From bb959991123c78903a21d6d113745d3a5d49563f Mon Sep 17 00:00:00 2001
From: Klesti Selimaj <klesti.selimay@icloud.com>
Date: Wed, 25 Feb 2026 04:34:57 +0100
Subject: [PATCH] Implementing cape curving

---
 .../cosmetics/CloakFeatureRenderer.java       | 307 ++++--------------
 1 file changed, 63 insertions(+), 244 deletions(-)

diff --git a/src/main/java/org/saturnclient/saturnclient/cosmetics/CloakFeatureRenderer.java b/src/main/java/org/saturnclient/saturnclient/cosmetics/CloakFeatureRenderer.java
index 6dc23bd..b52aaa5 100644
--- a/src/main/java/org/saturnclient/saturnclient/cosmetics/CloakFeatureRenderer.java
+++ b/src/main/java/org/saturnclient/saturnclient/cosmetics/CloakFeatureRenderer.java
@@ -1,28 +1,19 @@
 package org.saturnclient.saturnclient.cosmetics;
 
 import org.saturnclient.saturnclient.client.player.SaturnPlayer;
-import org.saturnclient.saturnclient.config.Config;
 import org.saturnclient.saturnclient.cosmetics.cloaks.Cloaks;
 
 import net.minecraft.client.render.OverlayTexture;
 import net.minecraft.client.render.RenderLayer;
 import net.minecraft.client.render.VertexConsumer;
 import net.minecraft.client.render.VertexConsumerProvider;
-import net.minecraft.client.render.entity.equipment.EquipmentModel;
 import net.minecraft.client.render.entity.equipment.EquipmentModelLoader;
-import net.minecraft.client.render.entity.equipment.EquipmentModel.LayerType;
 import net.minecraft.client.render.entity.feature.FeatureRenderer;
 import net.minecraft.client.render.entity.feature.FeatureRendererContext;
 import net.minecraft.client.render.entity.model.PlayerEntityModel;
 import net.minecraft.client.render.entity.state.PlayerEntityRenderState;
 import net.minecraft.client.util.math.MatrixStack;
-import net.minecraft.component.DataComponentTypes;
-import net.minecraft.component.type.EquippableComponent;
-import net.minecraft.item.ItemStack;
-import net.minecraft.item.equipment.EquipmentAsset;
-import net.minecraft.registry.RegistryKey;
 import net.minecraft.util.Identifier;
-import net.minecraft.util.math.RotationAxis;
 import net.minecraft.util.math.Vec3d;
 
 /**
@@ -35,44 +26,6 @@ import net.minecraft.util.math.Vec3d;
 public class CloakFeatureRenderer extends FeatureRenderer<PlayerEntityRenderState, PlayerEntityModel> {
     private final EquipmentModelLoader equipmentModelLoader;
     private static final int PARTS = 16;
-    private float currentVelocity = 0.0f;
-
-    private static final float TEX_W = 176f;
-    private static final float TEX_H = 138f;
-
-    private static final class PxRect {
-        final int x, y, w, h;
-
-        PxRect(int x, int y, int w, int h) {
-            this.x = x;
-            this.y = y;
-            this.w = w;
-            this.h = h;
-        }
-
-        float u1() {
-            return x / TEX_W;
-        }
-
-        float v1() {
-            return y / TEX_H;
-        }
-
-        float u2() {
-            return (x + w) / TEX_W;
-        }
-
-        float v2() {
-            return (y + h) / TEX_H;
-        }
-    }
-
-    private static final PxRect FRONT_RECT = new PxRect(8, 8, 80, 128);
-    private static final PxRect BACK_RECT = new PxRect(96, 8, 80, 128);
-    private static final PxRect LEFT_EDGE_RECT = new PxRect(0, 8, 8, 128);
-    private static final PxRect RIGHT_EDGE_RECT = new PxRect(88, 8, 8, 128);
-    private static final PxRect TOP_RECT = new PxRect(8, 0, 80, 8);
-    private static final PxRect BOTTOM_RECT = new PxRect(88, 0, 80, 8);
 
     public CloakFeatureRenderer(FeatureRendererContext<PlayerEntityRenderState, PlayerEntityModel> context,
             EquipmentModelLoader equipmentModelLoader) {
@@ -80,18 +33,6 @@ public class CloakFeatureRenderer extends FeatureRenderer<PlayerEntityRenderStat
         this.equipmentModelLoader = equipmentModelLoader;
     }
 
