Add experience orb colors

src/main/java/io/github/kvverti/colormatic/Colormatic.java

@@ -62,6 +62,8 @@ public class Colormatic implements ClientModInitializer {
         new LinearColormapResource(new Identifier(MODID, "colormap/lavadrop.png"));
     public static final LinearColormapResource DURABILITY_COLORS =
         new LinearColormapResource(new Identifier(MODID, "colormap/durability.png"));
+    public static final LinearColormapResource EXPERIENCE_ORB_COLORS =
+        new LinearColormapResource(new Identifier(MODID, "colormap/xporb.png"));
     public static final CustomBiomeColormapsResource CUSTOM_BLOCK_COLORS =
         new CustomBiomeColormapsResource(new Identifier(MODID, "colormap/custom"));
     public static final GlobalLightmapResource LIGHTMAP_PROPS =
@@ -85,6 +87,7 @@ public void onInitializeClient() {
         client.registerReloadListener(MYCELIUM_PARTICLE_COLORS);
         client.registerReloadListener(LAVA_DROP_COLORS);
         client.registerReloadListener(DURABILITY_COLORS);
+        client.registerReloadListener(EXPERIENCE_ORB_COLORS);
         client.registerReloadListener(CUSTOM_BLOCK_COLORS);
         client.registerReloadListener(LIGHTMAP_PROPS);
         // Note: we don't register this as a reload listener here because it

src/main/java/io/github/kvverti/colormatic/mixin/xp/ExperienceOrbEntityRendererMixin.java

@@ -0,0 +1,87 @@
+/*
+ * Colormatic
+ * Copyright (C) 2019  Thalia Nero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.github.kvverti.colormatic.mixin.xp;
+
+import io.github.kvverti.colormatic.Colormatic;
+
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.entity.EntityRenderer;
+import net.minecraft.client.render.entity.ExperienceOrbEntityRenderer;
+import net.minecraft.entity.ExperienceOrbEntity;
+import net.minecraft.util.math.MathHelper;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+/**
+ * Controls experience orb color pulses.
+ */
+@Mixin(ExperienceOrbEntityRenderer.class)
+public abstract class ExperienceOrbEntityRendererMixin extends EntityRenderer<ExperienceOrbEntity> {
+
+    private ExperienceOrbEntityRendererMixin() {
+        super(null);
+    }
+
+    @Unique
+    private boolean custom;
+
+    @Unique
+    private int customRed;
+
+    @Unique
+    private int customGreen;
+
+    @Unique
+    private int customBlue;
+
+    @Inject(method = "method_3966", at = @At("HEAD"))
+    private void onRenderSetColor(ExperienceOrbEntity entity, double x, double y, double z, float eh, float partialTicks, CallbackInfo info) {
+        if(Colormatic.EXPERIENCE_ORB_COLORS.hasCustomColormap()) {
+            custom = true;
+            float ticksPerCycle = Colormatic.COLOR_PROPS.getProperties().getXpOrbTime() / 50.0f;
+            float frac = (1 - MathHelper.cos((entity.renderTicks + partialTicks) * (float)(2 * Math.PI) / ticksPerCycle)) / 2;
+            int color = Colormatic.EXPERIENCE_ORB_COLORS.getColorFraction(frac);
+            customRed = (color >> 16) & 0xff;
+            customGreen = (color >> 8) & 0xff;
+            customBlue = color & 0xff;
+        } else {
+            custom = false;
+        }
+    }
+
+    @Redirect(
+        method = "method_3966",
+        at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/client/render/BufferBuilder;color(IIII)Lnet/minecraft/client/render/BufferBuilder;"
+        )
+    )
+    private BufferBuilder proxyColor(BufferBuilder self, int r, int g, int b, int a) {
+        if(custom) {
+            r = customRed;
+            g = customGreen;
+            b = customBlue;
+        }
+        return self.color(r, g, b, a);
+    }
+}

src/main/java/io/github/kvverti/colormatic/properties/GlobalColorProperties.java

@@ -63,6 +63,7 @@ public class GlobalColorProperties {
     private final Map<EntityType<?>, int[]> spawnEgg;
     private final Map<ChatFormat, HexColor> textColor;
     private final TextColor text;
+    private final int xpOrbTime;
 
     private GlobalColorProperties(Settings settings) {
         this.particle = settings.particle;
@@ -77,6 +78,7 @@ private GlobalColorProperties(Settings settings) {
         this.banner = settings.banner;
         this.map = settings.map;
         this.spawnEgg = collateSpawnEggColors(settings);
+        this.xpOrbTime = settings.xporb.time;
         if(settings.text != null) {
             TextColor text = settings.text;
             this.textColor = new HashMap<>();
@@ -243,6 +245,10 @@ public int getText(ChatFormat color) {
         return getColor(color, textColor);
     }
 
+    public int getXpOrbTime() {
+        return xpOrbTime;
+    }
+
     public enum ColoredParticle implements StringIdentifiable {
         WATER("water"),
         PORTAL("portal");
@@ -325,6 +331,7 @@ private static class Settings {
         Map<String, HexColor[]> spawnegg = Collections.emptyMap();
         LegacyEggColor egg;
         TextColor text;
+        XpOrb xporb = XpOrb.DEFAULT;
     }
 
     /**
@@ -348,4 +355,10 @@ static class ButtonText {
             HexColor disabled;
         }
     }
+
+    private static class XpOrb {
+        static XpOrb DEFAULT = new XpOrb();
+
+        int time = 628; // milliseconds
+    }
 }

src/main/resources/colormatic.mixins.json

@@ -31,7 +31,8 @@
       "text.DyeColorMixin",
       "text.InGameHudMixin",
       "world.BiomeMixin",
-      "world.WorldMixin"
+      "world.WorldMixin",
+      "xp.ExperienceOrbEntityRendererMixin"
   ],
   "injectors": {
     "defaultRequire": 1