I have a problem with lighting calculations. I am rotating the camera around a cube which was supposed to be illuminated by the light but the resulting lighting is very weird. Check out the image above, fragment shader and vertex shader below.
//Vertex shader
#version 330 core
layout (location = 0) in vec3 pos;
layout (location = 1) in vec3 norm;
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;
uniform vec3 lightPos;
out vec3 ourNormal;
out vec3 fragPos;
out vec3 ourLightPos;
void main()
{
gl_Position = projection*view*model*vec4(pos,1.0);
fragPos = vec3(view * model * vec4(pos, 1.0f));
ourNormal = mat3(transpose(inverse(view * model))) * norm;
ourLightPos = vec3(view * vec4(lightPos, 1.0));
}
//fragment shader
#version 330 core
//Output variables
out vec4 finalColor;
//Input variables
in vec3 ourNormal;
in vec3 fragPos;
in vec3 ourLightPos;
//Uniform variables
struct Material
{
vec3 ambient;
vec3 diffuse;
vec3 specular;
float shininess;
};
struct Light
{
vec3 ambient;
vec3 diffuse;
vec3 specular;
};
uniform Light light;
uniform Material material;
uniform vec3 viewPos;
void main()
{
//Ambient
vec3 ambient = light.ambient*material.ambient;
//Diffuse
vec3 normal = normalize(ourNormal);
vec3 lightDir = normalize(ourLightPos - fragPos);
float diffuseStrength = max(dot(lightDir,normal),0.0);
vec3 diffuse = light.diffuse*(diffuseStrength*material.diffuse);
//Specular
vec3 viewDir = normalize(viewPos - fragPos);
vec3 reflectDir = reflect(-lightDir,normal);
float specularStrength = pow(max(dot(viewDir,reflectDir),0.0),material.shininess);
vec3 specular = light.specular * (specularStrength*material.specular);
//Last step
vec3 result = (ambient+diffuse+specular);
finalColor = vec4(result,1.0);
}
As you can see, I transformed all the positions, normals and light source position in view space, i.e camera space, but I don't know why it's not working.