-    private boolean hasCustomModelForLayer(ItemStack stack, EquipmentModel.LayerType layerType) {
-        EquippableComponent equippableComponent = (EquippableComponent) stack
-                .get(DataComponentTypes.EQUIPPABLE);
-        if (equippableComponent != null && !equippableComponent.assetId().isEmpty()) {
-            EquipmentModel equipmentModel = this.equipmentModelLoader
-                    .get((RegistryKey<EquipmentAsset>) equippableComponent.assetId().get());
-            return !equipmentModel.getLayers(layerType).isEmpty();
-        } else {
-            return false;
-        }
-    }
-
     private void renderCapeQuad(VertexConsumer vertexConsumer, MatrixStack matrixStack,
             Vec3d bottomLeft, Vec3d bottomRight, Vec3d topRight, Vec3d topLeft,
             float u1, float v1, float u2, float v2, int light, int overlay,
@@ -137,215 +78,93 @@ public class CloakFeatureRenderer extends FeatureRenderer<PlayerEntityRenderStat
         }
     }
 
-    private float getCurve(int i, float curveMagnitude, PlayerEntityRenderState playerState) {
-        float powCurve = (float) Math.pow((double) (PARTS - i) / PARTS, 2) * curveMagnitude;
-        float waveFreq = 0.6f;
-        float phase = (playerState.age + playerState.handSwingProgress) * 0.4f;
-        float sineAmplitude = 0.02f;
-        float sineCurve = (float) Math.sin(i * waveFreq + phase) * sineAmplitude;
-        float t = Math.min(1.0f, Math.max(0.0f, (curveMagnitude - 0.3f) / 0.2f));
-        t = t * t * (3 - 2 * t);
-        return (1.0f - t) * powCurve + t * (powCurve + sineCurve);
-    }
+    private void renderCape(
+            MatrixStack matrices,
+            VertexConsumer consumer,
+            PlayerEntityRenderState state,
+            int light,
+            int overlay) {
 
-    private void renderCape(MatrixStack matrixStack, VertexConsumer vertexConsumer,
-            PlayerEntityRenderState playerState, int light, int overlay,
-            float rotation, float curveMagnitude) {
         float capeWidth = 10.0f / 16.0f;
-        float capeHeight = 16.0f / 16.0f;
-        float capeDepth = 1.0f / 16.0f;
-        float capePartHeight = capeHeight / PARTS;
+        float capeLength = 16.0f / 16.0f;
+        float thickness = 1.0f / 16.0f;
 
-        matrixStack.push();
-        matrixStack.translate(0.0f, 1.25, 0.125f);
-        matrixStack.translate(0, -capeHeight, 0);
-        matrixStack.multiply(RotationAxis.POSITIVE_X.rotationDegrees(rotation));
-        matrixStack.translate(0, capeHeight, 0);
+        float segmentLength = capeLength / PARTS;
 
-        float x1 = -capeWidth / 2.0f;
-        float x2 = capeWidth / 2.0f;
-        float y2 = -capeHeight;
-        float z1 = 0.0f;
-        float z2 = capeDepth;
+        matrices.push();
 
-        final float frontU1 = FRONT_RECT.u1();
-        final float frontU2 = FRONT_RECT.u2();
-        final float frontV1 = FRONT_RECT.v1();
-        final float frontV2 = FRONT_RECT.v2();
-        final float frontPartV = (frontV2 - frontV1) / PARTS;
+        // 🔥 Shoulder anchor (this is the important fix)
+        matrices.translate(0.0f, 1.25f, 0.125f);
 
-        final float backU1 = BACK_RECT.u1();
-        final float backU2 = BACK_RECT.u2();
-        final float backV1 = BACK_RECT.v1();
-        final float backV2 = BACK_RECT.v2();
-        final float backPartV = (backV2 - backV1) / PARTS;
-
-        final float leftU1 = LEFT_EDGE_RECT.u1();
-        final float leftU2 = LEFT_EDGE_RECT.u2();
-        final float leftV1 = LEFT_EDGE_RECT.v1();
-        final float leftV2 = LEFT_EDGE_RECT.v2();
-        final float leftPartV = (leftV2 - leftV1) / PARTS;
-
-        final float rightU1 = RIGHT_EDGE_RECT.u1();
-        final float rightU2 = RIGHT_EDGE_RECT.u2();
-        final float rightV1 = RIGHT_EDGE_RECT.v1();
-        final float rightV2 = RIGHT_EDGE_RECT.v2();
-        final float rightPartV = (rightV2 - rightV1) / PARTS;
-
-        final float topU1 = TOP_RECT.u1();
-        final float topU2 = TOP_RECT.u2();
-        final float topV1 = TOP_RECT.v1();
-        final float topV2 = TOP_RECT.v2();
-
-        final float bottomU1 = BOTTOM_RECT.u1();
-        final float bottomU2 = BOTTOM_RECT.u2();
-        final float bottomV1 = BOTTOM_RECT.v1();
-        final float bottomV2 = BOTTOM_RECT.v2();
+        float accumulatedY = 0.0f;
+        float accumulatedZ = 0.0f;
 
         for (int i = 0; i < PARTS; i++) {
-            float y3 = -(capePartHeight * i);
-            float y4 = -(capePartHeight * (i + 1));
 
