Jump to content
Search In
  • More options...
Find results that contain...
Find results in...

Block method differences: updatePostPlacement, onNeighborChange, neighborChanged


Alpvax
 Share

Recommended Posts

There are 3 methods which sound like they do something very similar, overridden by various different blocks:

 

  • updatePostPlacement is used to make connections with adjacent blocks (fences/walls).
/**
* Update the provided state given the provided neighbor facing and neighbor state, returning a new state.
* For example, fences make their connections to the passed in state if possible, and wet concrete powder immediately
* returns its solidified counterpart.
* Note that this method should ideally consider only the specific face passed in.
*/
public BlockState updatePostPlacement(BlockState stateIn, Direction facing, BlockState facingState, IWorld worldIn, BlockPos currentPos, BlockPos facingPos)
  • neighborChanged appears to be used for detecting redstone changes (or water in the case of sponge)
// No Javadoc
public void neighborChanged(BlockState state, World worldIn, BlockPos pos, Block blockIn, BlockPos fromPos, boolean isMoving)
  • And the forge-added onNeighborChange is called from World#updateComparatorOutputLevel:
/**
* Called when a tile entity on a side of this block changes is created or is destroyed.
* @param world The world
* @param pos Block position in world
* @param neighbor Block position of neighbor
*/
default void onNeighborChange(BlockState state, IWorldReader world, BlockPos pos, BlockPos neighbor)

My question is which method should be overridden for what purpose, as many of the call paths are similar. I have spent quite a bit of time trying to trace the call paths and have become lost multiple times.

I was using neighborChanged, but switched to using updatePostPlacement (as that already supplies the direction, and sounds more like what I needed (making connections between blocks)). The effect in-game did not change, so I am wondering when I should be using each of these methods.

 

There is also the following forge-added method, which doesn't appear to be overridden anywhere, and is only called by the blockstate method of the same name, which is itself not called:

/**
* Called on an Observer block whenever an update for an Observer is received.
*
* @param observerState The Observer block's state.
* @param world The current world.
* @param observerPos The Observer block's position.
* @param changedBlock The updated block.
* @param changedBlockPos The updated block's position.
*/
default void observedNeighborChange(BlockState observerState, World world, BlockPos observerPos, Block changedBlock, BlockPos changedBlockPos)

 

Link to comment
Share on other sites

So here's my understanding (assuming all positions are loaded):

updatePostPlacement - Connections of a block with adjacent block called for all directions given a face.

neighborChanged - Connections of a block with the adjacent block called for all directions (doesn't rely on a specific face).

onNeighborChange - Connections of a tile entity with the adjacent block for all directions (doesn't rely on a specific face).

observedNeighborChange - Probably a misaligned patch when ported but was originally used for observer updates.

 

So the difference is mainly that updatePostPlacement are used for changing the state of a block in most cases. neighborChanged is for changing the block state that doesn't rely on a specific situation based on the specific block face. Then onNeighborChange is the tile entity version of neighborChanged.

Link to comment
Share on other sites

Slight correction, based on my understanding:

updatePostPlacement - called immediately after the player places the block in order to check to see if any state change should occur based on neighbors. (Eg. placing concrete powder next to existing water)

neighborChanged onNeighborChange - called when a neighbor changes state in order to see if any state change is necessary. (Eg. water flows into the space next to concrete powder)

observedNeighborChange - specific to the observer block, but similar to neighborChanged. I haven't messed with it.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



  • Recently Browsing

    No registered users viewing this page.

