Package net.ixdarklord.coolcatcanvas.api.client.gui

Class ItemOpacityRenderer

java.lang.Object

net.ixdarklord.coolcatcanvas.api.client.gui.ItemOpacityRenderer

public final class ItemOpacityRenderer
extends Object

Items drawn in a GUI at an opacity, fixed or animated: a HUD card fading in with its icon, a slot greying out.

 ItemOpacityRenderer.render(graphics, stack, x, y, 0.5F);                      // half see-through
 ItemOpacityRenderer.renderWithDecorations(graphics, font, stack, x, y, 0.5F); // with its count and bar

 var fade = ItemOpacityRenderer.OpacityTween.in(10).start(); // keep it, and draw each frame:
 ItemOpacityRenderer.render(graphics, stack, x, y, fade);

 ItemOpacityRenderer.withOpacity(0.5F, () -> graphics.renderItem(stack, x, y)); // anything that draws items
 

The game draws most items solid (blocks, beds, anything with a block entity model), which an alpha can't see through: it only darkens them. So while the shader color's alpha is under 1, every item a GuiGraphics draws is drawn with a see-through version of its render type (the same texture, translucent), and fades as flat items do; enchantment glints stay as they are. That holds for items the game itself draws too, so a mod that fades a part of the HUD through the shader color fades its items with it.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ItemOpacityRenderer.OpacityTween	An opacity eased from one value to another over a time, for an item fading in or out.

Method Summary

Modifier and Type	Method	Description
static void	render(net.minecraft.client.gui.GuiGraphics graphics, net.minecraft.world.item.ItemStack stack, int x, int y, float opacity)	Draws an item as GuiGraphics.renderFakeItem(net.minecraft.world.item.ItemStack, int, int) does, at an opacity from 0 to 1.
static void	render(net.minecraft.client.gui.GuiGraphics graphics, net.minecraft.world.item.ItemStack stack, int x, int y, ItemOpacityRenderer.OpacityTween fade)	Draws an item at the opacity a fade is at now.
static void	renderWithDecorations(net.minecraft.client.gui.GuiGraphics graphics, net.minecraft.client.gui.Font font, net.minecraft.world.item.ItemStack stack, int x, int y, float opacity)	Draws an item with its count and durability bar, as a slot shows it, at an opacity from 0 to 1.
static void	renderWithDecorations(net.minecraft.client.gui.GuiGraphics graphics, net.minecraft.client.gui.Font font, net.minecraft.world.item.ItemStack stack, int x, int y, ItemOpacityRenderer.OpacityTween fade)	Draws an item with its count and durability bar at the opacity a fade is at now.
static void	withOpacity(float opacity, Runnable draw)	Runs drawing at an opacity from 0 to 1: the shader color's alpha is scaled by it meanwhile, so the items drawn (and the text and sprites, which already fade by it) are see-through.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

render

public static void render(net.minecraft.client.gui.GuiGraphics graphics,
 net.minecraft.world.item.ItemStack stack,
 int x,
 int y,
 float opacity)

Draws an item as GuiGraphics.renderFakeItem(net.minecraft.world.item.ItemStack, int, int) does, at an opacity from 0 to 1.

render

public static void render(net.minecraft.client.gui.GuiGraphics graphics,
 net.minecraft.world.item.ItemStack stack,
 int x,
 int y,
 ItemOpacityRenderer.OpacityTween fade)

Draws an item at the opacity a fade is at now.

renderWithDecorations

public static void renderWithDecorations(net.minecraft.client.gui.GuiGraphics graphics,
 net.minecraft.client.gui.Font font,
 net.minecraft.world.item.ItemStack stack,
 int x,
 int y,
 float opacity)

Draws an item with its count and durability bar, as a slot shows it, at an opacity from 0 to 1.

renderWithDecorations

public static void renderWithDecorations(net.minecraft.client.gui.GuiGraphics graphics,
 net.minecraft.client.gui.Font font,
 net.minecraft.world.item.ItemStack stack,
 int x,
 int y,
 ItemOpacityRenderer.OpacityTween fade)

Draws an item with its count and durability bar at the opacity a fade is at now.

withOpacity

public static void withOpacity(float opacity,
 Runnable draw)

Runs drawing at an opacity from 0 to 1: the shader color's alpha is scaled by it meanwhile, so the items drawn (and the text and sprites, which already fade by it) are see-through. Nothing is drawn at 0. The shader color is put back after.