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Some Ghost-Block-Rendering Related Questions [1.12.2]

Tschipp

By Tschipp
in Modder Support

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Tschipp Diamond Finder

Tschipp

Posted
Posted

I'm trying to render ghost blocks (partially transparent blocks), but I am having some minor issues.

 

Issue #1:

Stained glass is rendered as a plain Color/Solid blocks aren't rendered as transparent:

2018-08-04_22_56_44.thumb.png.f5739fc7a4adfd5aeb8ef814ef526eac.png

Code: 

			double d0 = player.lastTickPosX + (player.posX - player.lastTickPosX) * event.getPartialTicks();
			double d1 = player.lastTickPosY + (player.posY - player.lastTickPosY) * event.getPartialTicks();
			double d2 = player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * event.getPartialTicks();

			IBlockState stateToRender = LinearHelper.getState(player);

			Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.LOCATION_BLOCKS_TEXTURE);
			BlockRendererDispatcher renderer = Minecraft.getMinecraft().getBlockRendererDispatcher();

			GlStateManager.pushMatrix();
			GlStateManager.enableBlend();
			GlStateManager.blendFunc(GL11.GL_CONSTANT_ALPHA, GL11.GL_ONE_MINUS_CONSTANT_ALPHA);

			for (BlockPos toPlace : positions) //positions is just a Collection filled with BlockPos
			{
				GlStateManager.pushMatrix();
				GlStateManager.translate(-d0, -d1, -d2);
				GlStateManager.translate(toPlace.getX(), toPlace.getY(), toPlace.getZ());
				GlStateManager.rotate(-90, 0f, 1f, 0f);
				GL14.glBlendColor(1f, 1f, 1f, 0.8f);
				renderer.renderBlockBrightness(stateToRender, 1f);
				GlStateManager.popMatrix();
			}

			GlStateManager.disableBlend();
			GlStateManager.popMatrix();

 

I've also tried changing the blend Function to  

			GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

That solved the issue of glass transparency, but it also removed the transparency of other solid blocks:

2018-08-05_00_01_51.thumb.png.a50ce6e1fc04f69981bfb8825bd57bb9.png

To be honest, I don't exactly understand what the Blend functions do. If someone could enlighten me, I would be very happy.

 

Issue #2:

The second issue is probably closely related to the first one. The preview-block (the block that gets rendered next to the cursor) is also rendered as a flat Color.

Code: 

			RenderHelper.enableGUIStandardItemLighting();
			GlStateManager.pushMatrix();

			Minecraft.getMinecraft().getRenderItem().renderItemAndEffectIntoGUI(stack, (int) (res.getScaledWidth() / 2 + (2.3 * res.getScaleFactor())), (int) (res.getScaledHeight() / 2 - (2.4 * res.getScaleFactor())));

			GlStateManager.popMatrix();
			RenderHelper.disableStandardItemLighting();

 

Issue #3:

At some positions in the world (and always at the same positions), the blockface of a partially transparent block gets rendered.

2018-08-04_22_57_39.thumb.png.bf7e0bce39e565746c20eb76ad984abb.png

It shouldn't render that blockface, it should behave like glass when it's placed down.

The code is the same as for Issue #1.

I'm really not sure why it happens, and it always happens at the same spots in the same world. As far as I can tell, nothing is special about these positions, they aren't adjacent to chunkborders or anything.

Big_Bad_E Diamond Finder

Big_Bad_E

Posted
Posted

Wait, so by ghost blocks are they just a little transparent?

 

If so shouldn't you set the block to not be an opaque cube?

 

If that's not what you're trying to do, then please make it a bit cleared, I'm having some trouble understanding your thought process.

Tschipp Diamond Finder

Tschipp

Posted
  • Author
Posted

That's not what I'm trying to do. I'm trying to render a solid block (like planks) slightly transparent, and I also want to render stained glass, just with a bit extra transparency applied to the already existing transparency of the block.

Animefan8888 Reality Controller

Animefan8888

Posted
Posted
  On 8/4/2018 at 10:09 PM, Tschipp said:

That solved the issue of glass transparency, but it also removed the transparency of other solid blocks:

Expand  

If one works for one and another works for the other one, check if the block is opaque and use the one that works for that.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

Big_Bad_E Diamond Finder

Big_Bad_E

Posted
Posted
  On 8/4/2018 at 10:35 PM, Tschipp said:

That's not what I'm trying to do. I'm trying to render a solid block (like planks) slightly transparent, and I also want to render stained glass, just with a bit extra transparency applied to the already existing transparency of the block.

Expand  

I'd suggest not to call OpenGL, and instead make a custom item and set the BakedModel to the target BakedModel, but with the texture slightly more opaque.

For help on getting the texture and displaying it, I'd check out the SecretRoomsMod's GitHub.

Tschipp Diamond Finder

Tschipp

Posted
  • Author
Posted (edited)

@Animefan8888 It's a placement identifier

 

  On 8/4/2018 at 10:58 PM, Animefan8888 said:

If one works for one and another works for the other one, check if the block is opaque and use the one that works for that.