  • Posts

    • How do you know it's the attributes' problem? For me it sounds more like it's not ticking. (maybe forgot to call super, or the server is frozen.)   Btw you're on the wrong sub forum
    • Basically, my attributes for my TankEntity are not going through. I'm DIRECTLY porting from 1.17, and it worked fine on 1.17 and 16, so I'm pretty confused here. The Entity extends Pig and within it, this is for creating the attributes. public static AttributeSupplier.Builder createAttributes() { return Pig.createLivingAttributes() .add(Attributes.MAX_HEALTH, 90.0D) .add(Attributes.MOVEMENT_SPEED, 0.14f) .add(Attributes.KNOCKBACK_RESISTANCE, 10.0D) .add(Attributes.FOLLOW_RANGE, 0.0D); } Then, in my EntityTypes Registry, I add the attributes.  @Mod.EventBusSubscriber(modid = TankMod.MOD_ID, bus = Mod.EventBusSubscriber.Bus.MOD) public class TankModEntityTypes { ..... @SubscribeEvent public static void entityAttributesInit(EntityAttributeCreationEvent event) { event.put(TANK_ENTITY_TYPE.get(), TankEntity.createAttributes().build()); } I just don't understand why its not working. This worked fine , before. The Entity spawns, but it weirdly just floats in the air, and when hit it goes red and doesn't stop being red. When the player rides it, its health also doesn't go down. Really strange stuff.  I looked at some other mods which have entity attributes, and it works fine in them. If there's anything else I need to show let me know.
    • Catch up with the last topic with rendering, this is something that I took a while to learn from nothing to this stage. (I only shoot from right side) public static List<Pair<BlockRayTraceResult, Float>> rayTraceAndPenetrateBlocks4(World world, List<Vector3d> vecs, float health, Function<BlockState, Float> getHealthReduction) { List<Pair<BlockRayTraceResult, Float>> results = new ArrayList<>(); if (vecs.isEmpty()) return results; Vector3d startVec = vecs.get(0); for (int i=0;i<vecs.size()-1;i++) { Vector3d vec = vecs.get(i); Vector3d next = vecs.get(i + 1); BlockPos pos = new BlockPos(vec); BlockPos pos2 = new BlockPos(next); BlockState blockstate = world.getBlockState(pos); BlockState blockstate2 = world.getBlockState(pos2); if (blockstate.getBlock() instanceof BarrierBlock && blockstate2.getBlock() instanceof BarrierBlock) continue; VoxelShape blockShape = blockstate.getCollisionShape(world, pos, ISelectionContext.dummy()); VoxelShape blockShape2 = blockstate2.getCollisionShape(world, pos2, ISelectionContext.dummy()); BlockRayTraceResult blockResult; boolean empty = blockShape.isEmpty() || blockShape.toBoundingBoxList().stream().noneMatch((bb) -> bb.offset(pos).contains(vec)); boolean empty2 = blockShape2.isEmpty() || blockShape2.toBoundingBoxList().stream().noneMatch((bb) -> bb.offset(pos2).contains(next)); if ((isRayTraceIgnorableBlock(blockstate, blockShape) && isRayTraceIgnorableBlock(blockstate2, blockShape2))) continue; if (empty && !empty2) blockResult = world.rayTraceBlocks(vec, next, pos2, blockShape2, blockstate2); else if (!empty && empty2) blockResult = world.rayTraceBlocks(next, vec, pos, blockShape, blockstate); else blockResult = world.rayTraceBlocks(vec, next, pos, blockShape, blockstate); if (blockResult != null) { health -= getHealthReduction.apply(blockstate); results.add(new Pair<>(blockResult, (float) startVec.distanceTo(blockResult.getHitVec()))); if (health <= 0) break; } } return results; } public static List<Vector3d> getAllVectors2(Vector3d startVec, Vector3d endVec, int distance) { List<Vector3d> vecs = new ArrayList<>(); Vector3d step = endVec.subtract(startVec).normalize(); int rayTraceCount = 20; for (int i=0;i<distance;i++) for (int j=0;j<rayTraceCount;j++) vecs.add(startVec.add(step.scale(i).add(step.scale((float) j / (float) rayTraceCount)))); return vecs; } The vecs passed into the first method comes from the second method. The concept is to gather a collection of vectors, and the do ray trace between each of them. The first method can be a lot more simplified but not on my case since I also do entity penetrations, with damage calculations...etc. Anyways, if you only do normal raytracing what you will get will be something like:   Black Block represents a solid block Gray Block represents air or empty shaped block Green dots represents the positions we ray trace between. Blue dots represents the ray trace hit result. As you can see, the ray trace hit will not (unlikely) hit the surface when coming out of a block, therefore we need to detect the situation and ray trace back wards: So we get the "entering" and "exiting" points.   