feat: the start of the aurora!!!

it was pain send help

src/main/java/me/theclashfruit/arctic/mixin/WorldRendererAccessor.java

@@ -0,0 +1,15 @@
+package me.theclashfruit.arctic.mixin;
+
+import net.minecraft.client.render.WorldRenderer;
+import net.minecraft.client.world.ClientWorld;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(WorldRenderer.class)
+public interface WorldRendererAccessor {
+    @Accessor("world")
+    ClientWorld getWorld();
+
+    @Accessor("world")
+    void setWorld(ClientWorld world);
+}

src/main/java/me/theclashfruit/arctic/mixin/WorldRendererMixin.java

@@ -0,0 +1,87 @@
+package me.theclashfruit.arctic.mixin;
+
+import com.mojang.blaze3d.systems.RenderSystem;
+import net.minecraft.client.gl.Framebuffer;
+import net.minecraft.client.gl.VertexBuffer;
+import net.minecraft.client.render.*;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.client.world.ClientWorld;
+import org.jetbrains.annotations.Nullable;
+import org.joml.Matrix4f;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(WorldRenderer.class)
+public class WorldRendererMixin {
+    @Nullable
+    private VertexBuffer auroraBuffer;
+
+    @Inject(method = "<init>*", at = @At("TAIL"))
+    public void WorldRenderer(CallbackInfo ci) {
+        this.renderAurora();
+    }
+
+    @Unique
+    private void renderAurora() {
+        Tessellator tessellator     = Tessellator.getInstance();
+        BufferBuilder bufferBuilder = tessellator.getBuffer();
+
+        RenderSystem.setShader(GameRenderer::getPositionProgram);
+
+        if (auroraBuffer != null) {
+            auroraBuffer.close();
+        }
+
+        auroraBuffer = new VertexBuffer(VertexBuffer.Usage.STATIC);
+
+        BufferBuilder.BuiltBuffer builtBuffer = renderAurora(bufferBuilder);
+
+        auroraBuffer.bind();
+        auroraBuffer.upload(builtBuffer);
+
+        VertexBuffer.unbind();
+    }
+
+    @Unique
+    private BufferBuilder.BuiltBuffer renderAurora(BufferBuilder buffer) {
+        buffer.begin(VertexFormat.DrawMode.DEBUG_LINES, VertexFormats.POSITION_COLOR);
+
+        // TODO: Make an actual thing
+        float amplitude = 0.5f;
+        float frequency = 1.5f;
+
+        for (int i = 0; i <= 100; i++) {
+            float x = i * 0.1f;
+            float y = amplitude * (float) Math.sin(frequency * x);
+            float z = 5f;
+
+            buffer.vertex(x, y, z).color(0, 255, 0, 255).next();
+
+            x += 0.1f;
+
+            y = amplitude * (float) Math.sin(frequency * x);
+
+            buffer.vertex(x, y, z).color(0, 255, 0, 255).next();
+        }
+
+        return buffer.end();
+    }
+
+    @Inject(method = "renderSky(Lnet/minecraft/client/util/math/MatrixStack;Lorg/joml/Matrix4f;FLnet/minecraft/client/render/Camera;ZLjava/lang/Runnable;)V", at = @At("TAIL"))
+    public void renderSky(MatrixStack matrices, Matrix4f projectionMatrix, float tickDelta, Camera camera, boolean thickFog, Runnable fogCallback, CallbackInfo ci) {
+        float u = ((WorldRendererAccessor) this).getWorld().method_23787(tickDelta) * (1.0f - ((WorldRendererAccessor) this).getWorld().getRainGradient(tickDelta));
+
+        if (u > 0.0f) {
+            RenderSystem.setShaderColor(u, u, u, u);
+            BackgroundRenderer.clearFog();
+            auroraBuffer.bind();
+            auroraBuffer.draw(matrices.peek().getPositionMatrix(), projectionMatrix, GameRenderer.getPositionProgram());
+            VertexBuffer.unbind();
+            fogCallback.run();
+        }
+    }
+}

src/main/resources/arctic.mixins.json

@@ -0,0 +1,15 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "me.theclashfruit.arctic.mixin",
+  "compatibilityLevel": "JAVA_17",
+  "mixins": [
+  ],
+  "client": [
+    "WorldRendererAccessor",
+    "WorldRendererMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}

src/main/resources/assets/arctic/particles/aurora.json

@@ -0,0 +1,5 @@
+{
+  "textures": [
+    "minecraft:dirt"
+  ]
+}

src/main/resources/fabric.mod.json

@@ -24,6 +24,15 @@
       "me.theclashfruit.arctic.Arctic"
     ]
   },
+  "mixins": [
+    "arctic.mixins.json"
+  ],
+  "depends": {
+    "fabricloader": ">=${loader_version}",
+    "fabric": ">=${fabric_version}",
+    "geckolib": ">=${geckolib_version}",
+    "minecraft": "${minecraft_version}"
+  },
   "custom": {
     "modmenu": {
       "links": {
@@ -31,11 +40,5 @@
       },
       "update_checker": true
     }
-  },
-  "depends": {
-    "fabricloader": ">=${loader_version}",
-    "fabric": ">=${fabric_version}",
-    "geckolib": ">=${geckolib_version}",
-    "minecraft": "${minecraft_version}"
   }
 }