[1.10.2]GuiContainer: draw texture in foreground of an item in slot

[Mark136]

Hello all,

 

i'm currently busy with creating a custom Crafting table, and i want to show the craftable items in the gui.

i have a gui that shows 4 colums and 5 rows slots and i want to extend it with scrolling(more colums), like in the creative tab.

 

but i have no idea how to begin.

do i need to add a buttom (like guiSlider) or something like that? 

or is it just trying to understand whats in the GuiContainerCreative class?

 

EDIT: done with the scrollbar, i now need to know how to draw a texture in the foreground if an Item in a slot

 

 

 

[Alexiy]

Yes, look at the GuiContainerCreative#handleMouseInput method, this is where scrolling is handled.

[Mark136]

yeah! i did it, but now have some other things what i don't understand, i want blacken/fading out a slot, as some conditions are true, this is possible with OpenGL, right?

 

and i want to know how to hide an item in the slot without removing the item from the slot. i mean, it needs to be hidden behind a texture. how do i do that?

drawGuiContainerForegroundLayer only hides that white glow when i hovering with my mouse on the slot.

[Animefan8888]

yeah! i did it, but now have some other things what i don't understand, i want blacken/fading out a slot, as some conditions are true, this is possible with OpenGL, right?

 

and i want to know how to hide an item in the slot without removing the item from the slot. i mean, it needs to be hidden behind a texture. how do i do that?

drawGuiContainerForegroundLayer only hides that white glow when i hovering with my mouse on the slot.

You will have to draw something to the screen over it.

[Draco18s]

i want blacken/fading out a slot, as some conditions are true, this is possible with OpenGL, right?

 

Just draw something else over the top.

I do something similar here:

https://github.com/Draco18s/ReasonableRealism/blob/master/src/main/java/com/draco18s/industry/client/gui/GuiContainerFilter.java#L67-L71

It draws a section of the gui texture I already have over the slots (and behind items) any time the TE says that it doesn't have any filters (i.e. your "when some condition is true").  The visual ends up looking like this:

 

http://vignette1.wikia.nocookie.net/reasonable-realism/images/7/73/Filter_no.png/revision/latest?cb=20150419162009[/img]

[Mark136]

i don't think you understand what i mean, i also want to draw the texture over the Item in the slot,

 

currently i can make the slot darker but the item in the slot still pushing to the top of everything, giving me a dark slot background. but the item is still in the front.

 

i don't have an idea how to simply draw something over a slot with an item in it.

[Draco18s]

i don't think you understand what i mean

 

Yes I do.

And I don't know if you can draw over the item.  I was telling you how I did something similar.  You would probably need to override drawScreen and possibly replace drawSlot.

[Mark136]

I think your right Draco18s, DrawItemStack is called after drawGuiContainerForegroundLayer

and drawSlot is private, also DrawItemStack and isMouseOverSlot are private.

 

so there is'nt no other way  :'( 

 

then I have a lot of work to do. 

[Mark136]

i see some z values in drawItemStack : zLevel and ItemRender.zLevel.

and some translate stuff what sets the z index to 32:

private void drawItemStack(ItemStack stack, int x, int y, String altText)
    {
        GlStateManager.translate(0.0F, 0.0F, 32.0F);
        this.zLevel = 200.0F;
        this.itemRender.zLevel = 200.0F;
        net.minecraft.client.gui.FontRenderer font = null;
        if (stack != null) font = stack.getItem().getFontRenderer(stack);
        if (font == null) font = fontRendererObj;
        this.itemRender.renderItemAndEffectIntoGUI(stack, x, y);
        this.itemRender.renderItemOverlayIntoGUI(font, stack, x, y - (this.draggedStack == null ? 0 : , altText);
        this.zLevel = 0.0F;
        this.itemRender.zLevel = 0.0F;
    }

 

and here some code of the minecraft GuiContainer#drawScreen :

 

 public void drawScreen(int mouseX, int mouseY, float partialTicks)
    {
        this.drawDefaultBackground();
        int i = this.guiLeft;
        int j = this.guiTop;
        this.drawGuiContainerBackgroundLayer(partialTicks, mouseX, mouseY);
        GlStateManager.disableRescaleNormal();
        RenderHelper.disableStandardItemLighting();
        GlStateManager.disableLighting();
        GlStateManager.disableDepth();
        super.drawScreen(mouseX, mouseY, partialTicks);
        RenderHelper.enableGUIStandardItemLighting();
        GlStateManager.pushMatrix();
        GlStateManager.translate((float)i, (float)j, 0.0F);
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
        GlStateManager.enableRescaleNormal();
        this.theSlot = null;
        int k = 240;
        int l = 240;
        OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240.0F, 240.0F);
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);

