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hacking on DrawTask perf

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This commit is contained in:
ZappoMan 2015-06-05 13:10:51 -07:00
parent 7dc0e8a66c
commit 08ea3368d7
1 changed files with 92 additions and 28 deletions
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120
libraries/render/src/render/DrawTask.cpp
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@ -9,6 +9,11 @@
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
#include <algorithm>
#include <assert.h>
#include <QMap>
#include "DrawTask.h"
#include <PerfStat.h>
@ -19,9 +24,6 @@
#include "ViewFrustum.h"
#include "RenderArgs.h"
#include <algorithm>
#include <assert.h>
using namespace render;
DrawSceneTask::DrawSceneTask() : Task() {
@ -70,7 +72,12 @@ void render::cullItems(const SceneContextPointer& sceneContext, const RenderCont
// Culling / LOD
for (auto id : inItems) {
auto item = scene->getItem(id);
auto bound = item.getBound();
AABox bound;
{
PerformanceTimer perfTimer("getBound");
bound = item.getBound();
}
if (bound.isNull()) {
outItems.push_back(id); // One more Item to render
@ -79,9 +86,17 @@ void render::cullItems(const SceneContextPointer& sceneContext, const RenderCont
// TODO: some entity types (like lights) might want to be rendered even
// when they are outside of the view frustum...
bool outOfView = args->_viewFrustum->boxInFrustum(bound) == ViewFrustum::OUTSIDE;
bool outOfView;
{
PerformanceTimer perfTimer("boxInFrustum");
outOfView = args->_viewFrustum->boxInFrustum(bound) == ViewFrustum::OUTSIDE;
}
if (!outOfView) {
bool bigEnoughToRender = (args->_shouldRender) ? args->_shouldRender(args, bound) : true;
bool bigEnoughToRender;
{
PerformanceTimer perfTimer("shouldRender");
bigEnoughToRender = (args->_shouldRender) ? args->_shouldRender(args, bound) : true;
}
if (bigEnoughToRender) {
outItems.push_back(id); // One more Item to render
} else {
@ -123,36 +138,85 @@ void render::depthSortItems(const SceneContextPointer& sceneContext, const Rende
auto& scene = sceneContext->_scene;
RenderArgs* args = renderContext->args;
// Allocate and simply copy
outItems.reserve(inItems.size());
// Make a local dataset of the center distance and closest point distance
std::vector<ItemBound> itemBounds;
itemBounds.reserve(outItems.size());
for (auto id : inItems) {
auto item = scene->getItem(id);
auto bound = item.getBound();
float distance = args->_viewFrustum->distanceToCamera(bound.calcCenter());
itemBounds.emplace_back(ItemBound(distance, distance, distance, id));
}
#if 0 /// NEW WAY
{
PerformanceTimer perfTimer("newWay");
// TODO: use a QMap<depth,item> which would give us automatic sorting.
QMap<float, ItemID> depths;
QList<ItemID> sortedItems;
{
PerformanceTimer perfTimer("part1");
// sort against Z
if (frontToBack) {
FrontToBackSort frontToBackSort;
std::sort (itemBounds.begin(), itemBounds.end(), frontToBackSort);
} else {
BackToFrontSort backToFrontSort;
std::sort (itemBounds.begin(), itemBounds.end(), backToFrontSort);
}
for (auto id : inItems) {
auto item = scene->getItem(id);
auto bound = item.getBound();
float distance = args->_viewFrustum->distanceToCamera(bound.calcCenter());
float key = frontToBack ? -distance : distance;
depths.insertMulti(key, id);
}
}
{
PerformanceTimer perfTimer("part2");
sortedItems = depths.values();
}
{
PerformanceTimer perfTimer("part3");
for ( auto sortedID : sortedItems) {
outItems.emplace_back(sortedID);
}
}
// FInally once sorted result to a list of itemID
for (auto& itemBound : itemBounds) {
outItems.emplace_back(itemBound._id);
}
#else /// OLD WAY
{
PerformanceTimer perfTimer("oldWay");
// Make a local dataset of the center distance and closest point distance
std::vector<ItemBound> itemBounds;
{
PerformanceTimer perfTimer("part1");
itemBounds.reserve(outItems.size());
for (auto id : inItems) {
auto item = scene->getItem(id);
auto bound = item.getBound();
float distance = args->_viewFrustum->distanceToCamera(bound.calcCenter());
itemBounds.emplace_back(ItemBound(distance, distance, distance, id));
}
}
{
PerformanceTimer perfTimer("part2");
// sort against Z
if (frontToBack) {
FrontToBackSort frontToBackSort;
std::sort (itemBounds.begin(), itemBounds.end(), frontToBackSort);
} else {
BackToFrontSort backToFrontSort;
std::sort (itemBounds.begin(), itemBounds.end(), backToFrontSort);
}
}
{
PerformanceTimer perfTimer("part3");
// FInally once sorted result to a list of itemID
for (auto& itemBound : itemBounds) {
outItems.emplace_back(itemBound._id);
}
}
}
#endif
}
void render::renderItems(const SceneContextPointer& sceneContext, const RenderContextPointer& renderContext, const ItemIDs& inItems, int maxDrawnItems) {