void CDecalRData::RenderDecals(std::vector<CDecalRData*>& decals, const CShaderDefines& context,
ShadowMap* shadow, bool isDummyShader, const CShaderProgramPtr& dummy)
{
CShaderDefines contextDecal = context;
contextDecal.Add("DECAL", "1");
for (size_t i = 0; i < decals.size(); ++i)
{
CDecalRData *decal = decals[i];
CMaterial &material = decal->m_Decal->m_Decal.m_Material;
if (material.GetShaderEffect().length() == 0)
{
LOGERROR(L"Terrain renderer failed to load shader effect.\n");
continue;
}
int numPasses = 1;
CShaderTechniquePtr techBase;
if (!isDummyShader)
{
techBase = g_Renderer.GetShaderManager().LoadEffect(
material.GetShaderEffect(), contextDecal, material.GetShaderDefines());
if (!techBase)
{
LOGERROR(L"Terrain renderer failed to load shader effect (%hs)\n",
material.GetShaderEffect().string().c_str());
continue;
}
numPasses = techBase->GetNumPasses();
}
for (int pass = 0; pass < numPasses; ++pass)
{
if (!isDummyShader)
{
techBase->BeginPass(pass);
TerrainRenderer::PrepareShader(techBase->GetShader(), shadow);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
const CShaderProgramPtr& shader = isDummyShader ? dummy : techBase->GetShader(pass);
if (material.GetSamplers().size() != 0)
{
CMaterial::SamplersVector samplers = material.GetSamplers();
size_t samplersNum = samplers.size();
for (size_t s = 0; s < samplersNum; ++s)
{
CMaterial::TextureSampler &samp = samplers[s];
shader->BindTexture(samp.Name.c_str(), samp.Sampler);
}
material.GetStaticUniforms().BindUniforms(shader);
// TODO: Need to handle floating decals correctly. In particular, we need
// to render non-floating before water and floating after water (to get
// the blending right), and we also need to apply the correct lighting in
// each case, which doesn't really seem possible with the current
// TerrainRenderer.
// Also, need to mark the decals as dirty when water height changes.
// glDisable(GL_TEXTURE_2D);
// m_Decal->GetBounds().Render();
// glEnable(GL_TEXTURE_2D);
u8* base = decal->m_Array.Bind();
GLsizei stride = (GLsizei)decal->m_Array.GetStride();
u8* indexBase = decal->m_IndexArray.Bind();
#if !CONFIG2_GLES
if (isDummyShader)
{
glColor3fv(decal->m_Decal->GetShadingColor().FloatArray());
}
else
#endif
{
shader->Uniform("shadingColor", decal->m_Decal->GetShadingColor());
}
shader->VertexPointer(3, GL_FLOAT, stride, base + decal->m_Position.offset);
shader->ColorPointer(4, GL_UNSIGNED_BYTE, stride, base + decal->m_DiffuseColor.offset);
shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, stride, base + decal->m_UV.offset);
shader->AssertPointersBound();
if (!g_Renderer.m_SkipSubmit)
{
glDrawElements(GL_TRIANGLES, (GLsizei)decal->m_IndexArray.GetNumVertices(), GL_UNSIGNED_SHORT, indexBase);
}
// bump stats
g_Renderer.m_Stats.m_DrawCalls++;
g_Renderer.m_Stats.m_TerrainTris += decal->m_IndexArray.GetNumVertices() / 3;
CVertexBuffer::Unbind();
}
if (!isDummyShader)
{
glDisable(GL_BLEND);
techBase->EndPass();
}
}
}
}
void CPatchRData::RenderBlends(const std::vector<CPatchRData*>& patches, const CShaderDefines& context,
ShadowMap* shadow, bool isDummyShader, const CShaderProgramPtr& dummy)
{
Allocators::Arena<> arena(ARENA_SIZE);
typedef std::vector<SBlendBatch, ProxyAllocator<SBlendBatch, Allocators::Arena<> > > BatchesStack;
BatchesStack batches((BatchesStack::allocator_type(arena)));
CShaderDefines contextBlend = context;
contextBlend.Add("BLEND", "1");
PROFILE_START("compute batches");
// Reserve an arbitrary size that's probably big enough in most cases,
// to avoid heavy reallocations
batches.reserve(256);
typedef std::vector<SBlendStackItem, ProxyAllocator<SBlendStackItem, Allocators::Arena<> > > BlendStacks;
BlendStacks blendStacks((BlendStacks::allocator_type(arena)));
blendStacks.reserve(patches.size());
// Extract all the blend splats from each patch
for (size_t i = 0; i < patches.size(); ++i)
{
CPatchRData* patch = patches[i];
if (!patch->m_BlendSplats.empty())
{
blendStacks.push_back(SBlendStackItem(patch->m_VBBlends, patch->m_VBBlendIndices, patch->m_BlendSplats, arena));
// Reverse the splats so the first to be rendered is at the back of the list
std::reverse(blendStacks.back().splats.begin(), blendStacks.back().splats.end());
}
}
// Rearrange the collection of splats to be grouped by texture, preserving
// order of splats within each patch:
// (This is exactly the same algorithm used in CPatchRData::BuildBlends,
// but applied to patch-sized splats rather than to tile-sized splats;
// see that function for comments on the algorithm.)
