GLSL array of struct members locations

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By : Pororoca

Date : January 12 2021, 07:00 PM

it helps some times Your first example uniform struct MyStruct is a raw uniform whose member locations are arbitrary and must be queried:

code :

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GLSL - Uniform locations in GLSL 1.2 and depth testing in shaders

By : jisun

Date : March 29 2020, 07:55 AM

This might help you On OpenGL 3.3+ you have VAOs, when you use them, you do bind VBOs to it and you can define attributes in a custom order : http://www.opengl.org/sdk/docs/man3/xhtml/glEnableVertexAttribArray.xml (remember that attributes must be contiguous)
A nice/easy implementation of this can be found on XNA : VertexDeclaration, you might want to see all the Vertex* types as well.

GLSL struct uniform locations return -1

By : Dušan Koutník

Date : March 29 2020, 07:55 AM

To fix the issue you can do Uniforms that are not used in your shader code will often be optimized out. These uniforms are not considered "active" and therefore have a location of -1.

How to define different qualifiers for the different struct members in GLSL?

By : Calin

Date : March 29 2020, 07:55 AM

Hope that helps Reference for the GLSL ES.
Programming a GPU through a shading language is not the same as programming a CPU with C, a GPU is not a CPU and GLSL is not C: some keywords and constructs are missing.

POD struct (members of same type): are members in contiguous memory locations?

By : user3161791

Date : March 29 2020, 07:55 AM

Hope that helps
Is it safe to assume that x, y, and z are in contiguous memory locations?

code :

template <typename T>
struct Vector3d { T components[3]; };

Initializing or assigning struct members of variable array directly, with reference to named struct members, in C?

By : user3549239

Date : March 29 2020, 07:55 AM

hope this fix your issue If you were to for example create an array of int you could initialize it like this:

code :

int arr[3] = { 3, 4, 5 };

struct textureParams textures[texturesCount] = {
    {
        .textureFormat = textureFormat,
        .textureAccess = textureAccess,
        .srcrect = {.x = 0, .y = 0, .w = 50, .h = 50},
        .dstrect = {.x = 0, .y = 500, .w = 50, .h = 50},
        .r = 255,
        .g = 0,
        .b = 0,
        .a = 0,
    },
    {
        .textureFormat = textureFormat,
        .textureAccess = textureAccess,
        .srcrect = {.x = 0, .y = 0, .w = 20, .h = 20},
        .dstrect = {.x = 10, .y = 100, .w = 20, .h = 20},
        .r = 0,
        .g = 255,
        .b = 0,
        .a = 0,
    }
};