mandom shader BS. looks fire

common/src/main/java/net/arna/jcraft/client/JCraftClient.java

@@ -116,6 +116,7 @@ public static void init() {
         ZaWarudoShaderHandler.INSTANCE.init();
         CrimsonShaderHandler.INSTANCE.init();
         EpitaphVignetteShaderHandler.INSTANCE.init();
+        MandomRewindShaderHandler.INSTANCE.init();
 
         // Renderer registration
         // JArmorRendererRegistry.registerArmorRenderers();

common/src/main/java/net/arna/jcraft/client/net/ClientPacketHandler.java

@@ -21,6 +21,7 @@
 import net.arna.jcraft.client.renderer.effects.TimeErasePredictionEffectRenderer;
 import net.arna.jcraft.client.rendering.DamageIndicatorManager;
 import net.arna.jcraft.client.rendering.handler.CrimsonShaderHandler;
+import net.arna.jcraft.client.rendering.handler.MandomRewindShaderHandler;
 import net.arna.jcraft.client.rendering.handler.ZaWarudoShaderHandler;
 import net.arna.jcraft.client.util.JClientUtils;
 import net.arna.jcraft.common.config.ConfigOption;
@@ -532,6 +533,11 @@ public static void handleShaderActivation(final @NonNull Minecraft client, final
 
 
             });
+            case MANDOM_REWIND -> client.execute(() -> {
+                MandomRewindShaderHandler mandomHandler = MandomRewindShaderHandler.INSTANCE;
+                mandomHandler.duration = duration;
+                mandomHandler.shouldRender = true;
+            });
         }
     }
 

common/src/main/java/net/arna/jcraft/client/rendering/handler/MandomRewindShaderHandler.java

@@ -0,0 +1,55 @@
+package net.arna.jcraft.client.rendering.handler;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import lombok.NonNull;
+import net.arna.jcraft.JCraft;
+import net.arna.jcraft.client.rendering.api.PostEffect;
+import net.minecraft.client.Camera;
+import net.minecraft.client.Minecraft;
+
+public class MandomRewindShaderHandler extends StandShaderHandler {
+    public static final MandomRewindShaderHandler INSTANCE = new MandomRewindShaderHandler();
+    private static final PostEffect EFFECT = new PostEffect(JCraft.id("shaders/post/mandom_rewind.json"));
+
+    public int duration = 10;
+
+    private MandomRewindShaderHandler() {
+        if (INSTANCE != null) throw new IllegalStateException("An instance already exists.");
+    }
+
+    @Override
+    public void onWorldRendered(final @NonNull PoseStack matrices, final @NonNull Camera camera, final float tickDelta, final long nanoTime) {
+        if (renderingEffect) {
+            float progress = (float) ticks / (float) duration;
+            float intensity = 1.0f - progress;
+            EFFECT.getUniform("Intensity").set(intensity);
+        }
+    }
+
+    @Override
+    public void renderEffect(final float tickDelta) {
+        if (renderingEffect) {
+            EFFECT.render(tickDelta);
+        }
+    }
+
+    @Override
+    public void tick(Minecraft client) {
+        if (!shouldRender) {
+            renderingEffect = false;
+            return;
+        }
+
+        if (!renderingEffect) {
+            ticks = 0;
+            renderingEffect = true;
+        }
+
+        ticks++;
+
+        if (ticks >= duration) {
+            renderingEffect = false;
+            shouldRender = false;
+        }
+    }
+}

common/src/main/java/net/arna/jcraft/common/attack/moves/mandom/RewindMove.java

@@ -9,9 +9,12 @@
 import net.arna.jcraft.common.entity.stand.MandomEntity;
 import net.arna.jcraft.common.marker.BlockMarker;
 import net.arna.jcraft.common.marker.EntityMarker;
+import net.arna.jcraft.common.network.s2c.ShaderActivationPacket;
 import net.arna.jcraft.common.util.JUtils;
 import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.util.ExtraCodecs;
+import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.LivingEntity;
 import org.jetbrains.annotations.NotNull;
 
@@ -45,14 +48,29 @@ public RewindMove(final int cooldown, final int windup, final int duration, fina
 
         final ServerLevel level = (ServerLevel) attacker.level();
 
