git-svn-id: svn://db.shs.com.ru/libs@677 a8b55f48-bf90-11e4-a774-851b48703e85

qglengine/shaders/ds_light.glsl

@@ -19,6 +19,10 @@ uniform float z_near;
 uniform sampler2D tex_0, tex_1, tex_2, tex_3, tex_4;
 uniform int lights_start, lights_count;
 
+uniform vec4 fog_color = vec4(0.5, 0.5, 0.5, 1);
+uniform vec3 fog_decay = vec3(0, 0.1, 0); // [^0, ^1, ^2]
+uniform float fog_density = 0;
+
 const vec3 luma = vec3(0.299, 0.587, 0.114);
 const float _pe = 2.4e-7;
 
@@ -93,7 +97,7 @@ void main(void) {
 	vec4 v1 = texelFetch(tex_1, tc, 0);
 	float z = v1.w;
 	if (z == 1.) {
-		qgl_FragColor = vec4(0);
+		qgl_FragColor = vec4(fog_color.rgb, 0);
 		return;
 	}
 	vec4 v0 = texelFetch(tex_0, tc, 0),
@@ -124,7 +128,12 @@ void main(void) {
 	si = vec3(0.);
 	for (int i = 0; i < lights_count; ++i)
 		calcLight(lights_start + i, normal, v);
+	vec3 res_col = max(vec3(0), li * diffuse + si * specular + emission);
 	
-	qgl_FragColor = vec4(max(vec3(0), li * diffuse + si * specular + emission), alpha);
-	//qgl_FragColor. = vec3(alpha);
+	float plen = length(pos.xyz);
+	float fog = clamp(dot(fog_decay, vec3(1, plen, plen*plen)) * fog_color.a * fog_density, 0, 1);
+	res_col = mix(res_col, fog_color.rgb, fog);
+	
+	qgl_FragColor = vec4(res_col, alpha);
+	//qgl_FragColor.rgb = vec3(z);
 }