OpenGL not drawing nearest fragment to the camera











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1
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I have a scene with a teapot mesh in it.
I'm using a framgment shader to light it using a source of light whose value is equal to 10.



When the scene is rendered to the default framebuffer, everything seems to be fine. ok



But, if it's rendered in a custom framebuffer, the result looks like this :ko



OpenGL seems to prefer triangles defined "at the end of" the mesh.



I want the framebuffer to contain 16bits floats so I can store values larger than 1.0.



Sorry for my English.






opengl mesh fragment-shader framebuffer







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  • 1




    Probably you don't attach a depth buffer to the framebuffer.
    – Rabbid76
    Nov 10 at 20:06










  • Oh. You're probably right. I didn't think of that. I'll do it right now.
    – Elirovi
    Nov 10 at 20:11










  • @Rabbid76, I just added and attached a depth renderBuffer to my framebuffer and now I'm not getting any result
    – Elirovi
    Nov 10 at 20:19










  • Ok I just found out what I did wrong : I forgot to clear the depth buffer in the drawcall using glClear(GL_COLOR_BUFFER_BIT | **GL_DEPTH_BUFFER_BIT**);
    – Elirovi
    Nov 10 at 20:21






  • 1




    Possibly someone would've pointed that out, if you would've added any code to the question. Please read How to create a Minimal, Complete, and Verifiable example.
    – Rabbid76
    Nov 10 at 20:24

















up vote
1
down vote

favorite












I have a scene with a teapot mesh in it.
I'm using a framgment shader to light it using a source of light whose value is equal to 10.



When the scene is rendered to the default framebuffer, everything seems to be fine. ok



But, if it's rendered in a custom framebuffer, the result looks like this :ko



OpenGL seems to prefer triangles defined "at the end of" the mesh.



I want the framebuffer to contain 16bits floats so I can store values larger than 1.0.



Sorry for my English.






opengl mesh fragment-shader framebuffer







share|improve this question


















  • 1




    Probably you don't attach a depth buffer to the framebuffer.
    – Rabbid76
    Nov 10 at 20:06










  • Oh. You're probably right. I didn't think of that. I'll do it right now.
    – Elirovi
    Nov 10 at 20:11










  • @Rabbid76, I just added and attached a depth renderBuffer to my framebuffer and now I'm not getting any result
    – Elirovi
    Nov 10 at 20:19










  • Ok I just found out what I did wrong : I forgot to clear the depth buffer in the drawcall using glClear(GL_COLOR_BUFFER_BIT | **GL_DEPTH_BUFFER_BIT**);
    – Elirovi
    Nov 10 at 20:21






  • 1




    Possibly someone would've pointed that out, if you would've added any code to the question. Please read How to create a Minimal, Complete, and Verifiable example.
    – Rabbid76
    Nov 10 at 20:24















up vote
1
down vote

favorite









up vote
1
down vote

favorite











I have a scene with a teapot mesh in it.
I'm using a framgment shader to light it using a source of light whose value is equal to 10.



When the scene is rendered to the default framebuffer, everything seems to be fine. ok



But, if it's rendered in a custom framebuffer, the result looks like this :ko



OpenGL seems to prefer triangles defined "at the end of" the mesh.



I want the framebuffer to contain 16bits floats so I can store values larger than 1.0.



Sorry for my English.






opengl mesh fragment-shader framebuffer







share|improve this question













I have a scene with a teapot mesh in it.
I'm using a framgment shader to light it using a source of light whose value is equal to 10.



When the scene is rendered to the default framebuffer, everything seems to be fine. ok



But, if it's rendered in a custom framebuffer, the result looks like this :ko



OpenGL seems to prefer triangles defined "at the end of" the mesh.



I want the framebuffer to contain 16bits floats so I can store values larger than 1.0.



Sorry for my English.






opengl mesh fragment-shader framebuffer




opengl mesh fragment-shader framebuffer






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 10 at 19:50









Elirovi

1048




1048








  • 1




    Probably you don't attach a depth buffer to the framebuffer.
    – Rabbid76
    Nov 10 at 20:06










  • Oh. You're probably right. I didn't think of that. I'll do it right now.
    – Elirovi
    Nov 10 at 20:11










  • @Rabbid76, I just added and attached a depth renderBuffer to my framebuffer and now I'm not getting any result
    – Elirovi
    Nov 10 at 20:19