+        // Send shader to all entities that were tagged in countdown
+        final List<EntityMarker> entityMarkers = countdownMove.getTimeEntityMarkers();
+        for (final EntityMarker marker : entityMarkers) {
+            Entity entity = level.getEntity(marker.id());
+            if (entity instanceof ServerPlayer taggedPlayer) {
+                ShaderActivationPacket.send(
+                        taggedPlayer,
+                        taggedPlayer,
+                        0,
+                        10,
+                        ShaderActivationPacket.Type.MANDOM_REWIND
+                );
+            }
+        }
+
         final List<BlockMarker> blockMarkers = countdownMove.getTimeBlockMarkers();
         countdownMove.setResolving(true);
         for (final BlockMarker marker : blockMarkers) {
             if (CountdownMove.BLOCK_MARKER_TYPE.shouldLoad(marker, level)) {
                 CountdownMove.BLOCK_MARKER_TYPE.load(marker, level);
             }
         }
-        final List<EntityMarker> entityMarkers = countdownMove.getTimeEntityMarkers();
+
         for (final EntityMarker marker : entityMarkers) {
             if (countdownMove.getEntityMarkerType().shouldLoad(marker, level) && JUtils.nullSafeDistanceSqr(level.getEntity(marker.id()), attacker.getUser()) <= reach * reach) {
                 countdownMove.getEntityMarkerType().load(marker, level);

common/src/main/java/net/arna/jcraft/common/network/s2c/ShaderActivationPacket.java

@@ -34,7 +34,8 @@ public static void send(ServerPlayer serverPlayerEntity, @Nullable Entity source
     public enum Type implements StringRepresentable {
         NONE("none"),
         ZA_WARUDO("za_warudo"),
-        CRIMSON("crimson");
+        CRIMSON("crimson"),
+        MANDOM_REWIND("mandom_rewind");
 
         private final String name;
 

common/src/main/resources/assets/jcraft/shaders/post/mandom_rewind.json

@@ -0,0 +1,17 @@
+{
+  "targets": [
+    "swap"
+  ],
+  "passes": [
+    {
+      "name": "jcraft:mandom_rewind",
+      "intarget": "minecraft:main",
+      "outtarget": "swap"
+    },
+    {
+      "name": "minecraft:blit",
+      "intarget": "swap",
+      "outtarget": "minecraft:main"
+    }
+  ]
+}

common/src/main/resources/assets/jcraft/shaders/program/mandom_rewind.fsh

@@ -0,0 +1,20 @@
+#version 150
+
+uniform sampler2D DiffuseSampler;
+uniform float Intensity;
+
+in vec2 texCoord;
+in vec4 vPosition;
+
+out vec4 fragColor;
+
+const vec3 pinkColor = vec3(1.0, 0.2, 0.6);
+
+void main() {
+    vec4 color = texture(DiffuseSampler, texCoord);
+
+    // Mix the original color with pink based on intensity
+    vec3 flashedColor = mix(color.rgb, pinkColor, Intensity * 0.5);
+
+    fragColor = vec4(flashedColor, color.a);
+}

common/src/main/resources/assets/jcraft/shaders/program/mandom_rewind.json

@@ -0,0 +1,42 @@
+{
+  "blend": {
+    "func": "add",
+    "srcrgb": "srcalpha",
+    "dstrgb": "1-srcalpha"
+  },
+  "vertex": "jcraft:position_getter",
+  "fragment": "jcraft:mandom_rewind",
+  "attributes": [
+    "Position"
+  ],
+  "samplers": [
+    {
+      "name": "DiffuseSampler"
+    }
+  ],
+  "uniforms": [
+    {
+      "name": "ProjMat",
+      "type": "matrix4x4",
+      "count": 16,
+      "values": [
+        1.0, 0.0, 0.0, 0.0,
+        0.0, 1.0, 0.0, 0.0,
+        0.0, 0.0, 1.0, 0.0,
+        0.0, 0.0, 0.0, 1.0
+      ]
+    },
+    {
+      "name": "OutSize",
+      "type": "float",
+      "count": 2,
+      "values": [1.0, 1.0]
+    },
+    {
+      "name": "Intensity",
+      "type": "float",
+      "count": 1,
+      "values": [1.0]
+    }
+  ]
+}