while (true)
{
if (!batches.empty())
{
CTerrainTextureEntry* tex = batches.back().m_Texture;
for (size_t k = 0; k < blendStacks.size(); ++k)
{
SBlendStackItem::SplatStack& splats = blendStacks[k].splats;
if (!splats.empty() && splats.back().m_Texture == tex)
{
CVertexBuffer::VBChunk* vertices = blendStacks[k].vertices;
CVertexBuffer::VBChunk* indices = blendStacks[k].indices;
BatchElements& batch = PooledPairGet(PooledMapGet(batches.back().m_Batches, vertices->m_Owner, arena), indices->m_Owner, arena);
batch.first.push_back(splats.back().m_IndexCount);
u8* indexBase = indices->m_Owner->GetBindAddress();
batch.second.push_back(indexBase + sizeof(u16)*(indices->m_Index + splats.back().m_IndexStart));
splats.pop_back();
}
}
}
CTerrainTextureEntry* bestTex = NULL;
size_t bestStackSize = 0;
for (size_t k = 0; k < blendStacks.size(); ++k)
{
SBlendStackItem::SplatStack& splats = blendStacks[k].splats;
if (splats.size() > bestStackSize)
{
bestStackSize = splats.size();
bestTex = splats.back().m_Texture;
}
}
if (bestStackSize == 0)
break;
SBlendBatch layer(arena);
layer.m_Texture = bestTex;
batches.push_back(layer);
}
PROFILE_END("compute batches");
CVertexBuffer* lastVB = NULL;
for (BatchesStack::iterator itt = batches.begin(); itt != batches.end(); ++itt)
{
if (itt->m_Texture->GetMaterial().GetSamplers().size() == 0)
continue;
int numPasses = 1;
CShaderTechniquePtr techBase;
if (!isDummyShader)
{
techBase = g_Renderer.GetShaderManager().LoadEffect(itt->m_Texture->GetMaterial().GetShaderEffect(), contextBlend, itt->m_Texture->GetMaterial().GetShaderDefines());
numPasses = techBase->GetNumPasses();
}
CShaderProgramPtr previousShader;
for (int pass = 0; pass < numPasses; ++pass)
{
if (!isDummyShader)
{
techBase->BeginPass(pass);
TerrainRenderer::PrepareShader(techBase->GetShader(), shadow);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
const CShaderProgramPtr& shader = isDummyShader ? dummy : techBase->GetShader(pass);
if (itt->m_Texture)
{
CMaterial::SamplersVector samplers = itt->m_Texture->GetMaterial().GetSamplers();
size_t samplersNum = samplers.size();
for (size_t s = 0; s < samplersNum; ++s)
{
CMaterial::TextureSampler &samp = samplers[s];
shader->BindTexture(samp.Name.c_str(), samp.Sampler);
}
shader->BindTexture("blendTex", itt->m_Texture->m_TerrainAlpha->second.m_hCompositeAlphaMap);
itt->m_Texture->GetMaterial().GetStaticUniforms().BindUniforms(shader);
#if !CONFIG2_GLES
if (isDummyShader)
{
pglClientActiveTextureARB(GL_TEXTURE0);
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(itt->m_Texture->GetTextureMatrix());
glMatrixMode(GL_MODELVIEW);
}
else
#endif
{
float c = itt->m_Texture->GetTextureMatrix()[0];
float ms = itt->m_Texture->GetTextureMatrix()[8];
shader->Uniform("textureTransform", c, ms, -ms, 0.f);
}
}
else
{
shader->BindTexture("baseTex", g_Renderer.GetTextureManager().GetErrorTexture());
}
for (VertexBufferBatches::iterator itv = itt->m_Batches.begin(); itv != itt->m_Batches.end(); ++itv)
