Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-02-03 Thread Rômulo Cerqueira 
Hi Sebastian,

thanks for all comments. Do you know how I can manage these six faces of 
cubemap? I can handle all faces using one texture or I need to create six 
textures?

I really need help with this...It's essential to my project.
... 

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-02-03 Thread Sebastian Messerschmidt 



Hi,

Hi Sebastian,

I have managed the normal and depth using MRT-FBO. I changed the osgdeferred 
example to display the normal (blue) and depth (green). Now I need to repeat 
this process for each six faces of cubemap.

Nice to see that you're making progress.


I have a question: to capture the normal/depth data, as seen in Figure, I used 
the eye space. For dynamic cubemap, I need to use the eye space or world space?
Usually cubemaps are in world-space as they represent the view from a 
certain world-coordinate.


Cheers
Sebastian

...

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-02-03 Thread Rômulo Cerqueira 
Hi Sebastian,

I have managed the normal and depth using MRT-FBO. I changed the osgdeferred 
example to display the normal (blue) and depth (green). Now I need to repeat 
this process for each six faces of cubemap.

I have a question: to capture the normal/depth data, as seen in Figure, I used 
the eye space. For dynamic cubemap, I need to use the eye space or world space?
... 

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-01-30 Thread Sebastian Messerschmidt 

I'll try a last time:



Hi,

I still have problems to manage the normal view from reflected objects (using 
dynamic cubemaps technique). Please any tip here?



Have you managed to render your normals, colors, depth etc to a MRT-FBO?
If so, the next step is to render to do this 6 times, where each time 
you're FBO-attachments are the images of your cube-maps. You will need 
separate cubemaps for the normals, colors etc.


Simply tell us where you're stuck. Last time it sounded like you're on a 
good way, but I personally don't have much time to help you with the 
detailed problems you encountered.


Cheers
Sebastian.


...

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-01-29 Thread Rômulo Cerqueira 
Hi,

I still have problems to manage the normal view from reflected objects (using 
dynamic cubemaps technique). Please any tip here? 
... 

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-01-11 Thread Rômulo Cerqueira 
Moreover, I installed the openscenegraph-examples package (using Ubuntu), 
however the osgdeferred example does not contain all complementary data (i.e. 
data/shaders/simpleShader01, data/shaders/colorTextureShader and 
data/shaders/lightingPass).

I could not find these shader codes in 
https://github.com/openscenegraph/OpenSceneGraph-Data.

... 

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2018-01-11 Thread Rômulo Cerqueira 
Hi Sebastian,

I believe copying and pasting code is not the case here. I have read a lot 
about MRT, RTT and FBO and debugged some source code examples (including your 
hints), however I still have problems in my side to compute the normal.

So let's go to new doubts:
- In Kapelko's example, if I disable the bumpmap use, why is the normal still 
computed by using the TBN matrix (please see [0])? Why the nn is set to 
vec3(1.0)? In addition, why one of the walls does not contains data (green 
channel is missing?) - please see attachment?


[0] 
https://bitbucket.org/kornerr/osg-deferred-shading/src/2b2f5532f41c305b31c46467291281388657b392/pass2.frag?at=default=file-view-default#pass2.frag-20
- 
... 

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2017-12-27 Thread Sebastian Messerschmidt 


Hi Rômulo,

I already tried to describe the building-blocks for the way:

1. Render to FBO with MRT (see osgmultiplerendertargets example for 
this). The MRT/FBO-attachments should be your color, normal and depth.
You'll need to use a shader that writes the correct information to the 
correct buffers. That's all in the example. Basically that's deferred 
rendering's approach. An example by Michael Kapelko can be found here: [0].


2. Once you understand how to render to one FBO you can use your 
approach to render to the individual faces of your cubemap.


You need to learn the basics. Pasting source code might not attract a 
lot of attention, so please try to follow my hints before asking the 
question over and over.



[0] 
https://bitbucket.org/kornerr/osg-deferred-shading/src/5b8555059707?at=default



Cheers
Sebastian



Am 26.12.2017 um 18:17 schrieb Rômulo Cerqueira:

Hi Roberto and Sebastian,

sorry for my duplicated post. I need to render the depth/normal surface to 
texture of reflected objects by cube maps.

Until this moment, I got the depth data. Could you help me to get the normal 
data too (as single channel data). My current code follows below:

C++ code:

Code:

// OSG includes
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

// C++ includes
#include 

#define SHADER_PATH_FRAG "normal_depth_map/shaders/normalDepthMap.frag"
#define SHADER_PATH_VERT "normal_depth_map/shaders/normalDepthMap.vert"

#define BOOST_TEST_MODULE "DynamicCubeMap_test"

using namespace osg;

unsigned int numTextures = 6;

enum TextureUnitTypes {
 TEXTURE_UNIT_DIFFUSE,
 TEXTURE_UNIT_NORMAL,
 TEXTURE_UNIT_CUBEMAP
};

osg::ref_ptr _create_scene() {
 osg::ref_ptr scene = new osg::Group;

 osg::ref_ptr geode = new osg::Geode;
 scene->addChild(geode.get());

 const float radius = 0.8f;
 const float height = 1.0f;
 osg::ref_ptr shape;

