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package me.xmrvizzy.skyblocker.utils.culling;
import com.logisticscraft.occlusionculling.OcclusionCullingInstance;
import com.logisticscraft.occlusionculling.cache.ArrayOcclusionCache;
import com.logisticscraft.occlusionculling.util.Vec3d;
import me.xmrvizzy.skyblocker.utils.FrustumUtils;
import net.minecraft.client.MinecraftClient;
public class OcclusionCulling {
private static final int TRACING_DISTANCE = 128;
private static final MinecraftClient CLIENT = MinecraftClient.getInstance();
private static OcclusionCullingInstance instance = null;
// Reused objects to reduce allocation overhead
private static Vec3d cameraPos = new Vec3d(0, 0, 0);
private static Vec3d min = new Vec3d(0, 0, 0);
private static Vec3d max = new Vec3d(0, 0, 0);
/**
* Initializes the occlusion culling instance
*/
public static void init() {
instance = new OcclusionCullingInstance(TRACING_DISTANCE, new WorldProvider(), new ArrayOcclusionCache(TRACING_DISTANCE), 2);
}
private static void updateCameraPos() {
var camera = CLIENT.gameRenderer.getCamera().getPos();
cameraPos.set(camera.x, camera.y, camera.z);
}
/**
* This first checks checks if the bounding box is within the camera's FOV, if
* it is then it checks for whether it's occluded or not.
*
* @return A boolean representing whether the bounding box is fully visible or
* not.
*/
public static boolean isVisible(double x1, double y1, double z1, double x2, double y2, double z2) {
if (!FrustumUtils.isVisible(x1, y1, z1, x2, y2, z2)) return false;
updateCameraPos();
min.set(x1, y1, z1);
max.set(x2, y2, z2);
return instance.isAABBVisible(min, max, cameraPos);
}
}
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