glGetIntegerv(GL_MAX_VERTEX_UNIFORM_VECTORS,&maxVertUniformsVect);

得到1024.

比我在GLSL做的

uniform mediump vec4[1020] instance_mat

那没关系.但是使用vec3 / vec2 / float它会失败：

uniform mediump float[1030] instance_mat;          // fails
//uniform mediump vec2[1030] instance_mat;         // and this
//uniform mediump vec3[1030] instance_mat;         // and this

出现以下错误：

cannot locate suitable resource to bind variable “instance_mat”.
Possibly large array.

问题是：
GL_MAX_VERTEX_UNIFORM_VECTORS是否返回所有类型的数组,无论它们的大小是多少？我的意思是,无论这个浮动/ vec2 / vec3 / vec4 – 都算作一个
VERTEX_UNIFORM_VECTOR？

顶点着色器代码,原样如下：

#version 120
uniform mediump float[1200] instance_mat;        //mat4x3
attribute mediump float instaceIdF;             // in range 0..1000 Will be converted to int

attribute mediump vec3 vertex_;
attribute lowp vec4 color;
uniform mediump mat4 matrix;
varying lowp vec4 v_color;

void main(void)
{
    v_color = color;


        int instaceId = int(instaceIdF) * 12;
        mediump mat4 offsetMat = mat4(
                                    vec4(instance_mat[instaceId],instance_mat[instaceId+1],instance_mat[instaceId+2],0),vec4(instance_mat[instaceId+3],instance_mat[instaceId+4],instance_mat[instaceId+5],vec4(instance_mat[instaceId+6],instance_mat[instaceId+7],instance_mat[instaceId+8],vec4(instance_mat[instaceId+9],instance_mat[instaceId+10],instance_mat[instaceId+11],1)
                                 );

        /*mediump mat4 offsetMat = mat4(
                                    vec4(instance_mat[instaceId].xyz,vec4(instance_mat[instaceId+1].xyz,vec4(instance_mat[instaceId+2].xyz,vec4(instance_mat[instaceId+3].xyz,1)
                                 );*/
        gl_Position = matrix * offsetMat * vec4(vertex_,1.0);
        //gl_Position = matrix * vec4(vertex,1.0);


}