Topics

1

General / OpenGL: Use depth buffer from Gbuffer in default framebuffer

« on: August 07, 2014, 03:13:20 pm »

So I am making a deferred rendering application with OpenGL. After doing the geometry and light passes I want to render some particles. But I need some depth testing on those. So what I want to do is to use the depth buffer binded to my GBuffer to do some depth testing when drawing to the default OpenGL framebuffer.

I make and bind the depth buffer/texture to the framebuffer/GBuffer like this

glGenTextures(1, &_depthTextureID);
glBindTexture(GL_TEXTURE_2D, _depthTextureID);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, _width, _height, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, _depthTextureID, 0);

My question then is: How do I bind the Gbuffer depth buffer to the default framebuffer for depth testing on the geometry pass?

2

General / Problem with uniform in GLSL shader

« on: August 05, 2014, 09:55:32 pm »

So right now I'm playing around with some OpenGL stuff. Well I'm trying to make a deferred rendering application to better learn what deferred rendering is and how it works. But I have a wierd problem. I think it may be some kind of problem with the size of different floats. Hmm but well here we go with some code.

First of all I create my textures and add them to a framebuffer.

(click to show/hide)

//Bind depth buffer to framebuffer
glGenTextures(1, &this->m_depthTexture);
glBindTexture(GL_TEXTURE_2D, this->m_depthTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, this->m_resolution.x, this->m_resolution.y, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);

glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, this->m_depthTexture, 0);

//Make and bind texture for diffuse render target
glGenTextures(1, &this->m_diffuseTexture);
glBindTexture(GL_TEXTURE_2D, this->m_diffuseTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, this->m_resolution.x, this->m_resolution.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, this->m_diffuseTexture, 0);

//Make and bind texture for position render target
glGenTextures(1, &this->m_positionTexture);
glBindTexture(GL_TEXTURE_2D, this->m_positionTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, this->m_resolution.x, this->m_resolution.y, 0, GL_RGBA, GL_HALF_FLOAT, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, this->m_positionTexture, 0);

//Make and bind texture for normals render target
glGenTextures(1, &this->m_normalsTexture);
glBindTexture(GL_TEXTURE_2D, this->m_normalsTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, this->m_resolution.x, this->m_resolution.y, 0, GL_RGBA, GL_HALF_FLOAT, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, this->m_normalsTexture, 0);;

And my fragment shader look like this.

(click to show/hide)

#version 330 core

uniform sampler2D tDiffuse;
uniform sampler2D tPosition;
uniform sampler2D tNormals;

uniform vec2 screenSize;

out vec4 color;

void main( void )
{
        //If I replace this line
        vec2 texCoords = gl_FragCoord.xy * screenSize;

        //With this line, it looks like it was supposed to
        //vec2 texCoords = gl_FragCoord.xy * vec2(1.f / 800.f, 1.f / 600.f);


    vec4 image = texture2D( tDiffuse, texCoords);
    vec4 position = texture2D( tPosition, texCoords);
    vec4 normal = texture2D( tNormals, texCoords);

    vec3 light = vec3(50,100,50);
        vec3 lightDir = light - position.xyz ;
       
        normal = normalize(normal);
        lightDir = normalize(lightDir);
    float diffuse = max(dot(normal.xyz, lightDir),0) * 0.6;

    color = (diffuse + 0.4) * image;
}

But I have problem when I'm setting "texCoords" right after main in my fragment shader. When using an uniform to pass the values. If I use the uniform I get the first and bad looking image attachment. If I just hard code the value instead of using the uniform, I get the second and good looking image attachment.

And function for setting the uniform look like so.

(click to show/hide)

void setScreenSize(const glm::vec2 &size)
{
        glUniform2f(this->m_sreenSizeLocation, 1.f / size.x, 1.f / size.y);
}

So are there any out there on this forum that may have an idea why this happens?

