Added EntityViewRenderEvent#FOVModifier

Enables mods to modify raw FOV directly.
Avoids modifier limit from FOVUpdateEvent.
Aware of blocks which are needed for fov change related with materials.

patches/minecraft/net/minecraft/client/renderer/EntityRenderer.java.patch

@@ -17,6 +17,15 @@
                              {
                                  if (d2 == 0.0D)
                                  {
+@@ -512,7 +513,7 @@
+                 f = f * 60.0F / 70.0F;
+             }
+ 
+-            return f;
++            return net.minecraftforge.client.ForgeHooksClient.getFOVModifier(this, entity, block, p_78481_1_, f);
+         }
+     }
+ 
 @@ -576,14 +577,8 @@
              {
                  BlockPos blockpos = new BlockPos(entity);

src/main/java/net/minecraftforge/client/ForgeHooksClient.java

@@ -196,6 +196,12 @@ public class ForgeHooksClient
         MinecraftForge.EVENT_BUS.post(fovUpdateEvent);
         return fovUpdateEvent.newfov;
     }
+    
+    public static float getFOVModifier(EntityRenderer renderer, Entity entity, Block block, double renderPartialTicks, float fov) {
+        EntityViewRenderEvent.FOVModifier event = new EntityViewRenderEvent.FOVModifier(renderer, entity, block, renderPartialTicks, fov);
+        MinecraftForge.EVENT_BUS.post(event);
+        return event.getFOV();
+    }
 
     private static int skyX, skyZ;
 

src/main/java/net/minecraftforge/client/event/EntityViewRenderEvent.java

@@ -7,8 +7,8 @@ import net.minecraftforge.fml.common.eventhandler.Cancelable;
 import net.minecraftforge.fml.common.eventhandler.Event;
 
 /**
- * Event that hooks into EntityRenderer, allowing any feature to customize visual attributes of
- * fog the player sees.
+ * Event that hooks into EntityRenderer, allowing any feature to customize visual attributes
+ *  the player sees.
  */
 public abstract class EntityViewRenderEvent extends Event
 {
@@ -94,4 +94,26 @@ public abstract class EntityViewRenderEvent extends Event
             this.roll = roll;
         }
     }
+    
+    /**
+     * Event that allows mods to alter the raw FOV itself.
+     * This directly affects to the FOV without being modified.
+     * */
+    public static class FOVModifier extends EntityViewRenderEvent
+    {
+        private float fov;
+        
+        public FOVModifier(EntityRenderer renderer, Entity entity, Block block, double renderPartialTicks, float fov) {
+            super(renderer, entity, block, renderPartialTicks);
+            this.setFOV(fov);
+        }
+
+        public float getFOV() {
+            return fov;
+        }
+
+        public void setFOV(float fov) {
+            this.fov = fov;
+        }
+    }
 }

src/test/java/net/minecraftforge/test/FOVModifierTest.java

@@ -0,0 +1,26 @@
+package net.minecraftforge.test;
+
+import net.minecraft.block.material.Material;
+import net.minecraftforge.client.event.EntityViewRenderEvent;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.Mod.EventHandler;
+import net.minecraftforge.fml.common.event.FMLInitializationEvent;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+
+/** Simple mod to test fov modifier. */
+@Mod(modid="fovmodifiertest", name="FOV Modifier Test", version="0.0.0")
+public class FOVModifierTest {
+
+    @EventHandler
+    public void init(FMLInitializationEvent event)
+    {
+    	MinecraftForge.EVENT_BUS.register(this);
+    }
+    
+    @SubscribeEvent
+    public void getFOVModifier(EntityViewRenderEvent.FOVModifier event) {
+        if(event.block.getMaterial() == Material.water)
+            event.setFOV(event.getFOV() / 60.0f * 50.0f);
+    }
+}