krageon/openmw-tes3coop
1
0
Fork 0
forked from teamnwah/openmw-tes3coop
Code Issues Pull requests Releases Wiki Activity

fully working fog of war

Browse source
This commit is contained in:
scrawl 2012-03-14 17:44:19 +01:00
parent 583a25f634
commit 5a46d58da5
2 changed files with 128 additions and 38 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

155
apps/openmw/mwrender/localmap.cpp
View file

@ -12,7 +12,13 @@ using namespace Ogre;
#define CACHE_EXTENSION ".jpg"
#define MAP_RESOLUTION 1024 // 1024*1024 pixels for a 8192*8192 area in world units
#define FOGOFWAR_RESOLUTION 1024
// warning: don't set this too high! dynamic textures are a bottleneck
#define FOGOFWAR_RESOLUTION 32
// how many frames to skip before rendering the fog of war.
// example: at 60 fps, a value of 2 would mean to render it at 20 fps.
#define FOGOFWAR_SKIP 2
LocalMap::LocalMap(OEngine::Render::OgreRenderer* rend)
{
@ -25,7 +31,7 @@ LocalMap::LocalMap(OEngine::Render::OgreRenderer* rend)
mCellCamera->setOrientation(Quaternion(sqrt0pt5, -sqrt0pt5, 0, 0));
// Debug overlay to view the maps
render(0, 0, 10000, 10000, 8192, 8192, "Cell_0_0");
MaterialPtr mat = MaterialManager::getSingleton().create("testMaterial", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
@ -33,11 +39,17 @@ LocalMap::LocalMap(OEngine::Render::OgreRenderer* rend)
mat->getTechnique(0)->getPass(0)->setDepthWriteEnabled(false);
mat->getTechnique(0)->getPass(0)->setSceneBlending(SBT_TRANSPARENT_ALPHA);
mat->getTechnique(0)->getPass(0)->setDepthCheckEnabled(false);
mat = MaterialManager::getSingleton().create("testMaterial2", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
mat->getTechnique(0)->getPass(0)->createTextureUnitState("Cell_0_0");
mat->getTechnique(0)->getPass(0)->setDepthWriteEnabled(false);
mat->getTechnique(0)->getPass(0)->setSceneBlending(SBT_TRANSPARENT_ALPHA);
mat->getTechnique(0)->getPass(0)->setDepthCheckEnabled(false);
OverlayManager& ovm = OverlayManager::getSingleton();
Overlay* mOverlay = ovm.create( "testOverlay" );
mOverlay->setZOrder(0);
OverlayContainer* overlay_panel;
overlay_panel = (OverlayContainer*)ovm.createOverlayElement("Panel", "testPanel");
@ -48,11 +60,42 @@ LocalMap::LocalMap(OEngine::Render::OgreRenderer* rend)
overlay_panel->show();
mOverlay->add2D(overlay_panel);
mOverlay->show();
Overlay* mOverlay2 = ovm.create( "testOverlay2" );
mOverlay2->setZOrder(1);
OverlayContainer* overlay_panel2;
overlay_panel2 = (OverlayContainer*)ovm.createOverlayElement("Panel", "testPanel2");
overlay_panel2->_setPosition(0, 0);
overlay_panel2->_setDimensions(0.5, 0.5);
overlay_panel2->setMaterialName( "testMaterial2" );
overlay_panel2->show();
mOverlay2->add2D(overlay_panel2);
mOverlay2->show();
}
LocalMap::~LocalMap()
{
deleteBuffers();
}
void LocalMap::deleteBuffers()
{
for (std::map<std::string, uint32*>::iterator it=mBuffers.begin();
it != mBuffers.end(); ++it)
{
delete it->second;
}
mBuffers.clear();
}
void LocalMap::requestMap(MWWorld::Ptr::CellStore* cell)
{
deleteBuffers();
mInterior = false;
