1 files changed, 67 insertions, 28 deletions
diff --git a/intermediate/surface.glsl b/intermediate/surface.glsl
index 79f5f65..ce80259 100644
--- a/intermediate/surface.glsl
+++ b/intermediate/surface.glsl
@@ -215,8 +215,32 @@ float get_shadow(Light l, vec3 wpos) {
 	return d;
 }
 
+vec3 apply_light(
+	Light l,
+	vec3 p,
+	vec2 uv,
+	vec3 base_diffuse,
+	vec3 spec_col,
+	vec3 ref,
+	vec3 light_dir,
+	vec3 view_dir,
+	vec3 nrm,
+	float cos_theta_i,
+	float atten
+) {
+	vec3 diffuse = base_diffuse * cos_theta_i;
+	vec3 spec =
+		spec_col *
+		specular_brdf(uv, ref, light_dir, view_dir, nrm) *
+		cos_theta_i;
+	float shadow = 1.0f;
+	if (l.caster_id >= 0)
+		shadow = get_shadow(l, p);
+	return (diffuse + spec) * atten * l.brightness * l.colour * shadow;
+}
+
 void main() {
-	int i;
+	int i, e;
 	vec2 uv = interpolator.uv;
 	vec3 p = interpolator.position.xyz;
 
@@ -242,34 +266,49 @@ void main() {
 	vec3 base_diffuse = diffuse_brdf(uv) * (1.0 - met);
 
 	vec3 light = 0.0.xxx;
-	for (i = 0; i < globals.light_count; i++) {
+	e = globals.sun_irange.y;
+	for (i = globals.sun_irange.x; i < e; i++) {
+		Light l = lights[i];
+		vec3 light_dir = l.pos;
+		float cos_theta_i = max(dot(nrm, light_dir), 0.0);
+		float atten = 1.0;
+		light += apply_light(
+			l,
+			p,
+			uv,
+			base_diffuse,
+			spec_col,
+			ref,
+			light_dir,
+			view_dir,
+			nrm,
+			cos_theta_i,
+			atten
+		);
+	}
+	e = globals.point_irange.y;
+	for (i = globals.point_irange.x; i < e; i++) {
 		Light l = lights[i];
-		vec3 light_dir;
-		float cos_theta_i, atten;
-		switch (l.type) {
-			case LT_SUN:
-				light_dir = l.pos;
-				cos_theta_i = max(dot(nrm, light_dir), 0.0);
-				atten = 1.0;
-				break;
-			case LT_POINT: {
-				float d;
-				light_dir = p - l.pos;
-				d = length(light_dir);
-				atten = max(d, 0.01);
-				atten = 1.0 / (atten * atten);
-				light_dir /= d;
-			} break;
-		}
-		vec3 diffuse = base_diffuse * cos_theta_i;
-		vec3 spec =
-			spec_col *
-			specular_brdf(uv, ref, light_dir, view_dir, nrm) *
-			cos_theta_i;
-		float shadow = 1.0f;
-		if (l.caster_id >= 0)
-			shadow = get_shadow(l, p);
-		light += (diffuse + spec) * atten * l.brightness * l.colour * shadow;
+		float cos_theta_i;
+		vec3 light_dir = l.pos - p;
+		float d = length(light_dir);
+		float atten = max(d, 0.01);
+		atten = 1.0 / (atten * atten);
+		light_dir /= d;
+		cos_theta_i = max(dot(nrm, light_dir), 0.0);
+		light += apply_light(
+			l,
+			p,
+			uv,
+			base_diffuse,
+			spec_col,
+			ref,
+			light_dir,
+			view_dir,
+			nrm,
+			cos_theta_i,
+			atten
+		);
 	}
 
 	colour = vec4(ambient + light, 1.0);