{
// Rebind the VB only if it changed since the last batch
if (itv->first != lastVB || shader != previousShader)
{
lastVB = itv->first;
previousShader = shader;
GLsizei stride = sizeof(SBlendVertex);
SBlendVertex *base = (SBlendVertex *)itv->first->Bind();
shader->VertexPointer(3, GL_FLOAT, stride, &base->m_Position[0]);
shader->ColorPointer(4, GL_UNSIGNED_BYTE, stride, &base->m_DiffuseColor);
shader->NormalPointer(GL_FLOAT, stride, &base->m_Normal[0]);
shader->TexCoordPointer(GL_TEXTURE0, 3, GL_FLOAT, stride, &base->m_Position[0]);
shader->TexCoordPointer(GL_TEXTURE1, 2, GL_FLOAT, stride, &base->m_AlphaUVs[0]);
}
shader->AssertPointersBound();
for (IndexBufferBatches::iterator it = itv->second.begin(); it != itv->second.end(); ++it)
{
it->first->Bind();
BatchElements& batch = it->second;
if (!g_Renderer.m_SkipSubmit)
{
for (size_t i = 0; i < batch.first.size(); ++i)
glDrawElements(GL_TRIANGLES, batch.first[i], GL_UNSIGNED_SHORT, batch.second[i]);
}
g_Renderer.m_Stats.m_DrawCalls++;
g_Renderer.m_Stats.m_BlendSplats++;
g_Renderer.m_Stats.m_TerrainTris += std::accumulate(batch.first.begin(), batch.first.end(), 0) / 3;
}
}
if (!isDummyShader)
{
glDisable(GL_BLEND);
techBase->EndPass();
}
}
}
#if !CONFIG2_GLES
if (isDummyShader)
{
pglClientActiveTextureARB(GL_TEXTURE0);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
}
#endif
CVertexBuffer::Unbind();
}
void ShaderModelRenderer::Render(const RenderModifierPtr& modifier, const CShaderDefines& context, int flags)
{
if (m->submissions.empty())
return;
CMatrix3D worldToCam;
g_Renderer.GetViewCamera().m_Orientation.GetInverse(worldToCam);
/*
* Rendering approach:
*
* m->submissions contains the list of CModels to render.
*
* The data we need to render a model is:
* - CShaderTechnique
* - CTexture
* - CShaderUniforms
* - CModelDef (mesh data)
* - CModel (model instance data)
*
* For efficient rendering, we need to batch the draw calls to minimise state changes.
* (Uniform and texture changes are assumed to be cheaper than binding new mesh data,
* and shader changes are assumed to be most expensive.)
* First, group all models that share a technique to render them together.
* Within those groups, sub-group by CModelDef.
* Within those sub-groups, sub-sub-group by CTexture.
* Within those sub-sub-groups, sub-sub-sub-group by CShaderUniforms.
*
* Alpha-blended models have to be sorted by distance from camera,
* then we can batch as long as the order is preserved.
* Non-alpha-blended models can be arbitrarily reordered to maximise batching.
*
* For each model, the CShaderTechnique is derived from:
* - The current global 'context' defines
* - The CModel's material's defines
* - The CModel's material's shader effect name
*
* There are a smallish number of materials, and a smaller number of techniques.
*
* To minimise technique lookups, we first group models by material,
* in 'materialBuckets' (a hash table).
