我正试图添加照明到我的一个简单的立方体的当前场景。在设置完制服之后，我从glGetError（）得到了一个1282错误

GLuint ambientHandle = glGetUniformLocation(program->getHandle(), "ambientProduct");
glUniform4fv( ambientHandle, 1, ambientProduct );
GLuint diffuseHandle = glGetUniformLocation(program->getHandle(), "diffuseProduct");
glUniform4fv( diffuseHandle, 1, diffuseProduct );
GLuint specularHandle = glGetUniformLocation(program->getHandle(), "specularProduct");
glUniform4fv( specularHandle, 1, specularProduct );
GLuint lightPosHandle = glGetUniformLocation(program->getHandle(), "lightPosition");
glUniform4fv( lightPosHandle, 1, light.position );
GLuint shinyHandle = glGetUniformLocation(program->getHandle(), "shininess");
glUniform1f( shinyHandle, materialShininess );

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以下是我的着色器：vertex.glsl

#version 120

attribute vec4 coord3d;
attribute vec3 normal3d;

// output values that will be interpretated per-fragment
varying  vec3 fN;
varying  vec3 fE;
varying  vec3 fL;

uniform vec4 lightPosition;
uniform mat4 mTransform;

void main()
{
    fN = normal3d;
    fE = coord3d.xyz;
    fL = lightPosition.xyz;

    if( lightPosition.w != 0.0 ) {
    fL = lightPosition.xyz - coord3d.xyz;
    }

    gl_Position = mTransform*coord3d;
}

型
fragment.glsl

// per-fragment interpolated values from the vertex shader
varying  vec3 fN;
varying  vec3 fL;
varying  vec3 fE;

uniform vec4 ambientProduct, diffuseProduct, specularProduct;
uniform mat4 mTransform;
uniform vec4 lightPosition;
uniform float shininess;

void main() 
{ 
    // Normalize the input lighting vectors
    vec3 N = normalize(fN);
    vec3 E = normalize(fE);
    vec3 L = normalize(fL);

    vec3 H = normalize( L + E );

    vec4 ambient = ambientProduct;

    float Kd = max(dot(L, N), 0.0);
    vec4 diffuse = Kd*diffuseProduct;

    float Ks = pow(max(dot(N, H), 0.0), shininess);
    vec4 specular = Ks*specularProduct;

    // discard the specular highlight if the light's behind the vertex
    if( dot(L, N) < 0.0 ) {
    specular = vec4(0.0, 0.0, 0.0, 1.0);
    }

    gl_FragColor = ambient + diffuse + specular;
    gl_FragColor.a = 1.0;
}

型
products和position都是一个由三个GLfloat组成的结构，而shininess是一个float。我已经检查了句柄的所有值和我传递的值，它们似乎都是有效的。有什么想法？
--编辑：我已经将其缩小到glUniform 4fv调用。它发生在每一个之后。我还仔细检查了程序->getHandle（）是否指向看起来有效的东西。
我已经检查了program->getHandle是一个有效的程序这里是所有句柄的值：程序句柄3 ambientHandle 0 diffuseHandle 1 specularHandle 5 lightPosHandle 2 shinyHandle 4
所以他们看起来都很好。为了测试，我注解掉了ambientProduct下面的行。为了清楚起见，我显式地使用这一行

glUniform4f( ambientHandle, ambientProd.x, ambientProd.y, ambientProd.z, ambientProd.w );

型
这些是执行该行时ambientProd的值。x = 0.200000003，y = 0.0，z = 0.200000003，w = 1.0
这个项目的一个合作者提出了对glUseProgram的调用。谢谢大家的帮助。