std::string name = "Cell_" + StringConverter::toString(cell->cell->data.gridX)
@ -67,7 +110,10 @@ void LocalMap::requestMap(MWWorld::Ptr::CellStore* cell)
void LocalMap::requestMap(MWWorld::Ptr::CellStore* cell,
AxisAlignedBox bounds)
{
deleteBuffers();
mInterior = true;
mBounds = bounds;
Vector2 z(bounds.getMaximum().y, bounds.getMinimum().y);
Vector2 min(bounds.getMinimum().x, bounds.getMinimum().z);
@ -81,9 +127,12 @@ void LocalMap::requestMap(MWWorld::Ptr::CellStore* cell,
Vector2 center(bounds.getCenter().x, bounds.getCenter().z);
// divide into 8192*8192 segments
/// \todo interiors with more than 1 segment are untested
const int segsX = std::ceil( length.x / 8192 );
const int segsY = std::ceil( length.y / 8192 );
mInteriorName = cell->cell->name;
for (int x=0; x<segsX; ++x)
{
for (int y=0; y<segsY; ++y)
@ -156,7 +205,22 @@ void LocalMap::render(const float x, const float y,
xw*FOGOFWAR_RESOLUTION/8192, yw*FOGOFWAR_RESOLUTION/8192,
0,
PF_A8R8G8B8,
TU_DYNAMIC);
TU_DYNAMIC_WRITE_ONLY);
// create a buffer to use for dynamic operations
uint32* buffer = new uint32[FOGOFWAR_RESOLUTION*FOGOFWAR_RESOLUTION];
// initialize to (0, 0, 0, 1)
uint32* pointer = buffer;
for (int p=0; p<FOGOFWAR_RESOLUTION*FOGOFWAR_RESOLUTION; ++p)
{
*(pointer+p) = (255 << 24);
}
memcpy(tex2->getBuffer()->lock(HardwareBuffer::HBL_DISCARD), buffer, FOGOFWAR_RESOLUTION*FOGOFWAR_RESOLUTION*4);
tex2->getBuffer()->unlock();
mBuffers[texture] = buffer;
/// \todo
// save to cache for next time
@ -165,13 +229,13 @@ void LocalMap::render(const float x, const float y,
}
/*
if (!MaterialManager::getSingleton().getByName("testMaterial").isNull())
{
MaterialPtr mat = MaterialManager::getSingleton().getByName("testMaterial");
mat->getTechnique(0)->getPass(0)->getTextureUnitState(0)->setTextureName(texture);
}
*/
// re-enable fog
mRendering->getScene()->setFog(FOG_LINEAR, clr, 0, fStart, fEnd);
@ -179,17 +243,28 @@ void LocalMap::render(const float x, const float y,
void LocalMap::setPlayerPosition (const Ogre::Vector3& position)
{
#if FOGOFWAR_SKIP != 0
static int count=0;
if (++count % FOGOFWAR_SKIP != 0)
return;
#endif
// retrieve the x,y grid coordinates the player is in
int x,y;
Vector2 pos(position.x, -position.z);
Vector2 pos(position.x, position.z);
if (!mInterior)
{
x = std::ceil(pos.x / 8192.f);
y = std::ceil(pos.y / 8192.f);
x = (int) (pos.x / 8192.f);
y = (int) (pos.y / 8192.f);
}
else
{
/// \todo
Vector2 min(mBounds.getMinimum().x, mBounds.getMinimum().z);
min *= 1.3;
/// \todo interiors with more than 1 segment are untested
x = (int) ((pos.x - min.x)/8192.f);
y = (int) ((pos.y - min.y)/8192.f);
}
// convert from world coordinates to texture UV coordinates
@ -200,47 +275,57 @@ void LocalMap::setPlayerPosition (const Ogre::Vector3& position)
u = std::abs((pos.x - (8192*x))/8192.f);
v = std::abs((pos.y - (8192*y))/8192.f);
texName = "Cell_" + StringConverter::toString(x) + "_"
+ StringConverter::toString(y) + "_fog";
+ StringConverter::toString(y);
}
else
{
/// \todo
Vector2 min(mBounds.getMinimum().x, mBounds.getMinimum().z);
min *= 1.3;