 // sphere
 shape = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(-3.0f, 0.0f, 
0.0f), radius));
 shape->setColor(osg::Vec4(0.6f, 0.8f, 0.8f, 1.0f));
 geode->addDrawable(shape.get());

 // box
 shape = new osg::ShapeDrawable(new osg::Box(osg::Vec3(3.0f, 0.0f, 0.0f), 2 
* radius));
 shape->setColor(osg::Vec4(0.4f, 0.9f, 0.3f, 1.0f));
 geode->addDrawable(shape.get());

 // cone
 shape = new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(0.0f, 0.0f, 
-3.0f), radius, height));
 shape->setColor(osg::Vec4(1.0f, 0.3f, 0.3f, 1.0f));
 geode->addDrawable(shape.get());

 // cylinder
 shape = new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0f, 0.0f, 3.0f), 
2* radius));
 shape->setColor(osg::Vec4(0.8f, 0.8f, 0.4f, 1.0f));
 geode->addDrawable(shape.get());

 return scene;
}

osg::NodePath createReflector() {
 Geode* node = new Geode;
 const float radius = 0.8f;
 ref_ptr hints = new TessellationHints;
 hints->setDetailRatio(2.0f);
 ShapeDrawable* shape = new ShapeDrawable(new Sphere(Vec3(0.0f, 0.0f, 
0.0f), radius * 1.5f), hints.get());
 shape->setColor(Vec4(0.8f, 0.8f, 0.8f, 1.0f));
 node->addDrawable(shape);

 osg::NodePath nodeList;
 nodeList.push_back(node);

 return nodeList;
}

class UpdateCameraAndTexGenCallback : public osg::NodeCallback
{
 public:

 typedef std::vector< osg::ref_ptr >  CameraList;

 UpdateCameraAndTexGenCallback(osg::NodePath& reflectorNodePath, 
CameraList& Cameras):
 _reflectorNodePath(reflectorNodePath),
 _Cameras(Cameras)
 {
 }

 virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 {
 // first update subgraph to make sure objects are all moved into 
position
 traverse(node,nv);

 // compute the position of the center of the reflector subgraph
 osg::Matrixd worldToLocal = 
osg::computeWorldToLocal(_reflectorNodePath);
 osg::BoundingSphere bs = _reflectorNodePath.back()->getBound();
 osg::Vec3 position = bs.center();

 typedef std::pair ImageData;
 const ImageData id[] =
 {
 ImageData( osg::Vec3( 1,  0,  0), osg::Vec3( 0, -1,  0) ), // 
+X
 ImageData( osg::Vec3(-1,  0,  0), osg::Vec3( 0, -1,  0) ), // 
-X
 ImageData( osg::Vec3( 0,  1,  0), osg::Vec3( 0,  0,  1) ), // 
+Y
 ImageData( osg::Vec3( 0, -1,  0), osg::Vec3( 0,  0, -1) ), // 
-Y
 ImageData( osg::Vec3( 0,  0,  1), osg::Vec3( 0, -1,  0) ), // 
+Z
 ImageData( osg::Vec3( 0,  0, -1), osg::Vec3( 0, -1,  0) )  // 
-Z
 };

 for(unsigned int i = 0; i < 6 && i < _Cameras.size(); ++i) {
 osg::Matrix localOffset;
 
localOffset.makeLookAt(position,position+id[i].first,id[i].second);

 osg::Matrix viewMatrix = worldToLocal*localOffset;

Re: [osg-users] Normal Mapping using Dynamic Cubemap

2017-12-26 Thread Rômulo Cerqueira 
Hi Roberto and Sebastian,

sorry for my duplicated post. I need to render the depth/normal surface to 
texture of reflected objects by cube maps.

Until this moment, I got the depth data. Could you help me to get the normal 
data too (as single channel data). My current code follows below:

C++ code:

Code:

// OSG includes
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

// C++ includes
#include 

#define SHADER_PATH_FRAG "normal_depth_map/shaders/normalDepthMap.frag"
#define SHADER_PATH_VERT "normal_depth_map/shaders/normalDepthMap.vert"

#define BOOST_TEST_MODULE "DynamicCubeMap_test"

using namespace osg;

unsigned int numTextures = 6;

enum TextureUnitTypes {
TEXTURE_UNIT_DIFFUSE,
TEXTURE_UNIT_NORMAL,
TEXTURE_UNIT_CUBEMAP
};

osg::ref_ptr _create_scene() {
osg::ref_ptr scene = new osg::Group;

osg::ref_ptr geode = new osg::Geode;
scene->addChild(geode.get());

const float radius = 0.8f;
const float height = 1.0f;
osg::ref_ptr shape;

// sphere
shape = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(-3.0f, 0.0f, 
0.0f), radius));
shape->setColor(osg::Vec4(0.6f, 0.8f, 0.8f, 1.0f));
geode->addDrawable(shape.get());