Expand  

Yes, I guess that would kinda work, but the glass would then just have the standard transparency that it already has, and it wouldn't be decreased

 

Edited by Tschipp
Animefan8888 Reality Controller

Animefan8888

Posted
Posted
  On 8/4/2018 at 11:36 PM, Tschipp said:

Yes, see edit above

Expand  

Try using this instead. 

GlStateManager.tryBlendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO);

Also switch to using GLStateManager instead of direct OpenGL calls.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

Tschipp Diamond Finder

Tschipp

Posted
  • Author
Posted
  On 8/4/2018 at 11:45 PM, Animefan8888 said:

Try using this instead. 

GlStateManager.tryBlendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO);

 

Expand  

I tried it, but sadly the solid blocks like wood are still not transparent... The solution you suggested above might be the best one.

  Quote

Also switch to using GLStateManager instead of direct OpenGL calls.

Expand  

do you mean this statement? 

GL14.glBlendColor(1f, 1f, 1f, 0.8f);

I replaced it with this 

GlStateManager.color(1f, 1f, 1f, 0.8f);

but that didn't change anything.

Animefan8888 Reality Controller

Animefan8888

Posted
Posted
  On 8/5/2018 at 7:14 AM, Tschipp said:

I replaced it with this 

GlStateManager.color(1f, 1f, 1f, 0.8f);

but that didn't change anything.

Expand  

You do this because it is what Minecraft uses, directly calling OpenGL could mess with the GLStateManager.

  On 8/5/2018 at 7:14 AM, Tschipp said:

I tried it, but sadly the solid blocks like wood are still not transparent... The solution you suggested above might be the best one.

Expand  

Maybe, but does it work with the glass completely?

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

Cadiboo Reality Controller

Cadiboo

Posted
Posted

http://lessie2d.tumblr.com/post/28673280483/opengl-blend-function-cheat-sheet-well-this-is

 

https://www.andersriggelsen.dk/glblendfunc.php

 

Have a look at those, but you’ll be doing a lot of work by trial & error in the debugger.

 

feel free to look at all my rendering code here

https://github.com/Cadiboo/WIPTech/blob/master/src/main/java/cadiboo/wiptech/client/render/tileentity/TESRAssemblyTable.java

(Hologram part)

 

https://github.com/Cadiboo/WIPTech/blob/master/src/main/java/cadiboo/wiptech/util/Utils.java

(renderStackWithColor and renderStackIntoGUIWithColor)

  • Thanks 1

About Me

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Versions below 1.14.4 are no longer supported on this forum. Use the latest version to receive support.

When asking support remember to include all relevant log files (logs are found in .minecraft/logs/), code if applicable and screenshots if possible.

Only download mods from trusted sites like CurseForge (minecraft.curseforge.com). A list of bad sites can be found here, with more information available at stopmodreposts.org

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Tschipp Diamond Finder

Tschipp

Posted
  • Author
Posted
  On 8/5/2018 at 12:41 PM, Cadiboo said:

http://lessie2d.tumblr.com/post/28673280483/opengl-blend-function-cheat-sheet-well-this-is

 

https://www.andersriggelsen.dk/glblendfunc.php

 

Have a look at those, but you’ll be doing a lot of work by trial & error in the debugger.

 

feel free to look at all my rendering code here

https://github.com/Cadiboo/WIPTech/blob/master/src/main/java/cadiboo/wiptech/client/render/tileentity/TESRAssemblyTable.java

(Hologram part)

 

https://github.com/Cadiboo/WIPTech/blob/master/src/main/java/cadiboo/wiptech/util/Utils.java

(renderStackWithColor and renderStackIntoGUIWithColor)

Expand  

Thanks! 

Can your hologram properly render stained glass? I tried it with the blend function you used, but it didn't seem to work for me.

Cadiboo Reality Controller

Cadiboo

Posted
Posted (edited)
  On 8/5/2018 at 7:42 PM, Tschipp said:

Thanks! 

Can your hologram properly render stained glass? I tried it with the blend function you used, but it didn't seem to work for me.

Expand  

I’m not sure, I’ve only used it with solid models. Use the OpenGL cheat sheet and the blend testing page, also the way Minecraft renders water will 100% fuck up your rendering, not sure why but water doesn’t play nice with transparency/blending

Edited by Cadiboo

About Me

  Reveal hidden contents

Versions below 1.14.4 are no longer supported on this forum. Use the latest version to receive support.

When asking support remember to include all relevant log files (logs are found in .minecraft/logs/), code if applicable and screenshots if possible.

Only download mods from trusted sites like CurseForge (minecraft.curseforge.com). A list of bad sites can be found here, with more information available at stopmodreposts.org

Edit your own signature at www.minecraftforge.net/forum/settings/signature/ (Make sure to check its compatibility with the Dark Theme)

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