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POGLSL ES local variables crash?
 

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  1. POGLSL ES local variables crash?
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    <p>I'm trying to implement some shaders from online tutorials (lighthouse3d.com) in my OpenGL ES 2.0 engine.</p> <p>The problem is that for some reason, ANY variables declared in the scope of main() causes the entire shader to fail. for example, this fails:</p> <pre><code>void main(){ vec4 color; gl_FragColor = vec4(1.0, 0.5, 0.5, 1.0); } </code></pre> <p>but this works perfectly:</p> <pre><code>void main(){ //vec4 color; gl_FragColor = vec4(1.0, 0.5, 0.5, 1.0); } </code></pre> <p>Same thing happens with my vertex shaders.(<strong>EDIT</strong>:nvm, only seems to happen with fragment shaders) The only way to use any type of non-constant value is to use attributes, varyings, uniforms, etc. for example, this works as you would expect:</p> <pre><code>uniform sampler2D texture; varying lowp vec4 fragcol; varying lowp vec2 texco; void main(){ gl_FragColor = fragcol * texture2D(texture, texco); } </code></pre> <p>Also, I'm having a hell of a lot of trouble trying to find documentation or resources specifically about GLSL ES (or whatever this version is called). All I've been able to find is this: <a href="http://old.siggraph.org/publications/2006cn/course16/KhronosSpecs/ESLanguageSpec1.10.11.pdf" rel="nofollow">http://old.siggraph.org/publications/2006cn/course16/KhronosSpecs/ESLanguageSpec1.10.11.pdf</a></p> <p>This is all I could find related to variable declarations:</p> <blockquote> <p>[snip]There are no default types. All variable and function declarations must have a declared type, and optionally qualifiers. A variable is declared by specifying its type followed by one or more names separated by commas.[snip]</p> </blockquote> <p>And that is exactly what I did:</p> <p>declared type: <strong>vec4</strong></p> <p>followed by one or more names: <strong>color</strong>;</p> <pre><code>vec4 color </code></pre> <p>I'm clueless</p> <p><strong>EDIT:</strong> GLES20.glGetError() gives error 1282</p>
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    1. USAlexRamallo
    1. USAlexRamallo
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    1. COWhat compiler/implementation are you using?
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      1. USNicol Bolas
    2. COoops! I knew I forgot something. I'm developing on Android using the android development kit.. I should update my post
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      1. USAlexRamallo
 

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