Added capes (needs improvement)

src/client/player/LocalPlayer.cpp

@@ -107,64 +107,74 @@ static std::string extractJsonString(const std::string& json, const std::string&
     return json.substr(pos, end - pos);
 }
 
-static std::string getSkinUrlForUsername(const std::string& username) {
+static std::string getTextureUrlForUsername(const std::string& username, const std::string& textureKey) {
     if (username.empty()) {
-        LOGI("[Skin] username empty\n");
+        LOGI("[%s] username empty\n", textureKey.c_str());
         return "";
     }
 
-    LOGI("[Skin] resolving UUID for user '%s'...\n", username.c_str());
+    LOGI("[%s] resolving UUID for user '%s'...\n", textureKey.c_str(), username.c_str());
     std::vector<unsigned char> body;
     std::string apiUrl = "http://api.mojang.com/users/profiles/minecraft/" + username;
     if (!HttpClient::download(apiUrl, body)) {
-        LOGW("[Skin] failed to download UUID for %s\n", username.c_str());
+        LOGW("[%s] failed to download UUID for %s\n", textureKey.c_str(), username.c_str());
         return "";
     }
 
     std::string response(body.begin(), body.end());
     std::string uuid = extractJsonString(response, "id");
     if (uuid.empty()) {
-        LOGW("[Skin] no UUID found in Mojang response for %s\n", username.c_str());
+        LOGW("[%s] no UUID found in Mojang response for %s\n", textureKey.c_str(), username.c_str());
         return "";
     }
 
-    LOGI("[Skin] UUID=%s for user %s\n", uuid.c_str(), username.c_str());
+    LOGI("[%s] UUID=%s for user %s\n", textureKey.c_str(), uuid.c_str(), username.c_str());
 
     std::string profileUrl = "http://sessionserver.mojang.com/session/minecraft/profile/" + uuid;
     if (!HttpClient::download(profileUrl, body)) {
-        LOGW("[Skin] failed to download profile for UUID %s\n", uuid.c_str());
+        LOGW("[%s] failed to download profile for UUID %s\n", textureKey.c_str(), uuid.c_str());
         return "";
     }
 
     response.assign(body.begin(), body.end());
     std::string encoded = extractJsonString(response, "value");
     if (encoded.empty()) {
-        LOGW("[Skin] no value field in profile response for UUID %s\n", uuid.c_str());
+        LOGW("[%s] no value field in profile response for UUID %s\n", textureKey.c_str(), uuid.c_str());
         return "";
     }
 
     std::string decoded = base64Decode(encoded);
-    size_t skinPos = decoded.find("\"SKIN\"");
+
-    if (skinPos == std::string::npos) {
+    std::string searchKey = "\"" + textureKey + "\"";
-        LOGW("[Skin] no SKIN entry in decoded profile for UUID %s\n", uuid.c_str());
+    size_t texturePos = decoded.find(searchKey);
+    if (texturePos == std::string::npos) {
+        LOGW("[%s] no %s entry in decoded profile for UUID %s\n", textureKey.c_str(), textureKey.c_str(), uuid.c_str());
         return "";
     }
-    size_t urlPos = decoded.find("\"url\"", skinPos);
+    size_t urlPos = decoded.find("\"url\"", texturePos);
     if (urlPos == std::string::npos) {
-        LOGW("[Skin] no url field under SKIN for UUID %s\n", uuid.c_str());
+        LOGW("[%s] no url field under %s for UUID %s\n", textureKey.c_str(), textureKey.c_str(), uuid.c_str());
         return "";
     }
 
     // extract the URL value from the substring starting at urlPos
     std::string urlFragment = decoded.substr(urlPos);
-    std::string skinUrl = extractJsonString(urlFragment, "url");
+    std::string textureUrl = extractJsonString(urlFragment, "url");
-    if (skinUrl.empty()) {
+    if (textureUrl.empty()) {
-        LOGW("[Skin] failed to parse skin URL for UUID %s\n", uuid.c_str());
+        LOGW("[%s] failed to parse %s URL for UUID %s\n", textureKey.c_str(), textureKey.c_str(), uuid.c_str());
         return "";
     }
 
-    LOGI("[Skin] skin URL for %s: %s\n", username.c_str(), skinUrl.c_str());
+    LOGI("[%s] %s URL for %s: %s\n", textureKey.c_str(), textureKey.c_str(), username.c_str(), textureUrl.c_str());
-    return skinUrl;
+    return textureUrl;
+}
+
+static std::string getSkinUrlForUsername(const std::string& username) {
+    return getTextureUrlForUsername(username, "SKIN");
+}
+
+static std::string getCapeUrlForUsername(const std::string& username) {
+    return getTextureUrlForUsername(username, "CAPE");
 }
 
 static bool ensureDirectoryExists(const std::string& path) {
@@ -235,6 +245,51 @@ static void* fetchSkinForPlayer(void* param) {
     return NULL;
 }
 
