android，opengles 2.0中的奇怪错误调用gluniformmatrix4fv（umatrixLocation，10，false，false，矩阵，0）

Question

在某些设备（到目前为止，三星Galaxy Note 2和3 + Xperia Z1）中，我通过呼叫GluniformMatrix4Fv（UmatrixLocation，10，false，false，matrix，0）来设置转换矩阵。

错误是：

java.lang.IllegalArgumentException: length - offset < count*16 < needed
    at android.opengl.GLES20.glUniformMatrix4fv(Native Method)

这是由我的TexturesHaderProgram代码中的这一行引起的：

glUniformMatrix4fv(uMatrixLocation, 10, false, matrix, 0);

uMatrixLocation

是矩阵var的位置指针
10是转换矩阵的数量（so

matrix.length（）= 10 * 16 =160） 矩阵是float []可变性，包含所有转换数据 0是矩阵中的偏移量 我试图增加计数变量以解决它，但没有成功。 从Google生成此错误的Google源代码为：

https：//android.googlesource.com/platform/frameworks/base/+/refs/refs/heads/master/core/jni/jni/android_opengl_gles20.cpp

这些特定的行进行检查并投掷上述错误：

   _remaining = _env->GetArrayLength(value_ref) - offset;
   if (_remaining < count*16) {
       _exception = 1;
       _exceptionType = "java/lang/IllegalArgumentException";
      _exceptionMessage = "length - offset < count*16 < needed";
      goto exit;
   }

有任何线索关于这些设备为什么会丢失错误？ 这些设备上的CPP文件可以与其他设备不同吗？ ADDED 20140114 18：47

这些是矩阵变量中传递给

glUniformMatrix4fv(uMatrixLocation, 10, false, matrix, 0)

的浮点值：

my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.0
my float is: -0.8425926
my float is: 0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.098958336
my float is: -1.1574074
my float is: 0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: -0.296875
my float is: -1.1574074
my float is: -0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: -0.098958336
my float is: -1.1574074
my float is: -0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.296875
my float is: -1.1574074
my float is: 0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.9010416
my float is: -0.8240741
my float is: 0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.9010416
my float is: 0.8240741
my float is: 0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.9010416
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.5625
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 1.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: 0.0
my float is: -1.0
my float is: 0.0
my float is: 0.0
my float is: -1.1574074
my float is: 0.0
my float is: 1.0

这是我的顶点着色器：

uniform mat4 u_Matrix[10]; 

attribute lowp float a_MatrixIndex;

attribute vec4 a_Position;  
attribute vec2 a_TextureCoordinates;
attribute vec3 a_Color;

varying vec3 v_Color;
varying vec2 v_TextureCoordinates;

void main()                    
{                    
v_Color = a_Color;        
int MatrixIndex = int(a_MatrixIndex);

    v_TextureCoordinates = a_TextureCoordinates;          
    gl_Position = u_Matrix[MatrixIndex] * a_Position;    
}

如果Matrix1是包含您的浮点值的对象，则需要将其转换为如下的数组。

context.uniformMatrix4fv(loc, false, new Float32Array(matrix1.getAsArray()) );

Answer 1

现在解决了这个问题。实际上是在Android上> 4.2实施：

glUniformMatrix4fv(uMatrixLocation, count, false, matrix, 0);

必须改变。
计数变量必须与矩阵变量内的转换矩阵的“数字”完全匹配。 （正如Deathember在上面的一条评论中所暗示的）

因此，解决方案只是将计数变量传递给此函数而不是硬编码。 您仍然可以使用相同的texture_vertex代码！ 就我而言，看起来像这样： （即使我将此程序用于长度为1到9的Matrice阵列，您也可以在此处设置最高的矩阵编号）

Answer 2

uniform mat4 u_Matrix[9]; 

attribute lowp float a_MatrixIndex;

attribute vec4 a_Position;  
attribute vec2 a_TextureCoordinates;
attribute vec3 a_Color;

varying vec3 v_Color;
varying vec2 v_TextureCoordinates;

void main()                    
{                    
v_Color = a_Color;        
int MatrixIndex = int(a_MatrixIndex);

    v_TextureCoordinates = a_TextureCoordinates;          
    gl_Position = u_Matrix[MatrixIndex] * a_Position;    
}

如果您想阅读更多我测试的方式，您可以在此处查看我的博客：

android设备碎片，它终于发生了

检查yout矩阵源不会遏制一个空元素。