blender/source/gameengine/Rasterizer/RAS_BucketManager.cpp
Mike Erwin f91fe78af5 cleanup: spelling, comments, alignment
fixed pet peeve “frustrum” and other non-functional changes.
2016-01-28 01:36:12 -05:00

381 lines
11 KiB
C++

/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file gameengine/Rasterizer/RAS_BucketManager.cpp
* \ingroup bgerast
*/
#ifdef _MSC_VER
/* don't show these anoying STL warnings */
# pragma warning (disable:4786)
#endif
#include "RAS_MaterialBucket.h"
#include "RAS_MeshObject.h"
#include "RAS_Polygon.h"
#include "RAS_IPolygonMaterial.h"
#include "RAS_IRasterizer.h"
#include "RAS_BucketManager.h"
#include <algorithm>
/* sorting */
struct RAS_BucketManager::sortedmeshslot
{
public:
MT_Scalar m_z; /* depth */
RAS_MeshSlot *m_ms; /* mesh slot */
RAS_MaterialBucket *m_bucket; /* buck mesh slot came from */
sortedmeshslot() {}
void set(RAS_MeshSlot *ms, RAS_MaterialBucket *bucket, const MT_Vector3& pnorm)
{
// would be good to use the actual bounding box center instead
MT_Point3 pos(ms->m_OpenGLMatrix[12], ms->m_OpenGLMatrix[13], ms->m_OpenGLMatrix[14]);
m_z = MT_dot(pnorm, pos);
m_ms = ms;
m_bucket = bucket;
}
};
struct RAS_BucketManager::backtofront
{
bool operator()(const sortedmeshslot &a, const sortedmeshslot &b)
{
return (a.m_z < b.m_z) || (a.m_z == b.m_z && a.m_ms < b.m_ms);
}
};
struct RAS_BucketManager::fronttoback
{
bool operator()(const sortedmeshslot &a, const sortedmeshslot &b)
{
return (a.m_z > b.m_z) || (a.m_z == b.m_z && a.m_ms > b.m_ms);
}
};
/* bucket manager */
RAS_BucketManager::RAS_BucketManager()
{
}
RAS_BucketManager::~RAS_BucketManager()
{
BucketList::iterator it;
for (it = m_SolidBuckets.begin(); it != m_SolidBuckets.end(); it++)
delete (*it);
for (it = m_AlphaBuckets.begin(); it != m_AlphaBuckets.end(); it++)
delete(*it);
m_SolidBuckets.clear();
m_AlphaBuckets.clear();
}
void RAS_BucketManager::OrderBuckets(const MT_Transform& cameratrans, BucketList& buckets, vector<sortedmeshslot>& slots, bool alpha)
{
BucketList::iterator bit;
list<RAS_MeshSlot>::iterator mit;
size_t size = 0, i = 0;
/* Camera's near plane equation: pnorm.dot(point) + pval,
* but we leave out pval since it's constant anyway */
const MT_Vector3 pnorm(cameratrans.getBasis()[2]);
for (bit = buckets.begin(); bit != buckets.end(); ++bit)
{
SG_DList::iterator<RAS_MeshSlot> mit((*bit)->GetActiveMeshSlots());
for (mit.begin(); !mit.end(); ++mit)
size++;
}
slots.resize(size);
for (bit = buckets.begin(); bit != buckets.end(); ++bit)
{
RAS_MaterialBucket* bucket = *bit;
RAS_MeshSlot* ms;
// remove the mesh slot from the list, it culls them automatically for next frame
while ((ms = bucket->GetNextActiveMeshSlot())) {
slots[i++].set(ms, bucket, pnorm);
}
}
if (alpha)
sort(slots.begin(), slots.end(), backtofront());
else
sort(slots.begin(), slots.end(), fronttoback());
}
void RAS_BucketManager::RenderAlphaBuckets(const MT_Transform& cameratrans, RAS_IRasterizer* rasty)
{
vector<sortedmeshslot> slots;
vector<sortedmeshslot>::iterator sit;
// Having depth masks disabled/enabled gives different artifacts in
// case no sorting is done or is done inexact. For compatibility, we
// disable it.