+static void* fetchCapeForPlayer(void* param) {
+    LocalPlayer* player = (LocalPlayer*)param;
+    if (!player) return NULL;
+
+    LOGI("[Cape] starting cape download for %s\n", player->name.c_str());
+
+    const std::string cacheDir = "data/images/capes";
+    if (!ensureDirectoryExists(cacheDir)) {
+        LOGW("[Cape] failed to create cache directory %s\n", cacheDir.c_str());
+    }
+
+    std::string cacheFile = cacheDir + "/" + player->name + ".png";
+    if (fileExists(cacheFile)) {
+        LOGI("[Cape] using cached cape for %s\n", player->name.c_str());
+        player->setCapeTextureName("capes/" + player->name + ".png");
+        return NULL;
+    }
+
+    std::string capeUrl = getCapeUrlForUsername(player->name);
+    if (capeUrl.empty()) {
+        LOGW("[Cape] cape URL lookup failed for %s\n", player->name.c_str());
+        return NULL;
+    }
+
+    LOGI("[Cape] downloading cape from %s\n", capeUrl.c_str());
+    std::vector<unsigned char> capeData;
+    if (!HttpClient::download(capeUrl, capeData) || capeData.empty()) {
+        LOGW("[Cape] download failed for %s\n", capeUrl.c_str());
+        return NULL;
+    }
+
+    // Save to cache
+    FILE* fp = fopen(cacheFile.c_str(), "wb");
+    if (fp) {
+        fwrite(capeData.data(), 1, capeData.size(), fp);
+        fclose(fp);
+        LOGI("[Cape] cached cape to %s\n", cacheFile.c_str());
+    } else {
+        LOGW("[Cape] failed to write cape cache %s\n", cacheFile.c_str());
+    }
+
+    player->setCapeTextureName("capes/" + player->name + ".png");
+    return NULL;
+}
+
 //@note: doesn't work completely, since it doesn't care about stairs rotation
 static bool isJumpable(int tileId) {
 	return tileId != Tile::fence->id
@@ -265,8 +320,9 @@ LocalPlayer::LocalPlayer(Minecraft* minecraft, Level* level, User* user, int dim
 
 	if (user != NULL && !user->name.empty()) {
 		this->name = user->name;
-		// Fetch user skin from Mojang servers in the background (avoids blocking the main thread)
+		// Fetch user skin and cape from Mojang servers in the background (avoids blocking the main thread)
 		new CThread(fetchSkinForPlayer, this);
+		new CThread(fetchCapeForPlayer, this);
 	}
 }
 

src/client/renderer/entity/HumanoidMobRenderer.cpp

@@ -2,6 +2,7 @@
 #include "EntityRenderDispatcher.h"
 #include "../ItemInHandRenderer.h"
 #include "../TileRenderer.h"
+#include "../Tesselator.h"
 #include "../../model/HumanoidModel.h"
 #include "../../../world/level/tile/Tile.h"
 #include "../../../world/entity/player/Player.h"
@@ -12,7 +13,9 @@
 
 HumanoidMobRenderer::HumanoidMobRenderer(HumanoidModel* humanoidModel, float shadow)
 :	super(humanoidModel, shadow),
-	humanoidModel(humanoidModel)
+		humanoidModel(humanoidModel),
+		lastCapeXRot(0),
+		lastCapeZRot(0)
 {
 }
 
