Add spectating

src/main/java/com/replaymod/replay/camera/CameraEntity.java

@@ -11,6 +11,9 @@ import net.minecraft.client.Minecraft;
 import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.network.NetHandlerPlayClient;
 import net.minecraft.entity.Entity;
+import net.minecraft.entity.EntityLiving;
+import net.minecraft.entity.item.EntityItemFrame;
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.stats.StatFileWriter;
 import net.minecraft.util.AxisAlignedBB;
 import net.minecraft.util.MovingObjectPosition;
@@ -214,9 +217,22 @@ public class CameraEntity extends EntityPlayerSP {
             long timePassed = now - lastControllerUpdate;
             cameraController.update(timePassed / 50f);
             lastControllerUpdate = now;
+
+            if (mc.gameSettings.keyBindAttack.isPressed() || mc.gameSettings.keyBindUseItem.isPressed()) {
+                if (canSpectate(mc.pointedEntity)) {
+                    ReplayModReplay.instance.getReplayHandler().spectateEntity(mc.pointedEntity);
+                    // Make sure we don't exit right away
+                    mc.gameSettings.keyBindSneak.pressTime = 0;
+                }
+            }
         }
     }
 
+    public boolean canSpectate(Entity e) {
+        return e != null && !e.isInvisible()
+                && (e instanceof EntityPlayer || e instanceof EntityLiving || e instanceof EntityItemFrame);
+    }
+
     @SubscribeEvent
     public void onSettingsChanged(SettingsChangedEvent event) {
         if (event.getKey() == Setting.CAMERA) {

src/main/java/com/replaymod/replay/camera/SpectatorCameraController.java

@@ -0,0 +1,38 @@
+package com.replaymod.replay.camera;
+
+import com.replaymod.replay.ReplayModReplay;
+import lombok.RequiredArgsConstructor;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.settings.KeyBinding;
+
+import java.util.Arrays;
+
+@RequiredArgsConstructor
+public class SpectatorCameraController implements CameraController {
+    private final CameraEntity camera;
+
+    @Override
+    public void update(float partialTicksPassed) {
+        Minecraft mc = Minecraft.getMinecraft();
+        if (mc.gameSettings.keyBindSneak.isPressed()) {
+            ReplayModReplay.instance.getReplayHandler().spectateCamera();
+        }
+
+        // Soak up all remaining key presses
+        for (KeyBinding binding : Arrays.asList(mc.gameSettings.keyBindAttack, mc.gameSettings.keyBindUseItem,
+                mc.gameSettings.keyBindJump, mc.gameSettings.keyBindSneak, mc.gameSettings.keyBindForward,
+                mc.gameSettings.keyBindBack, mc.gameSettings.keyBindLeft, mc.gameSettings.keyBindRight)) {
+            binding.pressTime = 0;
+        }
+    }
+
+    @Override
+    public void increaseSpeed() {
+
+    }
+
+    @Override
+    public void decreaseSpeed() {
+
+    }
+}