*
* For each material bucket we then look up the appropriate shader technique.
* If the technique requires sort-by-distance, the model is added to the
* 'sortByDistItems' list with its computed distance.
* Otherwise, the bucket's list of models is sorted by modeldef+texture+uniforms,
* then the technique and model list is added to 'techBuckets'.
*
* 'techBuckets' is then sorted by technique, to improve batching when multiple
* materials map onto the same technique.
*
* (Note that this isn't perfect batching: we don't sort across models in
* multiple buckets that share a technique. In practice that shouldn't reduce
* batching much (we rarely have one mesh used with multiple materials),
* and it saves on copying and lets us sort smaller lists.)
*
* Extra tech buckets are added for the sorted-by-distance models without reordering.
* Finally we render by looping over each tech bucket, then looping over the model
* list in each, rebinding the GL state whenever it changes.
*/
typedef boost::unordered_map<SMRMaterialBucketKey, std::vector<CModel*>, SMRMaterialBucketKeyHash> MaterialBuckets_t;
MaterialBuckets_t materialBuckets;
{
PROFILE3("bucketing by material");
for (size_t i = 0; i < m->submissions.size(); ++i)
{
CModel* model = m->submissions[i];
CShaderDefines defs = model->GetMaterial().GetShaderDefines();
CShaderConditionalDefines condefs = model->GetMaterial().GetConditionalDefines();
for (size_t j = 0; j < condefs.GetSize(); ++j)
{
CShaderConditionalDefines::CondDefine &item = condefs.GetItem(j);
int type = item.m_CondType;
switch (type)
{
case DCOND_DISTANCE:
{
CVector3D modelpos = model->GetTransform().GetTranslation();
float dist = worldToCam.Transform(modelpos).Z;
float dmin = item.m_CondArgs[0];
float dmax = item.m_CondArgs[1];
if ((dmin < 0 || dist >= dmin) && (dmax < 0 || dist < dmax))
defs.Add(item.m_DefName.c_str(), item.m_DefValue.c_str());
break;
}
}
}
SMRMaterialBucketKey key(model->GetMaterial().GetShaderEffect(), defs);
std::vector<CModel*>& bucketItems = materialBuckets[key];
bucketItems.push_back(model);
}
}
std::vector<SMRSortByDistItem> sortByDistItems;
std::vector<CShaderTechniquePtr> sortByDistTechs;
// indexed by sortByDistItems[i].techIdx
// (which stores indexes instead of CShaderTechniquePtr directly
// to avoid the shared_ptr copy cost when sorting; maybe it'd be better
// if we just stored raw CShaderTechnique* and assumed the shader manager
// will keep it alive long enough)
std::vector<SMRTechBucket> techBuckets;
{
PROFILE3("processing material buckets");
for (MaterialBuckets_t::iterator it = materialBuckets.begin(); it != materialBuckets.end(); ++it)
{
CShaderTechniquePtr tech = g_Renderer.GetShaderManager().LoadEffect(it->first.effect, context, it->first.defines);
// Skip invalid techniques (e.g. from data file errors)
if (!tech)
continue;
if (tech->GetSortByDistance())
{
// Add the tech into a vector so we can index it
// (There might be duplicates in this list, but that doesn't really matter)
if (sortByDistTechs.empty() || sortByDistTechs.back() != tech)
sortByDistTechs.push_back(tech);
size_t techIdx = sortByDistTechs.size()-1;
// Add each model into sortByDistItems
for (size_t i = 0; i < it->second.size(); ++i)
{
SMRSortByDistItem itemWithDist;
itemWithDist.techIdx = techIdx;
CModel* model = it->second[i];
itemWithDist.model = model;
CVector3D modelpos = model->GetTransform().GetTranslation();
itemWithDist.dist = worldToCam.Transform(modelpos).Z;
sortByDistItems.push_back(itemWithDist);
}
}
else
{
// Sort model list by modeldef+texture, for batching
// TODO: This only sorts by base texture. While this is an OK approximation
// for most cases (as related samplers are usually used together), it would be better
// to take all the samplers into account when sorting here.
