Jogl Shader programming

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日久生厌
日久生厌 2020-12-29 15:14

I just started Shader programming(GLSL) and created a few with RenderMonkey. Now I want to use this Shaders in my java code. Are there any simple examples of how I do that?<

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  • 2020-12-29 15:27

    I have found a very simple example

    int v = gl.glCreateShader(GL.GL_VERTEX_SHADER);
    int f = gl.glCreateShader(GL.GL_FRAGMENT_SHADER);
    
    BufferedReader brv = new BufferedReader(new FileReader("vertexshader.glsl"));
    String vsrc = "";
    String line;
    while ((line=brv.readLine()) != null) {
      vsrc += line + "\n";
    }
    gl.glShaderSource(v, 1, vsrc, (int[])null);
    gl.glCompileShader(v);
    
    BufferedReader brf = new BufferedReader(new FileReader("fragmentshader.glsl"));
    String fsrc = "";
    String line;
    while ((line=brf.readLine()) != null) {
      fsrc += line + "\n";
    }
    gl.glShaderSource(f, 1, fsrc, (int[])null);
    gl.glCompileShader(f);
    
    int shaderprogram = gl.glCreateProgram();
    gl.glAttachShader(shaderprogram, v);
    gl.glAttachShader(shaderprogram, f);
    gl.glLinkProgram(shaderprogram);
    gl.glValidateProgram(shaderprogram);
    
    gl.glUseProgram(shaderprogram); 
    
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  • 2020-12-29 15:28

    I don't have any myself, but if I have a problem along these lines I have often found the best place for 3D programming and Java advice is over at JavaGaming.org - I've not been there for a while, but it was always a helpful and knowledgeable community.

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  • 2020-12-29 15:34

    You could look at ogre4j, a Java wrapper/port of the popular open-source Ogre3D graphics engine. It might be a bit heavy-weight for your needs, but for a proper 3D project, worth a look for sure.

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  • 2020-12-29 15:35

    The new version of Jogl adds as an Utility shader loading/compiling and Uniform setting/getting calls. Have a look at the API for the selection of methods.

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