3

Network / Unresolved external from static library Visual Studio 2013

« on: March 18, 2014, 10:28:28 pm »

Hi!

I've upgraded my visual studio to 2013 lately and have been recompiling the libraries.
Everything have been working like a charm, untill i tried to use a class from the network library ... 

I'm linking it correctly with "sfml-network-s-d.lib", "SFML_STATIC" and so on..

I get no error compiling SFML in Visual Studio 2013.

I dont have a log on this computer, but i it's just ALOT of unresolved externals. Nothing about "__declspec(dllimport". Its like the whole static library is broken, but the library is being compiled without any error.

Anyone who have a idea whats wrong? The only idea I have right now is going back to Visual Studio 2012 and use the precompiled libraries.

UPDATE:

Here is a simple test code

#include <SFML\Network.hpp>

int main()
{
        sf::TcpSocket socket;
        return 0;
}

Here is my log

Error   1       error LNK2019: unresolved external symbol __imp__setsockopt@20 referenced in function "protected: void __thiscall sf::Socket::create(unsigned int)" (?create@Socket@sf@@IAEXI@Z)        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(Socket.obj)      Testing
Error   2       error LNK2019: unresolved external symbol __imp__socket@12 referenced in function "protected: void __thiscall sf::Socket::create(void)" (?create@Socket@sf@@IAEXXZ)     C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(Socket.obj)      Testing
Error   3       error LNK2001: unresolved external symbol __imp__socket@12      C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   4       error LNK2019: unresolved external symbol __imp__connect@12 referenced in function "public: enum sf::Socket::Status __thiscall sf::TcpSocket::connect(class sf::IpAddress const &,unsigned short,class sf::Time)" (?connect@TcpSocket@sf@@QAE?AW4Status@Socket@2@ABVIpAddress@2@GVTime@2@@Z)    C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   5       error LNK2001: unresolved external symbol __imp__connect@12     C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   6       error LNK2019: unresolved external symbol __imp__getpeername@12 referenced in function "public: class sf::IpAddress __thiscall sf::TcpSocket::getRemoteAddress(void)const " (?getRemoteAddress@TcpSocket@sf@@QBE?AVIpAddress@2@XZ)      C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   7       error LNK2019: unresolved external symbol __imp__getsockname@12 referenced in function "public: unsigned short __thiscall sf::TcpSocket::getLocalPort(void)const " (?getLocalPort@TcpSocket@sf@@QBEGXZ) C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   8       error LNK2001: unresolved external symbol __imp__getsockname@12 C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   9       error LNK2019: unresolved external symbol __imp__htonl@4 referenced in function "public: enum sf::Socket::Status __thiscall sf::TcpSocket::send(class sf::Packet &)" (?send@TcpSocket@sf@@QAE?AW4Status@Socket@2@AAVPacket@2@@Z)        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   10      error LNK2001: unresolved external symbol __imp__htonl@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   11      error LNK2001: unresolved external symbol __imp__htonl@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   12      error LNK2001: unresolved external symbol __imp__htonl@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(Packet.obj)      Testing
Error   13      error LNK2019: unresolved external symbol __imp__ntohl@4 referenced in function "public: class sf::IpAddress __thiscall sf::TcpSocket::getRemoteAddress(void)const " (?getRemoteAddress@TcpSocket@sf@@QBE?AVIpAddress@2@XZ)     C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   14      error LNK2001: unresolved external symbol __imp__ntohl@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   15      error LNK2001: unresolved external symbol __imp__ntohl@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(Packet.obj)      Testing
Error   16      error LNK2019: unresolved external symbol __imp__ntohs@4 referenced in function "public: unsigned short __thiscall sf::TcpSocket::getLocalPort(void)const " (?getLocalPort@TcpSocket@sf@@QBEGXZ)        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   17      error LNK2001: unresolved external symbol __imp__ntohs@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(Packet.obj)      Testing