u = (pos.x - min.x - 8192*x)/8192.f;
v = (pos.y - min.y - 8192*y)/8192.f;
texName = mInteriorName + "_" + StringConverter::toString(x) + "_"
+ StringConverter::toString(y);
}
//std::cout << "u " << u<< " v " << v << std::endl;
// explore radius (squared)
const float sqrExploreRadius = 0.001 * FOGOFWAR_RESOLUTION*FOGOFWAR_RESOLUTION;
const float sqrExploreRadius = 0.01 * FOGOFWAR_RESOLUTION*FOGOFWAR_RESOLUTION;
// get the appropriate fog of war texture
TexturePtr tex = TextureManager::getSingleton().getByName(texName);
HardwarePixelBufferSharedPtr buffer = tex->getBuffer();
/*void* data = buffer->lock(HardwareBuffer::HBL_NORMAL);
for (int texU = 0; texU<FOGOFWAR_RESOLUTION; ++texU)
TexturePtr tex = TextureManager::getSingleton().getByName(texName+"_fog");
if (!tex.isNull())
{
// get its buffer
uint32* buffer = mBuffers[texName];
uint32* pointer = buffer;
for (int texV = 0; texV<FOGOFWAR_RESOLUTION; ++texV)
{
float sqrDist = Math::Sqr(texU - u*FOGOFWAR_RESOLUTION) + Math::Sqr(texV - v*FOGOFWAR_RESOLUTION);
uint32 clr = *(uint32*)data;
uint8 alpha = (clr >> 24);
uint8 r=0;
uint8 g=0;
uint8 b=0;
alpha = std::max( alpha, (uint8) (std::max(0.f, std::min(1.f, 1.f-(sqrDist/sqrExploreRadius)))*255) );
*((uint32*)data) = (r) + (g<<8) + (b<<16) + (alpha << 24);
for (int texU = 0; texU<FOGOFWAR_RESOLUTION; ++texU)
{
float sqrDist = Math::Sqr(texU - u*FOGOFWAR_RESOLUTION) + Math::Sqr(texV - v*FOGOFWAR_RESOLUTION);
uint32 clr = *(uint32*)pointer;
uint8 alpha = (clr >> 24);
alpha = std::min( alpha, (uint8) (std::max(0.f, std::min(1.f, (sqrDist/sqrExploreRadius)))*255) );
*((uint32*)pointer) = (alpha << 24);
// move to next texel
data = static_cast<unsigned char*> (data) + sizeof(uint32);
// move to next texel
++pointer;
}
}
}
buffer->unlock();*/
// copy to the texture
memcpy(tex->getBuffer()->lock(HardwareBuffer::HBL_DISCARD), buffer, FOGOFWAR_RESOLUTION*FOGOFWAR_RESOLUTION*4);
tex->getBuffer()->unlock();
if (!MaterialManager::getSingleton().getByName("testMaterial").isNull())
{
MaterialPtr mat = MaterialManager::getSingleton().getByName("testMaterial");
mat->getTechnique(0)->getPass(0)->getTextureUnitState(0)->setTextureName(tex->getName());
if (!MaterialManager::getSingleton().getByName("testMaterial2").isNull())
{
MaterialPtr mat = MaterialManager::getSingleton().getByName("testMaterial2");
mat->getTechnique(0)->getPass(0)->getTextureUnitState(0)->setTextureName(tex->getName());
}
}
}

11
apps/openmw/mwrender/localmap.hpp
View file

@ -14,6 +14,7 @@ namespace MWRender
{
public:
LocalMap(OEngine::Render::OgreRenderer*);
~LocalMap();
/**
* Request the local map for an exterior cell.
@ -51,12 +52,16 @@ namespace MWRender
const float xw, const float yw,
const std::string& texture);
bool mInterior;
// a buffer for the "fog of war" texture of the current cell.
// interior cells could be divided into multiple textures,
// so we store in a map.
std::map <std::string, Ogre::uint8*> mBuffer;
std::map <std::string, Ogre::uint32*> mBuffers;
void deleteBuffers();
bool mInterior;
Ogre::AxisAlignedBox mBounds;
std::string mInteriorName;
};
}