Opengl/GLSL Using SSBO in an array -

i got errro when using ssbo in array.

this source code in vertex shader:

#version 430 compatibility in int aid; in int bid; out vec4 vcolor; struct vertex{       vec4 position;       vec4 color; }; layout(std430) buffer shader_data{     vertex vertex[]; }mybuffers[4];      // using fixed size void main() {     vcolor = mybuffers[bid].vertex[aid].color;  // using bid locate ssbo. error here     vec4 worldpos = mybuffers[0].vertex[aid].position;     gl_position = gl_modelviewprojectionmatrix * worldpos; } 

and got error when link glsl program object.

the error is:

link error

0(17) : error c1306: cannot determine type of interface variable. need inline function

i don't understand meaning, need inline function

glsl saying must resolve @ link time buffer you're using. if substitute mybuffers[bid] mybuffers[0] (for example) link cleanly.

a solution problem using explicit if (since universe of buffers small - 4 only):

void main() {     // explicitly index buffer glsl can see @ link time:     if(bid == 0)         vcolor = mybuffers[0].vertex[aid].color;     else if(bid == 1)         vcolor = mybuffers[1].vertex[aid].color;     else if(bid == 2)         vcolor = mybuffers[2].vertex[aid].color;     else if(bid == 3)         vcolor = mybuffers[3].vertex[aid].color;      vec4 worldpos = mybuffers[0].vertex[aid].position;     gl_position = gl_modelviewprojectionmatrix * worldpos; }