Error   18      error LNK2019: unresolved external symbol __imp__recv@16 referenced in function "public: enum sf::Socket::Status __thiscall sf::TcpSocket::receive(void *,unsigned int,unsigned int &)" (?receive@TcpSocket@sf@@QAE?AW4Status@Socket@2@PAXIAAI@Z)       C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   19      error LNK2019: unresolved external symbol __imp__select@20 referenced in function "public: enum sf::Socket::Status __thiscall sf::TcpSocket::connect(class sf::IpAddress const &,unsigned short,class sf::Time)" (?connect@TcpSocket@sf@@QAE?AW4Status@Socket@2@ABVIpAddress@2@GVTime@2@@Z)     C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   20      error LNK2019: unresolved external symbol __imp__send@16 referenced in function "public: enum sf::Socket::Status __thiscall sf::TcpSocket::send(void const *,unsigned int)" (?send@TcpSocket@sf@@QAE?AW4Status@Socket@2@PBXI@Z) C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(TcpSocket.obj)   Testing
Error   21      error LNK2019: unresolved external symbol __imp__closesocket@4 referenced in function "public: static void __cdecl sf::priv::SocketImpl::close(unsigned int)" (?close@SocketImpl@priv@sf@@SAXI@Z)       C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   22      error LNK2019: unresolved external symbol __imp__ioctlsocket@12 referenced in function "public: static void __cdecl sf::priv::SocketImpl::setBlocking(unsigned int,bool)" (?setBlocking@SocketImpl@priv@sf@@SAXI_N@Z)   C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   23      error LNK2019: unresolved external symbol __imp__htons@4 referenced in function "public: static struct sockaddr_in __cdecl sf::priv::SocketImpl::createAddress(unsigned int,unsigned short)" (?createAddress@SocketImpl@priv@sf@@SA?AUsockaddr_in@@IG@Z)        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   24      error LNK2001: unresolved external symbol __imp__htons@4        C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(Packet.obj)      Testing
Error   25      error LNK2019: unresolved external symbol __imp__WSAStartup@8 referenced in function "public: __thiscall sf::priv::SocketInitializer::SocketInitializer(void)" (??0SocketInitializer@priv@sf@@QAE@XZ)   C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   26      error LNK2019: unresolved external symbol __imp__WSACleanup@0 referenced in function "public: __thiscall sf::priv::SocketInitializer::~SocketInitializer(void)" (??1SocketInitializer@priv@sf@@QAE@XZ)  C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   27      error LNK2019: unresolved external symbol __imp__WSAGetLastError@0 referenced in function "public: static enum sf::Socket::Status __cdecl sf::priv::SocketImpl::getErrorStatus(void)" (?getErrorStatus@SocketImpl@priv@sf@@SA?AW4Status@Socket@3@XZ)    C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(SocketImpl.obj)  Testing
Error   28      error LNK2019: unresolved external symbol __imp__inet_addr@4 referenced in function "unsigned int __cdecl `anonymous namespace'::resolve(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?resolve@?A0xffb3341e@@YAIABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)       C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   29      error LNK2019: unresolved external symbol __imp__inet_ntoa@4 referenced in function "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall sf::IpAddress::toString(void)const " (?toString@IpAddress@sf@@QBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ)    C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   30      error LNK2019: unresolved external symbol __imp__getaddrinfo@16 referenced in function "unsigned int __cdecl `anonymous namespace'::resolve(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?resolve@?A0xffb3341e@@YAIABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)    C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   31      error LNK2019: unresolved external symbol __imp__freeaddrinfo@4 referenced in function "unsigned int __cdecl `anonymous namespace'::resolve(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?resolve@?A0xffb3341e@@YAIABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)    C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Testing\sfml-network-s-d.lib(IpAddress.obj)   Testing
Error   32      error LNK1120: 21 unresolved externals  C:\Users\Peter Bech\documents\visual studio 2013\Projects\Testing\Debug\Testing.exe     Testing