        for (int i1 = 0; i1 < this.inventorySlots.inventorySlots.size(); ++i1)
        {
            Slot slot = (Slot)this.inventorySlots.inventorySlots.get(i1);
            this.drawSlot(slot);

            if (this.isMouseOverSlot(slot, mouseX, mouseY) && slot.canBeHovered())
            {
                this.theSlot = slot;
                GlStateManager.disableLighting();
                GlStateManager.disableDepth();
                int j1 = slot.xDisplayPosition;
                int k1 = slot.yDisplayPosition;
                GlStateManager.colorMask(true, true, true, false);
                this.drawGradientRect(j1, k1, j1 + 16, k1 + 16, -2130706433, -2130706433);
                GlStateManager.colorMask(true, true, true, true);
                GlStateManager.enableLighting();
                GlStateManager.enableDepth();
            }
        }

        RenderHelper.disableStandardItemLighting();
        this.drawGuiContainerForegroundLayer(mouseX, mouseY);
        RenderHelper.enableGUIStandardItemLighting();
        InventoryPlayer inventoryplayer = this.mc.thePlayer.inventory;
        ItemStack itemstack = this.draggedStack == null ? inventoryplayer.getItemStack() : this.draggedStack;

        if (itemstack != null)
        {
            int j2 = 8;
            int k2 = this.draggedStack == null ? 8 : 16;
            String s = null;

            if (this.draggedStack != null && this.isRightMouseClick)
            {
                itemstack = itemstack.copy();
                itemstack.stackSize = MathHelper.ceiling_float_int((float)itemstack.stackSize / 2.0F);
            }
            else if (this.dragSplitting && this.dragSplittingSlots.size() > 1)
            {
                itemstack = itemstack.copy();
                itemstack.stackSize = this.dragSplittingRemnant;

                if (itemstack.stackSize == 0)
                {
                    s = "" + TextFormatting.YELLOW + "0";
                }
            }

            this.drawItemStack(itemstack, mouseX - i - 8, mouseY - j - k2, s);
        }

        if (this.returningStack != null)
        {
            float f = (float)(Minecraft.getSystemTime() - this.returningStackTime) / 100.0F;

            if (f >= 1.0F)
            {
                f = 1.0F;
                this.returningStack = null;
            }

            int l2 = this.returningStackDestSlot.xDisplayPosition - this.touchUpX;
            int i3 = this.returningStackDestSlot.yDisplayPosition - this.touchUpY;
            int l1 = this.touchUpX + (int)((float)l2 * f);
            int i2 = this.touchUpY + (int)((float)i3 * f);
            this.drawItemStack(this.returningStack, l1, i2, (String)null);
        }

        GlStateManager.popMatrix();

        if (inventoryplayer.getItemStack() == null && this.theSlot != null && this.theSlot.getHasStack())
        {
            ItemStack itemstack1 = this.theSlot.getStack();
            this.renderToolTip(itemstack1, mouseX, mouseY);
        }

        GlStateManager.enableLighting();
        GlStateManager.enableDepth();
        RenderHelper.enableStandardItemLighting();
    }

 

are the z values responsible for that the Items are always in front?

[MadMartian]

are the z values responsible for that the Items are always in front?

 

I am working off of 1.7.10 but perhaps this will still offer some relevance.  I ran into an issue with overlays with an inventory container, I wanted to overlay a progress indicator over the item stack, I ran into some issues but I resolved by turning off depth test:

 

            GL11.glDisable(GL11.GL_LIGHTING);
            GL11.glDisable(GL11.GL_DEPTH_TEST);
            GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
            GL11.glEnable(GL11.GL_BLEND);
            GL11.glColorMask(true, true, true, false);

            mc.renderEngine.bindTexture(dialog);

            // Draw progress overlay
         
            GL11.glEnable(GL11.GL_DEPTH_TEST);
            GL11.glEnable(GL11.GL_LIGHTING);

 

As for hiding your item, it seems to me that you could accomplish that by enabling a blend function before the item stack is rendered with source GL_ZERO and destination GL_DST_COLOR and then disable the blend function after the item stack is rendered.

[Animefan8888]

I think your right Draco18s, DrawItemStack is called after drawGuiContainerForegroundLayer

and drawSlot is private, also DrawItemStack and isMouseOverSlot are private.

 

so there is'nt no other way  :'( 

 

then I have a lot of work to do. 

Draw ItemStack is indeed called after drawContainerForeground, but drawSlots is called before drawContainerForeground so all you need to do is change the zLevel field in your gui before and then after you draw your texture/image aver the slots.

[Mark136]

Thanks MadMartian btw, disabling the depht fixes my problem now the Items spawn under the Textures!