Before I render line from one block to another I translate it with negative player position, that works fine  but when I sneak the line moves up and down. How I can prevent that?

You'd have to offset by the player's eye height too, rather than just position.

Thanks and another question, so I am interpolating players last and current position with partialTicks, it works but when I am moving its is rendering it a little bit behind the actual position. I think it is because of usage of lastPos but there must be some way to fix it.

1 hour ago, MineGame159 said:

I think it is because of usage of lastPos but there must be some way to fix it.

Post your code.

GlStateManager.pushMatrix();
GlStateManager.disableTexture();
GlStateManager.disableLighting();
GlStateManager.disableDepthTest();
GlStateManager.enableBlend();
GlStateManager.blendFuncSeparate(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, 1, 0);
GlStateManager.lineWidth(1);

Vec3d renderPos = Utils.getInterpolatedEyePos(MC.player, event.getPartialTicks());
RenderEvent renderEvent = new RenderEvent(GeometryTessellator.getInstance(), renderPos, event.getPartialTicks());
renderEvent.resetTranslation();
MinecraftForge.EVENT_BUS.post(renderEvent);

GlStateManager.lineWidth(1);
GlStateManager.disableBlend();
GlStateManager.enableDepthTest();
GlStateManager.enableLighting();
GlStateManager.enableTexture();
GlStateManager.popMatrix();

GeometryTesselattor extends Tesselator and adds some helper functions.

RenderEvent.resetTranslation() translates tesselators buffer by renderPos. (Passed in constructor)

Utils.getInterpolatedEyePos():

public static Vec3d getInterpolated(Entity entity, double x, double y, double z) {
    return new Vec3d((entity.posX - entity.lastTickPosX) * x, (entity.posY - entity.lastTickPosY) * y, (entity.posZ - entity.lastTickPosZ) * z);
}
public static Vec3d getInterpolated(Entity entity, double ticks) {
    return getInterpolated(entity, ticks, ticks, ticks);
}
public static Vec3d getInterpolatedPos(Entity entity, double ticks) {
    return new Vec3d(entity.posX, entity.posY, entity.posZ).add(getInterpolated(entity, ticks)) ;
}
public static Vec3d getInterpolatedEyePos(Entity entity, double ticks) {
    return getInterpolatedPos(entity, ticks).add(0, entity.getEyeHeight(), 0);
}

And when I Subscribe to that event is just adds some vertices to buffer and calls tesselators draw method.

If you can help me it would be awesome.

I have a similar problem. When I draw something in world on RenderWorldLastEvent, everything works fine except when player sneaks.

 

 

And here is my code.

 

        @SubscribeEvent
        public static void onRenderWorldLast(RenderWorldLastEvent event) {
            BlockRenderer.renderBlockOutline(event.getPartialTicks()); // XXX render one block at 1, 1, 1 for testing
        }

 

    public static void renderBlockOutline(float partialTicks) {
        ClientPlayerEntity playerEntity = Minecraft.getInstance().player;
        double x = playerEntity.lastTickPosX + (playerEntity.posX - playerEntity.lastTickPosX) * partialTicks;
        double y = playerEntity.lastTickPosY + (playerEntity.posY - playerEntity.lastTickPosY) * partialTicks;
        double z = playerEntity.lastTickPosZ + (playerEntity.posZ - playerEntity.lastTickPosZ) * partialTicks;

        //LogManager.getLogger().info(playerEntity.getEyePosition(partialTicks));
        //Vec3d eyePos = playerEntity.getEyePosition(partialTicks);
        //Vec3d eyePos = Minecraft.getInstance().getRenderViewEntity().getEyePosition(partialTicks);

        GlStateManager.pushMatrix();

        //GlStateManager.translated(-eyePos.x, -eyePos.y, -eyePos.z);
        GlStateManager.translated(-x, -y - playerEntity.getEyeHeight(), -z);
        GlStateManager.translated(-9, 63, 6);

        GlStateManager.disableCull();
        GlStateManager.disableDepthTest();
        GlStateManager.disableTexture();

        GlStateManager.color4f(1, 1, 1, 1);
        //GlStateManager.lineWidth(1);

        Tessellator tessellator = Tessellator.getInstance();
        BufferBuilder bufferBuilder = tessellator.getBuffer();

        bufferBuilder.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION);

        bufferBuilder.pos(0, 0, 0).endVertex();
        bufferBuilder.pos(1, 0, 0).endVertex();
        bufferBuilder.pos(1, 0, 1).endVertex();
        bufferBuilder.pos(0, 0, 1).endVertex();

        bufferBuilder.pos(0, 1, 0).endVertex();
        bufferBuilder.pos(1, 1, 0).endVertex();
        bufferBuilder.pos(1, 1, 1).endVertex();
        bufferBuilder.pos(0, 1, 1).endVertex();

        tessellator.draw();

        GlStateManager.enableDepthTest();
        GlStateManager.enableTexture();

        GlStateManager.popMatrix();
    }

 

5 hours ago, RedLaboratory said:

I have a similar problem. When I draw something in world on RenderWorldLastEvent, everything works fine except when player sneaks.

 

On 8/23/2019 at 11:22 AM, Draco18s said:

You'd have to offset by the player's eye height too, rather than just position.

This means the y value not all of the values as it seems you were doing.

On 8/24/2019 at 9:20 AM, MineGame159 said:

If you can help me it would be awesome.

Can you show me what you mean by it being behind the actual position?

I somehow figured out how to fix this problem.

 

        Vec3d projectedView = Minecraft.getInstance().gameRenderer.getActiveRenderInfo().getProjectedView();
        GlStateManager.translated(-projectedView.x, -projectedView.y, -projectedView.z);

 

That function returns exactly what I want.