Explosion-Overhaul/com/vinlanx/explosionoverhaul/client/CameraShakeConcussionEffect.java

/*
 * Decompiled with CFR 0.152.
 */
package com.vinlanx.explosionoverhaul.client;

import net.minecraft.client.Minecraft;
import net.minecraft.client.player.LocalPlayer;
import net.minecraft.util.Mth;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(value=Dist.CLIENT)
public class CameraShakeConcussionEffect {
    private static final int FADE_IN_TICKS = 40;
    private static final int FADE_OUT_TICKS = 40;
    private static Phase phase = Phase.IDLE;
    private static int ticksInPhase = 0;
    private static int holdTicks = 0;
    private static float currentIntensity = 0.0f;
    private static float targetIntensity = 0.0f;
    private static float lastYawOffset = 0.0f;
    private static float lastPitchOffset = 0.0f;

    public static boolean isActive() {
        return phase != Phase.IDLE;
    }

    public static void start(int seconds, float intensity) {
        int newHoldTicks = Mth.m_14045_((int)seconds, (int)1, (int)100) * 20;
        float newIntensity = Math.max(0.0f, intensity);
        if (phase != Phase.IDLE) {
            targetIntensity += newIntensity;
            holdTicks = Math.min(2000, holdTicks + newHoldTicks);
            if (phase == Phase.FADE_OUT) {
                phase = Phase.HOLD;
                ticksInPhase = 0;
            }
        } else {
            targetIntensity = newIntensity;
            holdTicks = newHoldTicks;
            ticksInPhase = 0;
            phase = Phase.FADE_IN;
            currentIntensity = 0.0f;
        }
    }

    public static void onClientTick() {
        Minecraft mc = Minecraft.m_91087_();
        if (mc.m_91104_()) {
            return;
        }
        LocalPlayer player = mc.f_91074_;
        if (player == null) {
            CameraShakeConcussionEffect.stop();
            return;
        }
        player.m_19884_((double)(-lastYawOffset), (double)(-lastPitchOffset));
        lastYawOffset = 0.0f;
        lastPitchOffset = 0.0f;
        if (phase == Phase.IDLE) {
            return;
        }
        ++ticksInPhase;
        switch (phase) {
            case FADE_IN: {
                float t = (float)ticksInPhase / 40.0f;
                currentIntensity = CameraShakeConcussionEffect.easeInOutCubic(t) * targetIntensity;
                if (ticksInPhase < 40) break;
                phase = Phase.HOLD;
                ticksInPhase = 0;
                break;
            }
            case HOLD: {
                currentIntensity = targetIntensity;
                if (ticksInPhase < holdTicks) break;
                phase = Phase.FADE_OUT;
                ticksInPhase = 0;
                break;
            }
            case FADE_OUT: {
                float t = (float)ticksInPhase / 40.0f;
                currentIntensity = targetIntensity * CameraShakeConcussionEffect.easeInOutCubic(1.0f - t);
                if (ticksInPhase < 40) break;
                CameraShakeConcussionEffect.stop();
                return;
            }
        }
        if (currentIntensity > 0.0f) {
            CameraShakeConcussionEffect.applySway(player, (float)player.f_19797_ + mc.m_91296_());
        }
    }

    private static void applySway(LocalPlayer player, float totalTicks) {
        float horizontalSway = Mth.m_14031_((float)(totalTicks * 0.04f)) * 1.5f + Mth.m_14031_((float)(totalTicks * 0.025f)) * 1.0f;
        float verticalSway = Mth.m_14089_((float)(totalTicks * 0.035f)) * 0.8f + Mth.m_14031_((float)(totalTicks * 0.015f)) * 0.5f;
        float yawChange = horizontalSway * currentIntensity * 50.0f;
        float pitchChange = verticalSway * currentIntensity * 30.0f;
        player.m_19884_((double)yawChange, (double)pitchChange);
        lastYawOffset = yawChange;
        lastPitchOffset = pitchChange;
    }

    public static void stop() {
        phase = Phase.IDLE;
        ticksInPhase = 0;
        holdTicks = 0;
        currentIntensity = 0.0f;
        targetIntensity = 0.0f;
        lastYawOffset = 0.0f;
        lastPitchOffset = 0.0f;
    }

    private static float easeInOutCubic(float t) {
        return t < 0.5f ? 4.0f * t * t * t : 1.0f - (float)Math.pow(-2.0f * t + 2.0f, 3.0) / 2.0f;
    }

    private static enum Phase {
        IDLE,
        FADE_IN,
        HOLD,
        FADE_OUT;

    }
}