sortKey.key;
});
// Update the render system with the camera data
glm::mat4 camMatrix = mCamera->getParent()->getGlobalTransform();
glm::mat4 viewMatrix = glm::inverse(camMatrix);
ngRenderSys.setCameraMatrices(mCamera->getProjMatrix(), viewMatrix, camMatrix);
return true;
}
