Directional light in worldSpace is dependent on viewMatrix - opengl

Question

I try to get my glsl shader to calculate a directional light for me but I run into the problem that the direction seems to be dependend on the viewMatrix while I want to specify it in worldSpace.
My initial idea was to just multipy the worldSpace Vector with the viewMatrix(
Vector4f dir = new Vector4f(dirLight.direction, 1);
dir.mul(window.getCamera().viewMatrix);
) in the code before setting the direction uniform but it seems that the light still changes depended on my viewMatrix, so I obviously do something wrong.
the relevant code of my shader:
//vertex shader
layout (location =0) in vec3 position;
layout (location =1) in vec2 texCoord;
layout (location =2) in vec3 vertexNormal;
layout (location=3) in vec4 jointWeights;
layout (location=4) in ivec4 jointIndices;
out vec3 gmvVertexNormal;
out vec3 gmvVertexPos;
uniform mat4 projectionMatrix;
uniform mat4 modelViewMatrix;
struct Material
{
vec3 color;
int hasTexture;
float reflectance;
};
uniform Material material;
void main()
{
vec4 mvPos = modelViewMatrix * vec4(position, 1.0);
gl_Position = vec4(position,1.0);
gmvVertexNormal = normalize(modelViewMatrix * vec4(vertexNormal, 0.0)).xyz;
gmvVertexPos = position;
}
//geometry shader
layout ( triangles ) in;
layout ( triangle_strip, max_vertices = 3) out;
uniform mat4 projectionMatrix;
uniform mat4 modelViewMatrix;
out vec3 mvVertexNormal;
out vec3 mvVertexPos;
in vec3 gmvVertexNormal[3];
in vec3 gmvVertexPos[3];
vec3 calculateTriangleNormal(){
vec3 tangent = gl_in[1].gl_Position.xyz - gl_in[0].gl_Position.xyz;
vec3 bitangent = gl_in[2].gl_Position.xyz - gl_in[0].gl_Position.xyz;
vec3 normal = cross(tangent, bitangent);
return normalize(normal);
}
void main()
{
vec4 mvPos = modelViewMatrix * vec4(gmvVertexPos[0], 1.0);
gl_Position = projectionMatrix * mvPos;
mvVertexNormal=calculateTriangleNormal();
mvVertexPos=mvPos.xyz;
EmitVertex();
mvPos = modelViewMatrix * vec4(gmvVertexPos[1], 1.0);
gl_Position = projectionMatrix * mvPos;
mvVertexNormal=calculateTriangleNormal();
mvVertexPos=mvPos.xyz;
EmitVertex();
mvPos = modelViewMatrix * vec4(gmvVertexPos[2], 1.0);
gl_Position = projectionMatrix * mvPos;
mvVertexNormal=calculateTriangleNormal();
mvVertexPos=mvPos.xyz;
EmitVertex();
EndPrimitive();
}
//fragment shader
in vec3 mvVertexNormal;
in vec3 mvVertexPos;
struct DirectionalLight {
vec3 color;
vec3 direction;
float intensity;
};
const int MAX_DIRECTIONALLIGHT = 10;
uniform int USED_DIRECTIONALLIGHTS;
uniform DirectionalLight directionalLight[MAX_DIRECTIONALLIGHT];
vec4 calcDirectionalLight(DirectionalLight light, vec3 position, vec3 normal)
{
return calcLightColor(light.color, light.intensity, position, normalize(light.direction), normal);
}
vec4 calcLightColor(vec3 light_color, float light_intensity, vec3 position, vec3 to_light_dir, vec3 normal)
{
vec4 diffuseColor = vec4(0, 0, 0, 0);
vec4 specColor = vec4(0, 0, 0, 0);
// Diffuse Light
float diffuseFactor = max(dot(normal, to_light_dir), 0.0);
diffuseColor = vec4(light_color, 1.0) * light_intensity * diffuseFactor;
// Specular Light
vec3 camera_direction = normalize(- position);
vec3 from_light_dir = -to_light_dir;
vec3 reflected_light = normalize(reflect(from_light_dir , normal));
float specularFactor = max( dot(camera_direction, reflected_light), 0.0);
specularFactor = pow(specularFactor, specularPower);
specColor = light_intensity * specularFactor * material.reflectance * vec4(light_color, 1.0);
return (diffuseColor + specColor);
}
void main()
{
vec4 totalLight = vec4(0);
//directional Light
for (int i=0; i<USED_DIRECTIONALLIGHTS; i++) {
totalLight += calcDirectionalLight(directionalLight[i], mvVertexPos, mvVertexNormal);
}
//...
fragColor = vec4(ambientLight, 1.0) + totalLight;
}
I am kinda new to shader so I dont know what to do anymore.
To specify the effect I get: the directional light that should only come from one direction (in worldSpace) comes from different directions based on the viewMatrix

Answer 1

I feel stupid now. I found the answer just after posting.
The geometry shader passes the vertexNormal directly instead of mutiplying it with the modelViewMatrix.
So the answer is this:
mvVertexNormal=normalize(modelViewMatrix * vec4(calculateTriangleNormal(), 0.0)).xyz;
instead of this:
mvVertexNormal=calculateTriangleNormal();