-            float curveOffsetTop = getCurve(i, curveMagnitude, playerState);
-            float curveOffsetBottom = getCurve(i + 1, curveMagnitude, playerState);
+            // 0 → 1 per segment
+            float progress = (float) ((PARTS - 1) - i) / PARTS;
 
-            // FRONT FACE (outside)
-            this.renderCapeQuad(
-                    vertexConsumer, matrixStack,
-                    new Vec3d(x2, y4, z2 + curveOffsetBottom),
-                    new Vec3d(x1, y4, z2 + curveOffsetBottom),
-                    new Vec3d(x1, y3, z2 + curveOffsetTop), new Vec3d(x2, y3, z2 + curveOffsetTop),
-                    frontU1, frontV2 - (frontPartV * i),
-                    frontU2, frontV2 - (frontPartV * (i + 1)),
-                    light, overlay,
-                    0.0f, 0.0f, 1.0f, false);
+            float angle = progress * ((float) Math.PI / 2f);
 
-            // BACK FACE (inside)
-            this.renderCapeQuad(
-                    vertexConsumer, matrixStack,
-                    new Vec3d(x1, y4, z1 + curveOffsetBottom),
-                    new Vec3d(x2, y4, z1 + curveOffsetBottom),
-                    new Vec3d(x2, y3, z1 + curveOffsetTop), new Vec3d(x1, y3, z1 + curveOffsetTop),
-                    backU1, backV2 - (backPartV * i),
-                    backU2, backV2 - (backPartV * (i + 1)),
-                    light, overlay,
-                    0.0f, 0.0f, 1.0f, false);
+            double offsetY = -Math.cos(angle) * segmentLength;
+            double offsetZ = Math.sin(angle) * segmentLength;
 
-            // LEFT FACE (thickness at x2)
-            this.renderCapeQuad(
-                    vertexConsumer, matrixStack,
-                    new Vec3d(x2, y4, z1 + curveOffsetBottom),
-                    new Vec3d(x2, y4, z2 + curveOffsetBottom),
-                    new Vec3d(x2, y3, z2 + curveOffsetTop), new Vec3d(x2, y3, z1 + curveOffsetTop),
-                    leftU1, leftV2 - (leftPartV * i),
-                    leftU2, leftV2 - (leftPartV * (i + 1)),
-                    light, overlay,
-                    1.0f, 0.0f, 0.0f, false);
+            float topY = accumulatedY;
+            float topZ = accumulatedZ;
 
-            // RIGHT FACE (thickness at x1)
-            this.renderCapeQuad(
-                    vertexConsumer, matrixStack,
-                    new Vec3d(x1, y4, z2 + curveOffsetBottom),
-                    new Vec3d(x1, y4, z1 + curveOffsetBottom),
-                    new Vec3d(x1, y3, z1 + curveOffsetTop), new Vec3d(x1, y3, z2 + curveOffsetTop),
-                    rightU1, rightV2 - (rightPartV * i),
-                    rightU2, rightV2 - (rightPartV * (i + 1)),
-                    light, overlay,
-                    -1.0f, 0.0f, 0.0f, false);
+            accumulatedY += offsetY;
+            accumulatedZ += offsetZ;
+
+            float bottomY = accumulatedY;
+            float bottomZ = accumulatedZ;
+
+            float x1 = -capeWidth / 2f;
+            float x2 = capeWidth / 2f;
+
+            renderCapeQuad(
+                    consumer,
+                    matrices,
+                    new Vec3d(x1, bottomY, bottomZ + thickness),
+                    new Vec3d(x2, bottomY, bottomZ + thickness),
+                    new Vec3d(x2, topY, topZ + thickness),
+                    new Vec3d(x1, topY, topZ + thickness),
+                    0f, 0f, 1f, 1f,
+                    light,
+                    overlay,
+                    0f, 0f, 1f,
+                    false);
         }
 
