fix compatibility with OptiFine AA & AF

src/main/kotlin/mods/betterfoliage/loader/Refs.kt

@@ -102,6 +102,8 @@ object Refs {
     val CPmatchesBlock = MethodRef(ConnectedProperties, "matchesBlock", ClassRef.boolean, ClassRef.int, ClassRef.int)
     val CPmatchesIcon = MethodRef(ConnectedProperties, "matchesIcon", ClassRef.boolean, TextureAtlasSprite)
 
+    val quadSprite = FieldRef(VertexBuffer, "quadSprite", TextureAtlasSprite)
+
     // ShadersMod
     val SVertexBuilder = ClassRef("shadersmod.client.SVertexBuilder")
     val sVertexBuilder = FieldRef(VertexBuffer, "sVertexBuilder", SVertexBuilder)

src/main/kotlin/mods/octarinecore/client/render/ModelRenderer.kt

@@ -1,5 +1,6 @@
 package mods.octarinecore.client.render
 
+import mods.betterfoliage.loader.Refs
 import mods.octarinecore.common.*
 import net.minecraft.client.Minecraft
 import net.minecraft.client.renderer.VertexBuffer
@@ -48,6 +49,10 @@ class ModelRenderer : ShadingContext() {
             if (quadFilter(quadIdx, quad)) {
                 val drawIcon = icon(this, quadIdx, quad)
                 if (drawIcon != null) {
+                    // let OptiFine know the texture we're using, so it can
+                    // transform UV coordinates to quad-relative
+                    Refs.quadSprite.set(worldRenderer, drawIcon)
+
                     quad.verts.forEachIndexed { vertIdx, vert ->
                         temp.init(vert).rotate(rotation).translate(trans)
                         val shader = if (aoEnabled && !forceFlat) vert.aoShader else vert.flatShader

src/main/kotlin/mods/octarinecore/metaprog/Reflection.kt

@@ -164,4 +164,6 @@ class FieldRef(val parentClass: ClassRef,
 
     /** Get this static field using reflection. */
     fun getStatic() = get(null)
+
+    fun set(receiver: Any?, obj: Any?) { element?.set(receiver, obj) }
 }