// box
shape = new osg::ShapeDrawable(new osg::Box(osg::Vec3(3.0f, 0.0f, 0.0f), 2 
* radius));
shape->setColor(osg::Vec4(0.4f, 0.9f, 0.3f, 1.0f));
geode->addDrawable(shape.get());

// cone
shape = new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(0.0f, 0.0f, 
-3.0f), radius, height));
shape->setColor(osg::Vec4(1.0f, 0.3f, 0.3f, 1.0f));
geode->addDrawable(shape.get());

// cylinder
shape = new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0f, 0.0f, 3.0f), 2* 
radius));
shape->setColor(osg::Vec4(0.8f, 0.8f, 0.4f, 1.0f));
geode->addDrawable(shape.get());

return scene;
}

osg::NodePath createReflector() {
Geode* node = new Geode;
const float radius = 0.8f;
ref_ptr hints = new TessellationHints;
hints->setDetailRatio(2.0f);
ShapeDrawable* shape = new ShapeDrawable(new Sphere(Vec3(0.0f, 0.0f, 0.0f), 
radius * 1.5f), hints.get());
shape->setColor(Vec4(0.8f, 0.8f, 0.8f, 1.0f));
node->addDrawable(shape);

osg::NodePath nodeList;
nodeList.push_back(node);

return nodeList;
}

class UpdateCameraAndTexGenCallback : public osg::NodeCallback
{
public:

typedef std::vector< osg::ref_ptr >  CameraList;

UpdateCameraAndTexGenCallback(osg::NodePath& reflectorNodePath, 
CameraList& Cameras):
_reflectorNodePath(reflectorNodePath),
_Cameras(Cameras)
{
}

virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
// first update subgraph to make sure objects are all moved into 
position
traverse(node,nv);

// compute the position of the center of the reflector subgraph
osg::Matrixd worldToLocal = 
osg::computeWorldToLocal(_reflectorNodePath);
osg::BoundingSphere bs = _reflectorNodePath.back()->getBound();
osg::Vec3 position = bs.center();

typedef std::pair ImageData;
const ImageData id[] =
{
ImageData( osg::Vec3( 1,  0,  0), osg::Vec3( 0, -1,  0) ), // +X
ImageData( osg::Vec3(-1,  0,  0), osg::Vec3( 0, -1,  0) ), // -X
ImageData( osg::Vec3( 0,  1,  0), osg::Vec3( 0,  0,  1) ), // +Y
ImageData( osg::Vec3( 0, -1,  0), osg::Vec3( 0,  0, -1) ), // -Y
ImageData( osg::Vec3( 0,  0,  1), osg::Vec3( 0, -1,  0) ), // +Z
ImageData( osg::Vec3( 0,  0, -1), osg::Vec3( 0, -1,  0) )  // -Z
};

for(unsigned int i = 0; i < 6 && i < _Cameras.size(); ++i) {
osg::Matrix localOffset;

localOffset.makeLookAt(position,position+id[i].first,id[i].second);

osg::Matrix viewMatrix = worldToLocal*localOffset;

_Cameras[i]->setReferenceFrame(osg::Camera::ABSOLUTE_RF);

_Cameras[i]->setProjectionMatrixAsFrustum(-1.0,1.0,-1.0,1.0,1.0,1.0);
_Cameras[i]->setViewMatrix(viewMatrix);
}
}

protected:

virtual ~UpdateCameraAndTexGenCallback() {}

osg::NodePath   _reflectorNodePath;
CameraList  _Cameras;
};

class TexMatCullCallback : public osg::NodeCallback
{
public:

TexMatCullCallback(osg::TexMat* texmat):
_texmat(texmat)
{
}

virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
// first update subgraph to make sure objects are all moved into 
position
traverse(node,nv);

osgUtil::CullVisitor* cv = dynamic_cast(nv);
if (cv)
{
osg::Quat q =

Re: [osg-users] Normal Mapping using Dynamic Cubemap

2017-12-19 Thread Rômulo Cerqueira 
Hi Sebastian,

can you help me to find an example? I've been looking for this solution for 
almost two months.
... 

Thank you!

Cheers,
Rômulo

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Re: [osg-users] Normal Mapping using Dynamic Cubemap

2017-12-19 Thread Sebastian Messerschmidt 

Hi Rômulo,

Repeating the question won't magically solve it.

If you're after rendering normals and depth into textures (it doesn't 
matter if you are rendering to cubemap-faces IMHO) then see the multiple 
rendering target (MRT) example. Basically you need to attach a depth and 
normal target to your FBO and in a custom shader write the information 
to it (basically that's the first step in deferred rendering). There are 
some deferred-rendering/shading examples based on OSG around in the web. 
If you're unable to find them, I can help you to retrieve them.


In the resolving pass, you need to bind the textures you've rendered to, 
to get the normals/depths.


Beware that there will be issues concerning filtering (since depth and 
normals cannot be lineary interpolated in every case)



Cheers

Sebastian



Am 19.12.2017 um 03:10 schrieb Rômulo Cerqueira:

Hi,

is it possible to generate dynamic cubemaps (with normal mapping textures)?

...

Thank you!

Cheers,
Rômulo

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