Could not find uniform:cascadeFarPlanes[2]

[mjbmon]

I have been building the codes one at a time and I am up to chapter 26, 27.1, etc.
The code is throwing an exception "Could not find uniform:cascadeFarPlanes[2]", which means that it is unable to get the uniform location of cascadeFarPlanes[2]. I put in a little debugging and it gets all of the previous uniform locations for everything up to cascadeFarPlanes[2] (e.g. cascadeFarPlanes[0], [1])

Any ideas? The normal limit for the number of uniform locations in OpenGL is 1024.

My system is a modern laptop running Linux Mint 20.1 and I cloned the book git repository just a few days ago. Also am using Java 11, with lwjgl also very recent.

[lwjglgamedev]

The example is working for me. You have mentioned that you have cloned the samples, have you modified the shaders? Have you checked the value of NUM_CASCADES constant?

[mjbmon]

I did check the value of NUM_CASCADES (was 3 in both the shader code and the java code). I added code to print out the return status from the glGetUniformLocation call as well as the values for all the uniform locations. The status was 0. The location of cascadeFarPlanes[0] was 252, [1] was 253, but [2] returned -1. I moved the line of the cascadeFarPlanes declaration in the shader code and the uniform locations changed, but the error persists. I modified the ShaderProgram.java code to ignore the error instead of throwing an exception and it still failed. But today it returns -1 for cascadeFarPlanes[2] and then it draws the house, so it can ignore the error. I am planning to put some introspection code in but that may take a while. I added code to dump some GL info: GL_VENDOR Intel GL_VERSION 4.6 (Compatibility Profile) Mesa 20.2.6 GL_RENDERER Mesa Intel(R) UHD Graphics (CML GT2) GL_MAJOR_VERSION 4 GL_MINOR_VERSION 6 GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS 16 GL_MAX_UNIFORM_LOCATIONS 81920 GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS 80 GL_MAX_COMPUTE_UNIFORM_BLOCKS 15 GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS 32 GL_MAX_COMPUTE_UNIFORM_COMPONENTS 16384 I also plan to try the code out on a different machine, but again may take some time.

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On 2022-02-16 12:58 am, ahbejarano wrote: The example is working for me. You have mentioned that you have cloned the samples, have you modified the shaders? Have you checked the value of NUM_CASCADES constant? -- Reply to this email directly, view it on GitHub [1], or unsubscribe [2]. Triage notifications on the go with GitHub Mobile for iOS [3] or Android [4]. You are receiving this because you authored the thread.Message ID: ***@***.***> Links: ------ [1] https://github.com/lwjglgamedev/lwjglbook/issues/105#issuecomment-1041213209 [2] https://github.com/notifications/unsubscribe-auth/AMRTLDTWVFCRH6ZYF75H5FDU3NKJ7ANCNFSM5OM6GEEQ [3] https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 [4] https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub

[lwjglgamedev]

If you are getting a -1 something is not working properly, it will not work in the shader. I will try to check this in a Linux VM.

[lwjglgamedev]

I've tried to setup a VM but the OpenGL drivers do not support the required version. Since I'm refactoring the source code, I will try to setup an example compatible with OpenGL version that I have to test arrays uniforms in shaders.