feat: pathing target render

src/main/java/symbolics/division/armistice/client/MechaPlayerControl.java

@@ -82,11 +82,11 @@ private static void onRightClick(LocalPlayer player, MechaEntity mecha, int acti
 
 		HitResult raycast = Minecraft.getInstance().getCameraEntity().pick(200, 0, false);
 		if (raycast.getType() == HitResult.Type.MISS) return;
-
 		player.connection.send(new MechaMovementRequestC2SPayload(raycast.getLocation().toVector3f()));
 		mecha.core().setPathingTarget(raycast.getLocation().toVector3f());
-		System.out.println("sound");
 		player.playSound(ArmisticeSoundEventRegistrar.ENTITY$MECHA$ALERT, 0.3f, AudioUtil.randomizedPitch(player.getRandom(), 1, 0.4f));
+
+
 	}
 
 }

src/main/java/symbolics/division/armistice/client/render/hud/MechaHudRenderer.java

@@ -2,19 +2,25 @@
 
 import com.mojang.blaze3d.platform.GlStateManager;
 import com.mojang.blaze3d.systems.RenderSystem;
+import net.minecraft.client.Camera;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.player.LocalPlayer;
+import net.minecraft.client.renderer.GameRenderer;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.Mth;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.phys.Vec2;
 import net.minecraft.world.phys.Vec3;
 import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.neoforge.client.event.RegisterGuiLayersEvent;
+import org.joml.Matrix4f;
+import org.joml.Quaternionf;
+import org.joml.Vector3f;
 import org.joml.Vector4f;
 import symbolics.division.armistice.Armistice;
 import symbolics.division.armistice.client.ArmisticeClient;
 import symbolics.division.armistice.mecha.MechaEntity;
+import symbolics.division.armistice.mixin.GameRenderAccessor;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -42,6 +48,7 @@ public final class MechaHudRenderer {
 	private static final ResourceLocation BIG_ELEV_TICK = Armistice.id("textures/hud/big_elev_tick.png");
 
 	private static final ResourceLocation CROSSHAIR = Armistice.id("textures/hud/crosshair.png");
+	private static final ResourceLocation PATHTARGET = Armistice.id("textures/hud/pathtarget.png");
 
 	@SubscribeEvent
 	private static void registerGuiLayers(RegisterGuiLayersEvent event) {
@@ -73,6 +80,7 @@ private static void registerGuiLayers(RegisterGuiLayersEvent event) {
 			renderCrosshair(drawHelper, mecha);
 			renderHeat(drawHelper, mecha);
 			renderElevation(drawHelper, mecha);
+			renderPathtarget(drawHelper, mecha);
 
 			RenderSystem.disableBlend();
 			RenderSystem.defaultBlendFunc();
@@ -325,6 +333,68 @@ private static void renderHeading(DrawHelper drawHelper, MechaEntity mecha) {
 		resetColor();
 	}
 
+	private static void renderPathtarget(DrawHelper drawHelper, Entity mecha) {
+		float gw = drawHelper.guiGraphics().guiWidth();
+		float gh = drawHelper.guiGraphics().guiHeight();
+		float ar = gw / gh;
+		if (mecha instanceof MechaEntity mechaEntity) {
+			var tgt = mechaEntity.core().getPathingTarget();
+			if (tgt != null) {
+				GameRenderer gr = Minecraft.getInstance().gameRenderer;
+				Entity cameraEntity = Minecraft.getInstance().getCameraEntity();
+				Camera cam = gr.getMainCamera();
+
+				double fov = Math.max(
+					Minecraft.getInstance().options.fov().get().intValue(),
+					((GameRenderAccessor) gr).invokeGetFov(cam, cam.getPartialTickTime(), false)
+				);
+
+				// camera to screen matrix
+				Matrix4f mat = gr.getProjectionMatrix(fov);
+
+				// world to camera matrix
+				Vec3 camPos = cameraEntity.getEyePosition(cam.getPartialTickTime());
+				mat.rotate(cam.rotation().conjugate(new Quaternionf()));
+				mat.translate((float) -camPos.x, (float) -camPos.y, (float) -camPos.z);
+
+				Vector3f p = mat.transformPosition(tgt.toVector3f());
+
+				if (p.z < 0) return; // not in frame
+
+				// perspective division!!!!!!
+				p.mul(1 / p.z);
+				float screenX = gw / 2 * (p.x + 1);
+				float screenY = gh / 2 * (-p.y + 1);
+
+				drawHelper.renderFlicker(
+					pos -> drawHelper.guiGraphics().blit(
+						PATHTARGET,
+						(int) pos.x, (int) pos.y,
+						15, 15,
+						0, 0,
+						15, 15,
+						15, 15
+					),
+					new Vec2(
+						screenX - 9,
+						screenY - 9
+					),
+					lightbulbColor()
+				);
+
+				drawHelper.renderCenteredNumber(
+					(int) camPos.distanceTo(tgt),
+					screenX,
+					screenY + 10,
+					1,
+					lightbulbColor()
+				);
+
+				resetColor();
+			}
+		}
+	}
+
 	private static void renderSpeedometer(DrawHelper drawHelper, Entity mecha) {
 		final float bottomOffset = drawHelper.guiGraphics().guiHeight() - drawHelper.guiGraphics().guiHeight() / 3f;
 		final float leftOffset = drawHelper.guiGraphics().guiWidth() / 4.6f;

src/main/java/symbolics/division/armistice/mecha/MechaCore.java

@@ -239,4 +239,9 @@ public void setHeat(int heat) {
 	public void setPathingTarget(Vector3f pos) {
 		chassis.setPathingTarget(new Vec3(pos));
 	}
+
+	@Nullable
+	public Vec3 getPathingTarget() {
+		return chassis.pathingTarget;
+	}
 }

src/main/java/symbolics/division/armistice/mixin/GameRenderAccessor.java

@@ -0,0 +1,12 @@
+package symbolics.division.armistice.mixin;
+
+import net.minecraft.client.Camera;
+import net.minecraft.client.renderer.GameRenderer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(GameRenderer.class)
+public interface GameRenderAccessor {
+	@Invoker
+	double invokeGetFov(Camera activeRenderInfo, float partialTicks, boolean useFOVSetting);
+}

src/main/resources/armistice.mixins.json

@@ -10,6 +10,7 @@
 		"defaultRequire": 1
 	},
 	"client": [
+		"GameRenderAccessor",
 		"GameRendererMixin",
 		"GuiMixin"
 	]