Here comes the rendering part once again, once you have let the client know where is hit you can perform the rendering based on the ray trace result. private static void renderObjectAt(Minecraft minecraft, EnvironmentObjectEffect object, World world, MatrixStack stack, float size, float offsetScale, ResourceLocation texture) { Vector3d vec = object.getVec(); stack.push(); Vector3d view = Minecraft.getInstance().gameRenderer.getActiveRenderInfo().getProjectedView(); double x = vec.x - view.getX(); double y = vec.y - view.getY(); double z = vec.z - view.getZ(); if (Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2)) > 100.0F) return; stack.translate(x, y, z); Direction direction = object.getDirection(); if (direction != null) { Vector3i offset = direction.getDirectionVec(); stack.translate(offset.getX() * offsetScale, offset.getY() * offsetScale, offset.getZ() * offsetScale); rotateByDirection(stack, direction); } else { stack.rotate(minecraft.getRenderManager().getCameraOrientation()); stack.rotate(Vector3f.ZP.rotationDegrees(180.0F)); } if (object.doBlend()) { Color colour = new Color(world.getBlockState(object.getPos()).getMaterialColor(world, object.getPos()).colorValue); RenderSystem.color4f(colour.getRed() / 255.0F, colour.getGreen() / 255.0F, colour.getBlue() / 255.0F, object.getTransparency()); } AVAClientUtil.blit(stack, texture, -size, -size, size, size); RenderSystem.color4f(1.0F, 1.0F, 1.0f, 1.0F); stack.pop(); } direction is facing from the BlockRayTraceResult, and doBlend is true so it will look better with the block behind it. The offset is required otherwise it will be on the same level with the block, the offset scale is a small number so there will not be an obvious gap between the wall and the texture object, the scale also prevents multiple objects overlap, for example when I have multiple "renderable objects": for (EnvironmentObjectEffect bulletHole : AVACommonUtil.cap(world).getBulletHoles()) renderObjectAt(minecraft, bulletHole, world, stack, 0.075F, 0.01F, BULLET_HOLE); for (EnvironmentObjectEffect blood : AVACommonUtil.cap(world).getBloods()) renderObjectAt(minecraft, blood, world, stack, 0.525F, 0.011F, BLOOD); for (EnvironmentObjectEffect knifeHole : AVACommonUtil.cap(world).getKnifeHoles()) renderObjectAt(minecraft, knifeHole, world, stack, 0.095F, 0.0105F, KNIFE_HOLE); for (EnvironmentObjectEffect grenadeMark : AVACommonUtil.cap(world).getGrenadeMarks()) renderObjectAt(minecraft, grenadeMark, world, stack, 2.5F, 0.075F, GRENADE_MARK); bullet hole < knife hole < blood < grenade mark (level) Red Image    
    • Hi, this article is more of a experience sharing instead of a tutorial, the code themselves should be self-explanatory, and the way I do things may not be the best practice, or most efficient. Product:   I started with the textures, we need the textures/icons that are being rendered to the world, and the ones for the UI. The blue textures are used when the option is hovered. Then, we need to find out where the mouse is at and which one is selected, we can check the distance and angle from the screen center and decide which part it is on: private int getHoveringType(Minecraft minecraft) { double mX = minecraft.mouseHelper.getMouseX(); double mY = minecraft.mouseHelper.getMouseY(); double actualW = minecraft.getMainWindow().getWidth() / 2.0F; double actualH = minecraft.getMainWindow().getHeight() / 2.0F; double mX2 = mX - actualW; double mY2 = mY - actualH; double angle = AVAWeaponUtil.getAngleFromCoord(mX2, -mY2) + 30; if (Math.sqrt(mX2 * mX2 + mY2 * mY2) <= 15 * minecraft.getMainWindow().getGuiScaleFactor()) return -1; if (angle > 360 || angle <= 60) return 0; return ((int) angle / 60); } public static double