Jump to content

[1.19] Render with alpha


WhatIsABlock

Recommended Posts

I am trying to render a texture as an overlay over the inventory screen - the texture has transparency, but what is drawn in game does not.

My render code utilizes DrawScreenEvent.Post, something along the lines of this:

@SubscribeEvent
public static void onPostDrawOverlay(DrawScreenEvent.Post event){
    ... // do some checks to see if the inventory screen is open
    
    RenderSystem.disableDepthTest();
    RenderSystem.depthMask(false);
    RenderSystem.defaultBlendFunc();
    RenderSystem.setShader(GameRenderer::getPositionTexShader);
    RenderSystem.setShaderColor(1.0f, 1.0f, 1.0f, 0.7f); // I set the opacity of the draw here

    RenderSystem.setShaderTexture(0, RESOURCE_LOCATION);

    // Do scaling
    double scaledWidth = ...;
    double scaledHeight = ...;

    // Do a blit
    BufferBuilder builder = tesselator.getBuilder();
    builder.begin(VertexFormat.Mode.QUADS, DefaultVertexFormat.POSITION_TEX);
    builder.vertex(0.0D, scaledHeight, -90.0D).uv(0.0F, 1.0F).endVertex();
    builder.vertex(scaledWidth, scaledHeight, -90.0D).uv(1.0F, 1.0F).endVertex();
    builder.vertex(scaledWidth, 0.0D, -90.0D).uv(1.0F, 0.0F).endVertex();
    builder.vertex(0.0D, 0.0D, -90.0D).uv(0.0F, 0.0F).endVertex();
    tesselator.end();

    RenderSystem.depthMask(true);
    RenderSystem.enableDepthTest();
    RenderSystem.setShaderColor(1.0f, 1.0f, 1.0f, 1.0f);
}


I previously tried the exact same code within the render function of IIngameOverlay, where the opacity rendered as expected. (I didn't use IIngameOverlay because that renders below the inventory) 

Is there an extra step that I am missing? 

Link to comment
Share on other sites

RenderSystem.enableBlend()?

Boilerplate:

If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com  You should also read the support forum sticky post.

Link to comment
Share on other sites

Thank you, that was what was missing.

Updated code:

@SubscribeEvent
public static void onPostDrawOverlay(DrawScreenEvent.Post event){
    ... // do some checks to see if the inventory screen is open
    
    RenderSystem.disableDepthTest();
    RenderSystem.depthMask(false);
    RenderSystem.enableBlend();
    RenderSystem.defaultBlendFunc();
    RenderSystem.setShader(GameRenderer::getPositionTexShader);
    RenderSystem.setShaderColor(1.0f, 1.0f, 1.0f, 0.7f); // I set the opacity of the draw here

    RenderSystem.setShaderTexture(0, RESOURCE_LOCATION);

    // Do scaling
    double scaledWidth = ...;
    double scaledHeight = ...;

    // Do a blit
    BufferBuilder builder = tesselator.getBuilder();
    builder.begin(VertexFormat.Mode.QUADS, DefaultVertexFormat.POSITION_TEX);
    builder.vertex(0.0D, scaledHeight, -90.0D).uv(0.0F, 1.0F).endVertex();
    builder.vertex(scaledWidth, scaledHeight, -90.0D).uv(1.0F, 1.0F).endVertex();
    builder.vertex(scaledWidth, 0.0D, -90.0D).uv(1.0F, 0.0F).endVertex();
    builder.vertex(0.0D, 0.0D, -90.0D).uv(0.0F, 0.0F).endVertex();
    tesselator.end();

    RenderSystem.depthMask(true);
    RenderSystem.enableDepthTest();
    RenderSystem.setShaderColor(1.0f, 1.0f, 1.0f, 1.0f);
    RenderSystem.disableBlend();
}

 

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
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
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.

Announcements



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.