@@ -68,6 +71,143 @@ void HumanoidMobRenderer::additionalRendering(Mob* mob, float a) {
 		entityRenderDispatcher->itemInHandRenderer->renderItem(mob, item);
 		glPopMatrix2();
 	}
+
+	// Render player cape if available
+{
+    Player* player = dynamic_cast<Player*>(mob);
+    if (player) {
+        const std::string capeTex = player->getCapeTexture();
+        if (!capeTex.empty()) {
+
+            bindTexture(capeTex);
+
+            glPushMatrix2();
+
+            // Attach to player body
+            humanoidModel->body.translateTo(1 / 16.0f);
+
+            // Convert model units (pixels) to world units
+            glScalef2(1.0f / 16.0f, 1.0f / 16.0f, 1.0f / 16.0f);
+
+            // Position cape slightly down and behind the shoulders
+            glTranslatef2(0.0f, 1.0f, 2.0f);
+
+            // Java-like cape physics (interpolated inertia + body motion)
+            float pt = a;
+
+            double capeX = player->getCapePrevX() + (player->getCapeX() - player->getCapePrevX()) * pt;
+            double capeY = player->getCapePrevY() + (player->getCapeY() - player->getCapePrevY()) * pt;
+            double capeZ = player->getCapePrevZ() + (player->getCapeZ() - player->getCapePrevZ()) * pt;
+
+            double px = player->xo + (player->x - player->xo) * pt;
+            double py = player->yo + (player->y - player->yo) * pt;
+            double pz = player->zo + (player->z - player->zo) * pt;
+
+            double dx = capeX - px;
+            double dy = capeY - py;
+            double dz = capeZ - pz;
+
+            float bodyYaw = player->yBodyRotO + (player->yBodyRot - player->yBodyRotO) * pt;
+
+            float rad = bodyYaw * Mth::PI / 180.0f;
+            double sinYaw = Mth::sin(rad);
+            double cosYaw = -Mth::cos(rad);
+
+            float forward = (float)(dx * sinYaw + dz * cosYaw) * 100.0f;
+            float sideways = (float)(dx * cosYaw - dz * sinYaw) * 100.0f;
+            if (forward < 0.0f) forward = 0.0f;
+
+            float lift = (float)dy * 10.0f;
+            if (lift < -6.0f) lift = -6.0f;
+            if (lift > 32.0f) lift = 32.0f;
+
+            float walk =
+                Mth::sin((player->walkAnimPos + player->walkAnimSpeed) * 6.0f) *
+                32.0f *
+                player->walkAnimSpeed;
+
+            float capeXRot = 6.0f + forward / 2.0f + lift + walk;
+            float capeZRot = sideways / 2.0f;
+
+            // Smooth out jitter by lerping from the previous frame
+            const float smooth = 0.3f;
+            capeXRot = lastCapeXRot + (capeXRot - lastCapeXRot) * smooth;
+            capeZRot = lastCapeZRot + (capeZRot - lastCapeZRot) * smooth;
+
+            lastCapeXRot = capeXRot;
+            lastCapeZRot = capeZRot;
+
+            glRotatef2(capeXRot, 1.0f, 0.0f, 0.0f);
+            glRotatef2(capeZRot, 0.0f, 0.0f, 1.0f);
+
+            Tesselator& t = Tesselator::instance;
+            t.begin();
+
+            // UV coordinates (64x32 skin layout)
+            const float u0 = 1.0f / 64.0f;
+            const float u1 = 11.0f / 64.0f;
+            const float u2 = 12.0f / 64.0f;
+            const float u3 = 22.0f / 64.0f;
+
+            const float uL0 = 0.0f / 64.0f;
+            const float uL1 = 1.0f / 64.0f;
+
+            const float uR0 = 11.0f / 64.0f;
+            const float uR1 = 12.0f / 64.0f;
+
+            const float v0 = 0.0f / 32.0f;
+            const float v1 = 1.0f / 32.0f;
+
+            const float vTop = 1.0f / 32.0f;
+            const float vBottom = 17.0f / 32.0f;
+
+            // Cape size (10x16x1 pixels)
+            const float halfW = 5.0f;
+            const float height = 16.0f;
+            const float depth = 1.0f;
+
+            // Front
+            t.tex(u0, vTop);    t.vertex(-halfW, 0.0f, 0.0f);
+            t.tex(u1, vTop);    t.vertex(halfW, 0.0f, 0.0f);
+            t.tex(u1, vBottom); t.vertex(halfW, height, 0.0f);
+            t.tex(u0, vBottom); t.vertex(-halfW, height, 0.0f);
+
+            // Back
+            t.tex(u2, vTop);    t.vertex(halfW, 0.0f, depth);
+            t.tex(u3, vTop);    t.vertex(-halfW, 0.0f, depth);
+            t.tex(u3, vBottom); t.vertex(-halfW, height, depth);
+            t.tex(u2, vBottom); t.vertex(halfW, height, depth);
+
+            // Left
+            t.tex(uL0, vTop);    t.vertex(-halfW, 0.0f, depth);
+            t.tex(uL1, vTop);    t.vertex(-halfW, 0.0f, 0.0f);
+            t.tex(uL1, vBottom); t.vertex(-halfW, height, 0.0f);
+            t.tex(uL0, vBottom); t.vertex(-halfW, height, depth);
+
+            // Right
+            t.tex(uR0, vTop);    t.vertex(halfW, 0.0f, 0.0f);
+            t.tex(uR1, vTop);    t.vertex(halfW, 0.0f, depth);
+            t.tex(uR1, vBottom); t.vertex(halfW, height, depth);
+            t.tex(uR0, vBottom); t.vertex(halfW, height, 0.0f);
+
+            // Top
+            t.tex(u0, v0); t.vertex(-halfW, 0.0f, depth);
+            t.tex(u1, v0); t.vertex(halfW, 0.0f, depth);
+            t.tex(u1, v1); t.vertex(halfW, 0.0f, 0.0f);
+            t.tex(u0, v1); t.vertex(-halfW, 0.0f, 0.0f);
+
+            // Bottom
+            t.tex(u2, v0); t.vertex(halfW, height, 0.0f);
+            t.tex(u3, v0); t.vertex(-halfW, height, 0.0f);
+            t.tex(u3, v1); t.vertex(-halfW, height, depth);
+            t.tex(u2, v1); t.vertex(halfW, height, depth);
+
+            t.draw();
+
+            glPopMatrix2();
+        }
+    }
+}
 }
 