if (rasty->GetDrawingMode() != RAS_IRasterizer::KX_SHADOW)
rasty->SetDepthMask(RAS_IRasterizer::KX_DEPTHMASK_DISABLED);
OrderBuckets(cameratrans, m_AlphaBuckets, slots, true);
for (sit=slots.begin(); sit!=slots.end(); ++sit) {
rasty->SetClientObject(sit->m_ms->m_clientObj);
while (sit->m_bucket->ActivateMaterial(cameratrans, rasty))
sit->m_bucket->RenderMeshSlot(cameratrans, rasty, *(sit->m_ms));
// make this mesh slot culled automatically for next frame
// it will be culled out by frustum culling
sit->m_ms->SetCulled(true);
}
rasty->SetDepthMask(RAS_IRasterizer::KX_DEPTHMASK_ENABLED);
}
void RAS_BucketManager::RenderSolidBuckets(const MT_Transform& cameratrans, RAS_IRasterizer* rasty)
{
BucketList::iterator bit;
rasty->SetDepthMask(RAS_IRasterizer::KX_DEPTHMASK_ENABLED);
for (bit = m_SolidBuckets.begin(); bit != m_SolidBuckets.end(); ++bit) {
#if 1
RAS_MaterialBucket* bucket = *bit;
RAS_MeshSlot* ms;
// remove the mesh slot from the list, it culls them automatically for next frame
while ((ms = bucket->GetNextActiveMeshSlot())) {
rasty->SetClientObject(ms->m_clientObj);
while (bucket->ActivateMaterial(cameratrans, rasty))
bucket->RenderMeshSlot(cameratrans, rasty, *ms);
// make this mesh slot culled automatically for next frame
// it will be culled out by frustum culling
ms->SetCulled(true);
}
#else
list<RAS_MeshSlot>::iterator mit;
for (mit = (*bit)->msBegin(); mit != (*bit)->msEnd(); ++mit) {
if (mit->IsCulled())
continue;
rasty->SetClientObject(rasty, mit->m_clientObj);
while ((*bit)->ActivateMaterial(cameratrans, rasty))
(*bit)->RenderMeshSlot(cameratrans, rasty, *mit);
// make this mesh slot culled automatically for next frame
// it will be culled out by frustum culling
mit->SetCulled(true);
}
#endif
}
/* this code draws meshes order front-to-back instead to reduce overdraw.
* it turned out slower due to much material state switching, a more clever
* algorithm might do better. */
#if 0
vector<sortedmeshslot> slots;
vector<sortedmeshslot>::iterator sit;
OrderBuckets(cameratrans, m_SolidBuckets, slots, false);
for (sit=slots.begin(); sit!=slots.end(); ++sit) {
rendertools->SetClientObject(rasty, sit->m_ms->m_clientObj);
while (sit->m_bucket->ActivateMaterial(cameratrans, rasty))
sit->m_bucket->RenderMeshSlot(cameratrans, rasty, *(sit->m_ms));
}
#endif
}
void RAS_BucketManager::Renderbuckets(const MT_Transform& cameratrans, RAS_IRasterizer* rasty)
{
/* beginning each frame, clear (texture/material) caching information */
rasty->ClearCachingInfo();
RenderSolidBuckets(cameratrans, rasty);
RenderAlphaBuckets(cameratrans, rasty);
/* If we're drawing shadows and bucket wasn't rendered (outside of the lamp frustum or doesn't cast shadows)
* then the mesh is still modified, so we don't want to set MeshModified to false yet (it will mess up
* updating display lists). Just leave this step for the main render pass.