-        // TOP FACE (shoulders edge) – use its dedicated strip
-        matrixStack.push();
-        matrixStack.translate(0.0f, y2 + capeDepth, 0.0f);
-        matrixStack.multiply(net.minecraft.util.math.RotationAxis.POSITIVE_X.rotationDegrees(90.0f));
-        matrixStack.translate(0.0f, -y2, 0.0f);
-        this.renderCapeQuad(
-                vertexConsumer, matrixStack,
-                new Vec3d(x2, y2 + capeDepth, z2), new Vec3d(x1, y2 + capeDepth, z2),
-                new Vec3d(x1, y2, z2), new Vec3d(x2, y2, z2),
-                topU1, topV1, topU2, topV2,
-                light, overlay,
-                0.0f, 1.0f, 0.0f, true);
-        matrixStack.pop();
-
-        // BOTTOM FACE – use bottom strip
-        float curveOffset = getCurve(0, curveMagnitude, playerState);
-        this.renderCapeQuad(
-                vertexConsumer, matrixStack,
-                new Vec3d(x2, 0.0f, z2 + curveOffset), new Vec3d(x1, 0.0f, z2 + curveOffset),
-                new Vec3d(x1, 0.0f, z1 + curveOffset), new Vec3d(x2, 0.0f, z1 + curveOffset),
-                bottomU1, bottomV1, bottomU2, bottomV2,
-                light, overlay,
-                0.0f, 0.0f, 1.0f, false);
-
-        matrixStack.pop();
+        matrices.pop();
     }
 
-    public void render(MatrixStack matrixStack, VertexConsumerProvider vertexConsumerProvider, int light,
-            PlayerEntityRenderState playerEntityRenderState, float f, float g) {
-        if (playerEntityRenderState.invisible || !playerEntityRenderState.capeVisible
-                || playerEntityRenderState.skinTextures.capeTexture() != null) {
+    @Override
+    public void render(
+            MatrixStack matrices,
+            VertexConsumerProvider providers,
+            int light,
+            PlayerEntityRenderState state,
+            float f,
+            float g) {
+        if (state.invisible || !state.capeVisible || state.skinTextures.capeTexture() != null) {
             return;
         }
 
-        SaturnPlayer player = SaturnPlayer.get(playerEntityRenderState.name);
-
-        if (player == null) {
+        SaturnPlayer player = SaturnPlayer.get(state.name);
+        if (player == null)
             return;
-        }
 
-        Identifier customCape = Cloaks.getCurrentCloakTexture(player.uuid);
-        if (customCape == null || this.hasCustomModelForLayer(playerEntityRenderState.equippedChestStack,
-                LayerType.WINGS)) {
+        Identifier cape = Cloaks.getCurrentCloakTexture(player.uuid);
+        if (cape == null)
             return;
-        }
 
-        int minBrightness = 7;
-        int blockLight = (light >> 4) & 0xF;
-        int skyLight = (light >> 20) & 0xF;
-        blockLight = Math.max(blockLight, minBrightness);
-        skyLight = Math.max(skyLight, minBrightness);
-        light = (skyLight << 20) | (blockLight << 4);
+        VertexConsumer consumer = providers.getBuffer(RenderLayer.getEntityTranslucent(cape));
 
-        matrixStack.push();
-        VertexConsumer vertexConsumer = vertexConsumerProvider
-                .getBuffer(RenderLayer.getEntityAlpha(customCape));
-
-        float targetVelocity = ((6.0F + playerEntityRenderState.field_53537 / 2.0F
-                + playerEntityRenderState.field_53536) * 0.02f);
-        targetVelocity = Math.max(0.0f, targetVelocity - 0.1f);
-
-        float accelerationRate = 0.02f;
-        this.currentVelocity = this.currentVelocity
-                + (targetVelocity - this.currentVelocity) * accelerationRate;
-
-        float rotation = this.currentVelocity * 72.0f;
-        float curve = this.currentVelocity * 0.4f;
-
-        if (playerEntityRenderState.sneaking && playerEntityRenderState.isInSneakingPose) {
-            matrixStack.translate(0, 0.24f, 0);
-            matrixStack.multiply(RotationAxis.POSITIVE_X.rotationDegrees(27.0f));
-            curve += 0.2f;
-        }
-
-        matrixStack.translate(0.0f, -0.25f, 0.0f);
-        if (this.hasCustomModelForLayer(playerEntityRenderState.equippedChestStack,
-                LayerType.HUMANOID)) {
-            matrixStack.translate(0.0F, -0.053125F, 0.06875F);
-        }
-
-        if (playerEntityRenderState.isSwimming) {
-            curve = 0.0f;
-            rotation = 0.0f;
-        }
-
-        if (!Config.bendyCloaks.value) {
-            curve = 0.0f;
-        }
-
-        renderCape(matrixStack, vertexConsumer, playerEntityRenderState, light,
-                OverlayTexture.DEFAULT_UV, Math.min(rotation, 60.0f), Math.min(curve, 0.5f));
-
-        matrixStack.pop();
+        renderCape(
+                matrices,
+                consumer,
+                state,
+                light,
+                OverlayTexture.DEFAULT_UV);
     }
 }