GLSL点光问题

Question

当我使用点光源着色器渲染我的3D场景时，我遇到了一些问题。灯光似乎与相机一起旋转，灯光也像定向光而不是点光源。我正在关注glsl点光源的本教程。 GLSL Core Tutorial – Point Lights

我的顶点着色器：

#version 150 core

in vec4 in_Position;
in vec4 in_Color;
in vec2 in_TextureCoord;
in vec3 in_Normal;

uniform mat4 projection;
uniform mat4 view;
uniform mat4 model;
uniform mat3 normal;

out Data {
    vec3 normal;
    vec3 eye;
    vec3 lightDir;
    vec2 st;
} Out;

void main(void) {
    vec4 pos = view * model * in_Position;
    vec3 norm = normal * in_Normal;
    //Light Position
    vec4 l_pos = view * model * vec4(0,1,0,1);

    Out.normal = norm;
    Out.lightDir = vec3(l_pos - pos);
    Out.st = in_TextureCoord;
    Out.eye = vec3(-pos);
    gl_Position = projection * view * model * in_Position;
}

My Fragment Shader：

#version 150 core

uniform sampler2D texture_diffuse;

in Data {
    vec3 normal;
    vec3 eye;
    vec3 lightDir;
    vec2 st;
} DataIn;

out vec4 out_Color;

void main(void) {
    vec4 diffuse = texture(texture_diffuse, DataIn.st).rgba;
    vec4 spec = vec4(0.0);
    vec4 specular = vec4(0.2,0.2,0.2,1);
    vec4 ambient = vec4(0.2,0.2,0.2,1);

    float shininess = 100;

    vec3 n = normalize(DataIn.normal);
    vec3 l = normalize(DataIn.lightDir);
    vec3 e = normalize(DataIn.eye);

    float intensity = max(dot(n,l), 0.0);
    if (intensity > 0.0) {
        vec3 h = normalize(l + e);
        float intSpec = max(dot(h,n), 0.0);
        spec = specular * pow(intSpec, shininess);
    }
    out_Color = max(intensity * diffuse + spec, ambient);
}

问题图片：