Improve movement, crouching, and add M2 animation

Movement:
- Fix speed controls: Shift=sprint (28), normal run (14), Ctrl=walk (5)
- Reduce character height for doorway clearance (eye height 1.2)
- Add working crouch (C or X key) with smooth transition (eye height 0.6)
- Jump to stand up from crouch

M2 Animation:
- Add animation time tracking per M2 instance
- Add procedural swaying animation in vertex shader
- Update animation each frame for vegetation movement

src/rendering/camera_controller.cpp

@@ -41,13 +41,15 @@ void CameraController::update(float deltaTime) {
     // Calculate movement speed based on direction and modifiers
     float speed;
     if (useWoWSpeed) {
-        // WoW-correct speeds
+        // Movement speeds (Shift = sprint, Ctrl = walk)
         if (nowBackward && !nowForward) {
             speed = WOW_BACK_SPEED;
         } else if (!uiWantsKeyboard && (input.isKeyPressed(SDL_SCANCODE_LSHIFT) || input.isKeyPressed(SDL_SCANCODE_RSHIFT))) {
-            speed = WOW_WALK_SPEED;  // Shift = walk in WoW mode
+            speed = WOW_SPRINT_SPEED;  // Shift = sprint (faster)
+        } else if (!uiWantsKeyboard && (input.isKeyPressed(SDL_SCANCODE_LCTRL) || input.isKeyPressed(SDL_SCANCODE_RCTRL))) {
+            speed = WOW_WALK_SPEED;    // Ctrl = walk (slower)
         } else {
-            speed = WOW_RUN_SPEED;
+            speed = WOW_RUN_SPEED;     // Normal run
         }
     } else {
         // Exploration mode (original behavior)
@@ -69,13 +71,18 @@ void CameraController::update(float deltaTime) {
         right = glm::normalize(right);
     }
 
-    // Toggle sit with X key (edge-triggered) — only when UI doesn't want keyboard
-    bool xDown = !uiWantsKeyboard && input.isKeyPressed(SDL_SCANCODE_X);
+    // Toggle sit/crouch with X or C key (edge-triggered) — only when UI doesn't want keyboard
+    bool xDown = !uiWantsKeyboard && (input.isKeyPressed(SDL_SCANCODE_X) || input.isKeyPressed(SDL_SCANCODE_C));
     if (xDown && !xKeyWasDown) {
         sitting = !sitting;
     }
     xKeyWasDown = xDown;
 
+    // Update eye height based on crouch state (smooth transition)
+    float targetEyeHeight = sitting ? CROUCH_EYE_HEIGHT : STAND_EYE_HEIGHT;
+    float heightLerpSpeed = 10.0f * deltaTime;
+    eyeHeight = eyeHeight + (targetEyeHeight - eyeHeight) * std::min(1.0f, heightLerpSpeed);
+
     // Calculate horizontal movement vector
     glm::vec3 movement(0.0f);
 
@@ -84,10 +91,8 @@ void CameraController::update(float deltaTime) {
     if (nowStrafeLeft) movement -= right;
     if (nowStrafeRight) movement += right;
 
-    // Stand up if any movement key is pressed while sitting
-    if (!uiWantsKeyboard && sitting && (input.isKeyPressed(SDL_SCANCODE_W) || input.isKeyPressed(SDL_SCANCODE_S) ||
-                    input.isKeyPressed(SDL_SCANCODE_A) || input.isKeyPressed(SDL_SCANCODE_D) ||
-                    input.isKeyPressed(SDL_SCANCODE_SPACE))) {
+    // Stand up if jumping while crouched
+    if (!uiWantsKeyboard && sitting && input.isKeyPressed(SDL_SCANCODE_SPACE)) {
         sitting = false;
     }
 

src/rendering/m2_renderer.cpp

@@ -37,7 +37,7 @@ bool M2Renderer::initialize(pipeline::AssetManager* assets) {
 
     LOG_INFO("Initializing M2 renderer...");
 
-    // Create M2 shader
+    // Create M2 shader with simple animation support
     const char* vertexSrc = R"(
         #version 330 core
         layout (location = 0) in vec3 aPos;
@@ -47,15 +47,27 @@ bool M2Renderer::initialize(pipeline::AssetManager* assets) {
         uniform mat4 uModel;
         uniform mat4 uView;
         uniform mat4 uProjection;
+        uniform float uTime;
+        uniform float uAnimScale;  // 0 = no animation, 1 = full animation
 
         out vec3 FragPos;
         out vec3 Normal;
         out vec2 TexCoord;
 
         void main() {
-            vec4 worldPos = uModel * vec4(aPos, 1.0);
+            vec3 pos = aPos;
+
+            // Simple swaying animation for vegetation/doodads
+            // Only animate vertices above ground level (positive Y in model space)
+            if (uAnimScale > 0.0 && pos.z > 0.5) {
+                float sway = sin(uTime * 2.0 + pos.x * 0.5 + pos.y * 0.3) * 0.1;
+                float heightFactor = clamp((pos.z - 0.5) / 3.0, 0.0, 1.0);
+                pos.x += sway * heightFactor * uAnimScale;
+                pos.y += sway * 0.5 * heightFactor * uAnimScale;
+            }
+
+            vec4 worldPos = uModel * vec4(pos, 1.0);
             FragPos = worldPos.xyz;
-            // Use mat3(uModel) directly - avoids expensive inverse() per vertex
             Normal = mat3(uModel) * aNormal;
             TexCoord = aTexCoord;
 
@@ -302,12 +314,20 @@ uint32_t M2Renderer::createInstanceWithMatrix(uint32_t modelId, const glm::mat4&
     instance.rotation = glm::vec3(0.0f);
     instance.scale = 1.0f;
     instance.modelMatrix = modelMatrix;
+    instance.animTime = static_cast<float>(rand()) / RAND_MAX * 10.0f;  // Random start time
 
     instances.push_back(instance);
 
     return instance.id;
 }
 
+void M2Renderer::update(float deltaTime) {
+    // Advance animation time for all instances
+    for (auto& instance : instances) {
+        instance.animTime += deltaTime * instance.animSpeed;
+    }
+}
+
 void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::mat4& projection) {
     (void)camera;  // unused for now
 
@@ -371,6 +391,8 @@ void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::
         }
 
         shader->setUniform("uModel", instance.modelMatrix);
+        shader->setUniform("uTime", instance.animTime);
+        shader->setUniform("uAnimScale", 1.0f);  // Enable animation for all M2s
 
         glBindVertexArray(model.vao);
 

src/rendering/renderer.cpp

@@ -569,6 +569,11 @@ void Renderer::update(float deltaTime) {
         characterRenderer->update(deltaTime);
     }
 
+    // Update M2 doodad animations
+    if (m2Renderer) {
+        m2Renderer->update(deltaTime);
+    }
+
     // Update zone detection and music
     if (zoneManager && musicManager && terrainManager && camera) {
         // First check tile-based zone