/*
 * Decompiled with CFR 0.146.
 */
package net.minecraft.client;

// ...

public class Camera {
    // ...

    // Camera distance for 3rd persion view
    private double getMaxZoom(double d /* = 4.0 */ ) {
        // Generate 3 bit combinations, corresponding to 8 cube edges
        for (int i = 0; i < 8; ++i) {
            double d2;
            BlockHitResult blockHitResult;
            Vec3 vec3;
            // Use bits to calculate cube edge offset
            float f = (i & 1) * 2 - 1;
            float f2 = (i >> 1 & 1) * 2 - 1;
            float f3 = (i >> 2 & 1) * 2 - 1;
            // Apply offset
            Vec3 vec32 = this.position.add(f *= 0.1f, f2 *= 0.1f, f3 *= 0.1f);
            // Ray trace vec32 -> vec32 - forwards * d (I guess that's what it should be)
            if (((HitResult)(blockHitResult = this.level.clip(new ClipContext(vec32, vec3 = new Vec3(
                    this.position.x - (double)this.forwards.x() * d + (double)f + (double)f3, // <-- What?
                    this.position.y - (double)this.forwards.y() * d + (double)f2,
                    this.position.z - (double)this.forwards.z() * d + (double)f3
                ), ClipContext.Block.VISUAL, ClipContext.Fluid.NONE, this.entity)))).getType() == HitResult.Type.MISS
                || !((d2 = blockHitResult.getLocation().distanceTo(this.position)) < d)) continue;
            d = d2; // Find smallest distance
        }
        return d;
    }

    // ...
}