 void HumanoidMobRenderer::render( Entity* mob_, float x, float y, float z, float rot, float a ) {

src/client/renderer/entity/HumanoidMobRenderer.h

@@ -21,6 +21,10 @@ protected:
 
 private:
 	HumanoidModel* humanoidModel;
+
+	// Last rotation values for cape smoothing (reduces jitter)
+	float lastCapeXRot;
+	float lastCapeZRot;
 };
 
 #endif /*NET_MINECRAFT_CLIENT_RENDERER_ENTITY__HumanoidMobRenderer_H__*/

src/world/entity/Mob.cpp

@@ -29,6 +29,7 @@ Mob::Mob(Level* level)
 	invulnerableDuration(20),
 	//hasHair(false),
 	textureName("mob/char.png"),
+	capeTextureName(""),
 	allowAlpha(true),
 	modelName(""),
 	bobStrength(1),
@@ -82,6 +83,15 @@ Mob::Mob(Level* level)
 	yRot = (float) (Mth::random() * Mth::PI * 2);
 
 	this->footSize = 0.5f;
+
+	// Initialize cape inertia positions
+	xCape = x;
+	yCape = y;
+	zCape = z;
+
+	xc = xCape;
+	yc = yCape;
+	zc = zCape;
 }
 
 Mob::~Mob() {
@@ -115,6 +125,16 @@ void Mob::setTextureName(const std::string& name)
 	textureName = name;
 }
 
+std::string Mob::getCapeTexture()
+{
+	return capeTextureName;
+}
+
+void Mob::setCapeTextureName(const std::string& name)
+{
+	capeTextureName = name;
+}
+
 bool Mob::isPickable()
 {
 	return !removed;
@@ -274,6 +294,10 @@ void Mob::superTick()
 
 void Mob::tick()
 {
+	xc = xCape;
+	yc = yCape;
+	zc = zCape;
+
 	super::tick();
 
 	if (arrowCount > 0) {
@@ -378,6 +402,18 @@ void Mob::tick()
 	while (xRot - xRotO >= 180)
 		xRotO += 360;
 	animStep += walkSpeed;
+
+	// Reduce jitter by using a smaller interpolation factor (more lag, smoother motion)
+	double dxCape = x - xCape;
+	double dyCape = y - yCape;
+	double dzCape = z - zCape;
+
+	const double interp = 0.15; // small value for smoother cape motion
+	const double interpY = 0.12; // extra smoothing on vertical movement
+
+	xCape += dxCape * interp;
+	yCape += dyCape * interpY;
+	zCape += dzCape * interp;
 }
 
 void Mob::setSize( float w, float h )

src/world/entity/Mob.h

@@ -44,9 +44,14 @@ public:
     virtual std::string getTexture();
     virtual void setTextureName(const std::string& name);
 
+    // Optional player cape texture (non-null on clients when available)
+    virtual std::string getCapeTexture();
+    virtual void setCapeTextureName(const std::string& name);
+
     virtual bool isAlive();
     virtual bool isPickable();
     virtual bool isPushable();
+
 	virtual bool isShootable();
 
 	MoveControl* getMoveControl();
@@ -213,7 +218,22 @@ protected:
 	float walkingSpeed;
 	float flyingSpeed;
 
+	// Cape inertia positions
+	double xCape, yCape, zCape;
+	double xc, yc, zc;
+
+public:
+	// Cape position accessors (for renderers)
+	double getCapeX() const { return xCape; }
+	double getCapeY() const { return yCape; }
+	double getCapeZ() const { return zCape; }
+
+	double getCapePrevX() const { return xc; }
+	double getCapePrevY() const { return yc; }
+	double getCapePrevZ() const { return zc; }
+
 	std::string textureName;
+	std::string capeTextureName;
 	std::string modelName;
 	int deathScore;
 	float oRun, run;