setting gamma value

[aidr0b]

How can i make set the gamma?

package net.aidrob.gammachangermod;

import net.fabricmc.api.ClientModInitializer;
import net.fabricmc.fabric.api.client.keybinding.v1.KeyBindingHelper;
import net.minecraft.client.MinecraftClient;
import net.minecraft.client.option.KeyBinding;
import org.lwjgl.glfw.GLFW;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class GammaChangerMod implements ClientModInitializer {
	private static final String gammachangermod = "gamma-changer";
	private static final String GammaChangerMod = "Gamma Changer";

	private static final KeyBinding G = new KeyBinding(
			GammaChangerMod, GLFW.GLFW_KEY_G, gammachangermod
	);
	public static final Logger LOGGER = LoggerFactory.getLogger("modid");

	@Override
	public void onInitializeClient() {
		KeyBindingHelper.registerKeyBinding(G);
	}
	public static void onKeyPressed(MinecraftClient client) {
		if (G.wasPressed()) {
			double gamma = (double) client.options.getGamma().getValue();
			gamma += 0.1;
			if (gamma > 2.0) {
				gamma = 0.0;
			}
			client.options.setGamma();
		}
	}
}

[warjort]

More like (untested code):

                        SimpleOption<Double> gammaOption = client.options.getGamma();
			double gamma = gammaOption.getValue() + 0.1;
			if (gamma > 1.0) { // the maximum, The default is 0.5 / 100% see GameOptions
				gamma = 0.0;
			}
			gammaOption.setValue(gamma);

You are also missing something that actually runs your code such as registering it as a tick event handler:

    ClientTickEvents.START_CLIENT_TICK.register(GammaChangerMod::onKeyPressed);

[aidr0b]

how can i implement this into my code?