implement material roughness

client/src/main/resources/shaders/world.fsh

@@ -12,12 +12,11 @@ in vec3 vertex;
 in vec3 normal;
 in vec2 tex_coord;
 in vec4 light_color;
-in float brightness;
+in float shine;
 
 uniform vec3 cam_pos;
 uniform sampler2D tex;
 uniform vec3 specular;
-uniform float shine;
 uniform float max_vert_dist;
 uniform float max_cam_dist;
 uniform float light_factor;

client/src/main/resources/shaders/world.vsh

@@ -7,7 +7,7 @@ out vec3 vertex;
 out vec3 normal;
 out vec2 tex_coord;
 out vec4 light_color;
-out float brightness;
+out float shine;
 
 uniform mat4 model;
 uniform mat4 view;
@@ -21,7 +21,7 @@ void main() {
 	vec3 nvertex = vec3(model * vec4(pos, 1.0));
 	vertex = vec3(float(chunk_x) + pos.x, float(chunk_y) + pos.y, float(chunk_z) + pos.z);
 	normal = mat3(transpose(inverse(model))) * norm.rgb;
-	brightness = norm.a;
+	shine = norm.a * 32.0;
 	tex_coord = coord;
 	light_color = light;
 	gl_Position = projection * view * vec4(offset + nvertex, 1.0);