std::sort(it->second.begin(), it->second.end(), SMRBatchModel());
// Add a tech bucket pointing at this model list
SMRTechBucket techBucket = { tech, &it->second[0], it->second.size() };
techBuckets.push_back(techBucket);
}
}
}
{
PROFILE3("sorting tech buckets");
// Sort by technique, for better batching
std::sort(techBuckets.begin(), techBuckets.end(), SMRCompareTechBucket());
}
// List of models corresponding to sortByDistItems[i].model
// (This exists primarily because techBuckets wants a CModel**;
// we could avoid the cost of copying into this list by adding
// a stride length into techBuckets and not requiring contiguous CModel*s)
std::vector<CModel*> sortByDistModels;
if (!sortByDistItems.empty())
{
{
PROFILE3("sorting items by dist");
std::sort(sortByDistItems.begin(), sortByDistItems.end(), SMRCompareSortByDistItem());
}
{
PROFILE3("batching dist-sorted items");
sortByDistModels.reserve(sortByDistItems.size());
// Find runs of distance-sorted models that share a technique,
// and create a new tech bucket for each run
size_t start = 0; // start of current run
size_t currentTechIdx = sortByDistItems[start].techIdx;
for (size_t end = 0; end < sortByDistItems.size(); ++end)
{
sortByDistModels.push_back(sortByDistItems[end].model);
size_t techIdx = sortByDistItems[end].techIdx;
if (techIdx != currentTechIdx)
{
// Start of a new run - push the old run into a new tech bucket
SMRTechBucket techBucket = { sortByDistTechs[currentTechIdx], &sortByDistModels[start], end-start };
techBuckets.push_back(techBucket);
start = end;
currentTechIdx = techIdx;
}
}
// Add the tech bucket for the final run
SMRTechBucket techBucket = { sortByDistTechs[currentTechIdx], &sortByDistModels[start], sortByDistItems.size()-start };
techBuckets.push_back(techBucket);
}
}
{
PROFILE3("rendering bucketed submissions");
size_t idxTechStart = 0;
// This vector keeps track of texture changes during rendering. It is kept outside the
// loops to avoid excessive reallocations. The token allocation of 64 elements
// should be plenty, though it is reallocated below (at a cost) if necessary.
std::vector<CTexture*> currentTexs;
currentTexs.reserve(64);
// texBindings holds the identifier bindings in the shader, which can no longer be defined
// statically in the ShaderRenderModifier class. texBindingNames uses interned strings to
// keep track of when bindings need to be reevaluated.
std::vector<CShaderProgram::Binding> texBindings;
texBindings.reserve(64);
std::vector<CStrIntern> texBindingNames;
texBindingNames.reserve(64);
while (idxTechStart < techBuckets.size())
{
CShaderTechniquePtr currentTech = techBuckets[idxTechStart].tech;
// Find runs [idxTechStart, idxTechEnd) in techBuckets of the same technique
size_t idxTechEnd;
for (idxTechEnd = idxTechStart + 1; idxTechEnd < techBuckets.size(); ++idxTechEnd)
{
if (techBuckets[idxTechEnd].tech != currentTech)
break;
}
// For each of the technique's passes, render all the models in this run
for (int pass = 0; pass < currentTech->GetNumPasses(); ++pass)
{
currentTech->BeginPass(pass);
const CShaderProgramPtr& shader = currentTech->GetShader(pass);
int streamflags = shader->GetStreamFlags();
modifier->BeginPass(shader);
m->vertexRenderer->BeginPass(streamflags);
// When the shader technique changes, textures need to be
// rebound, so ensure there are no remnants from the last pass.