*/
if (rasty->GetDrawingMode() != RAS_IRasterizer::KX_SHADOW) {
/* All meshes should be up to date now */
/* Don't do this while processing buckets because some meshes are split between buckets */
BucketList::iterator bit;
list<RAS_MeshSlot>::iterator mit;
for (bit = m_SolidBuckets.begin(); bit != m_SolidBuckets.end(); ++bit) {
for (mit = (*bit)->msBegin(); mit != (*bit)->msEnd(); ++mit) {
mit->m_mesh->SetMeshModified(false);
}
}
for (bit = m_AlphaBuckets.begin(); bit != m_AlphaBuckets.end(); ++bit) {
for (mit = (*bit)->msBegin(); mit != (*bit)->msEnd(); ++mit) {
mit->m_mesh->SetMeshModified(false);
}
}
}
rasty->SetClientObject(NULL);
}
RAS_MaterialBucket *RAS_BucketManager::FindBucket(RAS_IPolyMaterial *material, bool &bucketCreated)
{
BucketList::iterator it;
bucketCreated = false;
for (it = m_SolidBuckets.begin(); it != m_SolidBuckets.end(); it++)
if (*(*it)->GetPolyMaterial() == *material)
return *it;
for (it = m_AlphaBuckets.begin(); it != m_AlphaBuckets.end(); it++)
if (*(*it)->GetPolyMaterial() == *material)
return *it;
RAS_MaterialBucket *bucket = new RAS_MaterialBucket(material);
bucketCreated = true;
if (bucket->IsAlpha())
m_AlphaBuckets.push_back(bucket);
else
m_SolidBuckets.push_back(bucket);
return bucket;
}
void RAS_BucketManager::OptimizeBuckets(MT_Scalar distance)
{
BucketList::iterator bit;
distance = 10.0f;
for (bit = m_SolidBuckets.begin(); bit != m_SolidBuckets.end(); ++bit)
(*bit)->Optimize(distance);
for (bit = m_AlphaBuckets.begin(); bit != m_AlphaBuckets.end(); ++bit)
(*bit)->Optimize(distance);
}
void RAS_BucketManager::ReleaseDisplayLists(RAS_IPolyMaterial *mat)
{
BucketList::iterator bit;
list<RAS_MeshSlot>::iterator mit;
for (bit = m_SolidBuckets.begin(); bit != m_SolidBuckets.end(); ++bit) {
if (mat == NULL || (mat == (*bit)->GetPolyMaterial())) {
for (mit = (*bit)->msBegin(); mit != (*bit)->msEnd(); ++mit) {
if (mit->m_DisplayList) {
mit->m_DisplayList->Release();
mit->m_DisplayList = NULL;
}
}
}
}
for (bit = m_AlphaBuckets.begin(); bit != m_AlphaBuckets.end(); ++bit) {
if (mat == NULL || (mat == (*bit)->GetPolyMaterial())) {
for (mit = (*bit)->msBegin(); mit != (*bit)->msEnd(); ++mit) {
if (mit->m_DisplayList) {
mit->m_DisplayList->Release();
mit->m_DisplayList = NULL;
}
}
}
}
}
void RAS_BucketManager::ReleaseMaterials(RAS_IPolyMaterial * mat)
{
BucketList::iterator bit;
list<RAS_MeshSlot>::iterator mit;
for (bit = m_SolidBuckets.begin(); bit != m_SolidBuckets.end(); ++bit) {
if (mat == NULL || (mat == (*bit)->GetPolyMaterial())) {
(*bit)->GetPolyMaterial()->ReleaseMaterial();
}
}
for (bit = m_AlphaBuckets.begin(); bit != m_AlphaBuckets.end(); ++bit) {
if (mat == NULL || (mat == (*bit)->GetPolyMaterial())) {
(*bit)->GetPolyMaterial()->ReleaseMaterial();
}
}
}
/* frees the bucket, only used when freeing scenes */
void RAS_BucketManager::RemoveMaterial(RAS_IPolyMaterial * mat)
{
BucketList::iterator bit, bitp;
list<RAS_MeshSlot>::iterator mit;
int i;
for (i=0; i<m_SolidBuckets.size(); i++) {
RAS_MaterialBucket *bucket = m_SolidBuckets[i];
if (mat == bucket->GetPolyMaterial()) {
m_SolidBuckets.erase(m_SolidBuckets.begin()+i);
delete bucket;
i--;
}
}
for (int i=0; i<m_AlphaBuckets.size(); i++) {
RAS_MaterialBucket *bucket = m_AlphaBuckets[i];
if (mat == bucket->GetPolyMaterial()) {
m_AlphaBuckets.erase(m_AlphaBuckets.begin()+i);
delete bucket;
i--;
}
}
}
//#include <stdio.h>
void RAS_BucketManager::MergeBucketManager(RAS_BucketManager *other, SCA_IScene *scene)
{
/* concatenate lists */
// printf("BEFORE %d %d\n", GetSolidBuckets().size(), GetAlphaBuckets().size());
GetSolidBuckets().insert( GetSolidBuckets().end(), other->GetSolidBuckets().begin(), other->GetSolidBuckets().end() );
other->GetSolidBuckets().clear();
GetAlphaBuckets().insert( GetAlphaBuckets().end(), other->GetAlphaBuckets().begin(), other->GetAlphaBuckets().end() );
other->GetAlphaBuckets().clear();
//printf("AFTER %d %d\n", GetSolidBuckets().size(), GetAlphaBuckets().size());
}