float f1 = entityplayer.prevRotationPitch + (entityplayer.rotationPitch - entityplayer.prevRotationPitch) * f;
float f2 = entityplayer.prevRotationYaw + (entityplayer.rotationYaw - entityplayer.prevRotationYaw) * f;
double d = entityplayer.prevPosX + (entityplayer.posX - entityplayer.prevPosX) * f;
double d1 = (entityplayer.prevPosY + (entityplayer.posY - entityplayer.prevPosY) * f + 1.6200000000000001D) - entityplayer.yOffset;
double d2 = entityplayer.prevPosZ + (entityplayer.posZ - entityplayer.prevPosZ) * f;
Vec3 vec3d = Vec3.createVectorHelper(d, d1, d2);
float f3 = MathHelper.cos(-f2 * 0.01745329F - 3.141593F);
float f4 = MathHelper.sin(-f2 * 0.01745329F - 3.141593F);
float f5 = -MathHelper.cos(-f1 * 0.01745329F);
float f6 = MathHelper.sin(-f1 * 0.01745329F);
float f7 = f4 * f5;
float f8 = f6;
float f9 = f3 * f5;
double d3 = 5D;
Vec3 vec3d1 = vec3d.addVector(f7 * d3, f8 * d3, f9 * d3);
MovingObjectPosition movingobjectposition = world.rayTraceBlocks(vec3d, vec3d1, true);
if(movingobjectposition == null)
{
return itemstack;
}