// (the vector size is set to 0, but memory is not freed)
currentTexs.clear();
texBindings.clear();
texBindingNames.clear();
CModelDef* currentModeldef = NULL;
CShaderUniforms currentStaticUniforms;
for (size_t idx = idxTechStart; idx < idxTechEnd; ++idx)
{
CModel** models = techBuckets[idx].models;
size_t numModels = techBuckets[idx].numModels;
for (size_t i = 0; i < numModels; ++i)
{
CModel* model = models[i];
if (flags && !(model->GetFlags() & flags))
continue;
CMaterial::SamplersVector samplers = model->GetMaterial().GetSamplers();
size_t samplersNum = samplers.size();
// make sure the vectors are the right virtual sizes, and also
// reallocate if there are more samplers than expected.
if (currentTexs.size() != samplersNum)
{
currentTexs.resize(samplersNum, NULL);
texBindings.resize(samplersNum, CShaderProgram::Binding());
texBindingNames.resize(samplersNum, CStrIntern());
// ensure they are definitely empty
std::fill(texBindings.begin(), texBindings.end(), CShaderProgram::Binding());
std::fill(currentTexs.begin(), currentTexs.end(), (CTexture*)NULL);
std::fill(texBindingNames.begin(), texBindingNames.end(), CStrIntern());
}
// bind the samplers to the shader
for (size_t s = 0; s < samplersNum; ++s)
{
CMaterial::TextureSampler &samp = samplers[s];
CShaderProgram::Binding bind = texBindings[s];
// check that the handles are current
// and reevaluate them if necessary
if (texBindingNames[s] == samp.Name && bind.Active())
{
bind = texBindings[s];
}
else
{
bind = shader->GetTextureBinding(samp.Name.c_str());
texBindings[s] = bind;
texBindingNames[s] = samp.Name;
}
// same with the actual sampler bindings
CTexture* newTex = samp.Sampler.get();
if (bind.Active() && newTex != currentTexs[s])
{
shader->BindTexture(bind, samp.Sampler->GetHandle());
currentTexs[s] = newTex;
}
}
// Bind modeldef when it changes
CModelDef* newModeldef = model->GetModelDef().get();
if (newModeldef != currentModeldef)
{
currentModeldef = newModeldef;
m->vertexRenderer->PrepareModelDef(shader, streamflags, *currentModeldef);
}
// Bind all uniforms when any change
CShaderUniforms newStaticUniforms = model->GetMaterial().GetStaticUniforms();
if (newStaticUniforms != currentStaticUniforms)
{
currentStaticUniforms = newStaticUniforms;
currentStaticUniforms.BindUniforms(shader);
}
CShaderRenderQueries renderQueries = model->GetMaterial().GetRenderQueries();
for (size_t q = 0; q < renderQueries.GetSize(); q++)
{
CShaderRenderQueries::RenderQuery rq = renderQueries.GetItem(q);
//if (str == g_Renderer.GetShaderManager().QueryTime)
if (rq.first == RQUERY_TIME)
{
//renderQueries.Set(str, (float)time, 0.0f, 0.0f, 0.0f);
//shader->Uniform(rq.second, CVector3D(time,0,0));
CShaderProgram::Binding binding = shader->GetUniformBinding(rq.second);
if (binding.Active())
{
double time = g_Renderer.GetTimeManager().GetGlobalTime();
shader->Uniform(binding, time, 0,0,0);
}
}
}
//renderQueries.BindUniforms(shader);
modifier->PrepareModel(shader, model);
CModelRData* rdata = static_cast<CModelRData*>(model->GetRenderData());
ENSURE(rdata->GetKey() == m->vertexRenderer.get());
m->vertexRenderer->RenderModel(shader, streamflags, model, rdata);
}
}
m->vertexRenderer->EndPass(streamflags);
currentTech->EndPass(pass);
}
idxTechStart = idxTechEnd;
}
}
}
void CPatchRData::RenderBases(const std::vector<CPatchRData*>& patches, const CShaderDefines& context,
ShadowMap* shadow, bool isDummyShader, const CShaderProgramPtr& dummy)
{
Allocators::Arena<> arena(ARENA_SIZE);
TextureBatches batches (TextureBatches::key_compare(), (TextureBatches::allocator_type(arena)));
