package com.kodari.epicfightbackpackedcompat.client.render; import com.kodari.epicfightbackpackedcompat.compat.BackpackedCompat; import com.kodari.epicfightbackpackedcompat.config.EFBConfig; import com.mojang.blaze3d.vertex.PoseStack; import com.mojang.math.Axis; import net.minecraft.client.Minecraft; import net.minecraft.client.model.EntityModel; import net.minecraft.client.model.PlayerModel; import net.minecraft.client.renderer.MultiBufferSource; import net.minecraft.client.renderer.RenderType; import net.minecraft.client.renderer.block.model.ItemTransforms; import net.minecraft.client.renderer.entity.RenderLayerParent; import net.minecraft.client.renderer.entity.layers.RenderLayer; import net.minecraft.client.renderer.texture.OverlayTexture; import net.minecraft.world.entity.player.Player; import net.minecraft.world.item.ItemStack; import java.util.Optional; /** * Renders the player's equipped backpack on their back during Epic Fight animations. * *

Epic Fight replaces Minecraft's standard entity rendering pipeline with its own * animation + mesh system, but it still calls registered render layers at the end of * the render pass. This layer detects whether the player has a backpack equipped * (via BackpackedCompat) and, if so, renders the backpack item in the "head" transform * space rotated and offset to sit on the player's back.

* *

When {@code hideBackpackDuringAttack} is enabled in the config the layer skips * rendering if Epic Fight's PlayerPatch reports an active heavy-attack animation, to * avoid mesh clipping.

*/ public class BackpackRenderLayer> extends RenderLayer { public BackpackRenderLayer(RenderLayerParent renderer) { super(renderer); } @Override public void render(PoseStack poseStack, MultiBufferSource bufferSource, int packedLight, T player, float limbSwing, float limbSwingAmount, float partialTick, float ageInTicks, float netHeadYaw, float headPitch) { if (!EFBConfig.COMMON.enableBackpackRenderLayer.get()) return; Optional backpackOpt = BackpackedCompat.getEquippedBackpack(player); if (backpackOpt.isEmpty()) return; ItemStack backpackStack = backpackOpt.get(); // Optionally skip rendering during heavy-attack animations to prevent clipping if (EFBConfig.COMMON.hideBackpackDuringAttack.get() && isPerformingHeavyAttack(player)) return; poseStack.pushPose(); // Position the backpack on the player's back: // - Translate to mid-spine (0, -0.1, 0.2 behind back in model space) // - Rotate 180° around Y so the backpack faces outward // - Scale to fit on a standard player back getParentModel().body.translateAndRotate(poseStack); poseStack.translate(0.0, -0.1, 0.2); poseStack.mulPose(Axis.YP.rotationDegrees(180.0f)); poseStack.mulPose(Axis.XP.rotationDegrees(10.0f)); // slight forward lean poseStack.scale(0.6f, 0.6f, 0.6f); Minecraft.getInstance().getItemRenderer().renderStatic( backpackStack, ItemTransforms.TransformType.FIXED, packedLight, OverlayTexture.NO_OVERLAY, poseStack, bufferSource, player.level(), player.getId() ); poseStack.popPose(); } /** * Checks Epic Fight's PlayerPatch to see if the player is mid heavy attack. * Soft-fails to false if Epic Fight's API is unavailable. */ private boolean isPerformingHeavyAttack(T player) { try { var patchOpt = player.getCapability(yesman.epicfight.world.capabilities.EpicFightCapabilities.CAPABILITY_ENTITY).resolve(); if (patchOpt.isEmpty()) return false; var patch = patchOpt.get(); if (patch instanceof yesman.epicfight.world.capabilities.entitypatch.player.PlayerPatch playerPatch) { // Epic Fight exposes the current animation via getAnimator() var animator = playerPatch.getAnimator(); if (animator == null) return false; String animName = animator.getPlayerFor(null) != null ? animator.getPlayerFor(null).getAnimation().toString() : ""; return animName.contains("heavy_attack") || animName.contains("dash_attack"); } } catch (Exception ignored) { // API mismatch between mod versions — fail safe } return false; } }