getAngleFromCoord(double x, double y) { double angle; angle = abs(atan2(x, y) * 180.0D / PI); if (x < 0) angle = 360 - angle; return angle; } In this case the angle is 60 because 360 / 6 options = 60, and if the mouse is within radius of 15 from the screen center then no action is performed (-1) And then the rendering can be done. @Override public void render(Minecraft minecraft, PlayerEntity player, MatrixStack stack, IPlayerAction capability, float screenWidth, float screenHeight) { float x = screenWidth / 2.0F; float y = screenHeight / 2.0F; float size = 60; int type = getHoveringType(minecraft); AVAClientUtil.blit(stack, type == -1 ? UI_BG_LIT : UI_BG, x - size, y - size, x + size, y + size); for (int i = 0; i < 6; i++) { stack.push(); stack.translate(x, y, 0.0F); stack.rotate(Vector3f.ZP.rotationDegrees(i * 60)); stack.translate(-x, -y, 0.0F); AVAClientUtil.blit(stack, type == i ? UI_BG_2_LIT : UI_BG_2, x - size, y - size, x + size, y + size); stack.pop(); } AVAClientUtil.blit(stack, UI_BG_ICON_LAYER, x - size, y - size, x + size, y + size); } public static void blit(MatrixStack stack, @Nullable ResourceLocation texture, float x1, float y1, float x2, float y2) { if (texture != null) Minecraft.getInstance().getTextureManager().bindTexture(texture); Matrix4f matrix = stack.getLast().getMatrix(); Tessellator tessellator = Tessellator.getInstance(); BufferBuilder bufferbuilder = tessellator.getBuffer(); bufferbuilder.begin(7, DefaultVertexFormats.POSITION_TEX); bufferbuilder.pos(matrix, x1, y2, 0.0F).tex(0.0F, 1.0F).endVertex(); bufferbuilder.pos(matrix, x2, y2, 0.0F).tex(1.0F, 1.0F).endVertex(); bufferbuilder.pos(matrix, x2, y1, 0.0F).tex(1.0F, 0.0F).endVertex(); bufferbuilder.pos(matrix, x1, y1, 0.0F).tex(0.0F, 0.0F).endVertex(); tessellator.draw(); } If the type is -1, then the circle at the center use the blue texture. Otherwise if the type equals the index of the option, it uses the blue texture (or just use RenderSystem.color4f). By rotating an identical texture we don't need to have 6 different textures for each option.     public static boolean ACTIVE = false; public static Vector3d VEC = null; @Override public void tick(Minecraft minecraft, PlayerEntity player) { if (minecraft.isGameFocused() && minecraft.currentScreen == null && AVAClientConfig.ENABLE_PING_HOTKEY.get()) { if (AVAClientUtil.middleMouseDown()) { if (!ACTIVE) { Vector3d eye = AVAWeaponUtil.getEyePositionFor(player); BlockRayTraceResult result = player.world.rayTraceBlocks(new RayTraceContext(eye, eye.add(player.getLookVec().scale(100.0F)), RayTraceContext.BlockMode.VISUAL, RayTraceContext.FluidMode.NONE, player)); if (result.getType() != RayTraceResult.Type.MISS) { ACTIVE = true; minecraft.mouseHelper.ungrabMouse(); if (minecraft.gameSettings.keyBindPickBlock.getKey().getKeyCode() == GLFW.GLFW_MOUSE_BUTTON_MIDDLE) AVAClientUtil.unpressKeybind(minecraft.gameSettings.keyBindPickBlock); VEC = result.getHitVec(); } } } else { int type = getHoveringType(minecraft); if (ACTIVE && VEC != null && type != -1) AVAPackets.INSTANCE.sendToServer(new PingMessage(VEC, ActivePingEffect.Type.values()[type])); reset(minecraft); } } else reset(minecraft); } If player's focusing, the middle mouse is down, then we check if there's terrain (block) in player's sight within 100 blocks, if not, reset the vec, regrab the mouse and set active to false. MouseHelper#ungrabMouse call allows players to move mouse around the screen.   Once we have the VEC set (where the ping will occur), we can render a line between the center of the screen and the ping location. (White line) { ActiveRenderInfo info = minecraft.gameRenderer.getActiveRenderInfo(); Vector3f view = info.getViewVector(); Vector3d vec = info.getProjectedView().add(view.getX(), view.getY(), view.getZ()); drawLine(stack, (float) vec.x, (float) vec.y, (float) vec.z, (float) pingVec.x, (float) pingVec.y, (float) pingVec.z, 255, 255, 255, 1.0F) } public static void drawLine(MatrixStack stack, float x1, float y1, float z1, float x2, float y2, float z2, int r, int g, int b, float a) { AVAClientUtil.drawTransparent(true); IRenderTypeBuffer.Impl impl = IRenderTypeBuffer.getImpl(Tessellator.getInstance().getBuffer()); IVertexBuilder builder = impl.getBuffer(RenderType.LINES); Vector3d view = Minecraft.getInstance().gameRenderer.getActiveRenderInfo().getProjectedView(); stack.push(); stack.translate(-view.x, -view.y, -view.z); Matrix4f matrix = stack.getLast().getMatrix(); builder.pos(matrix, x1, y1, z1).color(r, g, b, (int) (a * 255.0F)).endVertex(); builder.pos(matrix, x2, y2, z2).color(r, g, b, (int) (a * 255.0F)).endVertex(); stack.pop(); impl.finish(); AVAClientUtil.drawTransparent(false); RenderSystem.color4f(1.0F, 1.0F, 1.0F, 1.0F); } If you did not add the look offset to the camera position it will not be visible.   Then we send a packet to the server to notify all other players that I've ping the location. Once players receives the location of the pings, it's time to render them. RenderSystem.disableDepthTest(); AVAClientUtil.drawTransparent(true); Vector3d view = Minecraft.getInstance().gameRenderer.getActiveRenderInfo().getProjectedView(); Vector3d vec = activePing.getVec(); double distance = activePing.getVec().distanceTo(view); if (distance > 100.0F) continue; renderObjectAt(minecraft, activePing, world, stack, (float) (distance / 20.0F), 0.0F, activePing.getTexture()); double x = vec.x - view.getX(); double y = vec.y - view.getY(); double z = vec.z - view.getZ(); stack.push(); stack.translate(x, y, z); stack.rotate(minecraft.getRenderManager().getCameraOrientation()); stack.rotate(Vector3f.ZP.rotationDegrees(180.0F)); float size = (float) (distance / 200.0F); stack.scale(size, size, size); IRenderTypeBuffer.Impl impl = IRenderTypeBuffer.getImpl(Tessellator.getInstance().getBuffer()); String text = AVACommonUtil.round(distance, 2) + "m"; minecraft.fontRenderer.func_243247_a(new StringTextComponent(text), -minecraft.fontRenderer.getStringWidth(text) / 2.0F, 10, AVAConstants.AVA_HUD_TEXT_WHITE, false, stack.getLast().getMatrix(), impl, true, 0, 15728880); impl.finish(); stack.pop(); private static void renderObjectAt(Minecraft minecraft, EnvironmentObjectEffect object, World world, MatrixStack stack, float size, float offsetScale, ResourceLocation texture) { Vector3d vec = object.getVec(); stack.push(); Vector3d view = Minecraft.getInstance().gameRenderer.getActiveRenderInfo().getProjectedView(); double x = vec.x - view.getX(); double y = vec.y - view.getY(); double z = vec.z - view.getZ(); if (Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2)) > 100.0F) return; stack.translate(x, y, z); Direction direction = object.getDirection(); if (direction != null) { Vector3i offset = direction.getDirectionVec(); stack.translate(offset.getX() * offsetScale, offset.getY() * offsetScale, offset.getZ() * offsetScale); rotateByDirection(stack, direction); } else { stack.rotate(minecraft.getRenderManager().getCameraOrientation()); stack.rotate(Vector3f.ZP.rotationDegrees(180.0F)); } if (object.doBlend()) { Color colour = new Color(world.getBlockState(object.getPos()).getMaterialColor(world, object.getPos()).colorValue); RenderSystem.color4f(colour.getRed() / 255.0F, colour.getGreen() / 255.0F, colour.getBlue() / 255.0F, object.getTransparency()); } AVAClientUtil.blit(stack, texture, -size, -size, size, size); RenderSystem.color4f(1.0F, 1.0F, 1.0f, 1.0F); stack.pop(); }   In the code I change the size of the object according to the distance ( (distance / 20.0F) ), so the object will stay at similar size no matter the distance between them, and so does the text size. The direction is always null, and doBlend is false. They are used in my other renderings.      
    • Hello There! We got another Hunger Games for you guys and in this episode we get so lucky right off the bat and we get 4 diamonds so we knew as soon as we got this we had to win! However something happens that I am not gonna spoil but it doesn't change too much within us winning! There are some hilarious moments in this episode that I know you guys are gonna love! I hope you all enjoy this video and if you did please consider subscribing and liking the video while you are at it!  
  • Topics

  • Who's Online (See full list)

×
×
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy.