OpenGL ES 2.0 - Array of vec2

Question

I have a GLSL shader program running my iPhone app (it's a very very simple shader). I am trying to declare an array of vec2 but I'm having a lot of trouble. My shader is wrapped in a thrid party library, so unfortunately I can't get any real information about the actual error in syntax is.

My code (not working) to declare an array of vec2 is:

highp vec2 steps[5] = vec2[](
                            vec2(   0.0015625,  0.00208333333333),
                            vec2(    0.003125,  0.00416666666667),
                            vec2(     0.00625,  0.00833333333333),
                            vec2(      0.0125,  0.0166666666667),
                            vec2(       0.025,  0.0333333333333)
                            );

Does anyone have any idea how to create an array of vec2 datatypes in OpenGLES 2.0?

I can't test this right now, but wrap the array in `{};` instead of `vec2[]();` — Matisse VerDuyn, Mar 27 '12 at 20:02

score 2 · Answer 1 · answered Jul 16 '14 at 21:55

I think it's possible to create, but I am not sure it's possible to initialize it at declaration time. According to the OpenGL ES specification, http://www.khronos.org/files/opengles_shading_language.pdf

There is no mechanism for initializing arrays at declaration time from within a shader.

score -4 · Accepted Answer · answered Mar 27 '12 at 20:02

-4

highp vec2 steps[5] = {
                            vec2(   0.0015625,  0.00208333333333),
                            vec2(    0.003125,  0.00416666666667),
                            vec2(     0.00625,  0.00833333333333),
                            vec2(      0.0125,  0.0166666666667),
                            vec2(       0.025,  0.0333333333333)
                            };

answered Mar 27 '12 at 20:02

giorashc

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This isn't valid ES2 Shading Language syntax. Does it really compile for you? Doesn't for me. – kiwibonga May 12 '14 at 06:32
DOsn't compile for me either. How comes this is voted up? – Gunther Piez Dec 24 '15 at 14:51

OpenGL ES 2.0 - Array of vec2

2 Answers2