PROFILE_START("compute batches");
// Collect all the patches' base splats into their appropriate batches
for (size_t i = 0; i < patches.size(); ++i)
{
CPatchRData* patch = patches[i];
for (size_t j = 0; j < patch->m_Splats.size(); ++j)
{
SSplat& splat = patch->m_Splats[j];
BatchElements& batch = PooledPairGet(
PooledMapGet(
PooledMapGet(batches, splat.m_Texture, arena),
patch->m_VBBase->m_Owner, arena
),
patch->m_VBBaseIndices->m_Owner, arena
);
batch.first.push_back(splat.m_IndexCount);
u8* indexBase = patch->m_VBBaseIndices->m_Owner->GetBindAddress();
batch.second.push_back(indexBase + sizeof(u16)*(patch->m_VBBaseIndices->m_Index + splat.m_IndexStart));
}
}
PROFILE_END("compute batches");
// Render each batch
for (TextureBatches::iterator itt = batches.begin(); itt != batches.end(); ++itt)
{
int numPasses = 1;
CShaderTechniquePtr techBase;
if (!isDummyShader)
{
if (itt->first->GetMaterial().GetShaderEffect().length() == 0)
{
LOGERROR(L"Terrain renderer failed to load shader effect.\n");
continue;
}
techBase = g_Renderer.GetShaderManager().LoadEffect(itt->first->GetMaterial().GetShaderEffect(),
context, itt->first->GetMaterial().GetShaderDefines());
numPasses = techBase->GetNumPasses();
}
for (int pass = 0; pass < numPasses; ++pass)
{
if (!isDummyShader)
{
techBase->BeginPass(pass);
TerrainRenderer::PrepareShader(techBase->GetShader(), shadow);
}
const CShaderProgramPtr& shader = isDummyShader ? dummy : techBase->GetShader(pass);
if (itt->first->GetMaterial().GetSamplers().size() != 0)
{
CMaterial::SamplersVector samplers = itt->first->GetMaterial().GetSamplers();
size_t samplersNum = samplers.size();
for (size_t s = 0; s < samplersNum; ++s)
{
CMaterial::TextureSampler &samp = samplers[s];
shader->BindTexture(samp.Name.c_str(), samp.Sampler);
}
itt->first->GetMaterial().GetStaticUniforms().BindUniforms(shader);
#if !CONFIG2_GLES
if (isDummyShader)
{
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(itt->first->GetTextureMatrix());
glMatrixMode(GL_MODELVIEW);
}
else
#endif
{
float c = itt->first->GetTextureMatrix()[0];
float ms = itt->first->GetTextureMatrix()[8];
shader->Uniform("textureTransform", c, ms, -ms, 0.f);
}
}
else
{
shader->BindTexture("baseTex", g_Renderer.GetTextureManager().GetErrorTexture());
}
for (VertexBufferBatches::iterator itv = itt->second.begin(); itv != itt->second.end(); ++itv)
{
GLsizei stride = sizeof(SBaseVertex);
SBaseVertex *base = (SBaseVertex *)itv->first->Bind();
shader->VertexPointer(3, GL_FLOAT, stride, &base->m_Position[0]);
shader->ColorPointer(4, GL_UNSIGNED_BYTE, stride, &base->m_DiffuseColor);
shader->NormalPointer(GL_FLOAT, stride, &base->m_Normal[0]);
shader->TexCoordPointer(GL_TEXTURE0, 3, GL_FLOAT, stride, &base->m_Position[0]);
shader->AssertPointersBound();
for (IndexBufferBatches::iterator it = itv->second.begin(); it != itv->second.end(); ++it)
{
it->first->Bind();
BatchElements& batch = it->second;
if (!g_Renderer.m_SkipSubmit)
{
// Don't use glMultiDrawElements here since it doesn't have a significant
// performance impact and it suffers from various driver bugs (e.g. it breaks
// in Mesa 7.10 swrast with index VBOs)
for (size_t i = 0; i < batch.first.size(); ++i)
glDrawElements(GL_TRIANGLES, batch.first[i], GL_UNSIGNED_SHORT, batch.second[i]);
}
g_Renderer.m_Stats.m_DrawCalls++;
g_Renderer.m_Stats.m_TerrainTris += std::accumulate(batch.first.begin(), batch.first.end(), 0) / 3;
}
}
if (!isDummyShader)
techBase->EndPass();
}
}
#if !CONFIG2_GLES
if (isDummyShader)
{
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
}
#endif
CVertexBuffer::Unbind();
}