uniform sampler2D uTexMain;
uniform vec3 uCamera;

in vec4 aColour;
in vec2 aUv;
in vec3 aNorm;
in vec3 aCo;
in vec3 aWorldCo;

#include "common_world.glsl"
#include "motion_vectors_fs.glsl"

void main()
{
   compute_motion_vectors();

   vec3 vfrag = texture( uTexMain, aUv ).rgb;

   // Lighting
   vec3 halfview = uCamera - aWorldCo;
   float fdist = length( halfview );
   halfview /= fdist;
   fdist -= 0.08;

   vec3 qnorm = normalize(floor(aNorm*2.0)*0.5) + vec3(0.001,0.0,0.0);

   vec3 total_light = newlight_compute_ambient();
   vec3 world_light = newlight_compute_world_diffuse( qnorm );

   float world_shadow = newlight_compute_sun_shadow();
   total_light += world_light * world_shadow;

   vfrag = apply_fog( vfrag * total_light, fdist );

   float opacity = clamp( fdist*fdist, 0.0, 1.0 );
   oColour = vec4(vfrag,opacity);
}