Refactor, shader fix

res/main.glslf

@@ -7,11 +7,14 @@ out vec4 f_color;
 
 uniform sampler2D u_texture0;
 uniform vec3 u_fogColor;
+uniform float u_fogFactor;
 
 void main(){
 	vec4 tex_color = texture(u_texture0, a_texCoord);
 	//if (tex_color.a < 0.5)
 	//	discard;
 	float depth = (a_distance/256.0)*(a_distance/256.0)*256.0/6;
-	f_color = mix(a_color * tex_color, vec4(u_fogColor,1.0), min(1.0, depth/256.0/1.0f));
+	float alpha = a_color.a * tex_color.a;
+	f_color = mix(a_color * tex_color, vec4(u_fogColor,1.0), min(1.0, depth*u_fogFactor));
+	f_color.a = alpha;
 }