extern u8 light_decode_table[LIGHT_MAX+1];
+// 0 <= light <= LIGHT_SUN
+// 0 <= return value <= 255
inline u8 decode_light(u8 light)
{
- if(light == LIGHT_SUN)
- return light_decode_table[LIGHT_MAX];
-
if(light > LIGHT_MAX)
light = LIGHT_MAX;
return light_decode_table[light];
}
+// 0 <= daylight_factor <= 1000
+// 0 <= lightday, lightnight <= LIGHT_SUN
+// 0 <= return value <= LIGHT_SUN
+inline u8 blend_light(u32 daylight_factor, u8 lightday, u8 lightnight)
+{
+ u32 c = 1000;
+ u32 l = ((daylight_factor * lightday + (c-daylight_factor) * lightnight))/c;
+ if(l > LIGHT_SUN)
+ l = LIGHT_SUN;
+ return l;
+}
+
#endif