  • Ok I just found out what I did wrong : I forgot to clear the depth buffer in the drawcall using glClear(GL_COLOR_BUFFER_BIT | **GL_DEPTH_BUFFER_BIT**);
    – Elirovi
    Nov 10 at 20:21






  • 1




    Possibly someone would've pointed that out, if you would've added any code to the question. Please read How to create a Minimal, Complete, and Verifiable example.
    – Rabbid76
    Nov 10 at 20:24
















  • 1




    Probably you don't attach a depth buffer to the framebuffer.
    – Rabbid76
    Nov 10 at 20:06










  • Oh. You're probably right. I didn't think of that. I'll do it right now.
    – Elirovi
    Nov 10 at 20:11










  • @Rabbid76, I just added and attached a depth renderBuffer to my framebuffer and now I'm not getting any result
    – Elirovi
    Nov 10 at 20:19










  • Ok I just found out what I did wrong : I forgot to clear the depth buffer in the drawcall using glClear(GL_COLOR_BUFFER_BIT | **GL_DEPTH_BUFFER_BIT**);
    – Elirovi
    Nov 10 at 20:21






  • 1




    Possibly someone would've pointed that out, if you would've added any code to the question. Please read How to create a Minimal, Complete, and Verifiable example.
    – Rabbid76
    Nov 10 at 20:24










1




1




Probably you don't attach a depth buffer to the framebuffer.
– Rabbid76
Nov 10 at 20:06




Probably you don't attach a depth buffer to the framebuffer.
– Rabbid76
Nov 10 at 20:06












Oh. You're probably right. I didn't think of that. I'll do it right now.
– Elirovi
Nov 10 at 20:11




Oh. You're probably right. I didn't think of that. I'll do it right now.
– Elirovi
Nov 10 at 20:11












@Rabbid76, I just added and attached a depth renderBuffer to my framebuffer and now I'm not getting any result
– Elirovi
Nov 10 at 20:19




@Rabbid76, I just added and attached a depth renderBuffer to my framebuffer and now I'm not getting any result
– Elirovi
Nov 10 at 20:19












Ok I just found out what I did wrong : I forgot to clear the depth buffer in the drawcall using glClear(GL_COLOR_BUFFER_BIT | **GL_DEPTH_BUFFER_BIT**);
– Elirovi
Nov 10 at 20:21




Ok I just found out what I did wrong : I forgot to clear the depth buffer in the drawcall using glClear(GL_COLOR_BUFFER_BIT | **GL_DEPTH_BUFFER_BIT**);
– Elirovi
Nov 10 at 20:21




1




1




Possibly someone would've pointed that out, if you would've added any code to the question. Please read How to create a Minimal, Complete, and Verifiable example.
– Rabbid76
Nov 10 at 20:24






Possibly someone would've pointed that out, if you would've added any code to the question. Please read How to create a Minimal, Complete, and Verifiable example.
– Rabbid76
Nov 10 at 20:24














1 Answer
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I forgot to add a depth renderBuffer and clear it using glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



To do so, add :



GLuint rboDepth;

glGenRenderbuffers(1, &rboDepth);

glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);

glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width(), height());

glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);


to your framebuffer implementation while it's bound.






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    up vote
    1
    down vote



    accepted










    I forgot to add a depth renderBuffer and clear it using glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



    To do so, add :



    GLuint rboDepth;
    
glGenRenderbuffers(1, &rboDepth);
    
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
    
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width(), height());
    
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);


    to your framebuffer implementation while it's bound.






    share|improve this answer

























      up vote
      1
      down vote



      accepted










      I forgot to add a depth renderBuffer and clear it using glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



      To do so, add :



      GLuint rboDepth;
      
glGenRenderbuffers(1, &rboDepth);
      
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
      
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width(), height());
      
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);


      to your framebuffer implementation while it's bound.






      share|improve this answer























        up vote
        1
        down vote



        accepted







        up vote
        1
        down vote



        accepted






        I forgot to add a depth renderBuffer and clear it using glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



        To do so, add :



        GLuint rboDepth;
        
glGenRenderbuffers(1, &rboDepth);
        
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
        
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width(), height());
        
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);


        to your framebuffer implementation while it's bound.






        share|improve this answer












        I forgot to add a depth renderBuffer and clear it using glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



        To do so, add :



        GLuint rboDepth;
        
glGenRenderbuffers(1, &rboDepth);
        
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
        
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width(), height());
        
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);


        to your framebuffer implementation while it's bound.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 10 at 20:29









        Elirovi

        1048




        1048






























             

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