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POd opengl custom vs fixed-pipeline matrix weirdness
 

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  1. POd opengl custom vs fixed-pipeline matrix weirdness
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    <p>I have recently been working on shifting over to handling my matrix controls myself, so that my engine will be ready to shift over to a 4.0+ context, <em>though currently I am using a 2.1 context with Derelict</em>. I have tried all kinds of matrix calcs and nothing seems to work with my shader(nothing on screen except for FPS counter unless I switch back to fixed-pipe, or if I switch the vs to set gl_Position = vec4(position,1.0);). Even when I grab the values that OpenGL normally sets and put them into it I get the same. </p> <p>I added print out of both my matrix and the one that the fixed-pipeline returned to the draw calls and the output is IDENTICAL. I've already checked and double checked my shader code, so I'm pretty lost as to from where this bug is coming.</p> <p><em>This happens on both OSX and Windows. I have a <code>glGetError()</code> check every draw call and am not getting any errors. Shaders link and validate with out warning or error.</em></p> <h1>code for uniform loading:</h1> <pre><code>glUniformMatrix4fv(ModelViewLoc,1, GL_FALSE ,modelview); glUniformMatrix4fv(ProjectionLoc,1, GL_FALSE ,projection); </code></pre> <h1>Vertex Shader:</h1> <pre><code>#version 120 //layout(location = 0) in vec3 position; attribute vec3 position; uniform mat4 ModelView; uniform mat4 Projection; void main() { mat4 mvp = Projection*ModelView; gl_Position = mvp * vec4(position,1.0); //gl_Position = vec4(position,1.0); } </code></pre> <h1>Fragment Shader:</h1> <pre><code>#version 120 uniform float slider; void main() { vec4 diffuse = vec4(vec3(slider),1.0); gl_FragColor = diffuse; } </code></pre> <h1>debug output:</h1> <p>Model 1:</p> <pre><code>OpenGL ModelView: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -2, -2, -8, 1] mine: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -2, -2, -8, 1] OpenGL Projection:[1.30323, 0, 0, 0, 0, 1.30323, 0, 0, 0, 0, -1.0002, -1, 0, 0, -0.20002, 0] mine: [1.30323, 0, 0, 0, 0, 1.30323, 0, 0, 0, 0, -1.0002, -1, 0, 0, -0.20002, 0] </code></pre> <p>Model 2:</p> <pre><code>OpenGL ModelView: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 2, 2, -8, 1] mine: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 2, 2, -8, 1] OpenGL Projection:[1.30323, 0, 0, 0, 0, 1.30323, 0, 0, 0, 0, -1.0002, -1, 0, 0, -0.20002, 0] mine: [1.30323, 0, 0, 0, 0, 1.30323, 0, 0, 0, 0, -1.0002, -1, 0, 0, -0.20002, 0] </code></pre> <p>*<em>UPDATE</em>*I have released the code for matrix lib @ github.com/mclark4386/DMath See anything there?^^;</p>
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    1. USMatthew Clark
    1. USMatthew Clark
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      1. POd opengl custom vs fixed-pipeline matrix weirdness
      1. USluke
      1. VTFavorite
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      1. VTUpMod
    1. COOS? GL implementation vendor? Driver version?
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      1. POd opengl custom vs fixed-pipeline matrix weirdness
      1. USgenpfault
    2. COHard to say without seeing more code. Are you calling `glGetError()` to make sure nothing funky is going on?
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      1. POd opengl custom vs fixed-pipeline matrix weirdness
      1. USPeter Alexander
    3. COI am indeed calling it every draw call. What part(s) of the code do you need to see? Be happy to give more info, I just didn't want to overload the post initially.
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      1. POd opengl custom vs fixed-pipeline matrix weirdness
      1. USMatthew Clark
 

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