static Uint32 color_function(int tile_x, int tile_y,
channel_t* temperature_channel,
channel_t* humidity_channel,
channel_t* spirit_channel) {
float temperature = channel_get(temperature_channel, tile_x, tile_y);
float humidity = channel_get(humidity_channel, tile_x, tile_y);
float spirit = channel_get(spirit_channel, tile_x, tile_y);
float tdev = fabs(0.5f - temperature / (float)TEMPERATURE_RANGE) / 3.0f;
float hdev = fabs(0.5f - humidity / (float)HUMIDITY_RANGE) / 3.0f;
float sdev = fabs(0.5f - spirit / (float)SPIRIT_RANGE) / 3.0f;
Uint8 R = (Uint8)((sdev * 0.5f + tdev + hdev * 1.5f) * 256);
Uint8 G = (Uint8)((0.95f - (sdev + tdev + hdev)) * 256);
Uint8 B = (Uint8)((sdev * 1.5f + tdev + hdev * 0.5f) * 256);
return SDL_MapRGBA(screen->format, R, G, B, 0xFF);
}
static char *script_schan_get(char *chan_name, char *setting)
{
channel_t *chan = channel_probe(chan_name, 0);
char *value;
if (!chan) return(NULL);
channel_get(chan, &value, setting, 0, NULL);
return(value);
}
